Pipe materials for pipe spools shall conform to one of the material specifications described below in accordance with the customer's piping specifications :Mild Steel Pipes as per IS 1239 Medium Heavy duty upto 150 NB & above 150 NB as per IS 3589, 5.00 MM Thick KS D3507 SPP or D3562 SPPS, ERW pipe. Other required pipe materials such as API pipe, stainless steel or alloy steel pipes would be available to meet service conditions and should be referred to us.