Standard API | ASTM | BS | DIN | DNV | GB | ISO | JIS | KS | LR | NF | Others
NF
Standard Number
A49-400 (Longitudinally Electric Resistance Welded Unalloyed Steel Tubes D 17.2Min 406.4mmMax for the Transport of Pressurized Fluids)
Grade TSE220 TSE250 TSE290 TSE320 TSE360Nb TSE360B TSE415Nb TSE415V [ All grade ]