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Square Pipes from China | Durable Longitudinal Welded Pipes
Durable & Strong: Manufactured from high-grade carbon, alloy, or stainless steel, ensuring long-lasting performance.
Precision & Reliability: Strict adherence to international standards (API, ASTM, EN, GB) guarantees uniform dimensions and superior quality.
Versatile Coating Options: Fusion bond epoxy, coal tar, 3PE, bitumen, and other coatings enhance corrosion resistance.
Wide Range of Sizes: Outer diameter from 355.6mm to 1626mm, wall thickness 8–50mm, and lengths up to 12m.
Comprehensive Testing: Chemical, mechanical, and technical tests ensure maximum safety and performance.
Oil & Gas Pipelines: Ideal for transporting fluids under high pressure.
Structural Applications: Suitable for building frameworks, bridges, and industrial structures.
General Industrial Use: Perfect for manufacturing, machinery, and construction projects.
| LONGITUDINAL WELED | ||||
| Type | Outer Diameter(mm) | Wall Thickness (mm) | Length (m) | Standards |
| ERW Steel Pipe | 21.3 ~ 660.4 （1/2‘’--26‘’） | 1.5~22.2 | 0.3~18 | ASTM 53, EN10217, DIN 2458. IS 3589, JIS G3452, BS1387 |
| SSAW Steel Pipe | 219.1 ~ 3048 (8″--120″) | 4~30 | 3～70 | ASTM A252, EN10217-1,2,5, EN10219-1, BS, JIS, IS |
| LASW Steel Pipe | 355.6 ~ 1820 | 5.0~50 | 3~12.5 | ASTM 53, EN10217, DIN 2458. IS 3589, GB/T3091, GB/T9711 |
API 5L Line Pipe: API 5L PSL1/PSL2 GR B , X42, X46, X52, X60, X65, X70
MECHANICAL PROPERTIES AND STEEL CHEMICAL COMPOSITION
STEEL GRADE | Yield strength, min. psi (MPa) | Tensil strength, min. psi (MPa) | Elongation in 2 in., min. % |
GR B | 245 | 415 |
|
X42 | 290 | 415 | |
X46 | 320 | 435 | |
X52 | 360 | 460 | |
X56 | 390 | 490 | |
X60 | 415 | 520 | |
X65 | 450 | 535 | |
X70 | 485 | 570 |
STEEL GRADE | % by mass, Maximum | ||||
C | Si | Mn | P | S | |
GR B | 0.26 | 0.40 | 1.20 | 0.030 | 0.030 |
X42 | 0.26 | 0.40 | 1.30 | 0.030 | 0.030 |
X46 | 0.26 | 0.40 | 1.40 | 0.030 | 0.030 |
X52 | 0.26 | 0.40 | 1.40 | 0.030 | 0.030 |
X56 | 0.26 | 0.40 | 1.40 | 0.030 | 0.030 |
X60 | 0.26 | 0.40 | 1.40 | 0.030 | 0.030 |
X65 | 0.26 | 0.40 | 1.45 | 0.030 | 0.030 |
X70 | 0.26 | 0.40 | 1.65 | 0.030 | 0.030 |
STEEL PIPES AS PER ASTM A53 GR. B:
MECHANICAL PROPERTIES AND STEEL CHEMICAL COMPOSITION
STEEL GRADE | Composition Max, % | ||||||||
C | Mn | P | S | Cu | Ni | Cr | Mo | V | |
GR B | 0.30 | 1.20 | 0.05 | 0.05 | 0.40 | 0.40 | 0.40 | 0.15 | 0.08 |
Q: What materials are used to manufacture square pipes?
A: Square pipes are made from high-quality carbon steel, stainless steel, and alloy steel, depending on the required strength, durability, and application.
Q: What sizes and thicknesses are available?
A: Our square pipes range in outer diameter from 355.6mm to 1626mm, wall thickness from 8mm to 50mm, and lengths up to 12 meters.
Q: What standards do your square pipes meet?
A: We manufacture pipes according to international standards, including API 5L, ASTM A53, EN10217/10219, DIN 2458, IS 3589, and GB/T3091/9711, ensuring high quality and reliability.
Q: What surface coatings are available?
A: Square pipes can be supplied with various coatings like Fusion Bond Epoxy, Coal Tar Epoxy, 3PE, Vanish Coating, Bitumen, or Black Oil, based on customer requirements for corrosion resistance.
Q: What are the main applications of square pipes?
A: They are widely used in oil and gas pipelines, structural applications such as buildings and bridges, and general industrial use,s including machinery and fabrication projects.
