Standard API | ASTM | BS | DIN | DNV | GB | ISO | JIS | KS | LR | NF | Others
NF
Standard Number
A49-217 (Steel Tubes Seamless Tubes for Heat Exchangers )
Grade TUZ12C13 TUZ10C17 TUZ2CN1810 TUZ2CN1810AZ TUZ3CN1809 TUZ1CNS1815 TUZ6CNT1810 TUZ2CNNb2520 TUZ2CND1712 TUZ2CND1814 TUZ2CND1712AZ TUZ6CND1711 TUZ1CND2522AZ TUZ2CNDU1716 TUZ1NCDU201806AZ TUZ1NCDU252004 TUZ1NCDU312703 TUZ2CND18503 TUZ2CND220503 TUZ2CND250703 TUZ5CNDU210802 [ All grade ]