IMCAD023 CODE

The International Marine Contractors Association

Diving Equipment Systems Inspection Guidance Note

DESIGN for Surface Oriented (Air) Diving Systems Record Sheets

Record of Inspections Name of vessel/installation:

Brief description of diving system:

Last Audit/Inspection Carried out by: Date: Location:

Non Conformances/Points Noted

Date Resolved

Index to Detail Sheets 1

General Safety

2

Dive Control

3

Twinlock Air Chamber

4

Diver Launch and Recovery System

5

Diving Basket

6

Wet Bell

7

Wet Bell Main Umbilical

8

Diver Heating System

9

Divers’ Umbilicals

10

Divers’ Personal Equipment

11

Compressors

12

HP Air and Gas Storage

Section 1 – General Safety Page 1 of 2

IMCA D 023 – DESIGN for Surface Oriented (Air) Diving Systems

General Safety Item

1

Description

Requirement

Need

Acces ccess s to Wate Water r

1.1

Safety

Divers mu must be be ab able to to en enter an and le leave th the wa water sa safely an and in in a contro controlle lled d manner manner.. This This should should be possib possible le in all normal normal and reasonably foreseeable circumstances.

A

1.2

DP Vessels

W he hen diving fr from a vessel on on DP DP, th the di divers ac access to to th the wa water must be in an area which is a suitable distance away from any thruster or other object likely to cause problems.

A

The prime responsibility while diving from a vessel on DP is that the diver, his umbilical and his equipment are physical restrained from coming in to contact with any thruster or obstruction. This normally means restricting umbilical lengths. A record should be made of any such restrictions.

A

If a lad ladder der is is to to be be use used d as as a mean means s of of acc acces ess s to/ to/fr from om the the wat water er then hen itit should be securely mounted, extend at least 2 metres (6 feet) below the water and have sufficient hand holds above water to allow the diver to step easily on to the deck.

A

A ladder should not be the primary means of exit from the water if the deck on to which the diver has to climb is more than 2 metres (6 feet) above the water surface

A

1.3 1.3

Div Diving ing La Ladder dder

1.4

Emerge Emergency ncy Recove Recovery ry

Arrang Arrangeme ements nts must must be in plac place e to recove recoverr an injure injured d or unco unconsc nsciou ious s diver from the water to the deck

A

1.5

Surface Decompression

If using surface decompression techniques, there must be clear and easy access to the recompression chamber from the point where the diver surfaces. This must allow the diver diver to be inside the chamber and under pressure within the maximum time allowed by the tables in use.

A

An assessment should be available showing which diving equipment is needed for the safe completion of a dive if the vessel power fails.

A

2 2.1

Emer Emerge genc ncy y Powe Power r General

Response

Certificate Issue Date

Section 1 – General Safety Page 2 of 2


Item

Description

Requirement

2.2

Power Supply

Any e qu quipment i de dentified a s ne necessary m us ust b e ab able t o co continue operating in the event of loss of the vessels primary power. This may be by the use of batteries, stored energy (hydraulic or air power), connection to an emergency generator etc.

Need

A

Response


Section 2 – Dive Control Page 1 of 5


Dive Control Item

Description

1

General

1.1

Location

1.2

1.3

Fire Fighting

Requirement

Dive control should be easily accessible from diving site

1.5 1.5

A

The Diving Supervisor Supervisor must be protected from weather and other elem elemen ents ts (inc (inclu ludi ding ng drop droppe ped d obje object cts) s) whic which h may may affe affect ct his his concentration. This also means he must be kept suitably warm (or cool)

A

The Diving Supervisor needs good access to all relevant areas of control and should be able to read all gauges and displays without difficulty.

A

Dive control and its controls controls should be adequately adequately illuminated illuminated for operations at night (if relevant)

A

Suitable fire fighting arrangements must be near to dive control

A

Testing If a fixed fixed system system then then functi function on test test needed needed in last last six months, months, if D 018, Sheet 15 & 16 portable a visual examination and check of fill level needed

A

First Aid

First ai aid eq equipment to to th the st standard re required by by the di diving co contractors manuals should be provided.

A

This This should should have have been been checke checked d within within the last six months months for completeness and expiry dates

A

The first aid equipment should be in clearly marked container(s) 1.4 1.4

Need

Doc Documen umenttatio ation n

Brea Breath thin ing g App Appar arat atus us

Copi Copies es of of the the divi diving ng con contr trac acto tor’ r’s s manu manual als s and and div diving ing rule rules s shou should ld be be available in dive control

A A

Emergency procedures should be readily available

A

Divi Diving ng logs logs and and othe otherr rele releva vant nt docu docume ment ntat atio ion n shou should ld be main mainta tain ined ed

A

If the vessel operates on DP then a diagram of all thrusters and other obstructions should be displayed in dive control. There should also be a diagram of the maximum permitted lengths of divers umbilical for each depth for the specific dive station position(s) onboard

A

Emer Emerge genc ncy y breat breathi hing ng appa appara ratu tus s fitte fitted d with with comms comms must must be avail availab able le for the Diving Diving Supervis Supervisor or so that that he may perform perform his duties duties in a polluted atmosphere.

A

Response


Section 2 – Dive Control Page 2 of 5 Item

2 2.1

2.2


Description

Requirement

Need

Testing D 018, Sheet 5.1 & 9.1

Visual Visual examinatio examination n and function test (including (including comms) in last 6 months. Check made at same time that cylinder is fully charged

A

External External visual examination examination of cylinder plus gas leak test to max. working pressure in last 2½ years

A

Internal and external visual examination of cylinder plus gas leak test to max. working pressure in last 5 years. (Possible overpressure test)

A

If di diving is is ta taking pl place fr from a ve vessel th then th there sh should be be bo both primary and secondary means of communication between dive control and the bridge.

A

If the vessel is operating on DP then the primary link must be hard wire and dedicated.

A

Two way voice communications with each diver and the standby diver should exist.

A

These facilities should be fitted with a back up power source, such as batteries.

B

A recorder (tape or video) must be fitted to record all communications between divers and supervisor. There should be spare tapes to allow for retention for 24 hours after the dive is over. There should be a means of playing back the recording after the dive

A

Comm Commun unic icat atio ions ns Bridge

Divers

2.3

Chamber

If ch chamber is is remote from dive co control (and is to to be be used while di diving is taking place) then there should be communications between the two areas.

A

2.4

Launch & Recovery Point

The Diving Supervisor should have verbal communications with the winch operator

A

2.5

Other Areas

The Di Diving Su Supervisor sh should ha have vo voice co communication wi with ot other areas, if relevant. This may include machinery operators, crane drivers etc.

A

2.6

ROV

If an an RO ROV is is in in us use in in co conjunction wi with di diving op operations th then th there must be a dedicated dedicated hard wire communica communications tions link between the Diving Supervisor and the ROV operator.

