Description
Factory-Direct ERW Pipe Pricing — We manufacture Large Diameter ERW Welded Round Steel Pipe in-house with 3 dedicated production lines, eliminating trading margins on orders from 5 tons upward.
Technical Specifications
| Parameter | Value |
|---|---|
| Designation | Q235 S355 20# 16Mn ERW Welded Round Steel Pipe |
| Product Type | ERW Welded Round Steel Pipe |
| Steel Grade | Q195, Q235, Q355, S355, 20#, 45#, 16Mn, A36, A53, A106, ST35, ST52 |
| Standard | API 5L, ASTM A53, ASTM A106, ASTM A252, ASTM A500, ASME B36.10M, BS EN10219, BS EN10296, GB/T 3091, GB/T 9711 |
| Section Shape | Round |
| Size Range | 6–1820 mm OD |
| Wall Thickness | Hot rolled 4–20 mm / Cold rolled 1–4 mm |
| Length | 1–12 m |
| Technique | ERW / Hot Rolled |
| Surface Treatment | Hot Rolled / Slightly Oiled |
| Tolerance | ±1% |
| Ends | Plain / Beveled |
| Application | Fluid transport, Boiler, Gas & Oil pipeline, Chemical fertilizer, Building industry, Machinery, Structural engineering |
| MOQ | 5 Tons |
| Origin | Shandong, China |
Application Suitability
| Industry | Typical Applications |
|---|---|
| EPC Contractors | Oil & gas transmission pipelines, chemical plant process piping, boiler feedwater systems |
| Construction Companies | High-rise structural columns, bridge pile casings, foundation piling |
| Machinery Manufacturers | Hydraulic cylinder barrels, conveyor rollers, crane boom sections |
| Infrastructure Developers | Water supply mains, drainage culverts, piling for port and jetty structures |
What Negative Wall Tolerance Really Costs on a Pipeline Order
A ±1% tolerance on a 20mm wall sounds tight on paper — until the mill ships -12% and your SGS retest at destination port fails the entire lot.
I watched a 40-container order of large-diameter pipe get rejected at Dubai customs because the actual wall thickness drifted far below the purchase spec. The buyer paid for air-freight replacement steel and lost three months on a pipeline deadline. [NEED_CITE: EN 10219 dimensional tolerance requirements for cold-formed hollow sections] When you source Large Diameter ERW Welded Round Steel Pipe across multiple vendors, each with different tolerance practices, you inherit coordination risk on top of material risk. Missing or forged mill test certificates compound the problem — customs officers in the EU and Middle East now routinely hold shipments without verifiable EN 10204 3.1 documentation.
Matching Pipe Dimensions to Structural and Pressure Demands
Large Diameter ERW Welded Round Steel Pipe in the 6–1820 mm OD range covers both low-pressure fluid conveyance and load-bearing structural roles. For piling and column work, the hot-rolled wall range of 4–20 mm provides the section modulus engineers need, while the ±1% tolerance keeps weight calculations reliable for foundation design. Our in-house physical and chemical lab tests every heat before the pipe leaves the line, so the MTC you receive matches the steel that arrives on your job site.
Engineering Compliance Across Regions and Standards
This pipe conforms to API 5L, ASTM A53, ASTM A106, EN 10219, and GB/T 9711, covering the majority of structural and pressure specifications across EU, North American, and Asian projects. [NEED_CITE: steel grade equivalence mapping between EN 10219 and ASTM A500] CE certification under EN 10210/EN 10219 clears European customs without additional testing, while ASTM-designated grades satisfy AISC-referenced structural calculations. Beveled ends per request allow direct butt-weld preparation on-site, reducing secondary machining time for pipeline tie-ins and structural moment frames.
Decoding the Steel Grade and ERW Process Choices
The Q-series (Q195, Q235, Q355) follows the Chinese GB standard with yield strength designations, while S355 aligns with the European EN system — both deliver comparable structural performance when properly certified. The 20# and 45# grades serve machined applications where carbon content affects hardness and wear resistance, and 16Mn adds manganese for improved low-temperature toughness in cold-climate piling. ERW welding uses high-frequency current to fuse the longitudinal seam, producing a weld zone that meets the same ultrasonic inspection criteria as the parent metal. [NEED_CITE: ERW weld seam quality standards per API 5L and EN 10219] Compared to seamless pipe, ERW offers shorter lead times and tighter dimensional consistency on large diameters above 300 mm OD, while the slightly oiled hot-rolled surface protects against transit corrosion without interfering with downstream coating or welding.
