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Håndbok Handbook BEST BESTEPRACTICE PRAKSIS DROPPED OBJECT OBJEC T FOREBYGGING AV PREVENTION FALLENDE GJENSTANDER
Rev. Rev. 03-201 03-20
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Foreword
Dropped objects (DO) present significant safety challen Surveys have shown that these challenges relate to a numbe factors, including work processes, behaviour, design, and the sufficient securing of equipment.
As an improvement measure, Working Together for Safety (S decided to issue this handbook, which summarises relevant quirements relating to the securing of tools, *fixed and mov equipment.
The handbook was originally produced by Statoil, in close c laboration with equipment suppliers and users. An SfS work group, with members from both operators and suppliers, has b responsible for the revisions made to this edition. The purpos the handbook is to disseminate knowledge and best practice to entire industry – we shall not have dropped objects in our indus
Two fundamental concepts in all HSE work are an understand of risk and a barrier-based approach. Risk includes both proba ity and consequences. The probability that a DO will occur can significantly reduced through good design and the establishm of the barriers described in this handbook. The consequences also be reduced through good design and planning: Low-we equipment placed at low heights and away from walkways res in reduced risk through reduced consequences.
SfS would like to thank Statoil for taking the initiative to cr Masterthis your semester Scribd everyone handbook, andwith encourages toFree useForiton30this actively in o Read Days Sign up to vote title & The New York Times Useful Not useful to understand and establish the necessary barriers. We would a Special offer for students: Only $4.99/month. like to thank DOM Group AS for their assistance with images Cancel anytime.
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Foreword
Dropped objects (DO) present significant safety challen Surveys have shown that these challenges relate to a numbe factors, including work processes, behaviour, design, and the sufficient securing of equipment.
As an improvement measure, Working Together for Safety (S decided to issue this handbook, which summarises relevant quirements relating to the securing of tools, *fixed and mov equipment.
The handbook was originally produced by Statoil, in close c laboration with equipment suppliers and users. An SfS work group, with members from both operators and suppliers, has b responsible for the revisions made to this edition. The purpos the handbook is to disseminate knowledge and best practice to entire industry – we shall not have dropped objects in our indus
Two fundamental concepts in all HSE work are an understand of risk and a barrier-based approach. Risk includes both proba ity and consequences. The probability that a DO will occur can significantly reduced through good design and the establishm of the barriers described in this handbook. The consequences also be reduced through good design and planning: Low-we equipment placed at low heights and away from walkways res in reduced risk through reduced consequences.
SfS would like to thank Statoil for taking the initiative to cr Masterthis your semester Scribd everyone handbook, andwith encourages toFree useForiton30this actively in o Read Days Sign up to vote title & The New York Times Useful Not useful to understand and establish the necessary barriers. We would a Special offer for students: Only $4.99/month. like to thank DOM Group AS for their assistance with images Cancel anytime.
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Table T able of contents contents
FOREWORD ................................................................................. THE PURPOSE OF THIS HANDBOOK ........................ .................................... ............ ABBREVIATIONS ABBREVIA TIONS / TERMS ........... ....................... ........................ ........................ ...................... .......... PART 1: GENER GENERAL AL INFORMATION ............ ........................ ........................ .................. ......
CHAPTER 1: THE MOST IMPORT IMPORTANT ANT AREAS – WHERE DO DROPPED OBJECTS OCCUR?.... CHAPTER 2: BARRIERS............ ........................ ........................ ........................ ........................ ............
CHAPTER 3: FALL ENERGY AND FALL FACTORS ........... ................ .....
CHAPTER 4: ROUTINES FOR WORK AT HEIGHT ............ .................. ......
CHAPTER 5: SECURING TOOLS AND EQUIPMENT DURING WORK AT HEIGHT ........... ....................... .................... ........ 5.1: Securing tools <5 kg ........... ....................... ........................ .................. ...... 5.2: Securing tools >5 kg ........... ....................... ........................ .................. ...... 5.3: Securing other portable equipment ........... ................... ........ 5.4: Securing equipment and parts ............ ........................ ............ 5.5: Tool Tool cabinets for for work at height ........... ....................... ............ CHAPTER 6: SECURING PERSONNEL ........... ....................... ........................ ............ CHAPTER 7: SECURING TOOLS AND EQUIPMENT AGAINST AGAINS T WIND AND WEA WEATHER THER Master your semester with Scribd CONDITIONS ....................... ........... ........................ ....................... ...................... Read Free Foron 30 Days Sign up to vote this title ...........
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PART 2: SECURING FIXED EQUIPMENT ............ ....................... .................... .........
CHAPTER 13: BOLTED BOLTED CONNECTIONS CONNECTIONS........... ...................... ....................... ............... ... 13.1: Nord-Lock bolt securing system ............ .................... ........ 13.2: Spiralock ........... ....................... ........................ ........................ ...................... .......... 13.3: Castle nuts with cotter pins........... ....................... .................. ...... 13.4: Nyloc lock nuts ........... ....................... ........................ ........................ ............ 13.5: All-metal lock nuts ........... ....................... ........................ .................. ...... 13.6: Tab washers / Tab plates ........... ....................... ...................... .......... 13.7: Palnut ............ ........................ ........................ ........................ ........................ ............ 13.8: Lock-wiring ............ ........................ ........................ ........................ ................ .... 13.9: Special bolts............ ........................ ........................ ........................ ................ ....
CHAPTER 14: SECURING DEVICES ........... ....................... ....................... .................... ......... 14.1: Correct use of cotter pins............ ........................ .................... ........ 14.2: Securing pins / safety pins ............ ........................ .................. ...... 14.3: Wire, chains and couplings ........... ....................... .................. ...... 14.4: Correct installation of wire clamps........... ................. ......
