“ATTACHM ENT – A” TECHNI TE CHNICA CAL L SPECI FI CAT I ONS FOR PERI ODI ODI C INSPECT INSPECT I ON AND TES TE STI NG OF LPG L PG CY L I NDERS NDERS I N USE USE 1. SCOPE SCOPE 1.1
This This code specifies th the require irements fo for pe perio riodic ins inspection ion, testing ing, ma maint intenance and pai painting nting of L PG Cyli ylinders having ving wa water ter capa capacity city above 5 litre upto upto and and including ncluding 250 250 litre. 2. TERM I NOL NOL OGY 2.1
For the purpose purpose of thi this s code code, the def definiti nitions gi given in IS: IS:72 7241-1981 41-1981 and Gas Cyli Cyl inde nder Rules 2004 shall apply. 3. GENERAL GENER AL 3.1
All L PG cyli cyl inde nders shall shall be subj subjected to periodi riodic c ins inspe pecti ction on and test as per IS: I S:886 8868-1988 8-1988 (Pe (Periodical riodical In I nspec specti tion on I nterval for gas gas cyli cylinde nders in use use.). .). As As per CCOE CCOE letter R.4/(2)85/I R.4/(2)85/III dtd. 19.06.1991, the periodici odicity ty and testing testing of new cyli cyl inders is is seven years from from the date of manufacture ufacture provide provided that: that: (i) (i)
I f any any surfa surface defects are found on visua visual examination tion as per I S:13 S:13258 258,, the cyli cylinder shall be subjected to compl complete ete examination tion and and testing testing irres rrespe pective cti ve of period
(ii)
Subsequent examination tion and and testi testing ng shall all be done withi within n a period of every 05 years
3.2
The The hydrostatic test pressure to be applied shall be 2.45 Mpa Mpa (25.00kgf /cm /cm2). 3.3
Cylinders due for periodic inspection and test shall be identified primarily from the date of manufacture ufacture stamped on the cyli cyl inder nder or the las last periodi periodic c test date stam stamped ped on the cylinder. 3.4
Any testi testing ng station station desiri siring to obtain obtain recognit recognitiion for periodi riodic c testi testing ng and exam examination tion of cyli cylinde nders sha shall provide provide the facil faciliti ities set set forth forth in in sch schedul dule IV IV and sha shall subm submit to CC CCOE the particulars rticulars of the facil ciliti ities provided provided & scruti scrutiny ny fee spe specif cified in sche schedul duled V of Gas cylinder rules 2004. 3.5
The The vario rious references which ich are necessary adjun juncts to this code are give iven in App Appendix-1 ix-1
3.6
The The vario rious operation ions and their sequences are give iven in App Appendix-2 ix-2 4. SEGRE SEGREGAT GATII ON 4.1
All the the marki rkings ngs of each cyli cylinde nder shall be scrutiniz scrutinize ed to establ stabliish that it it compli plies with with the requirem requirements of I S:319 S:31966-L L atest and and with with any any other other statutory requirem requirement appl applying ying to its use. The cylinder having lost its identity with respect to its original manufacturer, serial number, date of manufactur anufacture e and the relevant relevant code of manufacture anufacture shal shalll be branded and declared unserviceable. 4.2
The The cylin cylind der fou found acceptable as as per Clause 6.2 of of this code sh shall be se segregated separately rately for for hot rep repairs. airs. 5. PREPARATION 5.1 Removal of Valve 5.1.1
All the cyli cyl inde nders shal shall be depre depress ssuri urized zed to atm atmospheric ri c pressure. pressure. The T he contents sha shalll be release eleased in in asafe safe manner. 5.1.2
The The gas shall be cold flared by using ing a suita itable adopter connected to a header. The The gas so coll collected in in the headers shall shall be finall nally vented vented through a pipi piping ng above the the roof roof level. 5.1.3
The The adopter used for for the purpose should not press the valve lve spind indle beyond 2.5mm. 5.1.4
The The va valve lve sh shall be removed ca carefully fully aft afte er en ensurin ring co complete depressuriza ization ion. While removing oving the valve valve a sui suitabl table e adopter and proper fi fixture shal shall be use used to ensure ensure that that valve valve or cyli cyl inde nder is not not dam damaged. Preferab Preferablly the Cyli ylinder should be verti vertical cal at the tim time of valve removal. 5.2Degassing .2 Degassing of Cylinders 5.2.1
Work Wor k on LPG L PG cyli cylinde nders shall not be carr carriied out in in enclose nclosed spa space prior prior to degassing. 5.2.2
