Certification of Lancashire Boiler No WBL 8110 including cleaning, dismantling and repairing at Ningah Colliery under Satgram-Sripur Area

Amount

Item description

Cleaning of Lancashire boiler

During NDT of the boiler shell plate, it was noticed that the thickness near steam side surface of LHS 2nd, 3rd and 4th streak between 4 o'clocl to 6 o'clock position.The position where the thickness gauging was carried were built up by electric arc welding with pre-post heat treatment and dressed smooth to original shape and thickness

Supply and fitting of new IBR quality fusible plugs (02 nos) in original manner with IBR test certificates and approval from boiler inspector

Cutting out of old adaptors 2 nos, fabrication of two new adaptors from HT bar and then welding the same in the boiler

Staggered and isolated pitting were observed at 5 to 7 o'clock position of the boiler front end plate near mud hole during inspection. The position where the thickness gauging was carried are to be built up by electric arc welding with pre-post heat treatment and dressed smooth to original shape & thickness

All the adamson ring joints of the boiler are to be caulked

Overhauling of feed check valve including machining of valve seats and refabrication of valve spindle

Overhauling of main steam stop valve including thorough dismantling and refabrication of valve spindle and bush, machning of valve main seat and base seat for making it leakproof

Overhauling of gauge coloumn cocks and replacement of inner spares and refitting to boiler with new gauge glass , rubber cones and rings

Overhauling of blow down valve including high pressure test of the valve to withstand pressure of 2 times of boiler working pressure

The bottom manhole studs to be replaced with new one

Blanking of boiler for hydraulic test

Pressure test of boiler at 1.5 times of the working pressure in presence of Dy Director of Boilers,WB.After successful testing and certificate the boiler is to be commissioned for firing

Overhead profit

Statutory boiler dry and hydraulic inspection fees and arrangement of inspection by Dy. Director of Boilers,WB

Total impact of GST for the purpose of CTC

M/s Prasanta Karmakar (BID ID -1133121)