A

Response


Section 2 – Dive Control Page 3 of 5 Item

Description

2.7

Testing D 018, Sheet 6

3


Requirement

Need

All communications links should have been examined and function tested in the last 6 months

A

ROV

If an an RO ROV is is in in us use in in co conjunction wi with di diving op operations, th the Di Diving Supervisor must have a monitor in dive control showing him the same picture as the ROV operator.

A

3.2 3.2

Work Workin ing g Are Areas as

The The Div Divin ing g Supe Superv rvis isor or sho shoul uld d be be abl able e to to see see (di (dire rect ctlly or by video ideo link link)) the launch/recovery area, the chamber and any working areas which are appropriate.

A

Alarms

4.1

DP

If diving is being carried out from a vessel operating on DP then an audio/visual alarm activated by the DP operator must be fitted in dive control to inform the supervisor of the DP status. It should be tested before each dive when operating on DP.

A

4.2 4.2

Gene Genera rall Emer Emerge genc ncy y

The The vesse vessell or inst instal alla lati tion on gene genera rall alarm alarm must must be linke linked d in to dive dive control (or sited close by) so that the supervisor is aware of it.

A

Any audio (bell, klaxon etc) must be capable of being muted or cancelled to allow the supervisor to hear his other communications

A

5


Surv Survei eill llan ance ce

3.1

4

Response

Air Supp Suppllies ies – sections

NB

Nitrox may be used in place of air in certain circumstances. If this is being used, then substitute ‘Nitrox’ for the word ‘air’ in the following

5.1

Sources

Sufficient so sources of of air, of br breathing qu quality, mu must be be av available and suitably arranged so that if the on line supply to the diver fails, an alternative supply can be immediately switched on

A

5.2

To the Diver

The ai air su supply to to ea each di diver mu must be be ar arranged su such th that if if on one liline fails then this does not interfere with the supply to another diver

A

5.3

Surface Standby Diver

There must be a primary air supply to the standby sufficient to allow him to rescue an injured injured diver and arranged to be separate separate from the main supply to the working diver(s).

A

There must be a secondary back up supply to the standby diver but this may be common with the working diver(s) main supply, provided it is protected from any malfunctions

A



Item

Description

Requirement

5.4

In W at ater Standby Diver

If an in water standby diver is used (such as in a wet bell) then his supplies must meet the same criteria as those for the surface standby above, save that his primary supply may come from the cylinders on the wet bell.

A

5.5

Monitoring

There mu must be be an an ox oxygen an analyser wi with an an au audio/visual hi hi/lo al alarm fitted in line on the downstream gas supply to the diver(s)

A


Analysers should be examined, function tested and calibrated within the last 6 months

A

The Di Diving Su Supervisor mu must ha have av available to to hi him en enough su suitable gauges so that he is aware of the depth of each diver and of the supply pressures of each main and back up breathing supply.

A

A pressure limiting device may be fitted to avoid gauges being over pressurised

C

These are gauges used to provide information for operational and decompression control. The scale should be appropriate to the duty i.e. large enough to be read easily and accurately. They should normally operate in the range 0 to 75% of full scale deflection and should have scale divisions of no more than 0.5msw/2 fsw

A

If the gauge gauge is digital digital then the display display should be large large and clear enough to be read in all conditions. It must be clearly marked on the unit whether it reads in feet or metres and it should display the reading to one decimal point. (If further information is required, refer to AODC 059)

A

These are gauges which indicate pressure but are not directly used for life support. They should be positioned positioned to show the line pressure pressure of supplies supplies coming in to the panel and also of any supplies leaving the panel

A

They should meet the requirements for depth gauges above except that they may be much smaller and with larger scale divisions. They are not calibrated as depth gauges.

A

6

Gauges

6.1

General

6.2

6.3

6.4

Depth

Air Supply

Calibration D 018, Sheets 18-20

All gauges should have been calibrated to the required required accuracy in the last 6 months

Need

Response




Item

Description

Requirement

6.5 6.5

Cros Cross s Over Over Valv Valves es

Grea Greatt care care shou should ld be tak taken en if cro cross ss over over val valve ves s are fitt fitted ed wit with h the result result that any gauge can possibly possibly read more than one thing. thing. Cross over valves should either be fixed in one position (the handles may be removed to avoid accidental changes) or should indicate very clearly what supply they are connected to. In any event any gauge fitted with a crossover valve must indicate very clearly at all times exactly what it is reading

7 7.1

Pipe Pipewo work rk and and Valv Valves es General

All valves should be free of corrosion and should operate easily

A

The function of all valves should be clearly marked

A

Valves carrying oxygen at a pressure higher than 15 bar should not be quarter turn. Testing D 018, Sheet 23.1 & 24.2

8 8.1

Need

A

Exhaust pipework should not vent in to an enclosed space.

A

Valves an and pi pipework ne need vi visually ex examined in in la last si six months

A

Valves Valves and pipewo pipework rk need need a gas leak test test to maximu maximum m workin working g pressure in last 2 years.

A

All electrical equipment should have been visually examined and function tested in the last 6 months. Cables should have continuity and resistance tests

A

Electrics Testing D 018, Sheet 11

Response


Section 3 – Twinlock Air Chamber Page 1 of 6


Twinlock Air Chamber Item

Description

1

General

1.1

Location

1.2 1.2

1.3

1.4

Requirement

Chamber mu must be be ea easily ac accessible fr from di diving si site. Tr Trip ha hazards should be removed where possible or highlighted.

A

Provision must be made to combat extremes in temperature for the chamber, its occupants and the operator. Chamber and operator must also be protected from any other elements (including dropped objects) which may affect operations

A

Operator needs good access to all relevant areas of chamber

A

The chamber, its general area and controls should be adequately illuminated for operations at night.

B

Comm Commun unic icat atio ions ns

If cham chambe berr is is rem remot ote e fro from m div dive e con contr trol ol ther there e mus mustt be be a sui suita tabl ble e mea means ns of communication between the two locations.

A


Communications (if fitted) must be examined and function tested in last six months

A

Fire Fighting

Suitable fire fighting arrangements must be near to the chamber

2.1

A

Testing If a fixed fire fighting system then a function test is needed in the last D 018, Sheet 15 & 16 six months, if portable a visual examination and check of fill level needed

A

First Aid

First ai aid eq equipment to to th the st standard re required by by the di diving co contractors manuals should be provided.

A

This This should should have have been been checke checked d within within the last six months months for completeness and expiry dates

A

The first aid equipment should be in clearly marked container(s) 2

Need

A

Cham Chambe berr Exte Extern rnal al Pressure Hull

Manufactured to a recognised standard

A

Testing D 018, Sheet 25.1

Visual examination within last six months

A

Gas leak test at full working pressure in last 2½ years

A

Internal overpressure test in last five years

A

Response


Section 3 – Twinlock Air Chamber Page 2 of 6


Item

Description

Requirement

2.2

Viewports Viewports

Manufactur Manufactured ed to a recognised recognised standard, standard, tested tested to 1.25 max. pressure, pressure, less than 10 years old.