CHAPTER 15: STRUCTURE ............ ........................ ........................ ........................ ...................... .......... 15.1: Grating ............ ........................ ........................ ........................ ........................ ............ 15.2: Piping and equipment feedthroughs ........... ............... .... 15.3: Railings ........... ....................... ........................ ........................ ........................ ............ 15.4: Toe boards........... ....................... ........................ ........................ .................... ........ Master your semester with Scribd 15.5: Swing gates........... ....................... ........................ .................. ...... Read Free Foron 30this Days Sign up to........................ vote title & The New York Times Useful Not useful Cancel anytime. 15.6: Ladders ....................... ........... ........................ ........................ ........................ ............ Special offer for students: Only $4.99/month. 15.7: Wind walls
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16.4: CCTV cameras ........... ....................... ........................ ........................ ............ 16.5: Crane boom camera and floodlights ........... ............... .... 16.6: Loudspeakers Loudspeakers ............ ........................ ........................ ........................ ............ 16.7: Junction boxes and cabinets ........... ....................... ................ .... 16.8: Cable trays and cable ladders ........... ....................... ............ 16.9: Antennas, windsocks and sensors ........... ................... ........
CHAPTER 17: OTHER EQUIPMENT ............ ........................ ........................ .................... ........ 17.1: Valve handles and valve wheels ........... ..................... .......... 17.2: Chain-operated valves ............ ........................ ........................ ............ 17.3: Locks on insulation cladding ............ ........................ ............ 17.4: Storage and placement of gas cylinders ......... 17.5: Snatch blocks ............ ........................ ........................ ........................ ............ 17.6: Umbilical roller sheaves (Banana sheaves) .... 17.7: Loop hoses ............ ........................ ........................ ........................ .................. ...... 17.8: Signs ........... ....................... ........................ ........................ ........................ ................ .... 17.9: Racks and storage ........... ....................... ........................ .................... ........ 17.10: Derrick evacuation equipment ............ ...................... .......... RELEVANT REFERENCES ............ ........................ ........................ ........................ ...................... ..........
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The purpose of this handboo handboo
This handbook is intended to help eliminate the risk of drop objects. It applies to equipment that shall be procured, as well a equipment that is already in use. Best practices have been prepa for the equipment covered in this document, which in many ca set a new standard for our activities. An important goal has bee define barriers that shall prevent dropped objects, and which s be used in the procurement, procurement, use and maintenance maintenance of equipmen equipmen
When procuring new equipment, we must endeavour to use tegrated solutions/barriers, since this is the basis for elimina dropped objects. This means that both suppliers and buyers m be aware of this challenge. challenge.
When installing new equipment, an evaluation of the risks re ing to chosen location must be carried out in order to reduce danger of collisions/DO. In addition, equipment must be desig to withstand the environment for which it is intended, and insta to withstand the safest possible access for maintenance (ref. NO SOK, PSA, The Norwegian Oil and Gas Association Association and the Norwegian Labour Inspection Inspection Authority).
The best practices described in this handbook must be comp with throughout the entire value chain, from design to remo By following best practices, we will move towards achieving overall goal of 0 dropped objects. Master your semester with Scribd Read Free Foron 30this Days Sign up to vote title & The New York Times Useful Not For lifting operations, the packing andsecuring ofuseful loads, and Special offer for students: Only $4.99/month. use and inspection of load containers, please refer to The Norweg Cancel anytime.
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Abbreviations / terms ABS: American Bureau of Shipping
AD: Arbeidsdepartementet (The Norwegian Ministry of Lab AISI: American Iron and Steel Institute
API: American Petroleum Institute, issues production stand for equipment used in the oil industry.
Atil: Arbeidstilsynet (The Norwegian Labour Inspection Auth ity)
Barrier, primary: A barrier that is established through instal equipment in accordance with a standard procedure or thro bolts being installed with sufficient torque/pretension.
Barrier, secondary (secondary retention): A barrier that is e lished in order to achieve an extra level of safety (e.g. safety the locking of bolt connections in order to avoid loss of torque You're Reading a Preview pretension), and to protect and secure equipment and personne Unlock full access with a free trial.
CCTV: (Closed-circuit television) surveillance camera Download With Free Trial Competent person: A person that can document practical theoretical knowledge within a particular area or discipline. DIBt: Deutsches Institut für Bautechnik DnV: Det Norske Veritas
Documentable: Equipment must be labelled in a way that ensu to thewith producer or importer, and with information Mastertraceability your semester Scribd Read Free Foron 30this Days Sign up to vote title cluding theTimes load, area of application and product standard. & The New York Useful Not useful Special offer for students: Only $4.99/month.
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Documented training: Training through which it can be do
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DO: Dropped object, i.e. the uncontrolled movement of an ob from one level to another. It is emphasised that dropped objects not only occur during work at heights.
DROPS: Dropped Object Prevention Scheme, a global indu initiative that focuses on the prevention of dropped objects (w dropsonline.org).
EN: European Standards, issued by CEN (The European Comm tee for Standardisation) and adopted by one of the three recogn European standardisation bodies – CEN, CENELEC or ETSI. F.E.M: European Federation of Material Handling HSE: Health, safety and the environment ISO: International Organisation for Standardisation
Lifting equipment: Common term for lifting gear, lifting ap You're Reading a Preview ances and lifting components, used in combination or individu Unlock full access with a free trial.
