Description
API 5L SSAW spiral welded steel pipe supplier — Factory-direct SSAW and ERW pipe from Jinan, no trading markup, full MTC traceability per heat number.
Technical Specifications
| Parameter | Value |
|---|---|
| Designation | Q235 SSAW Spiral Welded Steel Pipe |
| Product Type | SSAW Welded Steel Pipe |
| Steel Grade | Q195, Q235, Q345, S235JR, S275JR, S355JR, Gr.A, Gr.B, ASTM A53, ASTM A106, SS400, St37, St52, 20#, 10#, 45# |
| Standard | API 5L, ASTM A53, ASTM A106, GB/T 8162, GB/T 8163, GB 5310, EN 10219, EN 10210, JIS G3452, JIS G3454, DIN 2448, GOST 8732 |
| Section Shape | Round |
| Outer Diameter | 10–1000 mm |
| Wall Thickness | 1–120 mm |
| Length | 1–12 m (customized) |
| Technique | SSAW / ERW / Hot Rolled |
| Surface Treatment | Black painted / Varnished / Anti-corrosive oil / Galvanized / Oiled / Non-oiled |
| Tolerance | ±1% |
| Ends | Plain / Beveled / Threaded / Socket |
| Packing | Standard Seaworthy Packing with steel strips |
| Application | Fluid transport / Chemical fertilizer pipeline / Hydraulic pipeline / Boiler pipe / Drill pipe / Building pipeline / Structural pipeline / Mechanical parts / Industrial pipeline |
| MOQ | 1 Ton |
| Origin | Shandong, China |
Application Suitability
| Industry | Typical Applications |
|---|---|
| Oil & Gas Pipeline | API 5L SSAW mainline and distribution pipe, 3PE coated, beveled ends for field welding |
| EPC Infrastructure | Structural columns, trusses, and purlins for industrial sheds and warehouse frames |
| Water & Wastewater | Municipal water transmission, irrigation mains, and drainage culverts |
| Machinery & Equipment | Hydraulic cylinder bodies, conveyor rollers, and machine base frames |
| Building Construction | Greenhouse frames, guardrail posts, curtain wall supports, and scaffolding tubes |
Where Wall-Thickness Tolerance Decides Project Acceptance on SSAW Pipe Orders
A minus-8% wall reading on API 5L pipe will fail SGS re-inspection at destination port and hold the entire container.
I once watched a batch of SSAW pipe get detained at Jebel Ali because the mill let wall thickness drift well beyond standard tolerance. The contractor’s third-party inspector flagged it immediately — replacement certs had to be air-freighted, and a 15% discount was negotiated just to keep the relationship alive. Pipeline specs do not forgive sloppy mill control. When you source an API 5L SSAW spiral welded steel pipe supplier without an in-house physical and chemical lab, you are gambling that every heat meets the tolerance band. [NEED_CITE: API 5L dimensional tolerance requirements for SSAW pipe]
Matching OD and Wall Thickness to Pressure and Structural Load
An API 5L SSAW spiral welded steel pipe with OD up to 1000 mm and wall thickness up to 120 mm covers everything from low-pressure water mains to high-pressure gas transmission lines. For structural applications such as building frames and guardrail posts, Q235 or S235JR grades provide adequate yield strength at lower cost. When the design calls for higher load-bearing capacity — heavy industrial platforms, bridge piers, or crane booms — stepping up to Q345 or S355JR shifts the safety margin without changing the outer diameter. The ±1% tolerance on wall thickness, verified batch by batch in our own lab, keeps theoretical weight calculations aligned with actual delivered weight, which matters when your structural engineer signs off on load tables.
Engineering Code Compliance and Surface Protection for Corrosive Environments
SSAW pipe produced to API 5L, ASTM A53, or EN 10219 must carry traceable mill test certificates that match heat numbers stamped on each length. For EU-bound projects, CE certification under EN 10210 or EN 10219 is non-negotiable at customs — missing paperwork means the container sits at the port while your crane idles on site. [NEED_CITE: EN 10219 cold-formed hollow section compliance for structural steel] Surface treatment selection follows the service environment: black painted or varnished finish suits indoor structural use; galvanized coating extends service life for outdoor guardrails and scaffolding exposed to rain; 3PE anti-corrosion coating is standard for buried oil and gas pipelines where soil chemistry accelerates external corrosion. Beveled ends prepare the pipe for field girth welding, while plain or threaded ends serve mechanical connections in hydraulic and boiler systems.
Steel Grade Equivalence Across EN, ASTM, and GB Systems
One of the most common procurement errors is ordering Q235 when the drawing calls for S235JR or Gr.B — these grades are chemically and mechanically interchangeable under most conditions, but the mill test certificate must state the correct designation or the inspector will reject the material. [NEED_CITE: steel grade equivalence between EN 10219 and ASTM A53 standards] Our API 5L SSAW spiral welded steel pipe supplier capability covers Q195 through Q345, the full S235JR–S355JR range, API Gr.A and Gr.B, plus ASTM A53 and A106 — so a single purchase order can supply pipe for EU, North American, and Middle East projects without splitting sourcing across three mills. SSAW process suits large-diameter, thick-wall pipe where spiral seam geometry distributes hoop stress evenly; ERW is preferred for smaller OD and tighter dimensional tolerance; seamless pipe handles the highest pressure ratings where no weld seam is acceptable.
