Carbon Steel Round Welded Pipe
Products Description
Product Name: Carbon Steel RMaterial: Carbon Steel
Type: ERW Welded Pipe
Surface: Black / Black oxide finish
Application: Construction, structure, fluid pipeline
Feature: Stable weld seam, reliable quality
Service: Custom cut-to-length, Mill Test ound Welded PipeCertificate available
Dimensions of Carbon Steel Round Welded Pipe
★Outer Diameter (OD): Ranges from 10mm to 2000mm (approximately 1/2 inch to 72 inches).
Common sizes: 21.3mm (1/2"), 48.3mm (2"), 60.3mm (2.5"), 114.3mm (4").
★Wall Thickness: Typically 0.8mm to 20mm, depending on schedule and application.
Standard schedules: SCH 10, SCH 20, SCH 40 (STD), SCH 80 (XS).
★Length: Usually supplied in 6 m or 12 m random lengths; custom lengths up to 18 m are available.
Standards & Grades of Carbon Steel Round Welded Pipe
Common international standards and corresponding material grades include:
★ASTM A53: Covers both welded and seamless pipes for mechanical and pressure applications.
Grade A: Lower strength, suitable for general use.
Grade B: Higher yield strength (~35,000 psi), widely used in industrial and pipeline systems.
★API 5L: Standard for line pipe in oil and gas transmission.
Grades: B, X42, X46, X52, X60, X65, up to X80 - with increasing yield strength for high-pressure service.
★GB/T 3091: Chinese standard for low-pressure fluid delivery, commonly uses Q235 and Q235B materials.
★EN 10219: European standard for cold-formed welded structural hollow sections in carbon steel.
Material Properties of Carbon Steel Round Welded Pipe
★Common Materials: Q195, Q235, Q345, ASTM A36, SS400, and API 5L line pipe steels.
★Mechanical Strength:
Grade B (API 5L or ASTM A53): Yield strength of 35,000 psi (241 MPa).
Grade X52: Yield strength of 52,000 psi (359 MPa), allowing thinner walls under high pressure.
★Weight: Approximate weight per meter can be calculated using:
W = (OD - t) × t × 0.02466 (where W in kg/m, OD and t in mm).
Surface Treatment & Coating
To enhance corrosion resistance:
★Black (as-welded): Basic finish, often used in internal structures.
★Galvanized: Zinc-coated for outdoor or humid environments (per ASTM A53 or GB/T 3091).
★Coatings: 3PE (three-layer polyethylene), fusion-bonded epoxy (FBE), or coal tar enamel for pipeline burial.
