annual maintenance contract of 2 x 500 mw turbine and auxiliary equipments under the scope of t and a iph department sgtpp , amc for emoph department sgtpp , mandatory job : mechanical maintenance contract for t&a iph area of u#3&4 ( 2x500mw ) , sgtpp , wbpdcl , identification & rectification of condenser tube leakage . , lph-renewal of gasket of manhole plug repairing / replacement of separator door plates , air leak test for all tubes and plugging of damaged tubes , hph-renewal of gasket of manhole plug , repairing / replacement of separator door plates , air leak test for all tubes and plugging of damaged tubes , deaerator mechanical cleaning , checking & repairing of nozzle along with storage tank cleaning . , turbine oil cooler mechanical cleaning , painting job- one coat epilux-610 primer & 2 coat epilux 5 coal tar ( berger paints make ) , painting job- one coat red oxide primer & 2 coat synthetic enamel ( berger paints make ) , insulation & de-insulation dia upto 200 mm dia pipe ( 3 layer ) with cladding . , insulation & de-insulation dia 201 mm to up to max dia . ( 3 layer ) with cladding . , insulation & de-insulation valve up to 200 mm dia ( 3 layer ) with cladding . , insulation & de-insulation valve dia . above 201mm up to maximum dia . ( 3 layer ) with cladding . , hp welding job for pipe per joint for pipe up to od 100mm . , dmcw ( sg / tg ) phe acid cleaning , supply of skilled worker during oh