NHD: Nærings- og Handelsdepartementet (The Norwegian Mi Download With Free Trial try of Trade and Industry)
PSA: The Petroleum Safety Authority
Risk: An expression of the danger that an undesirable incid represents to people, the environment or material assets. The Masterexpresses your semester with Scribd the probability of an accident occurring, as well as Read Free Foron 30this Days Sign up to vote title consequences. & The New York Times Useful Not useful Special offer for students: Only $4.99/month.
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Risk evaluation: A systematic method of describing and/or
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SfS: Samarbeid for Sikkerhet (“Working Together for Safe is among the most extensive collaborative projects within the f of health, safety and the environment (HSE) within the oil and industry. SWL: Safe working load TÜV: Technischer Überwachungsverein
Weak Link: A Weak Link is intended to be the weakest connec point between a tool and its user. The user is able to discon from the tool with a strong tug should an emergency situation cur. Weak Link 1 kg is designed to withstand a tug of 10 Jou without deformation, Weak Link 2 kg is designed to withstan tug of 20 Joules without deformation, etc.
Work at height: All work carried out at a height of 2 m or m above a fixed deck. Remember that on an offshore installat You're Reading a Preview work at height can be carried Be aware of ves Unlock fullout accesson with all a free decks. trial. and subsea equipment. Download With Free Trial WLL: Working load limit
Shall/must and should: In this handbook, the word “must” or “shall” is used where believe that authority requirements apply.
The word “should” refers to a best practice. If another solutio Masterselected, your semester Scribd an equalwith or better level of safety must be documented Read Free Foron 30this Days Sign up to vote title & The New York Times Useful Not useful Special offer for students: Only $4.99/month.
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Part 1: General information Chapter 1: The most important areas – where do dropped objects occur?
The PSA’s project ‘Trends in risk levels in the Norwegian pe leum industry’ (RNNP), publishes an annual report which look the level of risk within the petroleum industry. One of the surve indicators is dropped objects, DFU 21.
During the period 2002-2010, an average of 235 incidents rela to dropped objects were reported to RNNP each year. The num of incidents reported each year has remained relatively stable, w a slight decrease during the last three years, to 146 incident Reading a Preview 2010. On the NorwegianYou're continental shelf, two deaths and 85 Unlock full access with a free trial. sonal injuries related to dropped objects have occurred since 20 Download With Free Trial
According to RNNP, approximately half of all dropped objects cidents that occurred in recent years were related either to ‘dril and wells’ or ‘cranes and lifting’ related work. Of the 873 analy DO incidents that occurred between 2006-2010, 27% were rel to design/technical solutions, 44% to human factors, and the maining 29% were due to external conditions such as the weat wind, waves, etc. For more detailed information, please see Masterannual your semester with Scribd RNNP report. Read Free Foron 30this Days Sign up to vote title & The New York Times Useful Not useful Special offer for students: Only $4.99/month. These facts clearly show that DO is an area upon which Cancel anytime.
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Chapter 2: Kap.2: Barrierer Barriers
Barriers andogmeasures thatskal shallhindre preventeller or reduce Barriererare erfunctions funksjoner tiltak som redus consequences incidents. konsekvenseneofavundesirable uønskede hendelser. We have main types of barriers: Vi har trethree hovedtyper barrierer: Human, Technical and Organisational. Menneskelige, Tekniske og Organisatoriske.
Examples areFelles given for below. Common Eksemplerof påthese slike types finnerofdubarriers nedenfor. alle er at de i all is that they not jobbing, obstruct men effective work proces skalbarriers være hindringer forshall effektiv ekstra sikkerhetsn but provide an extra safety net.
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HTO -
Human (knowledge, experience, qualities and operational methods
-
Technical solutions (safety wires, Nord-Lock, cotter pins, tool bags, etc.) alone serve as barrier functions, but they often need to be combi with organisational and/or human solutions
-
Organisational (procedures, specifications, checklists, etc.)
H and O solutions cannot fulfil barrier functions alone; they m always be combined with at least one of the other solutions. This handbook mainly describes technical barriers. You're Reading a Preview Unlock full access with a free trial.
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Chapter 3: Fall energy and fall factors
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Fall energy All equipment at height has a potential fall energy, whic dependent upon the equipment’s weight and the height from w it may fall.
Fall energy (Ef) is measured in Joules, and calculated using formula Ef=mgh, where m = the weight of the object in kg, h = height from which the object is dropped, and g = the gravitati acceleration (9.81m/s2).
The figure to the left is based on this formula, and can be use calculate fall energy to estimate the severity of possible injurie
The potential for injury depends upon a number of factors, inc ing the equipment’s fall energy, hardness and shape, where it the body, etc.
A fall energy over 40 Joules (red area) may result in serious in or death.
A fall energy between 20 and 40 Joules (yellow area) may resu the need for medical treatment.
a Preview A fall energy between 0You're and Reading 20 Joules (green area) may resu full access with a free trial. the need for first aid, or Unlock no injury.
Download With Free Trial The injury potential must be classified in accordance with th values, and if necessary adjusted with regard to the type of drop object. Sharp objects with low kinetic energy can have a highe jury potential than a blunt/soft object with a higher kinetic ene
The limits described above are the norms used in the Nor gian petroleum industry. SfS is aware that other forums, suc DROPS, operate with other limit values.
MasterFall yourfactor semester with Scribd Read Free Foron 30this Days Sign up to vote title of The fall factor is the length of the fall divided by the length & The New York Times Useful Not useful Cancel anytime.
securing device that absorbs the fall energy. The force to whi object is exposed depends on the energy-absorbing p
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Chapter 4: Routines for work at height
Work operations within the oil industry often involve work height. Many operations therefore contain an element of risk to height: • • •
You are exposed to equipment or work operations above Personnel below you are exposed to your work You work at height above a deck
We distinguish between the securing of personnel working height, the securing of permanent equipment, and the securing tools and parts that are used at height during a work operation.
