Specifications 1) OD:20-219mm 2) WT: 2-75mm 3) Application Structure Pipe 4) Certification API Grade: 12Cr1Mov, 12CrMo,15CrMo, 13CrMo44,Cr5Mo,25CrMo, 30CrMo,40CrMo, P5, T5, P22 (10CrMo910), T91, P91,A335 P9, A213 T9Standard: DIN 17175-79 JIS G3467-88 JIS G3458-88 GB5310-95 GB9948-88ASTM A335/A335M ASTM A213/A213M Specification table: 10-20*2-3194-219*6-8-12-20-25-3825-28*2.5-4-6-7245-273*10-12-14 ...