30 inch seamless steel pipe
Seamless steel pipes are perforated from whole round steel, and steel pipes without welds on the surface are called seamless steel pipes. According to the production method, seamless steel pipes can be divided into hot-rolled seamless steel pipes, cold-rolled seamless steel pipes, cold-drawn seamless steel pipes, extruded seamless steel pipes, and top pipes.
We provide seamless mechanical steel tubing products designed to thrive in demanding, high-stress applications. You find these seamless steel pipes in automotive components where performance depends on reliability and quality. In addition, you find your seamless mechanical steel tubing for industrial applications – ranging from bearings to cylinders and gears – where toughness is essential for functionality. Oil and gas exploration is another common use for our seamless mechanical tubing, where durability and component life below the Earth’s surface is paramount.
We produce seamless mechanical steel tubing, in the hot-rolled condition, close to your finished part size, which makes it very competitive compared to other forging or machining processes. You may also purchase seamless steel pipes in sizes recommended to clean up at finished part dimensions, which allows for optimum material utilization. Our size range ranks among industry leaders, from 3.0″ to 13″ (76 mm – 330 mm) with outer diameter-to-wall ratio from 4:1 to 14:1.
We focus on continually improving the quality of seamless steel pipes. With recent investments in an intermediate finishing line, water-blast descaling process, and continuous induction thermal treat facility, we offer quality, customized solutions. Our approach to manufacturing integrates our melting, rolling, piercing and finishing operations, helping to ensure quality control from start to finish.
Standards of seamless steel pipe
API SPEC 5L | |||
Product Name | Executive Standard | Dimension (mm) | Steel Code / Steel Grade |
Line Pipes | API 5L | Ø10.3~1200 x WT1.0~120 | A, B, X42, X46, X52, X60, X70, X80, PSL1 / PSL2 |
API SPEC 5CT | |||
Product Name | Executive Standard | Dimension (mm) | Steel Code / Steel Grade |
Casing | API 5CT | Ø114~219 x WT5.2~22.2 | J55, K55, N80, L80, P110 |
Tubing | API 5CT | Ø48.3~114.3 x WT3.2~16 | J55, K55, N80, L80, P110 |
ASTM / ASME | |||
Product Name | Executive Standard | Dimension (mm) | Steel Code / Steel Grade |
Black and Hot-Dipped Zinc-Coated Seamless Steel Pipes | ASTM A53 | Ø10.3~1200 x WT1.0~150 | Gr.A, Gr.B, Gr.C |
Seamless Carbon Steel Pipes for High Temperature Service | ASTM A106 | Ø10.3~1200 x WT1.0~150 | Gr.B, Gr.C |
Seamless Cold-Drawn Low-Carbon Steel Heat-Exchanger and Condenser Tubes | ASTM A179 | Ø10.3~426 x WT1.0~36 | Low Carbon Steel |
Seamless Carbon Steel Boiler Tubes for High Pressure | ASTM A192 | Ø10.3~426 x WT1.0~36 | Low Carbon Steel |
Seamless Cold-Drawn Intermediate Alloy Steel Heat-Exchanger and Condenser Tubes | ASTM A199 | Ø10.3~426 x 1.0~36 | T5, T22 |
Seamless Medium-Carbon Steel Boiler and Superheater Tubes | ASTM A210 | Ø10.3~426 x WT1.0~36 | A1, C |
Seamless Ferritic & Austenitic Alloy Steel Boiler, Superheater & Heat-Exchanger Tubes | ASTM A213 | Ø10.3~426 x WT1.0~36 | T5, T9, T11, T12, T22, T91 |
Seamless Carbon and Alloy Steel for Mechanical Tubing | ASTM A333 | Ø1/4″~42″ x WT SCH20~XXS | Gr.1, Gr.3, Gr.6 |
Seamless & Welded Carbon Steel Pipes and Alloy Steel Pipes for Low Temperature Use | ASTM A334 | Ø1/4″~4″ x WT SCH20~SCH80 | Gr.1, Gr.6 |
Seamless Cold-Drawn Carbon Steel Feedwater Heater Tubes | ASTM A556 | Ø10.3~426 x WT1.0~36 | A2, B2 |
DIN | |||
Product Name | Executive Standard | Dimension (mm) | Steel Code / Steel Grade |
Seamless Steel Tubes for Elevated Temperature | DIN 17175 | Ø10~762 x WT1.0~120 | St35.8, St45.8, 10CrMo910, 15Mo3, 13CrMo44, STPL340, STB410, STB510, WB36 |
Seamless Steel Tubes | DIN 1629 / DIN 2391 | Ø13.5~762 x WT1.8~120 | St37.0, St44.0, St52.0, St52.3 |
Seamless Steel Tubes | DIN 2440 | Ø13.5~165.1 x WT1.8~4.85 | St33.2 |
Seamless Steel Pipes for Structural Purpose | DIN 2393 | Ø16~426 x WT1.0~36 | RSt34-2, RSt37-2, RSt44-2, St52 |
BS | |||
Product Name | Executive Standard | Dimension (mm) | Steel Code / Steel Grade |
Seamless Steel Tubes for Machine Structure | BS 970 | Ø10~762 x WT1.0~120 | Carbon Steel |
Seamless Steel Tubes for Boiler and Heat Exchangers | BS 3059 | Ø10~762 x WT1.0~120 | 360, 410, 440, 460, 490 |