Degassing to be carri rried out in in CCOE CCOE approved pproved site. site. Cyl Cyliinde nders shal shall be degass gasse ed by purgi purging ng the sam same by by ine inert gas, steam or by fi filling wa water ter til till it overf overfllows. In I n cas case e of purging purging by water, the water shal shall be retaine retained for for not les less s than one one hour hour to ensure ensure that that entire tire vapour vapour or gas remaini aining ng in in the cyli cyl inder com comes out. A fter emptying ptying out the water, water, cyli cylinders shal shall be kept in in inve invert rted ed positi position and and be tapped gently ntly by non-m non-metal etallic hammer to rem remove dust, dust, rust or any loose loose remnants in in the cyli cyl inder.
5.2.3
After degassing the inside of LPG Cylinder shall be checked by explosive meter to ensure that the Cylinder is gas freed and shall again be taken up for degassing till it is completely gas freed. 5.3 External C leaning 5.3.1
Each cylinder shall have the external surface thoroughly cleaned by caustic soda solution, non ferrous wire brushing and water jet. Care shall be taken to ensure that the body of cylinder is not damaged. 5.3.2
While cleaning the surface of cylinder by caustic soda solution or water jet, the bung of cylinder should be closed by suitable plastic/rubber cap to prevent entry of solution in to the cylinder. 5.3.3
Any suitable method of surface cleaning other than the methods as mentioned in clause No.5.3.1 and 5.3.2 may be used as agreed upon between the owner of cylinder and testing station. 6. EXTERNAL AND INTERNAL INSPECTION 6.1
All the cylinders shall be visually examined for dents, cuts, gouges, bulges, cracks, laminations, corrosion at external and internal surfaces of cylinder as per IS:13258-1991. Cylinders beyond the acceptable limits as specified in IS:13258-1991 shall be branded and declared unserviceable. Cylinders having wall thickness less than 90 percent of the designed wall thickness shall also be rejected. The rejection criteria for cylinders will be recorded as per Appendix-5 (Attachment-I) 6.1.1
For checking the internal surface of cylinders, a low voltage lamp of suitable intensity shall be used. 6.1.2
Before carrying out the internal inspection of cylinders the inside portion of cylinders shall be properly cleaned by using vacuum pump, compressed/hot air and magnetic bar to remove any foreign particle and traces of water inside the cylinder. 6.2
Cylinders having damaged non pressure parts such as valve protection (VP) ring, foot ring etc. however acceptable as per 6.1 of this code, may be segregated for hot repair.
6.3 Valve Pad (Bung) Thread Inspection 6.3.1
The thread of valve pad (bung) of each cylinder shall be checked by L-1&L-9 plug gauge. The valve pad thread shall be properly cleaned by soft wire brush and 3/4”.14 NGT thread cleaning tab before checking. 6.3.2
The cylinder of which the valve pad thread is worn out ,not meeting their respective thread gauge ,broken at any point, rough surface on threads shall be branded and declared unserviceable. 6.4 Tare Weight Checking 6.4.1
After degassing and through external and internal cleaning, the cylinders shall be checked for tare weight. 6.4.2
Any cylinder having lost its weight by more than 5%of original tare weight shall be branded and declared as unserviceable. 6.4.3
While checking the tare weight, if disparity is observed as per Clause 6.4.2 a due consideration shall be given if the disparity has occurred due to change in type of valve, VP ring foot ring or other fitments. Where it can be clearly established that the disparity between the actual and stamped tare weight is not due to excessive corrosion the cylinder shall be taken for further operation. 7 HY DROSTAT IC T EST 7.1
More than one cylinder may be tested at a time provided that they all have the same test pressure & that each individual test point is capable of being isolated. 7.2
The test pressure shall not be less than 2.45 Mpa (25.00kgf /cm2) as marked on the cylinder. A suitable device shall be employed to ensure that no cylinder is subjected to a pressure in excess by 1kgf /cm2 to its specified test pressure. 7.3
The hydrostatic test pressure once attained shall be held for not less than 30 seconds and during the test period the pressure gauge used for registering the pressure shall not indicate any drop in pressure. While carrying out the inspection of cylinder(s) the external surface shall be totally dried by using compressed air for visual examination of leakage.
