Description
Factory-Direct ERW Pipe Supply — every ASTM A53 ERW welded steel round pipe rolls off our own production lines with original mill test certificates, eliminating middleman markups for bulk pipeline and structural buyers.
Technical Specifications
| Parameter | Value |
|---|---|
| Designation | ASTM A53 Q235 ERW Welded Steel Round Pipe |
| Product Type | ERW Welded Steel Round Pipe |
| Steel Grade | ASTM A53 (Grade A, B), ASTM A106 (Grade B, C), API 5L (Gr. A, B, X42, X52, X60, X70), Q195, Q235, Q235B, Q345, Q345B, S235JR, S275JR, S355J2, SS400 |
| Standard | ASTM A53, ASTM A106, ASTM A213, API 5L, DIN EN 10217-1, EN 10219, EN 10210, JIS G3466, GB/T 9711 |
| Section Shape | Round |
| Size Range | Outer Diameter 14 – 1200 mm |
| Wall Thickness | 1 – 50 mm |
| Length | 6000 mm / 12000 mm or Customized |
| Technique | ERW (Electric Resistance Welded) / Hot Rolled / Cold Rolled |
| Surface Treatment | Black Painted / Varnished / Galvanized (Hot-Dip / Electro) / 3LPE / 3LPP Coated / Oiled |
| Tolerance | ±1% |
| Ends | Plain / Beveled / Threaded |
| Application | Oil & Gas Pipeline, Fluid Transport, Structural Frameworks, Scaffolding, Machinery, Shipbuilding, Boiler & Petrochemical Pipelines |
| MOQ | 1 Ton |
| Origin | Shandong, China |
Application Suitability
| Industry | Typical Applications |
|---|---|
| Oil & Gas Transmission | Onshore and offshore pipeline networks, gathering lines, flow lines with API 5L grades and 3LPE anti-corrosion coating |
| Construction & Infrastructure | Building frames, scaffolding systems, bridge support columns, airport terminal structures using ASTM A53 and S355J2 grades |
| Industrial Machinery | Hydraulic cylinders, pneumatic conveying systems, machine tool frames requiring precision tolerance ERW pipes |
| Shipbuilding & Marine | Deck piping, ballast water systems, structural members exposed to saline environments with galvanized or coated protection |
| Petrochemical & Power | Boiler tubes, heat exchanger lines, steam transport pipes meeting ASTM A106 and A213 specifications |
Where Wall-Thickness Tolerance Decides Pipeline Acceptance on Site
A ±1% tolerance on a 50 mm wall Sch40 pipe means the difference between passing hydrostatic testing and failing inspection at the destination port.
Global procurement teams frequently encounter pipes that arrive with wall thickness drifting beyond acceptable limits, particularly on heavy-wall orders destined for high-pressure oil and gas transmission. When a 20-foot container of API 5L X52 ERW welded steel round pipe reaches a Middle East job site and the ultrasonic thickness gauge reads below minimum spec on multiple joints, the entire shipment faces rejection — regardless of how competitive the original FOB price appeared. [NEED_CITE: API 5L line pipe dimensional tolerance requirements] Fragmented sourcing from multiple mills without unified quality control compounds this risk, as each supplier interprets tolerance bands differently. Our production lines maintain consistent ±1% tolerance across the full 14–1200 mm OD range, verified by in-house ultrasonic testing before any ASTM A53 ERW welded steel round pipe leaves the facility.
Matching Pipeline and Structural Requirements Through Grade Selection
The ASTM A53 ERW welded steel round pipe covers pressure-containing applications from low-pressure fluid conveyance to high-pressure gas transmission, depending on grade and wall thickness. API 5L X42 through X70 grades serve oil and gas operators requiring higher yield performance for long-distance transmission lines, while Q235 and S235JR grades suit structural frameworks where formability and weldability take priority over pressure rating. Our 2,800+ specification inventory allows buyers to consolidate structural round pipe, pipeline-grade pipe, and machinery tube into a single container load — a consolidation approach that reduces coordination overhead for EPC contractors sourcing across multiple disciplines.
Engineering Compliance and Certification Alignment
Round pipe used in load-bearing structural frames must comply with EN 10210 or EN 10219 in European markets, while North American projects specify ASTM A53 or A500. The ASTM A53 ERW welded steel round pipe we produce carries CE certification under EN 10210/10219, enabling direct customs clearance into EU member states without additional testing delays. [NEED_CITE: CE marking requirements for structural hollow sections under EN 10210] For oil and gas pipelines, API 5L certification and original mill test certificates documenting chemical composition and mechanical properties per heat number satisfy operator qualification requirements. Wall thickness from 1 mm to 50 mm covers everything from instrument tubing to heavy-wall pressure vessels, with beveled ends ready for field welding on pipeline spreads.
Understanding ERW Process and Grade Systems
Electric Resistance Welding produces a longitudinal weld seam by passing high-frequency current through the steel strip edges, creating a forge weld without filler metal. This process delivers dimensional consistency superior to SSAW for diameters below 600 mm, while maintaining cost advantages over seamless pipe in non-critical pressure applications. The ASTM A53 ERW welded steel round pipe we manufacture uses hot-rolled coil as feedstock, with the weld seam subsequently heat-treated to normalize the microstructure — matching base metal properties across the joint. Steel grade selection follows project specification: Q235 and Q345 dominate Chinese-standard projects, S235JR through S355J2 serve European structural work, while API 5L grades X42–X70 address pipeline transmission requirements. Surface treatment choices — black painted for indoor structural use, hot-dip galvanized for atmospheric corrosion protection, 3LPE coated for buried pipeline service — each address specific environmental exposure conditions.
