... ~25mm Standard:ASTM A312, D3/T3 GUOBANG STEEL have Pipe and Pipe Fittings process workshop,ISO9001:2008,PED97/23/EC,and AD2000 ... ,GOST and RTN certfied, month output:550metric ton for pipe, 300metric ton for pipe fittings.316L mod is the modified 316L, standard ... 2000-Merkblatt W0 Classification Society Accreditation:BV, DNV, LR, GL, ABS, NK, KR, CCS Main Material:300 series.: 304/L, 304H ...