API 5L Spiral Weld Pipe
group namePipeline for Oil And Gas
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Min Order25 ton
brand nameCangzhou Spiral Steel Pipe Manufacturers
modelAPI 5L Pipe-001
payment methodL/C, T/T
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update timeFri, 14 Aug 2026 11:48:38 GMT
Paramtents
Certificate API 5L, CE, ISO9001,CNAS
Special Pipe API 5L line Pipe
Technique Submerged arc welding
Outside Diameter 219-3620mm
Grade Grade B, X42, X52, X60,X65,X70,X80,X100
Processing Service SSAW
Length 1M-30M or Custom
Section Shape Round
Welding Method Submerged arc welding
Product Name API 5L Spiral Welded Pipe
Packging & Delivery
Min Order25 ton
Briefing
Your API 5L Spiral Weld Pipe — Up to 30 Meters Long, Tested in a CNAS-Accredited Lab, Made in China
Detailed
Your API 5L Spiral Weld Pipe — Up to 30 Meters Long, Tested in a CNAS-Accredited Lab, Made in Cangzhou
Let's cut to what matters.
You need API 5L spiral weld pipe that holds pressure, passes inspection, and arrives when you need it. And you'd rather deal with the mill that actually makes the pipe, not a trader who's never seen the production floor.
You're in the right place.
Two things set us apart from every other spiral weld pipe mill you'll talk to. First, we can make your pipe up to 30 meters long — while most of the industry stops at 18. Second, every batch is tested in our in-house CNAS-accredited laboratory — that's China's national accreditation, equivalent to ISO/IEC 17025. [Request Your Quote →]
Full API 5L Spiral Weld Pipe Specifications
Use this table to check against your project requirements.
| NO. | Name | Property |
| 1 | Standard | API 5L PSL1 & PSL2(46th / 47th Edition) |
| 2 | OD Range | 219mm – 3620mm |
| 3 | Wall Thickness | 6mm – 25.4mm |
| 4 | Length | Up to 30m |
5 | Grades | B, X42, X52, X60, X70, X80, X100,etc |
6 | Testing Lab | CNAS-Accredited |
7 | MTC | EN 10204 3.1 / 3.2 |
8 | External Coating | 3LPE, 3LPP, FBE, epoxy, coal tar enamel,HDG |
9 | End Type | Plain end, beveled end |
10 | Hydrostatic Test | 100% per API 5L |
11 | NDT | UT full weld length, X-ray inspection |
12 | Internal Coating | Epoxy lining, cement mortar lining,HDG |
13 | Mechanical Testing | Tensile, Charpy impact, hardness, guided bend |
14 | Testing Laboratory | CNAS-accredited, ISO/IEC 17025 compliant |
15 | Documentation | EN 10204 3.1 MTC (3.2 available) |
Pipe Length Up to 30 Meters — While Others Stop at 18
Here's what most mills won't tell you.
The standard spiral weld pipe production line is designed to handle finished pipe up to 18 meters. That's the industry ceiling for the vast majority of manufacturers. Their forming line, their handling equipment, their hydro tester — everything is built around an 18-meter limit.
Our production line is different. We invested in extended forming, handling, and testing capability that delivers finished spiral weld pipe up to 30 meters in a single joint.
What does 30 meters mean for your project?
Fewer welds on your pipeline.
Every time you join two pipes on site, you add cost, time, and a potential failure point. A 12-meter pipe means more girth welds than an 18-meter pipe. An 18-meter pipe means more girth welds than a 30-meter pipe. It's simple math.
| Pipe Length | Number of Joints (3km pipeline) | Girth Welds Required |
| 12 meters | 250 pipes | 249 welds |
| 18 meters | 167 pipes | 166 welds |
| 30 meters | 100 pipes | 99 welds |
Fewer welds means:
✅ Lower welding costs — less labor, less consumables
✅ Faster installation — your project finishes sooner
✅ Fewer NDT inspections — less third-party testing to pay for
✅ Lower risk — every weld is a potential defect location. Fewer welds = fewer chances of failure
And here's something else. On a large-diameter pipeline — say OD 1422mm or larger — each girth weld can take a full day to complete, inspect, and coat. Cut your weld count by 40%, and the schedule impact isn't linear. It's exponential. You're looking at weeks saved on a major project.
Not every order needs 30 meters. Sometimes your shipping method or installation plan calls for shorter lengths. That's fine. We produce standard 6m, 12m, and 18m lengths every day. The point is: when your project benefits from longer pipe, we're the mill that can deliver it.