A


Visual examination every six months, checked for scratches, cracks and discolouration.

A

Gas leak test at full working pressure in last 2½ years as part of the chamber

A

Internal overpressure test in last five years as part of chamber 2.3

Paintwork

In good condition and free from corrosion Any chamber insulation should should be in good condition

2.4

2.5

2.6 2.6

Medical Lock

Medical lock fitted to the main lock of the chamber

2.8

A B B A

The external external door must be fitted with an interlock interlock device to stop opening while under pressure

A

Seals and sealing faces must be in good condition, free of corrosion and lightly greased

A

Lighti Lighting ng

If extern external al lights lights are used used to illumi illuminat nate e the chambe chamberr intern internall ally, y, they they should be sited such that they do not expose the viewports to undue heat

A


Any lights and cables should have a visual examination and function test in the last six months

A

Pen Penetra etrati tion ons s

All All gas gas or liqu liquid id pen penetra etrati tion ons s mus mustt be be fifitted tted with ith a valv alve or or oth other er simi simila lar r device close to the hull to stop sudden pressure loss.

A

Electr Electrica icall penetr penetrati ations ons must must be certif certified ied as fit for purpos purpose e by a competent person for this application

A

All penetrations should be clearly clearly marked to show their function function 2.7

Need

A

Pressu Pressure re Reli Relief ef Valve Valve

The chambe chamberr shoul should d be fitt fitted ed with with an an overpr overpress essure ure relief relief valv valve e rated rated to to a suitable pressure (normally full working pressure)

A


The pressure relief valve should be visually examined in the last six months

A

The pressure relief valve should be function tested at the required setting and then gas leak tested along with the chamber in the last 2½ years.

A

Valves and Pipework


A

Response


Section 3 – Twinlock Air Chamber Page 3 of 6 Item

Description


Requirement

The function of all valves should be clearly marked


A

Valves carrying oxygen at a pressure higher than 15 bar should not be quarter turn.

A

Exhaust pipework (particularly overboard dumps) should vent into a well ventilated area and not into an enclosed space.

A

Valv Valves es and and pip pipew ewor ork k nee need d vis visua uall exam examin inat atio ion n wit withi hin n las lastt six six mont months hs

Valves Valves and pipewo pipework rk need need a gas leak test test to maximu maximum m workin working g pressure in last 2 years. 3

Need

A

A

Cham Chambe berr Inte Intern rnal al

3.1

Paintwork

In good condition and free from corrosion

B

3.2

Doors

All doors mu must mo move fr freely through th their fu full ra range of of mo movement an and be able to be secured open

B

Doors must be able to be opened from either side

A

Where appropriate do doors sh should ha have an an equalising va valve.

A

Seals and sealing faces must be in good condition, free of paint or corrosion and lightly greased with a suitable compound

A

3.3

Viewports D 018, Sheet 25.2

Visual examination every six months, checked for scratches, cracks and discolouration.

A

3.4 3.4

Pen Penetra etrati tion ons s

All All gas gas or liqu liquid id pen penetra etrati tion ons s mus mustt be be fifitted tted with ith a valv alve or or oth other er simi simila lar r close to the hull to stop catastrophic pressure loss.

A

All penetrations should be clearly clearly marked to show their function function

A

Inlet penetrations should be fitted with silencers or diffusers

A

Exhaust penetrations (including medical lock) should be fitted with diffusers or guards to stop trapping of fingers or equipment 3.5

Valves and Pipework

A


A

The function of each valve should be clearly marked

A


A

Response



3.6 3.6


Description

Requirement


Valves an and pi pipework ne need vi visually ex examined in in la last si six months

Comm Commun unic icat atio ions ns

3.8

3.9

3.10

A


A

The There sh should ould be be a syst system em in in eac each com compart partme ment nt fo for two two way way audi audio o communication between chamber occupants and outside.

A

A secondary or back up system system should be provided

3.7

Need

A


Communications should be examined and function tested in the last six months

A

Lighting Lighting

Lighting Lighting sufficient sufficient to illuminate illuminate both compartmen compartments ts internally internally should should be provided

A


Any lights and cables should have a visual examination and function test in the last six months

A

A system should be fitted to allow occupants of both compartments to breathe a gas other than ambient atmosphere.

A

In each compartment there should be one set of pipework and a mask for each occupant plus one spare

A

In the main compartment, exhaust gas should be dumped outside the chamber

B


The system should have been examined and function tested in the last six months

A

Comfort

There should be facilities in the main compartment for two divers to lie down comfortably.

A

BIBS

Any bunks fitted should be securely securely mounted

A

Sanitary arrangements may be supplied, depending on the length of time it is intended the occupants will be inside.

C

An interlock must be fitted to to any sanitary facility venting outside outside

A


If a sanita sanitary ry system system is fitted fitted,, it should should have been been examin examined ed and function tested in the last six months

A

Fire Fighting

A means of fire fighting must be available inside the main compartment.

B

Response



3.11 3.11

3.12 3.12 4


Description

Requirement

Need

Testing D 018, Sheets 15-16

If a fixed fire fighting system then function test needed in last six months, if portable a visual examination and check of fill level needed

A

Inst Instru rume ment ntat atio ion n

A gau gauge ge ind indic icat atin ing g int inter erna nall pres pressu sure re of of the the mai main n com compa part rtme ment nt to to the the occupants is needed

A

Calibration D 018, Sheets 18-20

Such a gauge must have been examined and compared with a test instrument in the last six months.

A

Atmo Atmosp sphe here re Cont Contro roll

A scr scrub ubbe berr may may be be fitt fitted ed to rem remov ove e CO CO2 from the atmosphere

C

Testing

Any scrubber should be function tested in the last six months

A

Cont Contro roll Pane Panell

4.1

General

The ma main co controls fo for th the ch chamber sh should be be gr grouped to together, located at a convenient place.

B

4.2 4.2

Brea Breath thin ing g Appa Appara ratu tus s

Brea Breath thin ing g Appa Appara ratu tus s (BA) (BA) fitt fitted ed with with comm commun unic icat atio ions ns shou should ld be available for the operator in the event of fire or fumes.

A


BA set sets s to to be be ex examin amine ed and and func functi tion on test tested ed in the the las lastt six six month onths s

Gauges Gauges

Suitab Suitable le gauges gauges should should be provid provided ed to indica indicate te the pressu pressure re inside inside each compartment. Gauges should also indicate incoming gas supply pressures

Calibration D 018, Sheet 18 & 19

Gauge auges s sho shoul uld d be be exa exami mine ned d and and calib alibrrated ated in th the las lastt six six mont months hs

Analys Analysis is

A means means should should be availa available ble of analys analysing ing the oxygen oxygen and carbon carbon dioxide content of the ambient atmosphere in each compartment. This may be chemical tubes for the CO2 analysis.

