supply of drum to drum boiler tubes supply of drum to drum boiler tubes , supply of drum to drum boiler tubes , top header to bottom header side wall tubes size :- 76.2 od x 3.66 mm thick x 6.4 mtr. long. material specification ibr / bs-3059 1990 part-2 erw-360 make tata , top header to bottom header side wall tubes size :- 63.5 od x 3.66 mm thick x 7 mtr. long. material specification ibr / bs-3059 1990 part-2 erw-360 make tata , drum to drum tubes material specification ibr / bs-3059-1990 part-2 erw-360 make tata , 1 ) size 50.8 od x 4.06 mm thick x 6811 mm , 2 ) size 50.8 od x 4.06 mm thick x 6605 mm , 3 ) size 50.8 od x 4.06 mm thick x 6412 mm , 4 ) size 50.8 od x 4.06 mm thick x 6224 mm , 5 ) size 50.8 od x 4.06 mm thick x 6037 mm , 6 ) size 50.8 od x 4.06 mm thick x 5837 mm , 7 ) size 50.8 od x 4.06 mm thick x 5690 mm , tube for super heater coil. material sa-2 gr. t-22 make ismt size:- 50.80 mm od x 4.06 thickness x 6mtr. length hydraulic test pressure at 48 kg / cm and temp. 380°c + 10° c , super heater coil as per drawing no. sm 285 / 2009 , note :- material test certificate to be attached with supply of tubes