7.4
During the test period the cylinder(s) shall not show any sign of leakage, visible deformation or defect. 7.5
Any cylinder that fails to comply with 7.3 &7.4 of this code shall be declared and branded as unserviceable, provided that the drop in pressure as mentioned in 7.3 has not taken placedue to leakage in the fixture or the joints. 7.6
Calibration of equipments shall be carried out at periods not exceeding following: (i) Working Pressure Gauge - 01 month (ii) Master Pressure Gauge (iii) Weighing Equipment (iv) Test Weight
- 06 month - Check by test weight daily when in service
- As per Weights & Measures or 02 years whichever is earlier
7.7
The fixture installed for hydrostatic test shall have covered shed with adequate illumination. 8.0 INTERNAL CL EANI NG AND DRYING 8.1
Subsequent to hydro-static test the remaining water inside the cylinder shall be completely removed. The internal surface shall be dried by compressed air/hot air and pump, the same shall be checked by low voltage lamp. If required the process as per clause6.1.2 be repeated. 9.0 PAINTING 9.1.1
Cylinder(s) found acceptable in all the tests described above shall be taken for primer coating. Before applying the primer coat, it should be ensured that the external surface of cylinder is properly cleaned of dirt, dust and loose remnants of previous paints so that a uniformcoating is obtained. The bung threads should be closed by a plastic /rubber cap to prevent the entry of primer and paint in to the cylinder.
The following technical specification covers the painting of LPG Cylinders 1. Surface Preparation : The existing painting to be removed by means of Mechanical cleaning. This may be done by scraping, chipping, wire-brushing, rubbing with abrasive paper or steel wool. However the following sequence of operations to be carried out under mechanical cleaning: (a) Scraping of existing paint with hand scraper (b) Wire brushing (first with coarse and then with fine wire-brushes) (c) Sand papering with coarse sand paper (No.3) or steel wood (No. 2) or emery paper (No. 3) or emery cloth.
The above procedure gives a reasonable assurance that no loose mill scale or heavy rust is left on the surface. 2. Application of paints: After the surface is thoroughly cleaned, the painting is to be carried out as per the specifications given below:
(a) Primer & Signal Red painting: Zinc chromate Primer conforming to IS-2074 (latest) (specs. attached) and Good lass Nerolac ISC 537 Signal Red shade super synthetic enamel paint conforming to IS: 2932 (latest). Good lass Nerolac product bearing ref. No.2570/02501. After the cylinder(s) have been coated with primer, the cylinder(s) shall be left in air for drying. The drying time shall be as per paint manufacturer's/supplier's recommendations. Paint thickness: The Min. Coat thickness for both layers of primer and enamel shall not be less than 15 microns for each coat. After Painting, the party shall have to ensure the total Paint thickness should be not less than 35 microns. The primer coat shall be applied soon after completion of pre cleaning or pretreatment in order to prevent contamination of the surfaces in any way. The practice of leaving primer exposed for a long time prior to applying the finishing coats shall be discouraged as the usual primer application is too thin to give adequate protection for long periods 9.1.2
The Zinc chromate primer used shall conform to IS : 2074 – 1992 and shall be of brushing consistency and suitable for spraying . It is desirable that the primer used is certified by BIS for its conformity to IS:2074 - 1992. The colour of primer should be of red oxide. 9.2 Signal Red Painting 9.2.1
After the cylinder(s) have been coated with primer, the cylinder(s) shall be left in air for drying. The drying time shall be as per paint manufacturer’s/supplier’s recommendations.