A

Testing D 018, Sheet 1 & 2

Suitable analysers should have been calibrated in the last six months. The pump for disposable tube types should be tested in the last six months.

A

Pipe Pipew work, ork, Valv Valves es and and Regulators

Valv alves and regul egulat ator ors s to be free free of cor corrosi rosion on and and oper opera ate easi easily ly

4.3

4.4

4.5 4.5

A A

A

A

The function of all controls (valves, regulators etc.) should be clearly marked for function

A


A

Response




Description

Requirement


Valves and pipework need visually examined in last six months


Need

A

A

Response


Section 4 – Diver Launch and Recovery System Page 1 of 4


Diver Launch and Recovery System This section should be considered along with the section on Diving Basket (or W et Bell) as there is an interface point between the sections. Item

1

Description

Requirement

Need

General

1.1

Weight

The we weight of of th the di diving ba basket (o (or we wet be bell) in in ai air, fu fully eq equipped wi with equipment and divers divers is _____ kg.

1.2

Marking

The safe working lo load (SW L) must be be cl clearly ma marked on on ev every wi winch and on the A frame or similar.

A

1.3

Suitability

Each of of th these SW SW Ls Ls mu must be be gr greater to to or or eq equal th the we weight of of th the fu fully equipped diving basket (or wet bell) in air.

A

2

ManMan-Ri Ridi ding ng Winc Winche hes s

2.1

Suitability

Only wi winches de deemed su suitable fo for ma man ri riding by by th the ma manufacturer (o (or a competent person) should be used

A

2.2 2.2

Oper Operat atin ing g Lev Lever er

The The win winch ch rais raise/ e/lo lowe werr con contr trol ol must must be desi design gned ed to retu return rn to the the neu neutr tral al position when released by the operator.

A

2.3

Marking

The ra raise, lo lower an and ne neutral po positions of of th the op operating le lever mu must be be clearly marked

A

2.4

Main Brake

An au a utomatic br brake mu must be be fi f itted wh which wi will co c ome on o n wh when th t he operating lever is returned to the neutral position or if there is a loss of power to the winch.

A

2.5 2.5

Seco Second ndar ary y Brak Brake e

A seco second ndar ary y brak brakin ing g sys syste tem m must must als also o be fit fitte ted d for for use use in case case the the main brake fails

A

2.6

Clutch

If any sort of clutch mechanism is fitted to the winch, there must be a positi positive ve means means of preven preventin ting g it becomi becoming ng diseng disengage aged d during during operation.

A

2.7

Operating Instructions

A notice giving the operating instructions for the winch, including the actions actions necessary if power power is lost, should should be displayed where the winch operator can see it.

A

2.8 2.8

Seco Second ndar ary y Pow Power er

An ind indep epen ende dent nt (se (seco cond ndar ary) y) pow power er sou sourc rce e must must be be avai availa labl ble e in cas case e of failure of the primary power.

A

Response


Section 4 – Diver Launch and Recovery System Page 2 of 4


Item

Description

Requirement

2.9 2.9

Dru Drum Cap Capacit acity y

The The win winch ch drum drum must ust be be abl able e to to acc accep eptt th the ful fulll len leng gth of wire ire bei being ng used. Unless special guards are in use, this means that there should be a clear space between the outside of the top layer of wire and the edge of the drum flange of at least 2.5 times the wire diameter

A

2.10

Guarding

Unless ac access is is ph physically re restricted, gu guards sh should be be fi fitted to to th the winch and drum to stop anything (clothing, fingers etc) being drawn in to the machinery.

B

2.11 2.11

Breath Breathing ing Appara Apparatus tus

Emerge Emergency ncy Breath Breathing ing Appara Apparatus tus,, fitted fitted with with commun communica icatio tions, ns, must must be available for the winch driver. If umbilical supplied, any air intakes for the supplying compressor must be in a pollution free area.

A


Visual examination and function test (including comms if fitted) in last 6 months. Check made at same time that cylinder is fully charged

A

External External visual examination examination of cylinder plus gas leak test to max. working pressure in last 2½ years

A

Internal and external visual examination of cylinder plus gas leak test to max. working pressure in last 5 years. (Possible overpressure test)

A

3

Need

Main Main Lift Lift Wire Wire

3.1

Type

The lift wire should be non-rotating

3.2

Connection

The co connection of of th the wi wire to to th the ba basket (o (or we wet be bell) mu must be be of of a suitable type. It should have two retaining means (such as castellated nut locked with split pin) for the removable pin

A

A

3.3

Lubrication

Unless th the wi wire is is to to be be re renewed ev every tw two ye years, it it sh should be be pressure lubricated every 6 months

B

3.4


Static test at 1.25 times SWL plus function test at SWL in last 6 months. Visual examination of visible section at same time

A

Cut back rope beyond first sheave and test to destruction to prove safety factor in last 12 months

A

Reterminate and apply static load test at 1.5 times SWL in last 12 months

A

Response


Section 4 – Diver Launch and Recovery System Page 3 of 4 Item

4

Description

Requirement


Need

Seco Second ndary ary Reco Recove very ry

4.1

Provision

There mu must be be a secondary me means of re recovering th the di diving ba basket (o (or wet bell) bell) to the surfac surface e and bringin bringing g it on board. board. This This must must be independent of the main recovery system

A

4.2

SW L

The secondary recovery system must have a certified SW L which is at least equal to the weight of the fully loaded basket (or wet bell) in air (see 1.1 above) or in water if it is only used to bring the basket (or wet bell) to the surface.

A

If the secondary recovery system has another use (for example guide weight deployment) then it must have a certified SWL covering at least the weight required above PLUS its main task.

A

Where a winch is is us used fo for se secondary re recovery to to th the de deck itit mu must meet all of the man riding requirements given in 2.1 to 2.11 above

A

Where a wire rope is used for secondary recovery to the deck, it must meet the requirements of the main lift wire in 3.1 to 3.4 above. (note, certain configurations, such as double reeving through a guide weight, may not require the use of non rotating wire)

A

4.3

5

Man Riding

Comm Commun unic icat atio ion n

5.1

General

The Di Diving Su Supervisor mu must ha have a means of of ve verbal co communication to/from the winch driver. Where practical this should be hard wired

A

5.2


The communications must have been function tested in the last 6 months

A

6

Over Overal alll Test Testin ing g

6.1

General

It is is no normal th that th the la launch/recovery sy system is is lo load te tested as as a complete unit rather than as individual units. This should happen at the intervals given below but also if the unit is relocated or any of the major components are replaced, altered or repaired. The certificate for the overall test should state clearly all the component parts which were tested.