CNAS-Accredited In-House Laboratory — Your Pipe Is Tested to a Higher Standard
Anyone can put "we test our pipes" on a website. Walk into most pipe mills, and you'll find basic testing equipment — maybe a hydro press, a basic UT machine, some sample prep tools. The operator runs the test, scribbles down numbers, and that's your "quality control."
That's not how we work.
Cangzhou Spiral Welded Steel Pipe Group operates a CNAS-accredited laboratory.
CNAS — the China National Accreditation Service for Conformity Assessment — is China's national accreditation body. A CNAS-accredited lab operates under ISO/IEC 17025, the international standard for testing and calibration laboratories. This is the same standard that governs labs in Germany, the UK, Japan, and the United States.
The significance of CNAS certification to you
| 🌍 International Mutual Recognition | 🔍 Regular Audit | 📋 Complete traceability | 🧪 Full Testing |
| ILAC mutual recognition, recognized by over 100 countries | Not a one-time certification, regular review | Each pipe can be traced back to the furnace number | Chemistry/Mechanics/Metallography/NDT Full Item |
We can test what other mills outsource:
Chemical analysis (OES spectrometer)
Tensile testing (ambient and elevated temperature)
Charpy V-notch impact testing (room temp, 0°C, -20°C, -40°C)
Hardness testing (Brinell, Rockwell, Vickers)
Guided bend testing
Metallographic examination
Hydrostatic pressure testing
Ultrasonic and X-ray NDT validation
Bottom line: When your pipe arrives with our MTC, the numbers on that certificate aren't just "checked." They're verified in a nationally accredited laboratory that meets the same standards as the best labs in the world.
Why Buying from Our Works for You
Cangzhou isn't just where we happen to be. It's China's steel pipe manufacturing hub — raw material suppliers, coating facilities, logistics providers, and skilled labor all concentrated in one region.
| ⏱️ Shorter Lead Times | Raw materials, production, coating, and packaging are completed in the same area | ||
| 💰 Lower Total Cost | Centralized supply chain eliminates hidden logistics costs | ||
🔍 Easy Inspection | Complete all factory inspections and quality checks at one location | ||
🚢 Fast Port Access | Less than 2 hours away from Tianjin Port, the largest port in northern China | ||
Where Your API 5L Spiral Weld Pipe Will Be Used
Oil & Gas Transmission
Large-diameter trunk lines, gathering systems, high-pressure gas pipelines. Our X52 to X70 spiral weld pipe in 30-meter lengths reduces your girth weld count significantly. Add 3LPE coating, and your pipeline is built for decades.
Water Supply & Municipal Engineering
Long-distance water transfer, municipal water mains, drainage systems. Spiral weld pipe with cement mortar lining offers large diameters at a cost that beats seamless alternatives. And 30-meter lengths mean fewer joints on long water lines.
Piling & Marine Construction
Ports, bridges, offshore platforms, foundation piling. Our heavy-wall spiral weld pipe handles driving stress. Beveled ends ready for site welding, lengths up to 30 meters for deep pile applications where fewer splices matter.
Structural & Industrial Use
Wind turbine towers, conveyor structures, building columns. Round hollow sections with tight dimensional tolerances, custom lengths to match your fabrication sequence.
How We Make and Test Your Pipe
Step 1
Raw Material Inspection
Step 2
Straightening
Step 3
Spiral Forming & Welding
Step 4
NDT Testing
Step 5
CNAS Lab Mechanical Test
Step 6
Hydrostatic Test
Step 7
Coating & Finishing
Step 8
Final Inspection & Packing
FAQ
Q: How do I know your lab is really CNAS-accredited?
Ask us for our CNAS certificate number. You can verify it directly on the CNAS official website. We'll provide it without hesitation. Try asking that to a mill that doesn't have one — watch their reaction.
Q: Can you really make 30-meter pipe, or is that just marketing?
We can. Our production line is designed and equipped for finished pipe lengths up to 30 meters — forming, welding, testing, coating, and handling. We'll show you on a video call if you want proof.
Q: What if I don't need 30 meters? Is it more expensive to buy from you?
Not at all. We produce standard 6m, 12m, and 18m lengths every day. Your price for standard lengths is competitive with any Cangzhou mill. The 30-meter capability is an option you have when your project benefits from it — not a requirement you pay for.
Q: What's your typical lead time?
Standard API 5L grades and dimensions: 15–30 days from order confirmation. Custom lengths or special coating specifications may extend this. We give you a firm delivery date before you commit, and we stick to it.