Ideally, all work should be carried out on a deck with its ends openings secured against falls to a lower level. In this situation, You're Reading a Preview executing worker is secured against falls, and other personnel Unlock full access with a free trial. protected from dropped objects. Download With Free Trial
However, many operations must be executed at height. For s operations, approved scaffolding together with secured to equipment and access control will provide the desired level of fety. If it is most appropriate to work from ladders, riding belt climbing equipment, the executing worker must also be activ secured, and a rescue plan must be in place.
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Only use approved materials (approved scaffolding)
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Chapter 5: Securing tools and equipmen during work at height
When using tools at height, the potential for dropped object great, and represents a significant risk.
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Chapter 5.1: Securing tools <5 kg
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Best practice •
All use of tools at height must be risk assessed
•
All tools shall be secured against being dropped, both du
transport/moving and during work •
Attachment points/devices on tools and bags must be
mentable •
Fastenings on tools shall be energy-absorbing (fall damper
•
A weak link shall be installed between the body and safety
when fall arrest devices are used. Weak links for tools we ing over 2 kg should not be used •
Tools heavier than 2 kg should not be secured to the body
•
You're Reading A tool bag with internal loopsa Preview should be used when sev Unlock full access with a free trial. and/or heavy tools are used at height
Download With Free Trial
•
Wrist straps can be used for one tool weighing less than
with a weak link •
If an attachment point other than the belt or bag is requi
use an appropriate part of the surrounding structure, prefera above the work level
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Chapter 5.2: Securing tools >5 kg
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Best practice •
All use of heavy tools and hand-held machinery where eq
ment may fall to an underlying level must be risk assessed •
All heavy tools and hand-held machinery used at height
be secured against being dropped, both when in use and w being transported •
Only certified lifting equipment shall be used as securing
vices •
The attachment points/devices on tools shall be documente
•
Fastenings on tools shall be energy-absorbing (fall damper
•
Securing points for tools and machinery must be in place
the work site, attached to the surrounding structure, not to s Reading a Preview folding. The securingYou're device must be as tight as possible Unlock full access with a free trial.
•
Tools used at height Download should With be Free checked out/in (ref. Tool Trial
nets for work at height) to ensure that nothing is left behin
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Chapter 5.3: Securing other portable equipment
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Best practice •
All portable equipment used where there is a risk of the eq
ment falling to an underlying level must be secured aga being dropped •
Carrying pouches must always be used for radios and any
portable equipment without certified securing points •
Locks on pouches must have a double securing mechanism
prevent unintentional opening •
Belt clips that allow equipment to become detached
turned 180º should not be used •
Belts with snap fasteners are not suitable for securing eq
ment at height You're Reading a Preview Unlock full access with a free trial.
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Chapter 5.4: Securing equipment and parts
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Best practice •
All repairs and maintenance work carried out at height mus
risk assessed •
All parts, equipment and materials that are worked wit
height must be secured against being dropped •
Smaller parts must be stored in suitable storage boxes,
etc. •
In restricted areas, such as the derrick, flare boom and cra
tools used at height must be logged out and in to ensure nothing is left behind •
When the work is finished, a final check and inventory
must be carried out to ensure that no tools, equipment or m rials are left behind at height You're Reading a Preview Unlock full access with a free trial.
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Chapter 5.5: Tool cabinets for work at height
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Best practice •
Each cabinet/locker shall be equipped with a list of cont
and be kept locked •
A designated person must be responsible for the cabinet
sure that all tools taken from and returned to the cabinet logged out/in •
The contents of the tool cabinet for work at height and its
companying log book must be checked at the end of every s in which the tools have been used •
All tools must be adequately equipped for securing at he
and must have documented attachment points in accorda with Chapter 14: Securing devices •
In addition to the necessary tools, cabinets should be equip
You'reof: Reading a Preview with a sufficient number Unlock full access with a free trial. o Correctly dimensioned safety wires with approved swage locksDownload With Free Trial o Locking connectors/snap hooks o Tool bags with internal fastening devices o Special belts for fastening of tools and bags o Weak links for fastening between the body and safety wire
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Chapter 6: Securing personne
Documented training is a mandatory requirement for all perso using fall arrests.
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Best practice •
The established control procedures, both before and after
must be followed •
Nobody shall work alone or unattended when using fall pro
tion equipment •
Personnel who use fall protection equipment must have
mented training that includes rescue methods •
Necessary rescue equipment and personnel must always
available at the work site •
A buddy check of the rigging and equipment must be car
out •
Fall protection equipment must be CE marked You're Reading a Preview
•
access with a free trial. The equipment mustUnlock be fullchecked at least every 12 month
a competent person and shallWithbeFree labelled with the date for Download Trial next inspection •
The type of securing equipment shall be selected followin
evaluation of the work site •
The anchor point for suspension shall be able to support at
10kN (see requirement in NS-EN795) Master your semester with Scribd Read Free Foron 30this Days Sign up to vote title & The New York Times Useful Not useful • The harness should be equipped with a safety strap (e.g. Special offer for students: Only $4.99/month.
