Specifications
| Parameter | Details |
| Prouct name | ASTM A53 ERW Steel Pipe |
| Standard | ASTM A53/A53M, ASME SA53, API 5L |
| Type | Type E (Electric Resistance Welded) |
| Grade | Grade B (most commonly used) |
| Outer Diameter | ½ inch to 26 inches (21.3 mm – 660.4 mm) |
| Wall Thickness | SCH10, SCH20, SCH30, SCH40, STD, SCH80, SCH160 |
| Length | SRL (Single Random Length: 4–7m), DRL (Double Random Length: 7–13m), or custom |
| End Finish | Plain End, Beveled End, Threaded (NPT/BSP), Grooved |
| Surface Treatment | Black paint, anti-rust oil, galvanized (HDG), 3PE coating |
Chemical Composition
| Element | Maximum Content (%) | Notes |
| Carbon (C) | ≤ 0.30% | Ensures weldability and ductility |
| Manganese (Mn) | ≤ 1.20% | Enhances strength and toughness |
| Phosphorus (P) | ≤ 0.050% | Controlled to avoid brittleness |
| Sulfur (S) | ≤ 0.045% | Minimizes hot cracking risk |
| Silicon (Si) | ≤ 0.40% | Acts as deoxidizer during welding |
| Iron (Fe) | Balance | Base metal composition |
| Other Residuals | As per ASTM A53 limits | Includes Cu, Ni, Cr, Mo, V, etc. |
Mechanical Properties
| Property | Requirement | Test Standard |
| Tensile Strength | ≥ 415 MPa (60,000 psi) | ASTM A370 |
| Yield Strength | ≥ 240 MPa (35,000 psi) | ASTM A370 |
| Elongation | ≥ 20% (in 2 inches) | Based on cross-sectional area |
| Hardness | Not specified in ASTM A53 | Optional for special applications |
| Hydrostatic Test | Required for every pipe | Pressure = 2× design pressure |
| Flattening Test | Pass without cracking | For welded seam integrity |
| Bend Test | Full wrap without fracture | Evaluates ductility and weld quality |
Manufacturing Process for ASTM A53 ERW Steel Pipe
| Step | Process Description | Key Equipment/Technology |
| 1. Raw Material Input | Hot-rolled steel coils (e.g., Q235B) fed into the mill | Coil handling system |
| 2. Uncoiling & Leveling | Steel strip is straightened and fed continuously | Leveler rolls |
| 3. Edge Conditioning | Strip edges are trimmed and prepared for welding | Edge mill |
| 4. Forming | Roll-formed into a cylindrical shape | Progressive forming stands |
| 5. ERW Welding | High-frequency induction welding fuses the seam | HFI/ERW welder |
| 6. Weld Flash Removal | Excess weld metal is removed internally and externally | Scarfing tools |
| 7. In-line Heat Treatment | Stress-relief annealing improves weld zone properties | Induction heating coil |
| 8. Sizing & Calibration | Ensures precise outer diameter and roundness | Sizing rolls |
| 9. Cooling & Straightening | Controlled cooling followed by straightening | Cooling bed, straightener |
| 10. Cutting & Inspection | Cut to length; hydro, UT, visual checks performed | Flying saw, NDT systems |
| 11. Coating & Packaging | Surface protection applied; bundled for shipment | Spray booth, strapping machine |
Product Advantages
| Advantage | Description |
| Cost Efficiency | ERW process is more economical than seamless or SAW pipes |
| High Production Speed | Continuous manufacturing enables fast delivery (within 20–30 days) |
| Good Mechanical Performance | Meets pressure and structural requirements for diverse applications |
| Easy Processing | Can be welded, bent, threaded, and grooved without special tools |
| Corrosion Resistance (when treated) | Galvanized or 3PE-coated versions suitable for outdoor and harsh environments |
| Global Standard Compliance | Accepted under ASTM, API, ISO, and CE standards for international trade |
Export Projects
ASTM A53 ERW Steel Pipe
| Aspect | Details |
| Main Export Regions | Southeast Asia, Middle East, Africa, South America |
| Typical Projects | Urban water supply networks, industrial plant pipelines, power station auxiliary systems |
| Supply Terms | FOB, CFR, CIF; often with third-party inspection (SGS, BV, DNV) |
| Certifications Required | ISO 9001, API 5L, CE, PED, RoHS (depending on destination) |
| Packaging & Marking | Hexagonal bundles with steel straps; marked with grade, size, heat number, standard |
| Lead Time | 20–30 days after order confirmation |
| Key Chinese Export Hubs | Tianjin,Qingdao,Shanghai,Ningbo |
Products Description
Packing & Loading
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