The Hidden Cost of Buying SSAW Pipe Without Verified Mill Control
Material substitution — receiving Q195 when you paid for Q345 — does not show up until the structural engineer pulls coupons for tensile testing. By then, the pipe is already cut, welded, and erected. Rework costs multiply: crane time, welder hours, replacement material, and schedule delays that push liquidated damages. Certification gaps create a parallel risk: a missing CE mark on EN 10219 pipe bound for Rotterdam means customs holds the shipment, demurrage accrues daily, and the project manager explains to the client why the steel frame is three weeks behind. [NEED_CITE: consequences of missing CE certification for structural steel imports into EU] Negative tolerance abuse — where a supplier ships pipe at the low end of the tolerance band and invoices on theoretical weight — quietly transfers cost to the buyer through reduced load capacity and shorter corrosion life.
Why Xin Jiyuan Is the Right API 5L SSAW Spiral Welded Steel Pipe Supplier
Xin Jiyuan operates three dedicated production lines in Jinan with in-house physical and chemical laboratories that test every heat for composition, yield, tensile, and impact before release — no outsourcing the quality gate. We hold 41 invention patents, including proprietary sharp-corner rectangular tube technology, and our 2,800+ specification range means you can source SSAW, ERW, seamless, and structural section in a single order instead of coordinating four suppliers. CE certification under EN 10210 and EN 10219, ISO 9001:2015, Singapore FPC, and SGS/BV third-party inspection acceptance keep your customs and client audit files clean. Custom non-standard sizes,定尺切割, and special packaging are handled in-house, and our logistics team optimizes container loading for 20ft and 40ft shipments with FOB, CIF, and DDP options to 50+ countries.
Documentation & Compliance
- Mill test certificate documenting Q235 and Q345 chemical composition, yield strength, and tensile properties per API 5L and GB/T 8163, traceable by heat number
- CE certificate under EN 10210 and EN 10219 for structural hollow section compliance on EU-bound SSAW pipe orders
- ISO 9001:2015 quality management certificate covering full production and inspection workflow
- SGS or BV third-party inspection report available for pre-shipment verification at buyer’s request
- Material traceability sheet linking each pipe length to heat number, chemical analysis, and mechanical test results
- Full customs document package including packing list, bill of lading, and certificate of origin for destination clearance
Packaging, Loading & Delivery
- Q235 and Q345 SSAW pipe bundled with high-tensile steel strips in seaworthy packaging, with edge protectors to prevent coating damage on galvanized or 3PE-coated lengths
- Black painted or oiled surface protected by plastic wraps at both ends to block moisture during ocean transit to Southeast Asia and Middle East ports
- Container loading optimized for 1–12 m lengths: 20ft container carries approximately 27 tons at 5.8 m pipe length, 40ft container fits up to 28 tons below 11.8 m
- Custom cut-to-length service available for 1–12 m定尺, reducing on-site welding and scrap for EPC infrastructure projects
- Heat number and steel grade stenciled on each pipe end for site traceability and inspector verification before welding
- FOB Jinan/Qingdao, CIF, and DDP logistics options with real-time tracking to 50+ countries across EU, North America, India, and the Middle East
Start Your SSAW Pipe Inquiry with Full Specifications
Submit your outer diameter, wall thickness, steel grade, quantity, and destination port, and our team returns a detailed quotation including unit price, production lead time, applicable certifications, and mill test certificate format within 12 hours. For non-standard sizes or special surface treatment requirements, share your drawing or specification sheet and we confirm feasibility and tooling lead time. You will receive the complete documentation package — MTC, CE certificate, packing list, and bill of lading — before the container leaves the port.
Frequently Asked Questions
Q: What is the difference between SSAW, ERW, and seamless pipe, and how do I choose?
A: SSAW (spiral submerged arc welded) pipe suits large diameters from 219 mm to 1000 mm and thick walls up to 120 mm, commonly used for oil and gas transmission and water mains. ERW (electric resistance welded) pipe covers smaller diameters with tighter tolerance, ideal for structural and mechanical applications. Seamless pipe handles the highest pressure ratings where no weld seam is permitted. Selection depends on OD, pressure class, and applicable standard — API 5L typically calls for SSAW or seamless, while ASTM A53 structural work often uses ERW.
Q: Can you provide mill test certificates for API 5L and ASTM A53 on the same order?
A: Yes. Our in-house lab issues EN 10204 3.1 mill test certificates per heat number, and we can supply separate MTCs for API 5L Gr.B and ASTM A53 Gr.B pipe on a mixed order. Third-party inspection by SGS, BV, or Lloyd’s Register is accepted and coordinated at our facility before shipment.
Q: How do you handle surface treatment for corrosive environments?
A: For buried pipelines, we apply 3PE anti-corrosion coating per DIN 30670 or CAN/CSA Z245.21. For outdoor structural applications exposed to weather, hot-dip galvanized coating per ISO 1461 extends service life. Indoor or temporary installations use black painted or oiled finish at lower cost. Surface treatment is selected based on soil chemistry, humidity, and design service life.
Q: What is your MOQ and can you supply custom non-standard sizes?
A: MOQ is 1 ton. We produce 2,800+ standard specifications and accept custom non-standard OD, wall thickness, and length requests. Share your drawing or specification, and our engineering team confirms feasibility, tooling requirement, and production lead time.
Q: Do you provide loading optimization and door-to-door logistics?
A: Yes. Our logistics team prepares professional loading plans for 20ft and 40ft containers based on your pipe lengths and quantities, maximizing weight utilization and minimizing freight cost. We offer FOB, CIF, and DDP terms with real-time tracking to ports across EU, North America, India, Southeast Asia, and the Middle East.
Get Your API 5L SSAW Pipe Quote with Full Certification Package
Send your specifications — OD, wall thickness, steel grade, quantity, and destination — to receive a detailed quotation and mill test certificate sample 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