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SALA trauma strap, which allows which allows the wor
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Chapter 7: Securing tools and equipment against wind and weather conditions
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Best practice •
Structures and equipment should be designed so that
cannot collect and form ice •
Establish routines for inspection before, during and after
verse weather conditions, such as strong winds, high wa and the risk of ice/falling ice •
Use available time during shift changes to carry out an
check of equipment that may loosen •
Check whether the workplace is clean and tidy. Equipm
stored on deck and in other areas may be blown over by wind, so check the securing devices •
Check windsocks, wind sensors, floodlights, antennas, ante
masts and scaffolding You're Reading a Preview
•
full access with a free trial. Carefully check thatUnlock equipment in the vicinity of the helid
is sufficiently securedDownload With Free Trial •
Check for any loose objects on roofs, load carriers and
storage areas •
Check that the lids of storage boxes are secured
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Chapter 8: Unnecessary equipment at height
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Best practice •
Regularly carry out a risk assessment and review of
equipment is required at height, and what should be remov •
The review should establish whether equipment should
located to reduce the risk of collision with mobile equipme •
Inspection and maintenance procedures should be revised
ularly, to ensure inspection and maintenance of all equipm installed at height •
Always carry out a final check to ensure that no equipmen
materials are left behind at height
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Chapter 9: Post inspection / final check of the work site
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Experience shows that a clean and tidy workplace is less expo to risk than the opposite.
On facilities and installations with rotations and shift work, effect is intensified by the fact that we are also exposed to o people’s “clutter”.
It is therefore extremely important that we have good routines final checks of the work site.
Best practice •
Always keep your work site tidy
•
Tools, equipment and materials must be secured in a safe
tion at the end of each shift •
You're Reading a Preview When the work is finished, a final check and inventory
full access with a free trial. must be carried out toUnlock ensure that no tools, equipment or m rials are left behind atDownload heightWith Free Trial
•
Check that all equipment is installed, secured and returne
normal operation •
The work site must be left in a clean and tidy state, and
tools, equipment and materials must be returned to their de nated storage places Master your semester with Scribd Read Free Foron 30this Days Sign up to vote title & The New York Times Useful Not useful • Loose objects at height must be removed, attached or secu Special offer for students: Only $4.99/month.
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Chapter 10: Observation technique
Inspection, identification and the categorisation of findings the first steps in minimising the potential for dropped obje
Best practice (inspections) •
Set aside ample time
•
Limit the size of the area
•
Concentrate on a small number of categories and inspect
area in a structured way in order to maintain an overview •
Limit the number of You're personnel each area, in order to Reading ain Preview
tain an overview •
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Findings that do not conform to the established standar
checklist should be photographed and given an accurate scription and site reference •
Follow-up and the correction of findings are decisive facto
preventing dropped objects
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Chapter 11: Responsibility and follow-up Best practice The management’s responsibility •
Ensure a high standard of orderliness and cleanliness, un
take random checks – involve the Area Responsible •
Ensure that routines/systems to prevent dropped objects
established: o Active use of image-based inspection programme o Training in DO observation technique (on the job train o Strengthen daily risk management, identify and manag DO risk o Learning and transfer of experience You're Reading a Preview •
Ensure that time and Unlock resources are set full access with a free trial.aside for work with
routines/systems •
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Check that the routines/systems are followed/used
Your responsibility •
Follow established routines/systems for the prevention of
– follow-up your own actions
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Eliminate dangers to yourself and others
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Chapter 12: Galvanic corrosio Electrochemical series
Cathode (protected) more noble –––––––––––––––––––––––––––––––––––––––– Graphite –––––––––––––––––––––––––––––––––––––––– Titanium –––––––––––––––––––––––––––––––––––––––– Silver –––––––––––––––––––––––––––––––––––––––– Acid-proof steel A4 – passive –––––––––––––––––––––––––––––––––––––––– Stainless steel A2 – passive –––––––––––––––––––––––––––––––––––––––– Iconel – passive –––––––––––––––––––––––––––––––––––––––– Nickel – passive ) –––––––––––––––––––––––––––––––––––––––– e l Silver solder b o –––––––––––––––––––––––––––––––––––––––– n Monel e r –––––––––––––––––––––––––––––––––––––––– o Copper/nickel alloys m ( –––––––––––––––––––––––––––––––––––––––– e Bronze d o –––––––––––––––––––––––––––––––––––––––– h t You're Reading a Preview Copper a –––––––––––––––––––––––––––––––––––––––– C Unlock full access with a free trial. Brass –––––––––––––––––––––––––––––––––––––––– Download With Free Trial Tin –––––––––––––––––––––––––––––––––––––––– ) e Lead l b –––––––––––––––––––––––––––––––––––––––– o Tin solder n s –––––––––––––––––––––––––––––––––––––––– s e Cast steel l ( –––––––––––––––––––––––––––––––––––––––– e Steel and iron d o –––––––––––––––––––––––––––––––––––––––– n Aluminium 2024 – T4 A –––––––––––––––––––––––––––––––––––––––– Cadmium –––––––––––––––––––––––––––––––––––––––– Master your semester with Scribd Read Free Foron 30this Days Sign up to1100 vote title Aluminium & The New York Times Useful Not useful –––––––––––––––––––––––––––––––––––––––– Cancel anytime. Galvanised steel Special offer for students: Only $4.99/month. ––––––––––––––––––––––––––––––––––––––––
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Galvanic corrosion occurs when two dissimilar metals with ferent voltage potentials come into contact with each other in presence of an electrolyte (damp film or seawater/fresh wa When this happens, the less noble metal becomes the anode the more noble metal becomes the cathode.
If a steel screw is fixed to a copper plate, the screw will be the ode since copper is the more noble metal. The screw will corr rapidly as the difference in potential is great.
If the same steel screw is fixed to a less noble plate, e.g. a z
You're Reading a Preview plate, the screw will be the cathode, and will therefore not corr Unlock full access with a free trial. The zinc plate will corrode, as it is less noble than the screw.
