Standard API | ASTM | BS | DIN | DNV | GB | ISO | JIS | KS | LR | NF | Others
NF
Standard Number
A49-401 (Steel Tubes Longitudinally Fusion Welded Non Alloy and Micro Alloy Sttel Tubes for Fluid Transporting Pipes and Pressure Vessels)
Grade TSE220 TSE250 TSE290 TSE320 TSE360 TSE415 TSE450 TSE480 [ All grade ]