Pipelaying Tender-VOL I - WorleyParsons.com

3NCR/GAS-O&M/DM(O&M)-152/2012/216 - 30/08/20121) One full-length pre tested pipe (approx. 12m) shall be insertedunder the existing GAIL pipeline so that no joint comes withinthe pipeline crossing. Any tie-in joints of the crossing shall be atmin 5 m distance on either ends from the center of the GAILpipeline.2) The clearance between M/s. HPCL's pipeline top surfaces toGAIL pipeline bottom surface shall not be less than 500 mm.3) A Concrete slab (PCC) M15 of 80 mm thickness as per 15456 /Plastic grating of 8 mm thickness shall be installed between thepipelines at a distance of 200 mm from the top of gas pipeline.4) Maximum over hang length of GAIL pipeline shall not exceed8.0 meters during construction of crossing.5) Since impressed cunent cathodic protection (CP) system cancause stray current interference on adjacent pipeline dependingupon the location of the ground bed, the exact location ofpipeline and operating characteristics of CP system, a commontest lead point with the facility of PSP monitoring of GAIL andother pipeline shall be provided by lWs Hindustan PetroleumCorporation Limited and study should be conducted for theeffect of the stray potential of otler pipeline with or without theCP system.6) Any CP system introduced by IWs Hindustan PetroleumCorporation Limited for protection of their pipeline under GAILROU shall be approved by GAIL and such that it shall not causeany interference to existing CP system of GAIL and shall notdrain the current from GAIL CP system. A joint survey forinterference shall be conducted after installation of CP system asper standard practices and in case of any interference M/sHindustan Petroleum Corporation Limited shall take measure tomitigate the same on their own cost up to the satisfaction ofGAIL. Method of mitigation e.g. bonding, electrical shield,galvanic anode etc. shall be examined and approved by GAIL. Alltesting and study cost shall be borne by M/s HindustanPetroleum Corporation Limited.MH2145-C000-PS-RFQ-0020Page 268 of 334