6.2


Visual examination and function test of complete system at maximum SWL. Independent static load test on each brake system at 1.25 times max. SWL in last 6 months

A

Independent static load test on each brake system at 1.5 times max. SWL followed by NDT of critical areas in last 12 months

A

Response


Section 4 – Diver Launch and Recovery System Page 4 of 4 Item

7 7.1


Description

Requirement

D 018, Sheet 22.2

Need

Hydraulic fluid/oil analysis carried out OR fluid/oil replaced in last 12 months. (if system is hydraulically operated)

A

A su surface st standby di diver mu must be be pr provided wi with a suitable me means of of entry to and exit from the water in the event that he is required to perform a rescue. If this involves the use of a mechanical handling system, basket etc. then the system for the standby diver must meet the same requirements as that for the working diver.

A

Stan Standb dby y Dive Diver r General

Response


Section 5 – Diving Basket Page 1 of 2


Diving Basket Item

Description

1

General

1.1

Location

1.2

Structure

Requirement

The basket must be located such that it is easy for the diver(s) to to get in and out as well as to remove an unconscious diver from the basket to the deck.

A

If diving is to take place at night, the deck and launching area in the vicinity of the basket must be well illuminated

A

Paint work should be in good condition

B

The structure should be free from excess corrosion

A

Should be able to carry two divers comfortably

A

Should have a gate or chain to prevent divers falling out

A

Must be fitted with suitable internal hand holds for divers

1.3

Lifting

2 2.1


A

Should be fitted with protection at the top to prevent injury to the divers from dropped objects

A

There mu must be be a se secure po point to to at attach th the lift wi wire to to. This can be be a pad-eye, a shackle point or a captive ring

A

There must be a suitable place to attach a secondary lift wire if the main lift point fails. (The secondary lift wire does not need to be fitted)

B

The SWL should be clearly marked on the basket 1.4

Need

A

Visual examination of Structure and Lift Point in last six months for damage/corrosion

A

Load test at 1.25 times SWL with MPI of lifting point or pad eyes after test in last 12 months

A

There sh should be be on one (o (or mo more) em emergency ai air cy cylinder fifitted in in th the basket and securely mounted

A

It should be fitted with a contents gauge (indicating type only) and a first stage regulator

A

Emer Emerge genc ncy y Cyli Cylind nder er Cylinder

Response


Section 5 – Diving Basket Page 2 of 2 Item

2.2

Description



Requirement

Need

There There should should be a facili facility ty to provid provide e the diver with a SCUBA SCUBA mouthpiece and a valved flexible hose connection for air supply (or other suitable set up)

A

The cylinder cylinder should should be colour colour coded for breathin breathing g air, air, have have the contents permanently marked on it and have the last test date stamp marked with a small patch of distinctive colour to aid its location

A

External visual examination in last 6 months

A

Internal Internal and external external examination examination plus gas leak test to maximum maximum working pressure in last 2 years

A

Hydraulic overpressure test to 1.5 times maximum working pressure followed by the 2 yearly tests above, within the last 4 years

A

D 018, Sheet 20

Visual examination and function test of pressure indicating gauge in last 6 months

A

D 018, Sheet 24.1

Visual examination of pipework/fittings in last 6 months Gas leak test of pipework and fittings at maximum working pressure in last 2 years

A A

Response


Section 6 – Wet Bell Page 1 of 3


Wet Bell Item

Description

1

General

1.1

Location

1.2

Structure

Requirement

The wet bell must be lo located such that it is easy for the diver(s) to to get in and out as well as to remove an unconscious diver from the wet bell to the deck.

A

If diving is to take place at night, the deck and launching area in the vicinity of the wet bell must be well illuminated

A

Paint work should be in good condition

B

The structure should be free from excess corrosion

A

Shou Should ld be able able to carr carry y at at lea least st two two div diver ers s in in an an unc uncra ramp mped ed posi positi tion on

A

Should have a gate or chain to prevent divers falling out

A

Must be fitted with suitable internal hand holds for divers

1.3

1.4

Lifting


2

A

Needs a suitable means for supporting an unconscious diver with his head in the air space

A

There mu must be be a suitable se secure po point to to at attach th the lilift wi wire to to. Th This can be a pad-eye, a shackling point, a captive ring or similar.

A

There must be a suitable place to attach a secondary lift wire if the main lift point fails. (The secondary lift wire does not need to be fitted)

A

Visual examination of Structure and Lift Point in last six months for damage/corrosion

A

Load test at 1.25 times SWL with MPI of lifting point or pad eyes after test in last 12 months

A

The SWL should be clearly marked on the wet bell 2.1

Need

A

Air Cyli Cylind nder er(s (s)) Cylinders

There sh should be be tw two (o (or mo more) ai air cy cylinders fifitted to to th the we wet be bell an and securely mounted

A

The cylinders cylinders should should be colour coded for breathin breathing g air, have the contents permanently marked on it and have the last test date stamp marked with a small patch of distinctive colour to aid its location

A

Response


Section 6 – Wet Bell Page 2 of 3


Item

Description

Requirement

2.2


Cylinder external visual examination in last 6 months

3

Need

A

Internal Internal and external external examination examination plus gas leak test to maximum maximum working pressure in last 2 years

A

Hydraulic overpressure test to 1.5 times maximum working pressure followed by the 2 yearly tests above, within the last 4 years

A

Air Supp upplies lies

3.1

Sources

Sufficient sources of air (or gas) of breathing quality must be available and suitably arranged so that if the on line supply to the diver fails, an alternative supply can be immediately switched on

A

3.2 3.2

To the the Dive Diverr(s) (s)

The The air air suppl upply y to to eac each h div diver er must must be arra arrang nged ed such uch tha thatt if if one one lin line fails then this does not interfere with the supply to another diver

A

3.3

In W at ater Standby Diver

There must be a primary air supply to the in water standby sufficient to allow him to rescue an injured diver and arranged to be separate from the main supply to the working diver(s). diver(s). This may come from the cylinders on the wet bell.

A

There must be a secondary back up supply to the standby diver but this may be common with the working diver(s) main supply, provided it is protected from any malfunctions

A

Cylinders sh should be be va valved an and connected up up in such a way that this onboar onboard d air supply supply is availa available ble to the divers divers as back-u back-up p or for blowdown of the enclosed top section.

