Product Overview
ASTM A53 Welded Carbon Steel Pipe is manufactured in strict compliance with ASTM A53 / ASME SA53 standards. It is engineered for low-to-medium pressure pipelines, water transmission systems, structural frames, and mechanical applications.
Produced via High-Frequency Electric Resistance Welding (ERW), this pipe ensures stable seam quality and consistent mechanical performance across production batches.
Specifications
| Items | Description |
| Outer Diameter (OD) / Size Range | 21.3mm – 609.6mm |
| Technique | High-Frequency Welded |
| Type | Welded |
| Material | Carbon Steel (Non-Alloy) |
| Section Shape | Round |
| Wall Thickness (W.T) | 1.0 – 20mm |
| Length | 3 – 12m |
| Tolerance | ±1–5% |
| Pipe Ends | Plain / Beveled / Threaded / Grooved |
| Standard | ASTM A53, AS1074, BS1387, AS1163, ISO R65 |
| Certificate | ISO 9001 |
| Grade | Grade A, Grade B, Grade 250, Grade 350 |
| Surface Treatment | Lightly Oiled, Black Painted, Varnished, Hot Dipped Galvanized |
| Main Applications | Low-pressure fluid transport (water, gas, air, steam), structural scaffolding, piling, fencing, and machinery manufacturing. |
| HS Code | 73063090 |
| Origin | Tianjin, China |
| Production Capacity | 120,000 Metric Tons / Year |
| Packing & Transport | Bundled with waterproof plastic tarpaulin wrapping |
| Payment Terms | Sight L/C, 30% T/T |
| Trade Terms | FOB / CFR / CIF |
Product Advantages
Available in Type E (Grade A/B) across Schedule 40/80 to meet global pressure and mechanical specifications.
Online seam annealing normalizes the weld line to prevent splitting during field bending and flattening.
Every pipe undergoes continuous eddy current and 5-second hydrostatic testing up to 2,500 PSI to verify wall integrity.
Hot-dip galvanized coatings maintain a minimum 550 g/m² zinc weight for verifiable outdoor atmospheric corrosion protection.
Value-Added Services Available
Precision Pipe Cutting & Beveling: Custom cut-to-length services with precise beveling angles for seamless field welding.
Anti-Corrosion Coatings: Advanced external 3LPE, FBE (Fusion Bonded Epoxy), or internal liquid epoxy linings tailored for underground applications.
Threading & Coupling: Heavy-duty NPT threading fully compliant with ASME B1.20.1 specifications, supplied with protective couplings.
Quality Inspection & Testing Process
Raw Material Audit: We only use steel coils from Tier-1 mills with traceable heat numbers.
Online Inspection: Continuous Eddy Current testing during the ERW process.
Hydraulic Pressure Test: 100% of pipes are tested according to ASTM A53 Section 9.
Visual & Dimensional Check: Strict verification of OD, wall thickness, and length before packaging.
Shipping & Packing Details
Container Loading Capacity: Approximately 25-27 Metric Tons per 20GP container (depending on port weight limits).
Rust Prevention: Lightly oiled/varnished surface for standard black pipes; minimum 550 g/m² zinc layer for galvanized pipes. Suitable for up to 3 months of maritime transit.
Documentation Provided with Shipment
Complete Traceability Documentation:
Mill Test Certificate (MTC) per EN 10204 3.1
Third-Party Inspection (TPI) Report (SGS/BV if requested)
Commercial Invoice, Detailed Packing List, and Certificate of Origin (Form E/FTA to reduce tariffs).
FAQ
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