Seamless Steel Pipe, Carbon Seamless Steel Pipe
Used for oil and gas transportation, the general structure, mechanical structure with seamless steel pipes.

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 
GB/T8162 Seamless Steel Tubes for Structural Purposes 
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 Steel tubes for precision applications. Technical delivery conditions. Seamless cold drawn tubes 
EN 10297 Hot rolled seamless steel tubes with an application in the mechanical and general engineering 
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 
GB/T8162 : 10, 20, 35, 45, 16Mn, 12C rMo, 15CrMo, 12C rl MoV 
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 10297: E355K2, E470, E420J2, E590K2 
EN 10210 : S235JRH; S275J0H, S275J2H; S355J0H, S355J2H; S275NH, S355NH; S275NLH, S355NLH 

Size and Specification of Seamless steel pipe 
Outer Diameter; Hot finish: 2" - 30",Cold drawn: 0.875" - 18" 
Wall Thickness; Hot finish: 0.250" - 4.00",Cold drawn:0.035" - 0.875" 
Length; Random Length, Fixed Length, SRL, DRL 
Heat treatment: 
Annealed: Bright annealed, , Spheroidize annealed 
Normalized, Stress relieved, Cold finished, Quenched and Tempered