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Product Detail :
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Modification of governor oil pressure lines of generating units at gerusoppa power house
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| Tender Detail : |
Modification of governor oil pressure lines of generating units at gerusoppa power house
a. supply of 5 meters of seamless carbon steel pipe, size 150nb, od 168.3mm, wall thickness 10.97mm, confirm to sch 80, astm a 106 gr. b. b. supply of 3 nos. of carbon steel flanges l50nb, 300 class, confirm to sch 80, ansi b16.9 and astm a 234 gr wpb. c. supply of 0l nos. of l50nb carbon steel elbow 90o, bw, sch. 80, seamless, ansi b16.9 and astm a 234 gr-wpb. d. supply of 12.5 meters of 25x25 mm size angles for modification of oil retaining system arrangement. e. dismantling of existing pressure pipelines of governor oil system ie. pipeline from sump tank to receiver tank, receiver tank to msv, msv to servomotors, msv return line and hmc return line. f. fabrication of pipeline no. 1, 2, 4, 27 and 3 with modification as mentioned in the drawing for lifting of pipeline layout from trench ground surface. the fabrication shall be made such that it should avoid addition three flanged connection. the welding during fabrication shall be with suitable argon welding. g. if required, the suitable modification in flanged joints shall be carried out to with stand the surge pressure in the sump tank to receiver tank and msv pressure line by fabrication to male female flange from existing male male joint. h. replacement of flange gasket of all the flanged joints. i. reconnecting of pipelines after flushing with oil to clean the inner surface of pipeline from welding burrs. j. providing suitable anchoring arrangement at equal intervals of pipeline approx. 13 anchoring arrangement. k. pressure testing of pressure pipelines ie. sump tank to receiver tank and msv, msv to servomotors pipelines with test pressure of 60kg. k. modification of hmc oil drain return line to suit the trench accessibility. l. reconnecting of pressure pipeline to sump tank, receiver tank and msv. m. reconnecting of msc return pipeline to sump tank. n. pressurizing of governor oil system and checking for proper operation. o. fabrication of oil retaining scheme at turbine pit by 25mm angle with bending of radius of 3038mm and welding as in the provided drawing. |