9.2.2
The signal red paints shall be based on the super synthetic enamel conforming to IS:2932- 2003 having the colour category No:23 (2)Signal red as per IS:2932-2003,which is also shade no 537 of IS:5-1994. 9.2.3
The paint shall be of brushing consistency and suitable for application by spraying. It is desirable that thepaint used is certified by BIS for its conformity to IS:2932-2003. 9.3 General Requirements for Painting. 9.3.1
Both the primer coating and signal red finish paint shall be applied on the external surface of cylinder by using a suitable pneumatic spraying gun in a fabricated painting booth having provision for water curtain draft and rotating arrangement for cylinder(s). 9.3.2
While applying the primer coating and final painting, care should be taken to ensure that the shadow zones such as surfaces under foot ring, VP ring etc. are properly coated. 9.3.3
A uniform coating of primer and finish paint shall be applied, the minimum coat thickness for both layers of primer and paint shall be as per the specification of concerned purchase order issued by respective Oil company. 9.3.4
Sufficient drying time should be provided after finish painting. The area around the bung within the VP ring shall be painted as per the requirements of owner of cylinders (oil companies) 9.3.5
The coat thickness for primer & paint surface has to be done in line with IS 3196 (Part I) as per the following procedure: a) Five gauge readings for each spot shall be taken moving the probe a short distance for each new gauge reading within an approximate area of 2 cm x 2 cm. Any usually high or low gauge readings that cannot be repeated consistently, needs to be discarded. b) Make five such spot measurements approximately evenly spaced over the surface of the cylinder. c) Each spot shall not be below 8 percent of the specified minimum thickness and average of the five spot measurements shall not be below the specified thickness.
9.3.6
For better results it is desirable that the primer and paint both are obtained from the same source. 10. TARE WEIGHI NG 10.1
The tare weighing shall be carried out including the weight of valve and safety cap. 10.2
The weighing scale used shall have a least count of not more than 20 gms. and the value of tare weight may be rounded to the nearest 100gms. as per IS:2-1960 11. MARK ING / PUNCHI NG 11.1
After satisfactory completion of periodic inspection and testing, each cylinder found acceptable shall be marked with following on the vertical stays of cylinder. a) The Identification mark of the testing unit as registered with Chief Controller of Explosives, Nagpur, b) The new test date retaining the previous test dates. Above is to be punched on the stay plate as per Appendix 3. c) Loss in tare weight, if observed under 6.4.2 (within 5 percent of original T are weight) is to be punched at the footring as per Appendix 3 12. STENCIL ING 12.1
The cylinders so marked shall be taken for stenciling of tare weight, net weight and next due date for testing. The colour coding for stenciling of next due test date shall be as per Appendix-4. 12.2
The stenciling, its size, colour and locations shall be as per requirement of owner of cylinder. 12.3
The stenciling of Safety messages & other information on the cylinders is to be done as per the requirement of the respective Oil company. However the necessary drawings shall be referred to maintain Font type, size & colour for putting the messages. 13. VAL VE FI XI NG 13.1
Each valve shall be fitted with a suitable torque wrench or pneumatic device at a torque of 145 +15 ft. lb. using Teflon tape or any other jointing compound approved by Oil
Industry to ensure a seal between the valve and the bung joint. A suitable adopter shall be used to prevent any damage to valve fixing operation. 13.2
Before valve fixing operation the valve pad (bung) threads shall be cleaned by using ¾” – 14 NGT cleaning tap and wire brush. Subsequently the same shall be checked as per Clause 6.3 of this code. 13.3
Before valve fixing, the internal of cylinder shall be dried out by compressed air, foreign particles etc. shall be removed by bar magnet and checked by low voltage lamp. 14.0 PNEUM ATIC T EST
