Spiral Welded Pipe Specifications: Ultimate Guide to Size, Weight, Material, Pressure and Standards
If you purchase spiral welded (SSAW) pipes for piping pipe, industrial fluid pipe, or industrial structural steel pipe, you know how important accurate spiral welded pipe specifications are for your project. The spiral welded pipe sizes, pressure resistance, materials and other parameters you choose directly affect your project safety, construction quality and overall cost. Even small parameter errors can cause installation problems and extra expenses.
For global buyers, engineers and contractors, it avoids complicated jargon and only shares practical SSAW pipe specifications that you can actually use for project design and procurement. You will find standard and custom pipe sizes, weight data, pressure grades, global industry standards, and export packaging rules. You can use this guide to check supplier data and confirm the best pipe specs for your project.
1. Spiral Welded Pipe Standard Sizes (OD, Wall Thickness & Length)
Size is the first thing you need to confirm when buying spiral welded pipes. The biggest advantage of SSAW pipes is their wide size range, especially for large-diameter pipelines that seamless pipes cannot produce easily.
As a professional spiral welded pipe manufacturer in Cangzhou, we support full-size production with complete customizable parameters:
- Outer Diameter (OD): 219mm – 3620mm. We cover small, medium and super-large calibers to fit municipal water projects, industrial pipelines, hydraulic engineering and large infrastructure piling work.
- Wall Thickness (WT): 6mm – 25.4mm. Thin and medium-wall pipes suit low-pressure water and sewage projects, while thick-wall pipes work perfectly for high-pressure transmission and heavy-load foundation piling.
- Standard & Custom Length: Our standard fixed lengths are 6m, 9m and 12m. Equipped with 13 complete production lines, we support custom ultra-long pipes up to 30 meters. Longer pipes greatly reduce on-site welding joints, improve pipeline tightness and speed up your construction progress.
For easier selection, you can match pipe sizes by usage scenario:
219–630mm pipes for urban water supply and drainage;
711–1422mm pipes for municipal sewage and medium-distance fluid delivery;
1620–3620mm large-diameter pipes for water diversion, oil and gas pipelines, and bridge foundation piling.
Large Diameter SSAW Pipe
30 Meter Spiral Welded Pipe
2. Spiral Welded Pipe Weight Standards & Calculation
You need accurate spiral welded pipe weight specifications to calculate project load, shipping cost and bulk order quantity. Pipe weight depends on outer diameter, wall thickness and steel density.
You can calculate the theoretical weight with this simple and universal formula:
Weight per meter (kg/m) = (Outer Diameter – Wall Thickness) × Wall Thickness × 0.02466
We have an independent CNAS-certified laboratory. Every batch of spiral welded pipes undergoes strict weight inspection before delivery. The actual weight is controlled within ±6% of the theoretical weight, fully meeting international acceptance standards. We provide complete weight reports for your on-site inspection and project acceptance.
Own CNAS Certified Laboratory
Online X-Ray Testing
3. Common Spiral Welded Pipe Material Grades
Steel grade decides pipe strength, corrosion resistance and service life. You can choose the right material based on your pipeline medium and working environment. These are the most widely used grades in standardspiral welded pipe specifications:
- Ordinary Carbon Steel (Q235B / Q355B): Cost-effective and stable. Ideal for conventional water supply, drainage and building foundation piling projects.
- Oil & Gas Grade Steel (API 5L Gr.B, X42–X80): Strict quality standards for tensile strength and welding performance. Specially used for petroleum and natural gas transmission pipelines.
- Piling Grade Steel (ASTM A252, ASTM A139): High load-bearing performance. Designed for bridge, port and building foundation engineering.
Water Conveyance Coated Steel Pipe
API 5L SSAW Pipe
ASTM A252 Steel Pipe Pile
4. Spiral Welded Pipe Pressure Grade Specifications
To keep your pipeline running safely, you must select spiral welded pipe pressure grade specifications that match your working conditions. Pipe pressure resistance is determined by diameter, wall thickness and steel grade.
You can follow this simple matching rule for normal-temperature projects:
- Small-diameter thick-wall Q355B pipes: 1.6–4.0 MPa high-pressure transmission
- Conventional-size medium-wall Q235B pipes: 0.6–1.6 MPa medium & low-pressure municipal pipelines
- Large-diameter thin-wall pipes: ≤0.6 MPa low-pressure water delivery and drainage
Relying on our in-house CNAS laboratory, all finished pipes pass strict hydrostatic testing. We test every pipe at 1.5 times the rated working pressure to ensure stable and safe long-term operation.
5. Global Industry Standards for SSAW Pipes
Different countries and industries require different pipeline execution standards. Choosing the right standard ensures smooth local inspection and project acceptance. These are the most authoritative global SSAW pipe specifications:
- API 5L PSL-1 / PSL-2: International standard for oil and gas pipelines, with strict weld quality and mechanical property requirements
- GB/T 9711: Chinese national standard for oil and gas line pipes, consistent with API international standards
- SY/T 5037: Special standard for low-pressure water and sewage spiral pipelines
- ASTM A252: Global standard for foundation piling spiral welded pipes
- EN 10217: European standard for pressure-bearing welded steel pipes, mandatory for most EU projects
6. Standard vs Non-Standard Spiral Welded Pipe
When placing an order, you can choose standard or custom non-standard spiral welded pipe specifications according to your design drawings.