Hidden Costs When Material Traceability Breaks Down
Procuring ASTM A53 ERW welded steel round pipe without verified mill test certificates creates downstream liability when project inspectors request heat number traceability. A shipment lacking proper documentation faces customs holds, third-party inspection re-tests at buyer expense, and potential rejection if chemical composition cannot be verified against the specified grade. [NEED_CITE: material traceability requirements in EN 10219 structural hollow sections] Negative tolerance abuse — where actual wall thickness consistently falls at the lower limit — reduces pressure rating margin and triggers rejection during hydrostatic testing on pipeline projects. The cost of replacing rejected pipe on a remote job site, including demurrage, re-shipping, and project delay penalties, typically exceeds the original material cost by several multiples.
Procurement Confidence Through Verified Supply Chain
Our factory-direct model eliminates trading company margins, passing volume pricing directly to bulk buyers purchasing ASTM A53 ERW welded steel round pipe in container-load quantities. Every heat produced undergoes three-stage inspection in our in-house laboratory, with original mill test certificates issued per shipment documenting chemical composition and mechanical properties. Third-party inspection through SGS or BV is available upon request for projects requiring independent verification. Our professional export team handles container loading optimization — critical for 12-meter length pipes where improper stowage causes transit damage — and prepares complete customs documentation including packing lists, bills of lading, and certificates of origin. Long-term partners receive volume discount reviews every six months and dedicated account management for repeat orders.
Documentation & Compliance
- Mill test certificate documenting ASTM A53 Grade B chemical composition and mechanical properties per heat number, issued with every shipment
- CE certificate under EN 10210/EN 10219 for structural hollow sections, enabling EU market access without additional testing
- ISO 9001:2015 quality management system certificate covering the full production process from coil receipt to final inspection
- SGS or BV third-party inspection report available upon request for projects requiring independent material verification
- Material traceability documentation linking each pipe to its heat number, enabling full chain-of-custody verification for pipeline operators
- Complete customs documentation package including packing list, bill of lading, certificate of origin, and commercial invoice
Packaging, Loading & Delivery
- ASTM A53 ERW welded steel round pipe bundled with steel strips in seaworthy packaging, with 12-meter lengths loaded longitudinally to maximize container utilization
- Black painted surfaces protected with plastic end caps and interleaving materials to prevent coating damage during ocean transit
- Galvanized pipe bundles include edge protectors to preserve zinc coating integrity, with moisture-resistant wrapping for humid climate destinations
- 3LPE coated pipeline pipes receive specialized cradle support during loading to prevent coating abrasion, with wooden separators between layers
- Heat number and grade identification marked on each pipe end with stenciled markings, accompanied by bundle tags for rapid site identification
- FOB, CIF, and DDP shipping terms available with professional container loading plans optimizing weight distribution for 20-foot and 40-foot equipment
Requesting Specification-Specific Pricing and Certification
Submit your ASTM A53 ERW welded steel round pipe requirements including outer diameter, wall thickness, grade, quantity, and destination port to receive factory-direct pricing with volume discount consideration. Our technical team responds within 12 hours with quotation, delivery timeline, and available mill test certificate documentation. Non-standard dimensions and custom length requests receive individual evaluation against our 2,800+ specification inventory.
Frequently Asked Questions
Q: Can you provide mill test certificates for API 5L grades on ASTM A53 ERW welded steel round pipe orders?
A: Yes, every shipment includes original mill test certificates documenting chemical composition and mechanical properties per heat number. For API 5L grades including X42, X52, X60, and X70, certificates confirm compliance with API 5L specification requirements. Third-party inspection through SGS or BV is available upon request.
Q: What surface treatment options are available for corrosion protection?
A: We offer black painted or varnished finishes for indoor applications, hot-dip galvanizing for atmospheric corrosion protection, electro-galvanizing for uniform coating thickness, and 3LPE/3LPP anti-corrosion coating for buried pipeline service. Oiled surfaces are available for temporary protection during transit and storage.
Q: Can you produce non-standard outer diameters or wall thicknesses outside your listed range?
A: Our 2,800+ specification inventory covers standard sizes from 14 mm to 1200 mm OD with wall thickness from 1 mm to 50 mm. Custom orders outside standard ranges are evaluated based on production feasibility and minimum order quantities. Typical production lead times apply for non-standard specifications.
Q: How do you handle container loading for 12-meter length pipes?
A: Our export team develops detailed loading plans for each shipment, optimizing weight distribution and securing methods for long-length ASTM A53 ERW welded steel round pipe. Proper cradle support, wooden separators, and steel strip bundling prevent transit damage. Loading plans account for destination port handling equipment and final site access constraints.
Q: What is the minimum order quantity for trial orders?
A: We accept trial orders starting from 1 ton, enabling new customers to verify material quality and our service capabilities before committing to larger volumes. Volume discount programs activate for long-term partners with recurring procurement needs.
Request Factory-Direct Pricing with Full Documentation
Submit your ASTM A53 ERW welded steel round pipe specifications including diameter, wall thickness, grade, quantity, and destination to receive competitive pricing with mill test certificates. Contact our export team for technical consultation and delivery scheduling.
Shandong Xin Jiyuan Special Steel Tube Co., Ltd
Website: www.sdxinjiyuan.com
Tel: +86 531 8573 6315
Mobile/WhatsApp/WeChat: +86 188 5315 7756
Email: admin@sdxinjiyuan.com
Address: No.11889, Jingshi West Road, Lulian Group, Jinan City, Shandong Province, China
