High Quality API 5L ASTM A53/A525 Sch40 Gr B Schedule 80 Black Carbon Steel Square Tube ERW Welded Black Round Steel Pipe

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Product Description

Basic Information
Type
Welded
Technique
ERW
Material
Carbon Steel
Surface Treatment
Black
Section Shape
Round
Origin
China
ERW Welded Black Round Steel Pipe

We are a premium supplier and processor of specialty carbon steel, high/low temperature steel grades, corrosion resistant stainless grades, and duplex materials. Product forms include steel plate, bar, tubular, and structural forms. With state-of-the-art manufacturing processes and contemporary technologies, we offer the finest quality products at advantageous rates.

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Technical Specifications
Dimensions Outer Diameter: 1/2"-24"
Wall Thickness: 1.65-20mm
Length: 3-12m, or Customized
Standards API 5L, ASTM A53, ASTM A178, ASTM A500/501, ASTM A691, ASTM A252, ASTM A672, EN 10217
Steel Grades API 5L: Gr.A, Gr.B, X42-X70
ASTM A53: GR.A, GR.B
EN: S275, S355J2H
GB: Q235, Q345, L245-L555
Surface Finishing Hot dip galvanized, Electro galvanized, Black, Bare, Varnish coating, Anti-rust oil, Coal Tar Epoxy, 3PE

Primary Applications

Our ERW pipes are used for Pipeline Transport, Boiler Pipes, Hydraulic/Automobile applications, Oil/Gas Drilling, Machinery Industry, Chemical Industry, Mining, and Construction & Decoration.

Chemical & Mechanical Properties
Standard Grade Chemical Composition (max)% Mechanical Properties (min)
C Mn Si S P Yield (Mpa) Tensile (Mpa)
GB/T700-2006 A0.221.40.350.0500.045235370
B0.21.40.350.0450.045235370
BS En10025 S235JR0.171.4-0.0350.035235360
S355JR0.241.6-0.0350.035355470
API 5L PSL1 A0.220.9-0.030.03210335
B0.261.2-0.030.03245415
Quality Control & Inspection

We follow strict quality standards for all manufacturing processes. A dedicated quality control team supervises assurance aspects throughout the production system. Regular tests include Chemical Component Analysis, Mechanical Property Testing (Tensile, Yield, Elongation), Flattening Test, Bending Test, Hardness Test, Impact Test, Hydrostatic Test, and NDT (ET, RT, UT).

Quality Certificate Pipes in Stock

Frequently Asked Questions

What are the main steel products available?
Main products include carbon steel welded pipes (LSAW, ERW, SSAW), seamless pipes, pipe fittings (flanges, elbows, tees, reducers, nipples), and various sheets, coils, strips, and bars.
How is product quality controlled?
A specialized quality control team monitors the entire production process. We conduct regular chemical, mechanical, and technical tests to ensure consistent and uniform product quality.
Which regions do you export to?
We have exported to more than 50 countries, primarily in the Middle East, Russia, United States, Canada, Australia, Japan, and Southeast Asia.
Do you provide samples or support OEM?
Yes, small stock samples are provided for free. Customized samples typically take 2-3 days to prepare.
What are the standard payment terms?
Terms include T/T (30% deposit, 70% balance before shipment), L/C at sight (30-120 days), Western Union, or Paypal.
What surface treatments are available for pipes?
We offer lightly oiled, hot-dip galvanized, electro-galvanized, black, bare, varnish coatings, and protective coatings like 3-layer PE or Coal Tar Epoxy.

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