Description
Factory-direct ERW welded round steel pipes — Produced on 3 dedicated lines with in-house physical and chemical laboratories, covering OD 10–1000 mm and wall thickness up to 80 mm under ASTM A53, A500, and A106 standards.
Technical Specifications
| Parameter | Value |
|---|---|
| Designation | ASTM A53 / A500 ERW Welded Round Steel Pipe |
| Product Type | ERW Welded Round Steel Pipe |
| Steel Grade | Q195, Q235A-B, Q345A-E, 20#, 10#, 16Mn, ASTM A36, ASTM A500, ASTM A53, ASTM A106, SS400, St37, St52, S235JR, S355JR, Grade B, X42, X52, X60, X70, L245, L290, L360, L390, L415 |
| Standard | ASTM A53, ASTM A500, ASTM A106, GB/T 3091-2001, GB/T 13912-2002, BS 1387, ASTM F1083, JIS G3444 |
| Section Shape | Round |
| Size Range (OD) | 10–1000 mm |
| Wall Thickness | 1–80 mm |
| Length | 6–12 m (or customized) |
| Technique | ERW / Hot Rolled |
| Surface Treatment | Black Painting / Oiled / Non-oiled |
| Tolerance | ±1% |
| Ends | Plain / Beveled / Threaded (available upon request) |
| Application | Fluid transport, boiler systems, structural frameworks, fencing, greenhouse structures, curtain walls, machinery parts, construction plumbing, chemical fertilizer pipelines |
| MOQ | 5 Tons |
| Origin | Shandong, China |
Application Suitability
| Industry | Typical Applications |
|---|---|
| EPC Contractors | Water, gas, and oil transmission pipelines; boiler feed lines; chemical fertilizer distribution networks |
| Construction Companies | Structural columns and trusses; curtain wall support frames; high-rise plumbing risers |
| Machinery Manufacturers | Hydraulic cylinder barrels; conveyor roller tubes; precision machined components |
| Infrastructure Developers | Perimeter fencing systems; greenhouse structural frames; bridge handrail posts |
What Negative Wall Tolerance Really Costs on a Plumbing Project
A 5% negative tolerance deviation turns a compliant shipment into a rejected container at the destination port.
Early in my career, I watched a full container of ASTM A53 round pipes get held at a Southeast Asian port because the actual wall thickness fell far below the theoretical specification. The buyer’s third-party inspector caught it during pre-delivery verification. The cargo sat at the dock for weeks while both sides argued over who absorbed the loss. That kind of quality gap does not just mean a refund dispute — it means project delays, re-procurement costs, and broken trust with the end client. When sourcing an ASTM A53 A500 ERW welded round steel pipe supplier, the mill’s inspection protocol matters far more than the price per ton. [NEED_CITE: EN 10219 dimensional tolerance requirements for welded hollow sections]
Matching Wall Thickness and Grade to Fluid Transport Demands
Our ERW welded round pipes span OD 10–1000 mm with wall thickness from 1 mm to 80 mm, covering everything from small-bore plumbing risers to large-diameter transmission lines. For low-pressure water and gas distribution, grades like Q195 and ASTM A53 Grade B provide adequate strength at competitive cost. When the project moves into higher-pressure oil pipelines or structural load-bearing frames, stepping up to Q345, ASTM A500 Grade C, or API grades such as X42 and X52 ensures the pipe meets the required burst pressure and yield criteria. Each ASTM A53 A500 ERW welded round steel pipe we ship carries a heat-number traceable mill test certificate, so the grade on the stamp matches the chemistry in the lab report.
Structural Compliance and Surface Protection for Site Conditions
Load-bearing frames and scaffolding must conform to engineering codes such as EN 1993 or AISC 360, which reference specific steel grade properties and dimensional tolerances. [NEED_CITE: AISC 360 structural steel specification requirements] Selecting the correct grade — for instance S355JR for European projects or ASTM A500 Grade B for North American structural work — directly affects whether the design passes third-party engineering review. Surface treatment choice follows the exposure environment: oiled finish suits indoor structural use where temporary rust prevention is sufficient, while black painting provides a base coat for outdoor fencing and greenhouse frames that will receive final painting on site. For projects in coastal or high-humidity zones, specifying a thicker wall within tolerance range compensates for long-term corrosion allowance. End preparation — plain, beveled, or threaded — is coordinated with the field connection method to avoid costly re-cutting at the installation stage.
Understanding ERW Process and Grade Selection Across Standards
ERW (Electric Resistance Welding) forms the pipe by rolling steel strip into a cylinder and fusing the seam through high-frequency current, producing a continuous weld bead that is trimmed flush. This process suits medium-diameter pipes with consistent wall thickness at lower cost compared to seamless alternatives. Our production covers grades across three major systems: the Chinese Q-series (Q195 through Q345), the European S-series (S235JR, S355JR per EN 10219), and the American ASTM system (A53, A500, A106, A36). [NEED_CITE: steel grade equivalence mapping between ASTM A53 and EN 10219 standards] For API line pipe applications, grades X42 through X70 and L245 through L415 are available for oil and gas transmission where higher yield strength and weldability are critical. Wall thickness tolerance is held at ±1%, verified at incoming material, in-process, and final inspection stages in our in-house laboratory. This ensures the actual weight per meter stays within acceptable deviation from theoretical calculations — a factor that directly affects both structural performance and shipping cost accuracy.
