underground piping works for ows and cbd lines underground piping works for ows and cbd lines in hgu-205 for rlng conversion project at manali refineryof cpcl , carbon steel piping work , the job includes transporation of all free issue materials from owners storage point to work site , handling at site , cutting , bevelling , fabrication , laying , welding & erection of carbon steel piping including sleeve pipes below ground level , trenches at all depths , stand posts , anchoring of all underground pipelines for conection with equipments & nozzles . , the piping job includes all modification and replacement jobs involving pipes & all types of fittings like elbows / tees / reducers / half coupling / full coupling , etc . , all types of flanges like slip on / raised face , etc . , valves , steam traps , orifice assemblies , strainers , vents , drains , funnels , etc . , of different schedules , pressure ratings and for various temperature applications , the piping job includes fabrication & erection of pipe sleeves , providing shoe supports , pads at support locations , reinforcement pads , etc . , wherever required . , the job includes flushing , preparing work area for executing hot work , bending to suit the contours wherever required , socket , fillet , butt welding using e 6010 / e 6013 / e 7018 electrodes as required , dpt wherever required , , hydraulic / pneumatic test twice ( on completion of fabrication & on completion of laying at site ) as per codes , specification , drawings and draining of water & drying with compressor air after hydrotest . , the job also includes supplying of all types of tools & tackles , lifting arrangements like chain pulley blocks , machineries , all consumables and labour to complete the job in all respects , returning back the unused materials to owners storage point and dumping the generated scrap material to designated area as per eic instructions . , exclusions: the rates for the following items shall be exclusive of concrete / pcc breaking , earth work removal , blinding & deblinding , radiography , stress relieving , reinforcement pad welding , earth back filling , removal of old piping for replacement . , inclusions: the rates for the following items shall be inclusive of fabrication , laying , erection , welding , flushing of the piping system , offering stagewise inspection , hydrotesting and draining / drying of the piping system and coating & wrapping/tape coating , guide or slide supports welding between main pipe and sleeve pipe , pads and shoes wherever required . contractor shall carryout tape coating as per specification 6-79-0011 and offer for inspection and testing at every stage . , with cpcl supply of free construction power , water & contractors welding machine , note: if hydrotesting is avoided as per instructions of eic , 90% of unit price only will be paid . , butt welding , notes : , ( 1 ) thickness of piping for measurement shall be based on the relevant ansi or equivalent standards , ( 2 ) the finished weld joint elevation at site shall be taken as reference for measurement , wherever applicable . , ( 3 ) the rates for socket & fillet welding in piping shall remain same for all thickness and elevations as per sor . , ( 4 ) rate for weld joints of vents & drains shall be paid on actual measurement using the applicable sor . , ( 5 ) fabrication & welding of pipe shoe supports & pad at support locations are included in unit price . , ( 6 ) for blinding & deblinding wherever involved , rates shall be paid separately . , ( 7 ) for stress relieving of weld joints , rates shall be paid separately , ( 8 ) in case of replacement of existing piping , rates for removal of old pipelines shall be paid separately , ( 9 ) during hydrotesting of the above piping jobs , some portions of the existing piping in the circuit required to be hydrotested depending on the blinding and the same shall be paid separately . , ( 10 ) for steam tracing piping work , hydraulic testing of piping is required . for bending tracer pipelines , the rates shall be paid separately , ( 11 ) hydraulic testing shall be done only once for testing underground and sleeve pipes before wrapping & coating . . , ( 12 ) radiography of weld joints is not included in sor and same shall be paid separately . , ( 13 ) wrapping & coating /tape coating of pipelines is included in price thru a separate sor item . refer below . , carbon steel - butt welding joint - upto 8 . 8 mm piping thickness - with hydrotest , blinding and de-blinding , the job includes collection & transportation of required quantity of materials like blinds , gaskets , fasteners , etc . , from owners storage point , loosening & tightening of studs ( cold / gas cutting if required ) , wedge opening , cleaning of flanges , insertions and removal of blind & gaskets , providing new gaskets after removal of blinds , overhauling of fasteners using oil , replacing the defective studs / nuts to ensure zero leak of joints including hot bolting . , the job also includes supplying of all types of tools & tackles , lifting arrangements like chain pulley blocks , machineries , all consumables and labour to complete the job in all respects , transportation of unused materials to owners storage point and dumping the generated scrap material to designated area as per eic instructions . , blinding and deblinding for 150# & 300# ratings: , blinding & deblinding - size upto 1 1/2 inch dia , blinding & deblinding - size 2 inch dia . to 5 inch dia . , tape coating: supply and application of corrosion protection tape caoting for underground steel pipelines as per specification , radiography , the job includes performing radiography examination of welds on all piping & all type of equipments as per relevant asme / astm standards & as per cpcl specification cpcl-insp-rad-01 at all grades & elevations with film width not less than 4 inches . , the job also includes supplying of radiation source camera , other machineries required , all consumables required for filming & developing , transportation of camera , etc . , area preparation before starting the job , labour , supervision to complete the job in all respects including preparation of developing chemicals , developing the films & submission of films for inspection review . , note: , ( 1 ) for pipe weld joints , nominal diameter of the pipe shall be taken for measurement . . , pipe weld joints - 2 nominal dia , pipe weld joints - 4 nominal dia , dye penetration test , performance of dye penetrant test including supply of all necessary materials , equipment and labour for carrying out the work as per specification and directions of engineer-in charge . , dye penetration test , concrete breaking/road cutting/earth excavation & back filling for laying or removal of underground piping/dewatering . , earth work excavation & back filling , the job involves earth work excavation below ground level upto 2 metres depth & to a required width for laying underground piping in all types of soils including removal of vegetation , if required , dressing of sides , levelling , grading , ramming of bottom , back filling on completion of laying of pipes with available excavated soil , watering , rolling , ramming of by manual methods / mechanical compactors , dressing , trimming , etc . , the job also includes supplying of all types of tools & tackles , machineries , all consumables and labour to complete the job in all respects as per eic instructions . , earth work excavation & back filling - upto 2 . 0 metres depth , shoring and strutting , the job involves provision and installation of shoring and strutting in excavations upto 2 metres depth , dismantling and removal after completion of work as per instruction of engineer in