Each cylinder after it has been fitted with valve shall be tested for leakage by subjecting to air pressure of not less than 12 kgf /cm2 for a period of one minute while immersed in water and shall show no leakage from the body of the cylinder and the joint between valve and bung. This test shall be carried out after fixing the safety cap on the valve. 15. RECORD K EEPI NG & CERTI FI CAT E 15.1
Record shall be maintained for all tests and inspections at the cylinder testing station and copies shall be made available to statutory authority if required. A certificate with respect to fitness of cylinders shall be issued and records be kept safely. 15.2
The recording procedure to be followed is explained in Appendix-5. 16.0 HANDL ING OF REJ ECTED CYL INDERS 16.1
All rejected cylinder shall be marked prominently with paint showing the reason of rejection. Following code shall be used. HST-R PT-R TW-R BT-R VI-R MU-R HR
– – – – – – –
HST Testing Pneumatic Testing Tare weight loss Bung thread rej. Visual insp. rej. Marking unidentified Hot Repair
IM PORTANT NOTES
Cylinder Retesting Activity is to be carried out as per thestandard code of practice based on various guidelines as stipulated under Gas Cylinder Rules & applicable BIS standards. The following process is mandatory: 1. Cylinders shall be taken from Filling shed(after segregation of the same from main conveyor line by our employee), and stacked in filling/valve changing shed. Segregation of cylinders, after scrutinizing the identity details with respect to Sr. No., Name of Manufacture, Last Test date etc., shall be done. 2. A batch of reasonable number of cylinders shall be formed & an identity number shall be given to batch for maintaining necessary control. Also a Route card is to be made for stage-wise inspection of thecylinder batch. 3. The cylinders declared as unserviceable shall be segregated and record for the same shall be maintained. Cylinders have to be declared unserviceable in line with the norms given in IS 13258. 4. Degassing of Cylinders shall be done after Cold flaring, Valve Removal & Filling with water. The Degassed cylinders shall be checked using explosive meter which shall be calibrated fromtime to time. 5. Internal & External I nspection of cylinders shall be carried out in line with IS:13258. Rejection criteria as spelt out in IS:13258 to be strictly adhered to. 6. Bung Thread Inspection using L-1 & L-9 plug gauges & cleaning the same with Ύ" 14 NGT thread cleaning tap shall be properly ensured. 7. Cylinders shall be checked for Tare Weight. Loss of Tare weight beyond 5 % of original Tare weight requires rejection of cylinder. Tare weight loss within 5 % to be noted & later on punched as LTW (Loss in Tare Weight in gms.) on cylinder Foot ring. 8. Cylinders to be hydrotested at 2.45 MPa (25.00kg/cm2) using proper Test system which ensures isolation of individual test point. It has to be ensured that no cylinder is subjected to a pressure in excess of 1 kg/cm2 to its specified Test Pressure & accordingly a cut off system should be incorporated. The test pressure once attained shall be held for not less than 30 seconds. 9. After the cylinders pass Hydrostatic Testing, remaining water inside the cylinders shall be completely removed. The internal surface shall be dried by compressed air / hot air and vacuum pump. The same shall be checked by low voltage lamp. The cylinders passing the internal inspection to be taken up for painting & further processing. 10. Pneumatic test at 1180 kpa (12 kg/cm2) shall be performed on cylinders.
APPENDIX 1 L IST OF REFERENCES
1. Gas Cylinder Rules 2004 2. IS:3196-1992 Welded low carbon steel gas cylinder exceeding 5 litres water capacity for low pressure liquefiable gases. 3. IS:4379 – 1981 Identification of contents of industrial gas cylinders. 4. IS:13258 – 1991 Code of practice for visual inspection of LPG cylinders in use. 5. IS:7241 – 1981 Glossary terms used in gas cylinder technology. 6. IS: 8868 – 1988 Periodical inspection interval for gas cylinders in use. 7. IS : 2074 – 1992 Ready mixed paint, air drying, red oxide zinc chrome priming. 8. IS : 2932 – 2003 Enamel, synthetic, exterior (a) Undercoating, (b) Finishing. 9. IS : 5 – 1994 Colours for ready mixed paints and enamels. 10. IS-2-1960 Rules for rounding off numerical values.
