Products Description
| COMMODITY NAME | Carbon Steel Round Welded Pipe |
| MATERIAL GRADE | Q195 = S195 / A53 Grade A |
| Q235 = S235 / A53 Grade B / A500 Grade A / STK400 / SS400 / ST42.2 | |
| Q355 = S355JR / A500 Grade B Grade C | |
| STANDARD | ASTM A53 ( sch10; SCH40), ASTM A500, BS1387, EN39, BS1139, ISO65 |
| GB/T3091, GB/T13793 | |
| PIPE SURFACE | GALVANIZED, PAINTED (BLACK, RED, GRAY OR OTHERS) , OR ANTI-RUST OILED |
| PIPE ENDS | PLAIN ENDS / BEVEL ENDS WITH PLASTIC CAPS/ THREADED BOTH ENDS WITH COUPLING AND CAPS/ GROOVED ENDS |
| CERTIFICATES | ISO 9001 / BSI/ UL / FM |
| TRADE TERMS | FOB/ CFR/ CIF/ EXW/ FCA |
| PAYMENT TERMS | 30%&70% T/T ; 100% LC AT SIGHT (others can be negotiated) |
| DELIVERY TIME | 7-30 DAYS AFTER RECEIVE DEPOSIT OR LC |
| BRAND | YOUFA (HOT SALES) |
| HOT SALES MARKET | Southeast Asia, South Asia, Middle East, Europe, Middle&South America, Africa and Oceania |
Dimensions of Carbon Steel Round Welded Pipe
★Outer Diameter (OD): Ranges from 10 mm to 2000 mm (approximately 1/2 inch to 72 inches).
Common sizes: 21.3 mm (1/2"), 48.3 mm (2"), 60.3 mm (2.5"), 114.3 mm (4").
★Wall Thickness: Typically 0.8 mm to 20 mm, 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.
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