Cangzhou Spiral Steel Pipes Group Co.ltd
The Solid Foundation for Project SuccessSpiral Welded Pipe for Gas Transmission
Spiral Submerged-Arc Welded Pipe (SSAW) for gas transmission. OD 219–3620mm, grades X42–X80, API 5L PSL1/PSL2 compliant. CNAS-accredited lab ensures 100% NDT and hydro testing. Precision beveling, threading, and anti-corrosion coatings available. One-stop supply – ready to weld on site.
Key Advantages at A Glance
| Advantage | Value to Customer |
| Broad Size Coverage | Φ219mm – Φ3620mm, X42–X80 full range – one supplier, all sizes |
| CNAS-Accredited Lab | Internationally recognized test reports – every pipe fully traceable |
| Precision Finishing | Beveling / Threading / Custom Cutting / Coatings – ready to install, shorten site construction time |
Applicable Standards | API 5L PSL1/PSL2 · GB/T 9711 · CSA Z245.1 |
Applications
✓ Long-Distance Oil & Gas Transmission Pipelines
✓ City Gas Distribution Networks
✓ Natural Gas Field Gathering Dry Gas Laterals
✓ Chemical & Process Gas Piping
✓ LNG Terminals and Facilities
Technical Specifications
| Name | Range | Remark |
| Outside Diameter | Φ219mm – Φ3620mm | Full range from small-bore to ultra-large-diameter mainlines |
| Wall Thickness | 6mm – 24.5mm or custom | Precisely customized per design pressure requirements |
| Single Pipe Length | 6m – 30m (or customized) | Longer pipes reduce field girth weld count |
Steel Grade | GR.B / L245 – L555 (X42–X80) | Full range of line pipe steel grades |
Standards | API 5L PSL1/PSL2, GB/T 9711, CSA Z245.1, ASTM A252 | Meets major international code requirements |
Manufacturing Process | Double-sided Submerged-Arc Welding (SAW) | Continuous spiral forming with stable weld quality |
Precision Finishing Capabilities
| Finishing Type | Capability Description |
| Pipe End Beveling | Standard 30° bevel or custom compound bevel per drawings; precision-machined with carbide alloy tooling |
| Pipe End Threading | NPT / BSP standard thread machining with couplings supplied |
| Custom Length Cutting | Precision cut to specified lengths per project requirements – ready to use on arrival |
Anti-corrosion Coatings | 3LPE / 3LPP / FBE (Fusion Bonded Epoxy) / Cement Mortar Lining |
Surface Treatment | Bare pipe / Anti-rust paint / Galvanized – optional per project needs |
CNAS-Accredited Laboratory – Quality Assurance
Internationally Recognized Testing Capability
Our factory is equipped with a CNAS (China National Accreditation Service for Conformity Assessment) accredited laboratory, conforming to ISO/IEC 17025 international standards. Test reports issued are mutually recognized across multiple countries and regions worldwide.
Full-Process Quality Control
Raw Material Incoming Inspection → In-Process Production Testing → Finished Product Comprehensive Inspection
100% Non-Destructive Testing (NDT)
Every single weld undergoes:
✓ Full-body Automatic Ultrasonic Testing (UT)
✓ X-Ray Real-Time Imaging Inspection
✓ 100% Hydrostatic Pressure Test per pipe
Mechanical & Physical Performance Testing
Chemical Composition Analysis · Tensile / Impact / Bend Tests
Hardness Testing · Metallographic Examination
Why Choose Spiral Welded Pipe for Gas Projects?
① Superior Stress Distribution
Under identical internal pressure, the principal stress on the spiral weld seam is only 75%–90% of that on a straight seam welded pipe – delivering higher safety margins for high-pressure gas transmission.
② Extended Single Pipe Length Reduces Girth Welds
Continuous coil forming enables single pipe lengths of up to 24 meters, significantly reducing the number of field girth welds – lowering installation costs and minimizing potential leakage points.
③ Significant Cost Advantage for Large Diameters
Narrower steel coils can be used to produce large-diameter pipes, achieving high material utilization – particularly economical for long-distance trunkline projects.
④ Mature and Reliable Manufacturing Process
The double-sided submerged-arc welding process is well-proven and stable. Combined with a 100% NDT quality system, it has been widely applied in natural gas pipeline projects both domestically and internationally.
Certifications & Accreditations
Frequently Asked Questions (FAQ)
Q1: What is the minimum order quantity (MOQ)?
MOQ typically ranges from 200 to 500 tons depending on specifications. Smaller quantities may be negotiable for standard sizes.
Q2: What is the typical lead time?
Standard specification orders are generally delivered within 30–45 days after contract signing. Lead time varies by specification and order volume.
Q3: Can samples be provided?
Yes, small samples are available for quality verification. Please contact us for details.
Q4: What is the export packaging method?
Bare packing / bundled / covered with waterproof fabric. Plastic end caps can be added to protect threads and bevels – suitable for ocean freight.
Q5: Can third-party inspection be arranged?
Yes, we can coordinate third-party inspection services such as SGS, BV, or other accredited agencies for surveillance or final inspection per project requirements.
Need A Reliable Spiral Welded Pipe Supplier For Your Gas Project?
Our Commitment:
Free technical selection consultation · Customized solutions per project requirements · Prompt response
Contact Information:
📧 Email: [richard@ssawpipe.com]
📞 Phone/WA: [+86 15822968134]
💬 WeChat: [icemm001]
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