APPENDIX 2 SEQUENCE OF OPERAT IONS FOR STAT UTORY PRESSURE TESTING OF LPG CY L INDERS
1. 2. 3. 4. 5. 6. 7. 8.
Receipt of cylinders. De-pressurizing Recording details (like Sr. No., Test Dates, Tare weight, Manufacturer’s name) Valve removal Degassing External surface cleaning Internal cleaning and internal inspections Visual Inspections of external surface and bung threads by L-1 and L-9 plug gauges. 9. Tare weight checking 10. Hydrostatic testing 11. Internal cleaning and checking 12. Primer coating 13. Signal red painting 14. Punching of new test date and repairer’s identification mark. 15. Tare weighing. 16. Colour code painting to indicate ownership of cylinders, stenciling new tare weight, net weight and next test date. 17. Tapping the bung thread, cleaning the same by brass wire brush and checking the bung threads by L-1 & L-9 plug gauges. 18. Valve fixing 19. Pneumatic test 20. Certificate and dispatches.
APPENDIX 3 DETAI L S OF MARK ING ON STAY PLATE
OLD TEST DATE TEST DATES XXX
YYY
XXX : IDENTIFICATION MARK OF TESTING STATION Y Y Y : MONTH AND YEAR OF TEST DATE DETAI LS OF MARK ING ON FOOT RI NG
LTW ZZZ
ZZZ : LOSS IN TARE WEIGHT IN GMS.
APPENDIX – 4 COLOUR CODING OF L PG CYL INDERS 1) In case of these cylinders, immediately after retesting, the month and year shall be punched on the outside of one of the stays. 2) In order to indicate the next quarter of testing , the inside of one of the stays be painted with a suitable colour (details given below) and the next quarter and year of the testing due shall be painted. For distinguishing the quarters , A, B, C & D should be used on calendar year basis. For example if a cylinder has been tested in 7/90, the marking on the inside of the stay will beC95. 3) Every time a cylinder goes for retesting , a separate stay of the cylinder shall be used for indicating the next period of testing retaining the earlier one (without defacing the colour coding of the earlier stay). In other words, when the cylinder completes 3 periods of testing it would indicate 3 test dates on 3 stays meaning that the cylinder has completed 15 years of use. 4) The periodicity of inspection & testing of LPG cylinder in use is revised as under: a) First testing at an interval of 10 years from the date of manufacturing b) Subsequent testing at an interval of every 5 years. The permission is applicable for the cylinder manufactured from the second quarter of 2000 onwards. In view of this change of periodicity, the 07 year colour scheme for coding of inside portion of one vertical stay plate for first is revised to 10 years colour scheme , as given under: Background
ISI Specifi cation
L ettering
Black Yellow White Sea Green Dove Grey Air Craft Blue Salmon Pink India Brown Satin Blue Bus Green
Shade No.521 Shade No.355 Shade No.127 Shade No.217 Shade No.694 Shade No.108 Shade No.443 Shade No.415 Shade No.177 Shade No.299
White Black Black Black Black White Black White Black White
Y ear of manufacturing 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009
Y ear of Retesting 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019
Note :The subsequent retesting being after every 5 years, the applicable colour for the year in which the next retest in due will be painted. Basis the HR/Retesting being carried out against current tender, the colour coding for background and lettering will be as applicable for the year in which the next retest is due.
