Slash your global freight on API 5L X42 large diameter pipes! Leverage our professional 'Nesting Solution' to save up to 30% on shipping costs for ODs up to 120 inches. Click for an all-in CIF quote and logistics optimization plan：sales@gneetube.com
API 5L X42 spiral pipe, also known as spiral steel pipe or spiral welded pipe, is made by rolling low-carbon structural steel or low-alloy structural steel strip into a pipe blank at a certain spiral angle (called the forming angle), and then welding the pipe seam together. It can produce large-diameter steel pipes from narrower steel strips.
Technical Specifications: API 5L X42 SSAW Pipe
| Feature | Specification Details |
| Material Grade | API 5L X42 (PSL1 & PSL2) |
| Outer Diameter (OD) | 219mm – 3048mm (8" – 120") |
| Wall Thickness (WT) | 5.0mm – 25.4mm |
| Standard Length | 6m, 12m, 18m, or Customized |
| Weld Type | SSAW / HSAW (DSAW Welding) |
| End Finish | Beveled (30°, 37.5°), Plain, or Flanged |
API 5L X42 Spiral Pipe Chemical Composition
| PSL | Steel grade |
API 5L X42 Seamless Pipe Chemical composition (%) | ||||
|---|---|---|---|---|---|---|
| C | Mn | P | S | Ti | ||
| Max | Max | Max | Max | Max | ||
| PSL1 | X42 | 0.28 | 1.30 | 0.030 | 0.030 | 0.04 |
| PSL2 | X42 | 0.24 | 1.30 | 0.025 | 0.015 | 0.04 |
API 5L X42 Welded Pipe Mechanical Properties
| PSL | Steel grade |
Mechanical properties | ||||
|---|---|---|---|---|---|---|
| Yield strength | Tensile strength | Elongation | ||||
| MPa | MPa | (%) | ||||
| Min | Max | Min | Max | |||
| PSL1 | X42 | 290 | 414 | See API SPEC 5L | ||
| PSL2 | X42 | 290 | 496 | 414 | 758 | See API SPEC 5L |
Read More
What is the difference between API 5L X42 and X52?
API 5L X42 Large Diameter Spiral Welded Pipe Production Process
- Rigorous testing of raw materials (steel strip, wire, flux) before use.
- Double-wire submerged arc welding for high-strength butt-welded seams.
- Precision leveling and edge planing to prepare the steel strip.
- Computer-controlled pressure to ensure stable strip conveying.
- Internal/External control forming for superior pipe roundness.
- Strict weld gap and misalignment control to meet high-pressure specs.
- Lincoln Electric (USA) welding machines used for maximum stability.
- 100% online ultrasonic flaw detection with automatic defect alarms.
- Precision air plasma cutting for individual pipe sections.
- Comprehensive first-pass inspection of chemical and mechanical properties.
- Manual X-ray & UT verification for all detected defect areas.
- Radiographic inspection on all T-joints and critical butt welds.
- Automated hydrostatic testing with computer-recorded parameters.
- Precision end machining for accurate bevel angles and perpendicularity.
API 5L SSAW Pipe Quality Assurance:
In large-diameter piping, the weld seam is the most critical area. To protect your project from catastrophic leaks or structural failure, our API 5L X42 pipes undergo a rigorous 4-step testing protocol:
100% Online Ultrasonic Testing (UT): Continuous scanning during production to detect any internal slag or porosity.
X-Ray Radiographic Inspection: Conducted on all pipe ends and suspect areas to ensure total metallurgical fusion.
Hydrostatic Pressure Testing: Every pipe is tested to at least 1.5x the working pressure to guarantee integrity.
Strict Dimensional Tolerances: We maintain tight control over Ovality, Wall Thickness, and Beveled Ends, ensuring perfect alignment for your on-site welders.
One-Stop Anti-Corrosion Solutions of API 5L SSAW Pipe
To ensure a service life of 50+ years, we provide professional coating options:
3LPE / 3LPP: For maximum corrosion protection in soil and water.
FBE (Fusion Bonded Epoxy): Superior adhesion for high-temperature pipelines.
Cement Lining & Bitumen: The industry standard for large-scale municipal water projects.
API 5L spiral pipe packaging and shipping
API 5L X42 Large Diameter Spiral Welded Pipe factory
Ensure leak-free infrastructure with API 5L X42 PSL1/PSL2 spiral welded pipes. 100% X-ray verified welds and Hydrostatic testing guaranteed for reliable water and gas transport. Request our latest MTC and technical test reports now: sales@gneetube.com
