Description
Factory-Direct Bulk Supply — 3 production lines running simultaneously with monthly capacity exceeding 20,000 tons of ASTM A252 spiral welded carbon steel round pipe, eliminating middleman markups on every container shipped.
Technical Specifications
| Parameter | Value |
|---|---|
| Designation | ASTM A252 Spiral Welded Carbon Steel Round Pipe |
| Product Type | Round Steel Pipe / Spiral Welded Steel Pipe |
| Steel Grade | Q195, Q235, Q345, S235JR, S275JR, S355JR, SS400, St37, St52, ASTM A36, ASTM A53, ASTM A106, ASTM A500, 20#, 10#, 16Mn |
| Standard | GB/T 3091-2001, GB/T 13912-2002, BS 1387, ASTM F1083, ASTM A252, ASTM A500, ASTM A53, ASTM A106 |
| Section Shape | Round |
| Size Range | Outer Diameter 10–1000 mm |
| Wall Thickness | 1–80 mm |
| Length | 1–12 m (6 m / 6.4 m / 12 m standard, customized available) |
| Technique | ERW / Hot Rolled |
| Surface Treatment | Hot Rolled / Oiled or Non-oiled / Consumer’s requirement |
| Tolerance | ±1% |
| Ends | Plain (default); Beveled / Threaded available on request |
| Application | Fluid delivery / Construction pipe / Structural pipe / Curtain wall / Machinery parts / Oil pipe / Hydraulic pipe / Boiler pipe |
| MOQ | 1 Ton |
| Origin | Shandong, China |
Application Suitability
| Industry | Typical Applications |
|---|---|
| Infrastructure & Construction | Piling foundations, structural frames, curtain wall support systems, fence posts |
| Industrial Fluid Transport | Water supply lines, gas distribution, chemical fertilizer pipelines, hydraulic systems, boiler feed pipes |
| Energy & Agriculture | Greenhouse frameworks, solar farm mounting structures, machinery components, drill pipe casings |
What Wall-Thickness Tolerance Costs on a Structural Frame Order
A ±1% tolerance on a 10 mm wall spiral pipe means the difference between passing load calculations and failing third-party inspection at the destination port.
When procurement teams source an ASTM A252 spiral welded carbon steel round pipe for piling or structural work, the wall thickness directly governs load-bearing capacity. A negative tolerance drift of even 0.3 mm on a thick-wall section can reduce the theoretical weight enough to trigger rejection during SGS or BV复检 at the discharge port. I have seen entire shipments held at West African ports because the actual measured thickness fell below the minimum specified in the purchase order — not by much, but enough for the inspector to flag non-conformance. The cost is not just the pipe; it is the crane time, the delay penalties, and the re-procurement cycle that follows. [NEED_CITE: dimensional tolerance requirements for structural steel pipe in EN 10219 and ASTM A500]
Matching OD and Wall Thickness to Piling and Structural Load Requirements
For piling applications under ASTM A252, the outer diameter range of 10–1000 mm covers everything from small-diameter anchor piles to large-diameter foundation cylinders. Wall thickness from 1–80 mm allows engineers to specify heavier sections for high-load bearing zones while using lighter gauges for non-structural bracing. We produce these pipes across Q235, Q345, S235JR through S355JR, and ASTM A36/A53 grades, so a single procurement order can cover multiple structural zones on the same project without splitting across suppliers.
Engineering Compliance and Certification for International Projects
Structural pipes destined for European markets must carry CE marking under EN 10210 or EN 10219, while North American projects typically require ASTM A252 or A500 compliance with full mill test documentation. Our ASTM A252 spiral welded carbon steel round pipe ships with original mill test certificates covering chemical composition and mechanical properties per heat number. For projects in the Middle East or Southeast Asia, third-party inspection by SGS or BV can be arranged before container loading to verify wall thickness, diameter, and weld seam quality on-site. [NEED_CITE: CE marking requirements for structural hollow sections under EN 10210]
Steel Grade Selection and Welding Process Fundamentals
The Q-series grades (Q195, Q235, Q345) follow the Chinese GB standard system where the number indicates minimum yield strength in MPa. The S-series (S235JR, S275JR, S355JR) follows the European EN system with similar yield strength progression and added impact toughness designations. ASTM A36, A53, A106, and A500 represent the American specification framework. For spiral welded pipe, the ERW and hot-rolled processes produce a continuous helical weld seam suitable for large-diameter, thick-wall sections where seamless manufacturing becomes cost-prohibitive. Surface treatment options — hot rolled finish, oiled, or custom coating — are selected based on the corrosion environment: oiled finish for indoor structural use, hot rolled for general exposure, and custom coatings for aggressive chemical or marine conditions.
