LINE PIPE SELECTION GUIDE
Seamless, HFW or LSAW Line Pipe?
Seamless, HFW and LSAW are manufacturing routes, not simple quality rankings. A responsible decision considers the diameter–wall–grade combination, service, tests, project approvals, quantity and delivery economics.
Seamless line pipe
Seamless manufacture removes the longitudinal weld seam and is widely considered for demanding pressure, temperature and process-service combinations within the available dimensional range.
- Hot-finished seamless route
- Dimensional capability must be confirmed
- Heat treatment depends on grade and order
- Pipe-body NDT as specified
HFW / ERW line pipe
Continuously formed strip or coil is joined through a longitudinal high-frequency process. Modern supply relies on seam control, heat treatment and online inspection.
- Efficient continuous production
- Suitable gathering and transmission ranges
- Dedicated weld-seam process control
- Online and final seam NDT
LSAW line pipe
Plate is formed into large-diameter pipe and joined by longitudinal submerged-arc welding, making the route important for large diameters, heavier walls and project-controlled transmission.
- Plate-based manufacture
- Large-diameter and heavy-wall capability
- Inside and outside submerged-arc welding
- Project inspection and logistics planning
Evaluate the project, not the acronym
The governing specification, design conditions, approved manufacturing routes and qualification requirements remain authoritative.
- API 5L / ISO 3183 grade and PSL
- Diameter, wall, length and quantity
- Toughness and sour-service requirements
- Coating, end preparation and destination
ENQUIRY CHECKLIST
Information to prepare.
Use this list as an initial procurement guide. The governing design and purchase documents remain authoritative.
Send Your Requirement- 01Applicable standard, edition, grade and PSL
- 02Diameter, wall thickness, length and quantity
- 03Operating medium, pressure and temperature
- 04Sour or supplementary test requirements
- 05Approved manufacturing-route limitations
- 06Coating, inspection, documents and destination