A

The system should be fitted fitted with a contents gauge(s) (indicating type only)

A

Visual examination and function test of pressure indicating gauge in last 6 months

A

4

Outf Outfit itti tin ng

4.1

Pipework

4.2

4.3

Testing D 018, Sheet 20 D 018, Sheet 24.1

Lighting

Visual examination of pipework/fittings in last 6 months

A

Gas leak test of pipework and fittings at maximum working pressure in last 2 years

A

Should be fitted with su sufficient lighting to allow the divers to see and operate all controls

B

Response


Section 6 – Wet Bell Page 3 of 3 Item

4.4

5 5.1


Description

Requirement

Need


Lights, cables etc. have had visual examination, function test plus continuity and resistance tests in last 6 months

A

Gauges

If th the we wet be bell is is us used fo for de decompression th then a suitable de depth ga gauge should be provided

B

Testing D 018, Sheet 18 or 19 (as appropriate)

Visual Visual examinatio examination n and calibration calibration of any gauge to the required standard in the last 6 months

A

The wet be bell sh should be fifitted wi with a main supply um umbilical ca carrying al all necessary air/comms/ power/etc. to the bell. (see separate section for details of umbilical system)

A

Main Main Umbi Umbili lica call Fitting

Response


Section 7 – Wet Bell Main Umbilical Page 1 of 2


Wet Bell Main Umbilical Item

Description

Requirement

Need

1

General

1.1

Suitability

The um umbilical mu must be be su suitable fo for th the in intended us use. Th This me means itit must be robust and able to be handled by the intended deployment system. It must also contain a sufficient number and diameter of hoses and cables to provide all supplies safely at the maximum depth to which it will be used.

A

1.2

Handling

The deployment sy system sh should be ab able to to ha handle th the um umbilical in in su such a way that it is not exposed to damage

A

The um umbilical sh should be be se securely at attached to to th the we wet be bell by by me means of of a streng strength th member member or strain strain relief relief fitting fitting so that that the individu individual al connections are not subject to load

A

The leads of the hoses and cables at the wet bell end should be arranged to avoid chafing or kinking

A

If an umbi umbili lica call win winch ch is used used then then it shou should ld be fitt fitted ed with with a mec mecha hani nica call braking system to stop the umbilical paying out under load when the winch motor is in use (over running), in neutral or at rest.

B

2 2.1

3 3.1 3.1

4

Fitting Attachment

Umbi Umbili lica call Winc Winch h Brak Brakin ing g Syst System em

Testing

4.1

Electrical components D 018, Sheet 11

Visual Visual examinatio examination, n, function function test, continuity continuity and resistance resistance testing carried out in last 6 months

A

4.2

Hose Components D 018, Sheet 28

When new or first installed, installed, hydro test to 1.5 times max. working pressure or as recommended

A

5

Visual examination and function test in last 6 months

A

Pressure leak test to max. working pressure in last 2 years

A

Spare – If a spare umbilical is carried offshore then it should be: Tested and certified as in 4 above

A

Response


Section 7 – Wet Bell Main Umbilical Page 2 of 2 Item

Description


Requirement

Stor Stored ed offs offsho hore re in suit suitab able le cond condit itio ions ns,, manufacturer’s instructions

Need

norm normal ally ly as per per

the the

Pres Pressu sure re leak leak test tested ed (and (and flus flushe hed d thr throu ough gh if nece necess ssar ary) y) befo before re use use 6

B A

Seco Second ndary ary Reco Recove very ry The umbilical should only be used as a means of secondary recovery if it is specifically designed for that purpose. If so it must be tested in line with the requirements in the handling system section

A

Response


Section 8 – Diver Heating System Page 1 of 3


Diver Heating System It is self evident that this section will only apply to a diving system that uses hot water for diver heating. Item

Description

1

General

1.1

Suitability

2

Redu Redund ndan ancy cy

2.2

Requirement

3

Requirement

Need

The eq equipment us used to to ge generate an and su supply th the ho hot wa water to to th the di diver should be suitable for the purpose

A

W he hether th there is is a ne need fo for ba back-up po power an and ho hot wa water wi will de depend on whether the diver can be safely recovered to the surface in the even eventt of loss loss of heat heatin ing. g. This This shou should ld be stat stated ed in the the divi diving ng contractor’s operating procedures

B

If redundancy is required, there must be two alternative sources for supplying heat to the diver

A

If redundancy is required, and if electricity is required to generate heating or pump it to the diver then there should be a back-up system in the event of primary failure.

A

Tem Tempera peratu ture re

3.1

Monitoring

The Di Diving Su Supervisor mu must ha have a di display sh showing th the te temperature of the water being supplied to the diver

A

3.2

Alarm

A Hi-Lo temperature alarm must be fitted to alert the Diving Supervisor of pre-set upper and lower limits are exceeded

A

Oil fifired he heaters sh should be be lo located su such th that th they pr present no no ririsk to to th the dive system in the event of fire

A

Their position position should also present present no risk in terms of pollution or contamination of air supply intakes

A A

4 4.1

OilOil-Fi Fire red d Heat Heater ers s Location

4.2

Spill Tray

They should be f ititted with a spill tray which drains off to a safe area (to reduce risk of fire or pollution)

4.3

Fuel Supply

Where possible the fuel supply should be hard piped

B

The local tank filler filler should should be fitted fitted with a dead-m dead-mans ans handle handle or automatic shut off valve which closes when the tank is full

B

Response


Section 8 – Diver Heating System Page 2 of 3 Item

Description


Requirement

The local tank must be fitted with an overflow system with a capacity greater than the filling supply system (i.e. capable of allowing a rate of overflow greater than the filling rate) The overflow system must dump to a safe area 5

Need

A

A

Fire Firefi figh ghti ting ng

5.1

Provision

All ho hot wa water ma machines ne need to to ha have su suitable pr provision of of fi fire fifighting equipment in their vicinity. This may be the normal ships or platforms equipment or dedicated equipment. The type must be suitable, it must be easy to access and large enough to be sufficient

A

5.2

Fire Detection

If a ny ny h ot ot w at ater m ac achines a re re s itituated i n en enclosed a nd nd u nm nmanned areas then consideration should be given to fitting a fire detection system

C

5.3

Testing Examination and test of fire fighting equipment as appropriate in last 6 D 018, Sheet 15 & 16 months

A

6

Testing

6.1 6.1

Func Functi tion on Test est of Hot Hot Water System D 018, Sheet 21


6.2

Pipe work D 018, Sheet 24.1

Pressure Pressure test to 1.5 times maximum maximum working working pressure pressure when first installed

A

A

Visual examination in last 6 months

A

Gas Gas (or (or flu fluid id)) leak leak tes testt at at maxi maximu mum m wor worki king ng pre press ssur ure e in in last last 2 year years s

A

6.3

Gauges D 018, Sheet 20

Visual examination and function test of any indicating gauges in last 6 months

A

6.4

Electrical D 018, Sheet 11

Visual examination, function test, continuity and resistance tests of all electrics in last 6 months

A

6.5

Pressure Ve Vessels D 018, Sheet 9.2

External visual examination in last 6 months Internal Internal and external external examination examination plus gas (or fluid) fluid) leak test to maximum working pressure in last 15 months

A A

Response


Section 8 – Diver Heating System Page 3 of 3 Item

Description


Requirement

Internal and external examination plus over pressure test to 1.5 times maximum working pressure plus gas (or fluid) leak test to maximum working pressure in last 5 years

Need

A

Response


Section 9 – Divers’ Umbilicals Page 1 of 2


Divers’ Umbilicals This section applies to both excursion umbilicals used with a wet bell and to surface diving umbilicals but does not apply to a wet bell main umbilical, which has its own separate section. Item

1

Description

Requirement

Need

General

1.1 1.1

Cons Constr truc ucti tion on

The The umb umbiilica licall(s) (s) sho shoul uld d be be sui suita tabl ble e fo for th the tas tasks ks int intende ended d. The They y sho shoul uld d be robust and made up from components designed for use in an umbilical.

