Quality Standard: 

API 5L Standard Specification for Seamless Line Pipe or Seamless Pipe Line

ASTM A 53 Standard Specification for Pipe, Steel, Black and Hot-Dipped, Zinc-Coated, Welded and Seamless

ASTM A519 Seamless Carbon and Alloy Steel Mechanical Tubing 

ASTM A106 Seamless Carbon Steel Pipes for oil pipeline and gas pipeline transportation 

JIS G3441 Alloy steel tubes for machine purposes 

JIS G3444 Carbon steel pipes for general structural purposes 

JIS G3445 Carbon steel tubes for machine structural purposes 

DIN 2391 Seamless Precision Steel Tubes 

EN10305 Stainless steel pipe for precision applications. Technical delivery conditions. Seamless cold drawn tubes

EN 10210: Seamless structural steel pipes

Steel Grade: 

API 5L: Grade A, Grade B, X42, X46, X52, X56, X60, X65, X70, X80

ASTM A 53: Grade A, Grade B, Grade C, Type F, Type E

ASTM A519: 1010-1045, 4130-4142, 5135

JIS G3441: SCM 415 TK, SCM 418 TK, SCM 420 TK, SCM 430 TK, SCM 435 TK, SCM 440 TK 

JIS G3444: STKM 11A, STKM 12, STKM 13, STKM 14, STKM 15, STKM 16, STKM 17, STKM 18

STKM 19, STKM 20

DIN 2391: St30Si, St30A1, St35, St45, St52

EN10305: E235, E355 

EN 10210: S235JRH; S275J0H, S275J2H; S355J0H, S355J2H; S275NH, S355NH; S275NLH, S355NLH