6.1 Standard Specifications
Standard pipes follow unified international norms with fixed size, thickness and length parameters. With 13 full production lines, we deliver mass standard pipes with stable quality, short lead time and competitive prices, suitable for most conventional projects.
6.2 Non-Standard Custom Specifications
If standard pipes cannot meet your special project needs, we provide full one-stop customization. You can customize special diameters, wall thicknesses and ultra-long lengths (max 30m). All custom pipes are produced and inspected strictly according to your confirmed technical requirements.
7. Practical Technical Specifications
7.1 Pipe End Types
Pipe end style affects your on-site welding efficiency and sealing effect. We provide two standard options:
- Plain End (PE): Flat pipe ends for simple butt welding, suitable for low-pressure conventional pipelines
- Beveled End (BE): Pre-machined 30°–37.5° chamfer, ensuring tight welding for high-pressure pipelines
We can install plastic end caps for all pipes to avoid deformation and damage during long-distance transportation.
7.2 Dimensional Tolerance Standards
All pipe dimensions are tested and certified by our CNAS laboratory to guarantee high-precision installation:
- Outer diameter tolerance: ±0.5% of nominal diameter
- Wall thickness tolerance: -5% ~ +10% of nominal thickness
- Pipe straightness and weld height fully comply with industry standards
7.3 Anti-Corrosion Specifications
Bare steel pipes are the basic version of spiral welded pipe specifications. For buried, humid or outdoor working environments, anti-corrosion treatment is necessary to extend pipe service life.
As a one-stop manufacturer, we provide full in-house anti-corrosion services, including 2PE/3PE external coating, epoxy coal tar pitch coating, FBE epoxy coating, and food-grade internal epoxy coating for drinking water pipelines.
8. Spec Matching Guide for Different Projects
To help you quickly select the right spiral welded pipe specifications, we sorted practical parameter schemes for common engineering scenarios:
- Municipal Water & Sewerage: OD 300–1820mm, WT 6–12mm, Q235B/Q355B, SY/T 5037 standard
- Oil & Gas Transmission: API 5L X-series steel, PSL-1/PSL-2 grade, matched pressure and weld specs
- Foundation Piling: Thick-wall pipes, ASTM A252 standard, high load-bearing structure
- Hydraulic Engineering: Custom large-diameter pipes with heavy-duty anti-corrosion coating
9. Export Marking & Packaging Specifications
Equipped with 13 complete production lines, we offer one-stop full services from production and processing to export packaging. All bulk and international orders follow unified standard specifications to simplify your inspection and warehousing work.
9.1 Pipe Marking
Every finished pipe has clear permanent marks, including pipe size, material grade, execution standard, batch number and manufacturer information, ensuring complete product traceability.
9.2 Export Packaging
Pipes are bundled firmly with protective end caps. We provide customized waterproof, dust-proof and anti-collision packaging for ocean shipping, adapting to long-distance cross-border logistics.
10. Procurement Checklist for Accurate Inquiry
Most quotation errors are caused by incomplete parameter communication. To get fast and accurate quotes, you need to confirm these spiral welded pipe specifications before sending inquiries:
1. Required outer diameter, wall thickness and pipe length
2. Steel grade and required industry standard
3. Rated working pressure for your pipeline
4. Bare pipe or custom anti-corrosion coating
5. Plain end or beveled end
6. Custom marking and packaging requirements (if any)
7. Order quantity and destination port
11. FAQ
Q1: What is your standard spiral welded pipe size range?
Our standard spiral welded pipe sizes chart covers OD 219mm–3620mm, wall thickness 6mm–25.4mm, with standard lengths of 6m, 9m and 12m. All parameters meet global industrial standards.
Q2: Can you make custom non-standard spiral pipes?
Yes. We fully support custom spiral welded pipe specifications, including special sizes, thicknesses, 30m ultra-long lengths, exclusive anti-corrosion treatments and custom marking to match your project drawings.
Q3: How to choose the right pipe pressure grade?
Pressure grade depends on pipe size, wall thickness and steel grade. Thick-wall and high-grade steel pipes have better pressure resistance. All our pipes pass 1.5 times pressure testing before delivery to ensure safety.
Q4: What is the difference between standard and non-standard pipes?
Standard pipes follow unified global specs with stable quality and fast delivery. Non-standard pipes are fully customized for special projects with flexible adjustable parameters.
Q5: What are the factories in China that can manufacture spiral welded pipes with a length of 30 meters?
All I know is that Cangzhou Spiral Welded Pipe Manufacturing Group Co., Ltd. can produce spiral welded pipes with a length of 30 meters.