Hidden Costs When Material Certification Falls Short
Pipes that arrive without proper mill test certificates or with grade markings that do not match the delivered chemistry create compounding problems. Customs authorities in the EU require CE marking under EN 10210/EN 10219 for structural hollow sections; shipments without valid documentation face rejection or extended hold periods. [NEED_CITE: CE marking requirements for structural steel under EN 10210] Beyond customs, a pipe stamped ASTM A53 but delivering the chemistry of a lower grade creates structural liability — the engineer’s calculations assumed a specific yield point, and substitution without documentation voids the design certification. Replacing rejected pipe after it reaches the job site costs multiples of the original material price when you factor in demurrage, re-shipping, and idle labor.
Why Procurement Teams Source This ASTM A53 A500 ERW Welded Round Steel Pipe From Us
We operate three dedicated ERW production lines with in-house physical and chemical laboratories, meaning every heat of steel is tested before it moves to the next production stage — no outsourcing the quality check. Our catalog covers over 2,800 specifications across round pipes, square and rectangular tubes, plates, coils, and section steel, so a single purchase order for a mixed-specification project does not require coordinating with four different vendors. We hold CE certification under EN 10210/EN 10219, ISO 9001:2015, Singapore FPC, and third-party verification from SGS and BV, covering the documentation requirements for EU, North American, and Southeast Asian customs clearance. Our 41 invention patents include proprietary sharp-corner rectangular tube technology — a capability that fills specification gaps competitors cannot address. Every shipment includes professional container loading optimization, because a 12-meter pipe loaded without a proper bracing plan arrives bent. We have exported to over 50 countries with a trade team that handles technical documentation, special packaging requests, and door-to-door logistics coordination.
Documentation & Compliance
- Mill test certificate documenting ASTM A53 Grade B chemical composition and mechanical properties per heat number
- CE certificate under EN 10210/EN 10219 for structural hollow sections destined for EU member states
- ISO 9001:2015 quality management system certificate covering the full production and inspection workflow
- SGS or BV third-party inspection report available upon request for independent pre-shipment verification
- Full material traceability linking each pipe to its heat number, chemical analysis, and tensile test results
- Complete customs document package including packing list, bill of lading, and certificate of origin
Packaging, Loading & Delivery
- ERW welded round pipes bundled with steel strips and edge protectors to prevent surface damage to the black painting or oiled finish during ocean transit
- Oiled pipes wrapped with waterproof cloth at both ends to prevent moisture ingress and rust formation on the bare pipe edges
- Container loading optimized for 6 m and 12 m lengths using nested bundling for smaller OD pipes (10–200 mm) and single-layer staging for large-diameter sections (500–1000 mm)
- Custom cut-to-length service available for non-standard project requirements, with cut ends deburred and re-oiled before packing
- Each bundle labeled with heat number, steel grade, OD, wall thickness, and length for on-site identification and traceability
- Shipping terms available include FOB, CIF, and DDP with real-time tracking and port coordination for destination clearance
Getting Your Quotation and Mill Documentation Ready
Send your specification sheet — including OD, wall thickness, length, steel grade, quantity, and destination port — and we return a detailed quotation within 12 hours covering unit price, production lead time, applicable certifications, and payment terms. For non-standard dimensions or mixed-grade project orders, we provide a consolidated procurement plan with a single delivery schedule. You can request material samples and original mill test certificates before committing, so your engineering team verifies the chemistry and dimensional compliance against the project specification.
Frequently Asked Questions
Q: How do ASTM A53 and ASTM A500 grades compare to EN 10219 S235JR and S355JR?
A: ASTM A53 Grade B and EN 10219 S235JR occupy similar yield strength ranges for general structural and fluid transport use. ASTM A500 Grade C and EN 10219 S355JR serve higher-load structural applications. We provide cross-reference documentation and can supply grade equivalence certificates for projects requiring dual-standard compliance.
Q: Can you provide third-party inspection and mill test certificates for customs clearance?
A: Yes. Every shipment includes an original mill test certificate with chemical composition and mechanical properties. We accept SGS or BV third-party inspection for pre-shipment verification, and our CE certification under EN 10210/EN 10219 covers structural hollow section exports to the EU.
Q: What is the MOQ for non-standard OD or wall thickness, and what is the lead time?
A: The standard MOQ is 5 tons. For non-standard dimensions outside our regular catalog, we evaluate based on production line setup requirements and provide a custom quotation with confirmed lead time. Typical production lead times apply to standard specifications.
Q: When should I choose black painting versus oiled finish for different environments?
A: Oiled finish provides temporary rust prevention for indoor storage and short transit periods, suitable for pipes that will be further processed or painted on site. Black painting offers a more durable base coat for outdoor applications like fencing and greenhouse frames where the pipe will receive a final topcoat. For highly corrosive environments, we discuss additional protection options during the quotation stage.
Q: Do you offer FOB, CIF, or DDP shipping, and how do you handle container loading for heavy pipes?
A: We support FOB, CIF, and DDP terms. Our loading team designs container plans based on pipe OD, wall thickness, and length to maximize weight utilization while ensuring the cargo arrives without deformation. We provide real-time shipment tracking and coordinate with forwarding agents for destination port clearance.
Request Your ASTM A53 A500 ERW Welded Round Steel Pipe Quotation
Submit your specifications — OD, wall thickness, grade, quantity, and destination — via email, WhatsApp, or phone, and receive a detailed quotation with mill test certificate confirmation within 12 hours.
Shandong Xin Jiyuan Special Steel Tube Co., Ltd
Website: www.sdxjysteel.com
Tel: +86 531 8573 6315
Mobile/WhatsApp/WeChat: +86 188 5315 7756
Email: admin@sdxjysteel.com
Address: No.11889, Jingshi West Road, Lulian Group, Jinan City, Shandong Province, China
