X60 is a pipeline steel grade defined in the API 5L standard, with a minimum yield strength of 60,000 psi (approximately 414 MPa), suitable for medium- and high-pressure transmission environments. Compared to ordinary carbon steel, X60 offers higher tensile strength and low-temperature toughness while maintaining good weldability, making it particularly suitable for traversing complex terrains or areas with harsh climates.
API 5L X60 Spiral welded steel pipes are produced by rolling hot-rolled coils into pipes at a specific helical angle and using submerged arc welding to achieve double-sided welding on both the inner and outer sides, forming a continuous weld seam.
Large Diameter X60 SSAW Pipes (Up to 3000mm) – Custom Sizes & Wall Thickness：sales@gneetube.com
Technical Specifications of API 5L X60 large diameter sSAW pipe
| Item | Specification |
| Material Grade | API 5L X60 (L415) - PSL1 & PSL2 |
| Outer Diameter (OD) | 219mm – 3048mm (8" – 120") |
| Wall Thickness (WT) | 5.0mm – 30.0mm |
| Weld Type | SSAW / HSAW (Double-Sided Submerged Arc Welding) |
| Yield Strength | Min. 415 MPa (60,200 psi) |
| Tensile Strength | Min. 520 MPa (75,400 psi) |
| End Finish | Beveled (30°, 37.5°), Plain, or Flanged |
What is the yield strength of X60 pipe?
What is the difference between API 5L X60 and X65?
API 5L X60 SSAW Pipe Quality Assurance
Raw Material Inspection
- Material control assessment
- Visual and dimensional inspection
- Laboratory material testing supervision
- Raw Material Inspection
- Raw Material Acceptance
- Raw Material Certificates Audit
- Raw Material quantity,visual,tracebility check
- Raw Material Dimernsion check
- Raw Material laboratory test for chemical&mechanical property
Production Process Inspection
- Production specification docs check and audit
- Production process(each) check and approve
- NDT (UT/X-RAY/RT/PT/ET/MT) test
- HYDRO STATIC test
- Surface & dimension Check
- Laboratory test
- Chemical Test
- Mechanical Test
- Impace Test
- Bending Test
- Flaring Test
- Hardness test
Finished products Inspection
- Dimension Check (OD,W.T.,L,roundness,straightness)
- Surface Check
- Marking & tracebility check
- Quantity check
- End protection check
- Packing check
- Loading monitoring
Manufacturing Process of API 5L SSAW Pipe
Raw Material Preparation: Strict Quality Control at the Source
- Raw Material Selection: Primarily using Q235B, Q345B, and other carbon or low-alloy structural steel coils. Some high-pressure pipelines use X-series high-grade pipeline steel (such as X70 and X80).
- Physical and Chemical Testing: Each batch of steel undergoes chemical composition analysis and mechanical property testing (tensile and bending tests) to ensure compliance with national standards.
- Surface Treatment: Before use, the strip steel must be cleaned of oil, rust, scale, and other impurities. Common methods include shot blasting, pickling, or chemical cleaning to achieve Sa2.5 grade rust removal standard.
Strip Steel Pretreatment: Laying the Foundation for Forming
- Uncoiling and Leveling: The steel coil is uncoiled, and a leveling machine eliminates wavy edges and bending defects, ensuring the strip steel's flatness.
- Edge Trimming and Milling: The strip steel is precisely trimmed on both sides using an edge trimming or milling machine to ensure consistent width and to process a bevel shape that meets welding requirements (commonly X-shaped bevel). Pre-bending treatment: The edges of the strip are pre-bent to make them easier to roll and form, reducing welding stress concentration.
Spiral Forming and Welding: Core Processes
- Spiral Rolling: The strip is gradually rolled into a cylindrical shape in a forming machine at a set spiral angle (usually 30°~75°). The pipe diameter, misalignment, and weld gap are controlled by a roller system to ensure dimensional accuracy.
- Inner and Outer Welding: A double-sided submerged arc automatic welding process is used, with simultaneous welding on the inner and outer sides to improve weld strength and sealing.
- Welding equipment is mostly Lincoln welding machines, used with welding wire and flux (such as H08MnA+HJ431), to achieve high-quality fusion under the protection of the flux layer.
- High-end production lines use a "pre-precision welding" process (two-step method), forming first and then welding, significantly reducing welding defects and improving low-temperature toughness.
GNEE Pipe Packaging and shipping
Avoid construction delays with our ready-to-ship API 5L X60 stock. Manufactured from Tier-1 raw material billets with full traceability. Fast port loading and global shipping available. Check our current inventory and secure your shipment now：sales@gneetube.com