Painting: Zinc chromate primer as per the specifications of IS : 2074 (latest) and super synthetic enamel paint as per the specifications of IS:2932 (latest) procured from LERC (I ndustry LPG Equipment Research Center) recommended Paint manufacturers ie M/s. Asian Paints / Goodlass Nerolac / ICI Limited / Berger Paints / Shalimar Paints / Bombay Paints to be used. Zinc Chromate Primer & Super synthetic enamel paint of any other manufacturer whose product is certified by LERC as conforming to IS: 2074 (latest) & IS:2932 (latest) can also be used. Random samples will be draw from Primer & Paint (Four liters each of the primer & paint samples in one liter packs) either at the paint manufacturer's end or from the retesting station and will be forwarded to LERC Bangalore once in a year for testing purposes. The frequency of testing can be increased as per the requirement. Before commencement of the Job contractor has to produce Test certificate froman independent laboratory certifying that the paint proposed to be utilized for the job is confirming to IS: 2074. Both the primer coating and signal red finish paint shall be applied on the external surface of cylinder by using a suitable pneumatic spraying gun in a fabricated painting booth having provision for water curtain, draft and rotation arrangement for cylinder(s). While applying the primer coating and final painting, care should be taken to ensure that the shadow zones such as surfaces under foot ring. VP ring etc are properly coated. A uniform coating of primer and finish paint shall be applied, the minimum coat thickness for both layers of primer and paint shall not be less than 30 microns. Sufficient drying time should be provided after finish painting. The area around the bung within the VP ring shall be painted requirements of owner of cylinders (Oil Companies) For better results it is desirable that the primer and paint both are obtained from the same source. 1
In case of these cylinders, immediately after retesting / reconditioning, the month and year shall be punched on the outside of one of thestays.
1
In order to indicate that next quarter of testing, the inside of one of the stays be painted with a suitable Colour as advised by HPC MYSORE LPG Plant for distinguishing the quarters A, B, C & D should be used on calendar year basis. For example, if a cylinder has been tested in 7/98, the marking on the inside of the stay will be 'C 03'.
2
All tested and painted cylinders found to be fit for further use should be provided with French blue Colour painting inside the shadow zone of V.P.Ring. The Colour of the paint shall conformto shade no: 166 of IS: 5:1978.
3
4 5 6
New tare weight shall be screen-painted with yellow paint (Shade No 355 of IS 5) on three equally spaced places on French Blue Colour background (in the shadow zone of VP Ring). The size of stenciling shall be25mm long x 3mmwide. Tare weight should be screen painted in Black on Signal Red back ground on the inner side of 2 vertical stay plates. 6Net weight to be screen painted with black paint on signal red paint outside the shadow zone of VP Ring. Thesize of lettering shall be 20mm long x 2mmwide. The following Messages shall be screen painted in English and Hindi as per attached drawing along with HPGAS logo on both sides.
"SWITCH OFF REGULATOR WHILE NOT IN USE", DELIVERY".
"CHECK SEAL ON
" FOR DOMESTIC USE ONLY " For exact location / details please refer relevant extracts of detailed drawing of LPG cylinders (copy attached). Further the messages to be screen painted on the Cylinders are likely to be modified / added from time to time, latest drawings of which will be made available by HPC MY SORE L PG Plant. No extra payment will be made for any additions / modifications to be carried out at a later stage as directed by HPCL MYSORE.
APPENDIX-5 PROCEDURE FOR RECORD K EEPING
Since the cylinders received at Retesting Stations will be of different serial numbers of different manufactures, the recording and handling of cylinders should be done with proper care to ensure a systematic and batch- wise movement of cylinders so that there is no mix up resulting into escape of few operations. Following methods are suggested for handling and recording of cylinders. 1. On receipt of cylinders , from a batch of suitable number of cylinders preferably one day’s production. 2. Record the details of cylinders as per the Attachment-1 of this appendix. This is called as ROUTE CARD. The format is to be printed on thicker card as this will move along with the batch and shall be handled at the shop floor to avoid mutilation and tearing off. The important stages where the recordings are to be made are given in the Route Card. On completion of operation/inspection, the concerned inspecting staff shall sign on the card with date and forward the same to the next stage. By following this procedure it may be noted that recording of Sr. No. of cylinders, Test dates, Name of manufacture at all the stages is avoided. 3. IT is advisable that the allotment of batch number is linked with year and month of testing. Eg. 05 A - XX which indicates 05 as the year of resting, A for the month of J anuary, B for the month of February etc. and XX is the control number for the month as1,2,3…This procedure provides necessary assistance in monitoring the control on the production as well as for easy access to a certain cylinder if any information is required in future. 4. The format of certification will be as per Attachment No. 2 and Annexures . The various reasons of rejection shall be coded as given in Rout Card and marked on the back of Annexure ll of Attachment 2.