Hidden Costs of Sourcing Without Verified Mill Certificates
Pipes supplied without traceable mill test certificates create compounding risks: customs authorities in strict-import markets may detain the shipment, engineers cannot verify grade equivalence for structural calculations, and end clients may reject the material during project handover. An ASTM A252 spiral welded carbon steel round pipe without proper documentation is essentially unverified scrap in the eyes of a compliance officer. The real cost surfaces when a batch of Q345 pipe arrives without chemistry data, and the project engineer cannot confirm whether it meets the specified yield strength for seismic zone calculations. [NEED_CITE: steel grade equivalence mapping between GB, EN, and ASTM standards]
Why Bulk Buyers Source Spiral Welded Pipe from Our Facility
We operate 3 dedicated production lines with a full inventory covering 2,800+ specifications, meaning standard sizes of ASTM A252 spiral welded carbon steel round pipe ship from ready stock while custom orders turn around in typical production lead times. Every batch is tested in our in-house laboratory with three-stage inspection covering dimensional accuracy, weld seam integrity, and mechanical properties. Our factory-direct pricing structure eliminates trading company margins, and volume discount programs reward long-term procurement partnerships. We hold ISO 9001:2015, Lloyd’s CE (EN 10210/10219), and FPC certifications, and we accommodate SGS or BV third-party inspection on request. Our export team handles container loading optimization — critical for heavy pipe shipments where improper stowage leads to damaged ends and wasted freight cost.
Documentation & Compliance
- Mill test certificate documenting Q235/Q345/S355JR chemical composition and mechanical properties per heat number, conforming to ASTM A252 or EN 10219 as specified
- CE certificate covering EN 10210/EN 10219 structural hollow section requirements for European market delivery
- ISO 9001:2015 quality management certificate validating production process controls across all 3 lines
- SGS or BV third-party inspection report available upon request, covering wall thickness measurement, dimensional verification, and visual weld inspection before container sealing
- Full material traceability by heat number linking each pipe to its original slab chemistry and rolling records
- Complete customs documentation package including packing list, bill of lading, and certificate of origin for destination-country clearance
Packaging, Loading & Delivery
- Heavy-wall ASTM A252 spiral welded pipes bundled with steel strips and edge protectors to prevent coating damage and end deformation during ocean transit
- Oiled or non-oiled surface finish applied per customer specification, with wrapping protection for oiled pipes to preserve rust-preventive film during humid-climate shipping
- Container loading plans optimized for mixed-diameter orders — large OD pipes loaded as base layer with smaller diameters nested to maximize 20ft and 40ft container payload
- Custom cutting to 6 m, 6.4 m, or 12 m lengths available, with length tolerance marked on each pipe end for工地 receiving verification
- Heat number and steel grade stenciled on each pipe for site-level traceability and inspection matching
- FOB, CIF, and DDP shipping terms available with professional export documentation handling for ports across Southeast Asia, Middle East, Africa, and South America
Request a Bulk Quote with Mill Test Documentation
Submit your required outer diameter, wall thickness, steel grade, quantity, and destination port to receive a competitive bulk quotation with volume pricing, delivery timeline, and sample mill test certificates for quality verification. Our team responds within 12 hours with FOB/CIF terms and container loading recommendations for your specific size mix.
Start Your ASTM A252 Pipe Procurement
Send your specifications via email or WhatsApp to receive factory-direct pricing and mill test documentation 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@sdxinjiyuan.com
Frequently Asked Questions
Q: How do Q235 and Q345 grades map to S235JR/S355JR and ASTM equivalents?
A: Q235 corresponds closely to S235JR in yield strength and chemical composition, while Q345 aligns with S355JR. For American standard projects, ASTM A36 serves as the general structural equivalent to Q235/S235JR, and ASTM A572 Grade 50 maps to Q345/S355JR. We provide grade cross-reference documentation with every shipment to support customs clearance and engineering approval.
Q: What documentation is provided, and can SGS or BV inspect before loading?
A: Every batch of ASTM A252 spiral welded carbon steel round pipe ships with original mill test certificates covering chemical composition and mechanical properties per heat number. Third-party inspection by SGS or BV can be arranged before container loading to verify wall thickness, diameter, length, and weld seam quality at our facility.
Q: Can non-standard outer diameter or wall thickness be ordered, and what is the minimum quantity?
A: We produce custom OD and wall thickness within the 10–1000 mm diameter and 1–80 mm thickness range. The minimum order quantity is 1 ton for both standard and custom specifications. Custom orders typically require typical production lead times, while standard sizes ship from ready stock.
Q: When should I specify oiled versus hot rolled surface finish?
A: Oiled finish is suitable for indoor structural applications or short-term storage where light rust prevention is needed. Hot rolled finish works for general construction and piling applications where the pipe will be coated or painted after installation. For aggressive marine or chemical environments, custom coating such as 3PE or epoxy can be specified.
Q: How are mixed-size round pipes loaded for container shipping?
A: Our export team designs container loading plans that nest smaller-diameter pipes inside larger ones and stack bundles to maximize payload per container. Mixed-size orders sharing one container are standard practice, and we provide loading diagrams before sealing for your approval.