A

1.2

Stowage

Adequate um umbilical st stowage sh should be be pr provided. Th This sh should al allow th the umbilical to be coiled up away from risk of damage and such that minimum bend radius of components is not compromised

B

1.3

Marking

Umbilicals should be marked for length at least every 10 metres using a recognised system which allows easy visual identification of the length paid out

A

1.4

Security

The di divers en end of of th the um umbilical sh should be be fifitted wi with a means wh which allows it to be securely fastened to the diver’s safety harness without putting any strain on the individual whip ends

A

2

Length The The len lengt gth h of of the the dive diver’ r’s s umb umbil ilic ical al whic which h itit is is per permi miss ssib ible le to pay pay out out will will normally normally be dictated dictated by some outside factor such as the bail-out endurance endurance (depending (depending on depth/dist depth/distance) ance) or the distance to the nearest thruster on a DP vessel. This maximum length should be clearly identified for each diving operation and arrangements should preferably preferably be made to ensure ensure that this is the maximum maximum length of umbilical which can be paid out.

A

The standby divers umbilical should be 2 metres (6 feet) longer than the working diver(s) umbilical.

B

Visual Visual examinatio examination, n, function function test, continuity continuity and resistance resistance testing carried out in last 6 months

A

2.1 2.1

3 3.1

Reco Record rd of Leng Length th

Testing Electrical components D 018, Sheet 11

Response


Section 9 – Divers’ Umbilicals Page 2 of 2


Item

Description

Requirement

3.2

Hose Components D 018, Sheet 28

When new or first installed, installed, hydro test to 1.5 times max. working pressure or as recommended

Need

A


A

Pressure leak test to max. working pressure in last 2 years

A

Response


Section 10 – Divers’ Personal Equipment Page 1 of 2


Divers’ Personal Equipment This section covers divers’ helmets (or masks), bail-out bottles and other parts of the diver’s emergency breathing supply. It does not cover other items such as suits, harnesses, gloves etc. which should meet normal standards for personal protective equipment. Item

1

Description

Requirement

Need

Helm Helmet ets s (or (or Mask Masks) s)

1.1

Marking

Each helmet (or mask) should be indelibly marked with a unique serial number

B

1.2

Condition

All he helmets (o (or ma masks) sh should be be in in go good co condition wi with no no ob obvious defects

A

1.3

Type

The helmet (o (or mask) should be of a type which is suitable for the intended diving operation

A

1.4

Safety

Helmets must be fitted with a means to stop them becoming detached from their clamp while in use

B

1.5

Maintenance

Each helmet (or mask) must be subject to regular planned maintenance and a record of such maintenance should be available

A

1.6 1.6

Impa Impact ct Prot Protec ecti tion on

Dive Divers rs wor worki king ng in in the the spla splash sh zon zone, e, or or clos close e to the the sur surfa face ce,, who who are are NOT wearing a rigid helmet should be provided with head protection. This will also apply to the standby.

A

1.7


Visual examination and function test at atmospheric pressure in last 6 months

A

2

Bail Bail-O -Out ut Cyli Cylind nder ers s

2.1

Provision

Every di diver, in including th the st standby, mu must be be pr provided wi with a reserve supply of air carried in a bail-out cylinder

A

2.2

Endurance

The cy cylinder(s) mu must ha have su sufficient en endurance to to al allow th the di diver to to return to a place of safety. This will normally mean that a calculation should be available showing that the capacity of the cylinder(s) at the depth of diving will allow breathing air for 1 minute for every 10 metres horizontal horizontal excursion excursion plus (if using surface umbilicals) umbilicals) 1 minute minute for every 10 metres of depth

B

2.3

Marking

Each cy cylinder sh should be be co correctly co colour co coded an and ma marked wi with th the name of the contents.

A

Response


Section 10 – Divers’ Personal Equipment Page 2 of 2 Item

2.4

3

Description


Requirement


Need

The last hydraulic test date stamp should be highlighted with a small patch of distinctive colour paint

B

External and internal visual examination in last 6 months

A

Extern External al and intern internal al visual visual examin examinati ation on plus plus gas leak leak test test to maximum working pressure in last 2 years

A

Hydraulic overpressure test to 1.5 times maximum working pressure in last 4 years

A

Response


Whip Whips s and and Conn Connec ecto tors rs – – The above two sections cover the the mask/helmet and the bail-out cylinder. This This section covers the connections between between these items and other parts of the divers emergency breathing system.

3.1

Provision

Suitable co connections, fi fittings et etc. mu must be be pr provided to to al allow th the ba bailout cylind cylinder er to supply supply emerge emergency ncy breath breathing ing air to the diver’ diver’s s mask/helmet if needed

A

3.2

Condition

All wh whips, ho hoses, ga gauges, fi fittings et etc. mu must be be in in go good co condition wi with no obvious defects

A

3.3

Type

All hoses, fittings, whips, gauges etc must be of a suitable type and pressure rating for the purpose. In particular, care should be taken to ensure that items of lower pressure rating than required are not used. This is particularly important for the first stage regulator.

A

3.4

Maintenance

All it items fo forming pa part of of th the di diver’s em emergency ai air su supply sy system should be subject to regular inspection and maintenance. Records of such maintenance should be available.

A

3.5


Visual examination and function testing at full working pressure in the last six months

A

Pressure leak test to maximum rated working pressure

A

Section 11 – Compressors Page 1 of 3


Compressors Item

Description

Requirement

1.1

Location

All compressors sh should be be located in in a su suitable area. Th This means that any personnel working on the compressor should not be exposed to any hazard while doing so.

A

Similarly Similarly the compressor compressor itself should be protected protected from obvious obvious physical damage.

A

The intakes of all compressors should be sited in an area where they are not exposed to any pollution – particularly exhaust fumes.

A A

1.2

Access

The co compressor sh should be be ea easily ac accessible to to di diving pe personnel, bo both for routine maintenance and in an emergency

1.3

Suitability

Each compressor must be suitable for the purpose it will be used for.