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MasterFor your semester Scribd that allRead Free Foron 30 Days these reasons,with it is important securing devices are of Sign up to vote this title & The New Yorksteel Times Useful Not useful pins, stainless type. This applies to cotter safety pins, secu Special offer for students: Only $4.99/month.
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wire, and locking wire for threading through nuts and bolts, etc
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Part 2: Securing fixed equipment
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Chapter 13: Bolted connections
Bolts are currently produced to at least 85 different indust standards, and the requirements for bolted connections vary for different sectors depending on the given design and requireme for operation and maintenance.
Achieving a stable bolted connection therefore requires a quali evaluation of the following factors: • •
Load design. Choice of materials with respect to mechanical properties
corrosion resistance. • • •
The use of lubricant, where appropriate. Pre-tensioning and use of the correct torque equipment. The manufacturers instructions and maintenance procedu You're Reading a–Preview
have to be adhered toUnlock in full each where locking - / securi access case with a free trial. methods are used. •
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The material on bolt and locking nut / - washer must be of
quality.
The locking of bolts in order to secure against loss of torque pre-tension is defined as secondary retention.
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Several independent tests show that double nuts and so-called nuts are not a reliable method for securing screws/bolted conn tions. Below are some recommended methods.
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Chapter 13.1: Nord-Lock bolt securing system
Nord-Lock secures the bolted connection using tension instea friction. The system consists of a pair of washers that fit toget with cams on one side and radial teeth on the other. Since the c angle ‘ ’ is greater than the thread pitch ‘ß’, a wedge effect is ated by the cams, and this prevents the bolt from rotating.
Nord-Lock’s locking washers are certified by several independ institutes, such as ABS, DIBt, DNV and TÜV. Each pair of washers has a unique control number, which ensu full traceability right down to the first installation.
Areas of use: Almost unlimited, but particularly suitable for connections posed to vibrations or other dynamic loads. Nord-Lock’s wash are available in dimensions from 3 mm up to 130 mm in vari You're Reading a Preview materials. Unlock full access with a free trial. Download With Free Trial
Chapter 13.2: Spiralock
Spiralock is an all-metal lock nut/bolt with a specially desig threaded profile that locks when tightened and distributes the sion across the entire length of the thread. This provides better l Master your semester with Scribd Read Free Foron 30this Days distribution, which helps to improve the of the bolt c Sign locking up to vote title & The New York Times Useful Not useful nection. Special offer for students: Only $4.99/month. Cancel anytime.
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TANGENT TO PIN
60d
60d
MAXIMUM COTTER PIN LENGTH
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MINIMUM C PIN LENGT
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A.
CASTELLATED NUT ON BOLT PREFERR ED METHOD.
B.
CASTELLATED NUT ON BOLT ALTERNATE METHOD.
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C.
PIN APPLICATION.
Korrekt Correctmonterin installa splittpinne ibolte Read Free Foron 30this Days Sign up to vote title of cotter
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Chapter 13.3: Castle nuts with cotter pins
Adopted from the aviation industry, castle nuts provide a vis and reliable method of locking bolted connections. The nut radial slots and is locked by non-corrosive cotter pins that are serted through a hole in the bolt.
Areas of use: Unlimited, but often used for critical bolted connections.
Chapter 13.4: Nyloc lock nuts
Nyloc lock nuts are used extensively throughout the industry loc lock nuts should only be used once. Standard Nyloc nuts h Reading a Preview a temperature rating fromYou're ÷70°C to +120°C. Unlock full access with a free trial.
Areas of use: Download With Free Trial This type of nut is often used for locking in connections whe certain degree of lost pre-tension can be accepted.
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Låsemutter med Lock nut splittet topp with split top Låsemutter Lockmed nut withdeformert deformedtopp top
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Låseblikk Tab washer
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Chapter 13.5: All-metal lock nuts
All-metal lock nuts can be used on all bolt dimensions. The locks by the threaded section or top of the nut deforming/splitt or through the nut having a toothed ring under the collar. This p vides greater friction between the bolt/underlay and nut, provid a secure connection. There are many varieties and suppliers on market.
Areas of use: These nuts have an almost unlimited application.
Chapter 13.6: Tab washers / Tab plates You're Reading a Preview
with a free trial. Tab washers can be usedUnlock on fullallaccess dimensions and in any applica where the use of tab washers is appropriate. Download With Free Trial There are several ty with different areas of application for locking either nuts or bo It is important to use the correct type for each purpose.
Areas of use: Typically used on machinery where it is important to prevent bolt from rotating.
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PALNUT PALNUTDIN Lock7967 nut Låsemutter
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Lock-wiring bolts
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Chapter 13.7: Palnut
Palnut locking nut has been on the marked for several decade an alternative for locking bolted connections. The self locking contra nut locks by “cutting” itself into the thre (above standard nut) when it is tightened and will keep the stand nut in place. To be mounted with the plain surface facing downwa against the standard nut. First tightened by hand and thereafter turn with a wrench. PS! Palnuts must not be re-used.
Area of use: This method is widely used as one of several alternatives as extra barrier for locking of through bolts. Industri experience shows that self-locking contra nuts is a relia method to use on bolted connections witch are not exposed heavy and continuos vibrations. You're Reading a Preview All use of this method shall take into account best practice Unlock full access with a free trial. industi experience. Download With Free Trial
Chapter 13.8: Lock-wiring
The lock-wiring of bolts is a locking method adopted from aviation industry. In brief, the method involves threading a spe stainless wire through a hole in the bolt head, which is twisted Masterlocked your semester Scribd to the nextwith bolt or structure, thus preventing the bolt fr Read Free Foron 30this Days Sign up to vote title & The New York Times Useful Not useful rotating and loosening. The wire can be used to lock a maxim Special offer for students: Only $4.99/month. of three bolts in a row, as shown in the illustration (for infor Cancel anytime.