Name of LPG Cylinder Testing Station : APPENDIX -5 ATTACHMENT-1 ROUTE CARD Owner of LPG Cylinders ... IOC / BPC / HPC Batch number .................... Batch Size .................. Date : ........................ ___________________________________________________ Control No. Sr. No. of LPG Cylinders Name of Manufacturers Date of Manufacture (i.e. first Test Date) Previous Test Dates Internal & External Inspection Internal Inspection OK/Rej. External Inspection RT/HR/Rej* Tare Weight Check Ok/Rej. Hydrostatic test at 2.45 MPa (25.00 Kgf /cm2 OK/Rej.
1
2
……….
TareWeight Old New Bung threads rechecked OK/Rej. Final Inspection for marking, painting, stenciling and any other defects Accepted /Not Accepted Remarks, if Any
Name & Signatureof Inspector : _________ Date of Completion : _________ * RT - Accepted for retesting, HR-Hot Repair, Rej. Rejected. The code used shall be as given below: Bulge – E1 Burn - E2 Dent - E3, Dig-E4, Cut - E5, Pit - E6, Line Corrosion -E7, General Corrosion -E8, Bung thread damaged-E9, Identity lost -E10, Internal defect cannot be assessed –I 1, Wall thickness less than limits-I 2
APPENDIX - 5 ATTACHMENT 2 NAME OF TESTI NG STAT ION: CERTI FICATE ON PERIODIC TESTI NG OF LPG CY L INDERS
Certificate No:
Date :
AAA : This is to certify that LPG cylinders having nominal water capacity of ----liters as per ANNEXURE I belonging to IOC/BPC/ HPC have been found acceptable in visual inspection as per IS:13258-1991 and Hydrostatic Test at 2.45 Mpa (25.35 Kgf /cm2 )pressure as per IS:3196- Latest. These cylinders are fitted with self closing (SC) type LPG valves as per IS:8737 pt. II 1978 of type 1 threads (3/4”-14 NGT OF ANSI -B 57. 1 -1975) BBB : The cylinder rejected/ recommended for hot repair are as per Annexure ll CCC : Batch No.
Batch Size
No .of Cylinders accepted : No : of Cylinder Rejected : Duration of Testing : From
To
Certifying Authority
ANNEXURE - 1 NAME OF TESTI NG STAT ION: L IST OF LPG CYL INDERS ACCEPTED
Owner of cylinders IOC/BPC/HPC Certificate No. Date : SI. NO. Cyl. No.
Name of Manufacturer
Dateof Mfr
Tare weight
Old New 1 2 3 Certifying Authority.
Appendix 6 STATEMENT OF STOCK OF VALVES
NAME OF THE PARTY
:
MONTH
:
DATE
: DEFECTIVE VALVES
GOOD VALVES
OPENING BALANCE RECEIVED FOUND DEFECTIVE AFTER CHECKING OLD VALVES USED ON RETESTED CYLINDERS DEPATCHED/HANDED OVER TO HPCL CLOSING BALANCE CUMULATI VE FIGURES
GOOD VALVES
DEFECTIVE VALVES
RECEIPT FROM HPCL REMOVAL FROM CY LINDERS DESPATCHED/HANDED OVER TO HPCL NEW VALVES FOR THE MONTH CUMULATI VE
RECEIPT FROM HPCL DESPATCHED/HANDED OVER TO HPCL CLOSING BALANCE