1.4

Instructions

Detailed o pe perating i ns nstructions f or or e ac ach c om ompressor should b e available

1.5 2

Signs

Need

A A

Wher Where e poss possib ible le these hese shoul hould d be be vis visib ible le besid eside e eac each h com compr pres esso sorr

C

If appropriate, there should be warning signs stating that a compressor may start or blow down automatically and care should be taken

B

Each Each comp compre ress ssor or shou should ld have have a deta detail iled ed plan planne ned d main mainte tena nanc nce e schedule showing what work has to be done at which intervals

A

Main Mainte ten nance ance

2.1 2.1

Plan Planne ned d Main Mainte tena nanc nce e

2.2

Records

Detailed records should be kept of all maintenance activities

2.3

Filters

All fifilters sh should be be ch checked at at re regular in intervals an and ei either cl cleaned or or replaced.

A

The date of the last inspection of each filter should be clearly visible on it along with the date when its next service is due.

B

All co compressors ne need to to ha have su suitable pr provision of of fi fire fi fighting equipment in their vicinity. This may be the normal ships or platforms equipment or dedicated equipment. The type must be suitable, it must be easy to access and large enough to be sufficient

A

3 3.1

A

Fire Firefi figh ghti ting ng Provision

Response


Section 11 – Compressors Page 2 of 3


Item

Description

Requirement

3.2 3.2

Fire Fire Detec etecti tion on

If any any comp compre res ssors sors are are sit situa uate ted d in in enc enclo los sed and and un unmann manned ed area areas s th then consideration should be given to fitting a fire detection system

B

3.3


A

4

Need

Safe Safety ty Devi Device ces s

4.1 4.1

Sole Soleno noid id Swit Switch ches es

Sole Soleno noid id swi switc tche hes s may may be fitt fitted ed to to auto automa mati tica call lly y stop stop the the com compr pres esso sor r if it overheats. An alarm for this may be fitted in dive control.

C

4.2

Cracked Plate Detector

A diaphragm type compressor should be fitted with a cracked plate detector which will automatically stop the compressor in the event of failure

A

4.3

Relief Valves

A re relief v al alve s ho hould b e fifitted to to a ny ny pr pressure c on ontainer (e (eg.an a irir receiver) if it is could be over pressured

B



A

Function test at required relief setting followed by gas leak test at maximum working pressure in last 2½ years

A

5

Pipework

5.1

Suitability

All pi pipe wo work (r (rigid or or flflexible), va valves, fi fittings et etc sh should be be su suitable fo for the purpose, properly installed and protected from damage.

A

5.2



A

6


A

Gas leak test at maximum working pressure in last 2 years

A

Air Rece Receiv iver ers s

6.1

Suitability

All ai air re receivers mu must ha have be been ma manufactured to to a re recognised international code or standard and be fit for the purpose they will be used for.

6.2


Visual examination in last 6 months Internal Internal and external external inspection inspection plus gas leak test to full working working pressure pressure OR Internal Internal overpressure overpressure test plus gas leak test to full working pressure in last 2½ years

A

A A

Response


Section 11 – Compressors Page 3 of 3 Item

Description

7

Electrics


Requirement

Need

7.1

Integrity

All el e lectrical su s upplies sh s hould be b e p ro roperly co c onnected u si sing su s uitable equipment

A

7.2


Visual examination, function test plus continuity and resistance tests in last 6 months

A

8

Oper Operat atio iona nall Test Testin ing g

8.1

General D 018, Sheet 7

Visu Visual al exam examin inat atio ion n and and func functi tion on test test of comp compre ress ssor or in last last 6 mont months hs

A

8.2

Output D 018, Sheet 7

Check of delivery rate and pressure in last 6 months

A

8.3

Purity D 018, Sheet 7

Check of output purity in last 6 months

A

Response


Section 12 – HP Air and Gas Storage Page 1 of 2


HP Air and Gas Storage This section refers to any bulk high pressure gas or air storage storage which forms part of the air diving system. This will include HP air storage banks or quads, HP oxygen oxygen storage quads and any treatment gas storage. Since it is not envisaged that any gas mixes other than compressed natural air might be stored in enclosed compartments, no requirements are listed below for this eventuality. Item

Description

Requirement

Need

1

General

1.1

Quantity

There mu m ust be b e su s ufficient su s upplies av a vailable to t o co c omply wi w ith th t he requirements of AODC 014.

A

1.2

Location

All HP HP st storage sh should be be lo located in in a suitable pl place wh where th there is is a minimal risk of damage occurring.

A

Oxygen (or mixes containing over 25% oxygen) must be stored in the open and well clear of any fire hazards

A

Cylinders an and qu quads mu must be be co colour co coded an and ma marked wi with th the na name and chemical symbol of the contents in accordance with AODC 016 (Rev 1)

A

The latest test date stamped on the cylinders should be highlighted with a small patch of distinctive colour

B

Each cy cylinder sh should be be in in go good co condition an and fr free fr from se serious corrosion

A

1.3

1.4 2 2.1

2.2

Marking

Condition Testing Cylinders D 018, Sheet 9.1

Pipe Wo Work, Va Valves etc D 018, Sheet 24.1 & 24.2

External visual examination in last 6 months

A

External visual examination and gas leak test to maximum working pressure in last 2½ years

A

Internal and external visual examination and gas leak test to maximum working pressure in last 5 years (possible over pressure test to 1.1 times max working pressure)

A


A

Internal cleanliness verified to appropriate standard

A

Response


Section 12 – HP Air and Gas Storage Page 2 of 2 Item

2.3

3

Description

Lifting E qu quipment (Quad Slings etc) D 018, Sheet 23


Requirement

Need


A

Gas leak test at maximum working pressure in last 2 years

A


A

Load test at 1.5 times maximum SWL in last 12 months

B

Fire Firefi figh ghti ting ng

3.1

Provision

All HP HP ga gas or or ai air st storage ne needs to to ha have su suitable pr provision of of fi fire fighting equipment in the vicinity. This may be the normal ships or platforms platforms equipment equipment or dedicated dedicated equipment. equipment. The type must be suitable, it must be easy to access and large enough to be sufficient

A

3.2

Fire Detection

If a ny ny HP HP g as as or or a irir st storage i s si situated i n en enclosed a nd nd u nm nmanned areas then consideration should be given to fitting a fire detection system

C

3.3


A

4 4.1

5

Gas Gas Cont Conten entt Stat Status us State Boards

A re record sh should be be ke kept in in a de designated pl place of of th the co contents an and pressure of each cylinder or quad. These records should be updated daily when the system is in use.

A

This record should also show clearly the minimum quantities required from 1.1 above

B

Oxygen

5.1

Signs

Fire ha hazard wa warning si signs sh should be be er erected in in th the vi vicinity of of an any stored oxygen

A

5.2

Pressure

The pr pressure of of ox oxygen sh should be be re regulated do down at at th the qu quad or or cylinder to a maximum of 50 bar (750 psi)

B

5.3

Pipe Work

Oxygen s ho hould b e ha hard p ip iped w he herever p os ossible. O nl nly f le lexibles compatible with oxygen should be used and they should be kept as short as possible

B

Response


IMCAD023 CODE

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