Range:  15 NB UP TO 1200 NB IN SCH 5S , 10S ,10, 20 , 40S , 40 , STD , 60 , 80S , 80 , XS , 100 , 120 , 140 , 160 & XXS
Form:  Seamless / Erw / Welded in Round & Square .
Carbon Steel:  ASTM / ASME A 53 GR. A , B ASTM / ASME 106 GR. A , B ,C . API 5L GR. B , API 5L X 42 , X 46 , X 52 , X 60 , X 70. ASTM / ASME A 691 GRA , B ,C
Alloy Steel:  ASTM / ASME A 335 GRP 1 , P 5 , P 9 , P 11 , P 12 , P 22 , P 23 , P 91 ASTM / ASME A 691 GRP1 CR , 1 1/4 CR , 2 1/4 CR , 5 CR , 9CR , 91.