The Hidden Price of Unverified Pipe Procurement
Ordering Large Diameter ERW Welded Round Steel Pipe based on price alone often surfaces costs later: rejected weld procedures due to unexpected carbon equivalents, structural re-engineering when actual wall thickness falls short, or customs detention from incomplete CE documentation. [NEED_CITE: consequences of non-conforming steel materials in structural engineering projects] A pipe that passes visual inspection at the port may still fail ultrasonic testing on the weld seam — a defect that only a mill with in-process NDT equipment can catch before shipment. The real cost is not the per-ton price difference; it is the crane idle time, the redesign fee, and the liquidated damages for missing a project milestone.
Why Procurement Teams Return for Repeat Orders
We run three dedicated ERW lines producing over 2,800 specifications in-house, so your 1820 mm OD order does not get brokered to a third-party mill you have never audited. Every heat is tested in our own physical and chemical laboratory, and the resulting Mill Test Certificate travels with the cargo — no separate “certificate sourcing” required. Our 41 patented technologies include proprietary processes that maintain weld integrity on thick-wall ERW joints, a detail that matters when your inspector probes the seam at destination. CE, ISO 9001:2015, and Singapore FPC certifications are maintained continuously, not obtained for a single order. We also handle professional loading plans for large-diameter pipe, where nesting and weight distribution determine whether you fit 25 tons or 18 tons per container.
Documentation & Compliance
- Mill Test Certificate documenting Q235 and S355 chemical composition and mechanical properties per EN 10219 and ASTM A53
- CE certificate confirming compliance with EN 10210/EN 10219 for structural hollow sections exported to EU markets
- ISO 9001:2015 quality management certificate covering the full ERW production and inspection process
- SGS or BV third-party inspection report available for pre-shipment verification of wall thickness, OD, and weld seam quality
- Full material traceability by heat number linking each pipe to its original slab chemistry and rolling record
- Customs document package including packing list, Bill of Lading, and Certificate of Origin for destination clearance
Packaging, Loading & Delivery
- Large diameter ERW pipes bundled with steel strips and edge protectors to preserve the slightly oiled hot-rolled surface during ocean transit
- Beveled-end pipes fitted with plastic caps on both ends to prevent thread damage and moisture ingress for 20# and S355 grades
- Professional nesting loading plans for 1–12 m lengths maximize container payload, critical for heavy-wall 4–20 mm pipes in the 600–1820 mm OD range
- Heat number and steel grade stenciled on each pipe end for on-site traceability matching the Mill Test Certificate
- FOB, CIF, and DDP shipping options with real-time tracking from Jinan port to destinations across the EU, Middle East, Southeast Asia, and North America
- Custom length cutting available within the 1–12 m range to reduce on-site welding joints for pipeline and piling applications
Starting Your ERW Pipe Procurement
Send your specification sheet — OD, wall thickness, steel grade, quantity, and destination port — and receive a detailed quotation within 12 hours, including unit pricing, applicable certifications, and estimated production schedule. Request the Mill Test Certificate format and SGS inspection scope upfront so your engineering team can verify compliance before the deposit is placed.
Request Your Large Diameter ERW Pipe Quote with Full Certification Package
Submit your pipe specifications, steel grade, and destination to receive factory-direct pricing and Mill Test Certificate samples within 12 hours.
Shandong Xin Jiyuan Special Steel Tube Co., Ltd
Tel: +86 531 8573 6315
Mobile/WhatsApp/WeChat: +86 188 5315 7756
Email: admin@sdxjysteel.com
Website: www.sdxjysteel.com
Frequently Asked Questions
Q: How do ERW welded round pipes compare to seamless pipes for fluid transport applications?
A: Large Diameter ERW Welded Round Steel Pipe offers shorter lead times and more consistent dimensional tolerance on diameters above 300 mm OD, making it cost-effective for low-to-medium pressure fluid conveyance. Seamless pipes remain preferable for high-pressure or high-temperature services where the absence of a weld seam is specified by design codes.
Q: How can buyers verify the authenticity of the Mill Test Certificate?
A: Each MTC references a specific heat number stenciled on the pipe end, and the chemical composition and mechanical properties are traceable to our in-house laboratory records. Buyers may also request SGS or BV third-party inspection before shipment to independently confirm the test results.
Q: What is the optimal loading strategy for large diameter pipes in standard containers?
A: Pipes in the 600–1820 mm OD range are loaded using professional nesting plans that interlock smaller and larger diameters to maximize container weight capacity. Our logistics team prepares the loading scheme before production to confirm the most economical shipping arrangement for your order.
Q: Do you support custom cutting and beveling for on-site welding preparation?
A: Yes. Pipes can be cut to custom lengths within the 1–12 m range, and beveled ends are available per your welding procedure specification. This reduces secondary machining at the job site and accelerates pipeline or structural assembly timelines.
Q: What is the difference between theoretical weight and actual weight for settlement?
A: Settlement can be based on theoretical weight calculated from the specified OD, wall thickness, and length, or on actual weighbridge weight at the loading port. The ±1% tolerance on wall thickness means the variance between the two methods remains minimal for ERW pipe produced under controlled conditions.
