Tender For bid to ras supply of pipe s. s. aisi-316 l, size 20 mm schedule 40 seamless for nc plant, material test certificate requir,pipe s. s. aisi-316 l, size 25 mm schedule 40 seamless for nc plant, material test certificate requir,pipe s. s. aisi-316 l, size 50 mm schedule 40 seamless for nc plant, material test certificate requir