Q: Do you handle coating in-house?
Yes. 3LPE, 3LPP, FBE, coal tar enamel, epoxy lining, cement mortar lining — our coating operations are integrated into our production flow, not outsourced. That means no extra logistics, no finger-pointing between suppliers.
Q: How do you handle quality disputes?
Honestly and quickly. If our pipe genuinely doesn't meet the agreed specification, we make it right. Our CNAS lab data and full traceability mean we can pinpoint exactly where any issue originated. In over a decade of operation, most "disputes" are resolved by sharing the test data.
Q: Are you a real manufacturer or a trading company?
We are a manufacturer. Cangzhou Spiral Welded Steel Pipe Group is a production enterprise with our own facility, equipment, and workforce in Cangzhou. You can visit unannounced, send a third-party inspector, or video call us and ask us to walk the production floor. We'll prove it.
Q: What is API 5L SSAW pipe, and how is it different from other API 5L welded pipe?
API 5L SSAW pipe (Spiral Submerged Arc Welded pipe) is a type of API 5L welded pipe where the steel coil is formed at a spiral angle and welded using submerged arc welding — both inside and outside. Compared to ERW or LSAW pipe, SSAW offers larger diameter capability, better cost efficiency for big OD, and more flexible length options. At Cangzhou Spiral Welded Steel Pipe Group, this is the only product we make — so we understand it deeper than multi-product mills.
Q: What does the API 5L pipe specification cover?
The API 5L pipe specification defines requirements for seamless and welded steel pipe used in oil, gas, water, and structural applications. It covers two product specification levels (PSL1 and PSL2), multiple steel grades from API 5L Gr.B steel pipe up to API 5L X65 steel pipe and beyond, and sets standards for chemical composition, mechanical properties, hydrostatic testing, and non-destructive inspection.
Q: Do you offer API 5L Gr.B steel pipe for water and low-pressure applications?
Yes. API 5L Gr.B steel pipe is one of our most commonly produced grades. It's widely used for water supply, drainage, irrigation, and general structural applications. We stock standard dimensions in Gr.B and can produce custom lengths up to 30 meters. Available with external coating (3LPE, FBE) and internal cement mortar lining for potable water projects.
Q: Can you supply API 5L X65 steel pipe with full documentation?
Yes. We supply API 5L X65 steel pipe with EN 10204 3.1 Mill Test Certificate as standard, and 3.2 with third-party witnessing upon request. All mechanical testing — tensile, Charpy impact, hardness, guided bend — is performed in our CNAS-accredited in-house laboratory. Chemical composition is verified by OES spectrometer. Every heat number is fully traceable.
Q: Do you offer API 5L Gr.B steel pipe for water and low-pressure applications?
Yes. API 5L Gr.B steel pipe is one of our most commonly produced grades. It's widely used for water supply, drainage, irrigation, and general structural applications. We stock standard dimensions in Gr.B and can produce custom lengths up to 30 meters. Available with external coating (3LPE, FBE) and internal cement mortar lining for potable water projects.
Q: Is your API 5L carbon steel pipe suitable for sour service?
Our API 5L carbon steel pipe is produced per API 5L PSL2 with additional testing as required. For sour service applications (H₂S environments), we can supply with supplementary HIC (Hydrogen-Induced Cracking) and SSC (Sulfide Stress Cracking) testing per NACE MR0175. Please specify your sour service requirements when you inquire, and we'll confirm material capability.
Q: What's the difference between API 5L PSL1 and PSL2 in your API 5L welded pipe?
For our API 5L welded pipe:
PSL1 — Standard quality level. Covers basic chemical and mechanical requirements. Suitable for general-purpose applications like water lines, piling, and structural use.
PSL2 — Enhanced quality level. Mandatory Charpy impact testing, stricter chemical composition limits (carbon equivalent control), and 100% non-destructive inspection of the weld seam. Required for oil and gas transmission pipelines where API 5L X65 steel pipe and similar high-strength grades are specified.
We produce both PSL1 and PSL2 across all grades from API 5L Gr.B to X70.
Q: Can you provide a full API 5L pipe specification sheet for my project?
Absolutely. Just send us your project requirements — we'll return a complete API 5L pipe specification datasheet with the exact grade, OD, wall thickness, length, and testing protocol that matches your application. This helps you confirm material compliance before you place an order.
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- Nearest port for product export
- Tianjin Port, Port of Tangshan
- Delivery clauses under the trade mode
- FOB, CFR, CIF, EXW, FCA
- Acceptable payment methods
- T/T, L/C