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Chapter 13.9: Special bolts BONDURA BOLT
Bondura bolts have a construction that can take up movem and ovality through the use of expanding tapered sleeves at b ends of the bolt. There are several variants of the bolt, includ straight-through versions and others that are fitted from one s Standard screws are tightened to press in the cones. The bol fixed directly to the machine or equipment with locking scre This prevents the bolt from loosening, falling out or rotating the bolt hole.
Bondura bolts must be fitted and maintained in accordance w the manufacturer’s specifications. Bondura bolts are certified in cordance with API 8C and F.E.M. regulations. You're Reading a Preview
Areas of use: Unlock full access with a free trial. For example, as a replacement for clevis bolts in top drives, Download With Free Trial hinge bolts on dollies, pipe handling equipment and cranes.
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SUPERBOLT® Multi-Jackbolt Tensioners MJT www.superbolt.com
SUPERBOLT® MJT’s are available as nuts or bolts as repl ments for conventional bolting elements. They are safe to because only hand tools are needed for installation and remo Rigging of heavy tightening equipment or the use of sledgeh mers is eliminated.
SUPERBOLT® MJT’s are available in a corrosion resis offshore version or can be specially designed for a specific ap cation. Any inch or metric thread type and size is possible.
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Chapter 14: Securing devices
Wherever possible, equipment installed at height shall feature tegrated secondary retention. If this is not possible, or where risk of DO has been identified, the equipment must be equip with secondary retention, like wire, chain and couplings secu attached to the structure.
Splittpinne montert i sjakkelbolt Cotter pin in a shacklebolt TANGENT TO PIN
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Chapter 14.1: Correct use of cotter pins Best practice •
Cotter pins must be bent sufficiently to prevent them
being knocked out •
Where there is a danger that personnel will be exposed
sharp pin-ends, the cotter pin must be bent as shown in illustration •
When hoisting persons and loads, always use shackles
two barriers – a nut and cotter pin •
Linchpins, spring type split pins or any other type of
pins that can be knocked out must not be used for lifting op tions •
Cotter pins should be made of stainless steel
•
It is a requirement that cotter pins are inspected regularly
replaced when not serving the necessary function
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Chapter 14.2: Securing pins / safety pins
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Best practice •
NB! Securing pins of the type shown in the images should
be used in lifting equipment •
Securing pins shall provide secondary retention
•
Securing pins shall be of the proper size and quality
•
Securing pins shall be secured by wire (where this is appro
ate) to prevent dropping during removal •
It is a requirement that securing pins are inspected regul
and replaced when necessary
Areas of use: Scaffolding bolts, security bolts on removable railings, claw c plings and securing brackets on gas cylinder racks, etc. You're Reading a Preview
full access with a free trial. The pin in the top imageUnlock is usually used in the diving and sub industry Download With Free Trial
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Chapter 14.3: Wire, chains and couplings
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Best practice •
Securing devices must be dimensioned in accordance with
equipment supplier’s calculations. The quality of mater used must be consistent throughout the entire assembly •
Only acid-proof securing wire (AISI 316, type 7x19 IW
shall be used •
All connectors/snap hooks must be made of acid proof
(AISI 316) and be equipped with locks •
Snap hooks / carabiners used should have eyelets
•
Chain must be made of acid-proof (AISI 316) or galvan
steel •
Shackles for use with securing devices should have nuts
cotter pins
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•
The length of the chain or securing Download With Free Trialwire must be as shor
possible to minimise the potential fall energy •
Securing devices must be installed, maintained and inspe
in accordance with the instructions provided in the suppli user manual or maintenance instructions
All securing devices and all attachments to tools and equipm Mastershall yourbesemester with documented andScribd have traceability information. Read Free Foron 30this Days Sign up to vote title As a & The New York Times Useful Not useful name of the manufac mum this shall include batch marking, the Special offer for students: Only $4.99/month. er/importer, production year, and information about the maxim Cancel anytime.
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Chapter 14.4: Correct installation of wire clamps
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Best practice •
Wire clamps must be of the correct number and sized
dimension of the wire •
It is a requirement that wire clamps are assembled, inspe
and maintained in accordance with the manufacturer’s u manual or maintenance instructions
Note: Wire clamps of the U-bolt type must not be used in connec with lifting operations
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Chapter 15: Structure
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Chapter 15.1: Grating Best practice •
Grating must be adequately fixed to underlying structure
prevent loosening due to vibrations or loads •
Grating should be secured against sideways movement
directions, by stopping against structure like nabouring g ing, toe board, railing etc •
Through-bolts or threaded connections with lock nuts
recommended for securing •
Openings in the grating must not exceed 20 mm where per
nel may traffic the area below, and should otherwise not exc 35 mm You're Reading a Preview Unlock full access with a free trial.
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Chapter 15.2: Piping and equipment feedthroughs
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Best practice •
All piping and equipment feedthroughs in decks and gra
must have a toe board and must be covered to the greatest tent possible • •
Canvas or a cladding material can be used Covering is especially important in areas where there is eq
ment requiring periodic maintenance. If done properly, preferably permanently, this is an effective measure aga dropped objects
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Chapter 15.3: Railings
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Best practice •
Railings must be a minimum of 1100 mm high and have
grated toe boards that are at least 100 mm high •
Railings must be functionally designed for the area they
intended to secure, e.g. wire mesh must be installed as requ (loading areas) •
Railings shall not have deformations or cracks that affect
functionality or strength •
It must always be possible to insert movable railings into
fastenings and insert a securing through-bolt •
The safety bolt must be adequately locked using a securing
snap hook (with eyelet) or a cotter pin (see also the section securing pins) You're Reading a Preview
•
Unlock full access with a free trial. Both the safety bolt and locking mechanism must be secure
the immediate vicinity of theWith fastening Download Free Trial •
All connections between elements in the railing must be
cured with a through-bolt and lock nut •
The use of setscrews is not recommended in permanent
ings
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Chapter 15.4: Toe boards
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Best practice •
Decks, gangways and platforms must have toe boards wi
minimum height of 100 mm •
On stairways, every step must have a toe board with a
mum height of 50 mm •
All landings in stairways must have toe boards with a
mum height of 100 mm •
The gap between the deck or grating and toe board must
exceed 10 mm
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Chapter 15.5: Swing gates
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Best practice •
Gates must be of the same strength as the surrounding rail
•
Gates must be secured in order to prevent disengaging
•
Gates must open/swing towards the platform or deck
•
Gates must be designed to automatically return to and rem
in a closed position (self-closing gates) •
On floating rigs/installations it is recommended that a latc
fitted to secure the gate in the closed position •
Toe boards must be integrated with gates in accordance
requirements •
Wherever possible, the hinges should be an integral part
gate
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•
Swing gates must beDownload inspected and With Free Trialmaintained on a reg
basis to ensure adequate functionality
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Chapter 15.6: Ladders
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Best practice •
Ladders higher than 9 m must feature an incorporated rest
form every sixth metre, or be equipped with a permanen arrest device •
Ladders higher than 6 m should have a rest platform
cordance with recommendations from the Norwegian La Inspection Authority •
Safety cages must be installed on ladders higher than 3
on shorter ladders where there is a risk of falling to a lower •
The safety cage must start at a maximum of 2200 – 2300
above the deck/floor. The distance between the upper part railing and the lower part of the cage should be minimise using extra protection as appropriate wherever there is a ri falling to a lower level You're Reading a Preview
•
Unlock full access with a free trial. The safety cage must extend to at least 110 cm above th
level
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•
The diameter of the safety cage must be at least 70-80 cm
•
Any damage or deformation must be reported and correct
soon as possible •
Ladders and safety cages must be inspected on a regular ba
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Chapter 15.7: Wind walls
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Best practice •
Wind wall panels must be fastened to a dedicated sup
structure and never to the main structure •
Wind wall panels must always be reinforced using horizo
steel beams in accordance with the design loads •
Areas that are exposed to collision risk must have stronger
ner mountings secured by through-bolts and lock nuts •
The preferred attachment solution is through-bolts with
washers and lock nuts •
The user manual/instructions must also provide guidelines
the correct installation of joints and attachment points •
Routines for necessary maintenance and the inspection of Reading a Preview wall panels and theirYou're attachment points must be prepared Unlock full access with a free trial.
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Chapter 16: Electrical equipment and instruments
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Chapter 16.1: Floodlights Best practice •
Floodlights must be positioned to prevent being hit by eq
ment/loads •
If there is a risk that the floodlights may be hit by mo
equipment/loads, they must either be protected with reinfor cages / rejector •
Floodlights must be equipped with secondary retention.
attachment points for wire or chains should be integrated, example with eye bolts threaded into the floodlight housin •
Calculations relating to the relevant fall energies must be
able for attachment points and securing devices You're Reading a Preview Unlock full access with a free trial.
•
Fastening devices for securing equipment to brackets or Download With Free Trial
tures should be fitted with secondary retention •
Hatches/screens for the replacement of light bulbs mus
hinged or secured with wire to the floodlight housing/fram •
For new installations, or when installing securing devices
existing equipment, an up-to-date user manual/maintena instructions provided Master your semestershould with be Scribd Read Free Foron 30this Days Sign up to vote title & The New York Times Useful Not useful Special offer for students: Only $4.99/month.
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Chapter 16.2: Lighting fixtures
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Best practice •
Lighting fixtures must be positioned to prevent them being
by mobile equipment/loads •
Lighting fixtures and brackets should be fitted with second
retention •
Attachment points for safety wires should be integrated at
ends of the fixture •
Battery packs must be fitted with secondary retention
•
Above walkways and other trafficked areas, fixtures to w
power is supplied from one side only should be secured at opposite end with a safety wire •
The cover should have steel hinges that can be attached
ther side
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•
Plastic components should avoided, Downloadbe With Free Trial since over time they
weakened by UV radiation •
On existing, older types of fixtures, covers should be secu
using stainless tie wraps or galvanised perforated steel ban •
The component rail should be hinged and must be able
properly secured in the closed position Master your semester with Scribd Read Free Foron 30this Days Sign up to vote title & The New York Times Useful Not useful securing • The strength of attachment points and devices sho Special offer for students: Only $4.99/month.
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be evaluated in relation to the relevant fall energies
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DROPS Reliable Securing
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Automatic Dropped Object
Dropped Object
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Chapter 16.3: Navigation lights / lanterns
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Best Practise - Dropped Object Prevention
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DROPS Reliable Securing
1
Download
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Automatic Dropped Object
Dropped Object
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Best practice •
Navigation lights and lanterns should be placed outside
with normal activity •
The bolts used to attach navigation lights to brackets and
tures should be equipped with secondary retention •
Covers for electrical connections must be hinged or secure
wire •
The strength of attachment points and securing devices
be evaluated in relation to the relevant fall energies •
Navigation lights with sliding grooves for bolt attachmen
the structure are not recommended •
For new installations, or when installing securing device
Reading a Preview existing equipment, You're an up-to-date user manual/maintena Unlock full access with a free trial. instructions should be provided Download With Free Trial
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