Tianjin Brisk Metalwork Co., Ltd. is one of the leading manufacturers and suppliers of lsaw pipe for offshore engineering in China. We have world-leading production equipment and strong manufacturing capabilities. Please feel free to buy bulk durable lsaw pipe for offshore engineering from our factory.
PRODUCT
Tianjin Brisk Steel focus on produce and supply hollow section and steel pipe
Quick Reference: What We Supply
| Item | Our Supply Range |
|---|---|
| Outside diameter | 508 - 1,420 mm |
| Wall thickness | 8 - 50 mm |
| Single-piece length | 6 - 12 m |
| Plate options | Normalized, TMCP and quenched-and-tempered plate, selected to your offshore specification |
| Impact testing | Charpy V-notch at your design temperature, base metal and weld |
| Seam inspection | Full-length ultrasonic and radiographic inspection |
| Seam finish | As-welded, or ground flush for fatigue-sensitive details |
| Ends | Square cut, bevelled to your welding procedure |
| Documents | EN 10204 3.1 certificates per heat; 3.2 with third-party witness on request |
| Specification basis | Quoted to the specification in your tender (for example API 2B fabrication practice, EN 10225 or project-specific plate rules) |
Why Do Offshore Designers Specify LSAW Pipe?
- Wall and diameter that tubular joints need. Heavy walls up to 50 mm are rolled from plate, so thick chord and leg members do not depend on a seamless mill's size ceiling.
- Plate quality chosen for the job. Toughness, strength level and through-thickness behaviour come from the plate you specify, and we keep that plate traceable to each pipe.
- A single straight seam. One longitudinal weld, placed and inspected where you want it, instead of a helical weld running across the pipe.
- Large diameters in one piece. Fewer girth welds in the water and on the yard floor.
How Do We Select and Control the Plate?
Offshore performance starts with the steel plate, so we start there. Impact toughness is verified at the design temperature in your specification, on base metal and on the weld. Where the joint design loads the wall in the thickness direction, we can supply plate with through-thickness (Z-direction) quality on request. Every pipe carries a heat number that links back to the plate certificate, so your inspector can follow a stencil on the pipe to a test record.
Seams Built for Fatigue-Sensitive Details
Fatigue cracks start at weld toes and surface imperfections, so we pay attention to the seam:
- Seam position marked on each pipe, so cans can be assembled with seams staggered as your fabrication specification requires.
- Flush-ground seam finish at the pipe ends, or along the full length where the detail calls for it.
- Full-length seam inspection by ultrasonic and radiographic methods, with records filed against the pipe number.
Where Is LSAW Pipe Used Offshore?
- Jacket legs, braces and risers for fixed platforms
- Conductor pipes and caissons for wellhead structures
- Pile sleeves, guide tubes and skirt pile members
- Topside support columns and heavy module legs
- Jacket-type foundations for offshore wind
- Jetties, trestles and subsea structure frames
Project Example: 24 Can Joints, About 60 Fewer Fit-Up Hours
A fabrication yard was building a wellhead platform jacket from OD 1,219 mm x 38 mm leg cans, 12 m long, with 24 can-to-can girth joints. On a previous order, roundness variation forced the crew to pull each joint into line, costing about 3 hours per joint.
On this order we supplied cans with circumference-measured ODs, ovality held within 0.5 %, and sized ends. Fit-up dropped to about 0.5 hour per joint, which saved roughly 60 hours across the 24 joints, and the seam marks let the yard stagger seams without re-measuring.
FAQ
Q: What is the heaviest wall you can supply for offshore tubulars?
A: We roll plate up to 50 mm wall. For heavier members, send the member list and we will check what we can route for you.
Q: Can you supply pipe to API 2B or EN 10225 requirements?
A: Tell us the specification in your tender and the plate grades it calls for. We review it against our process and answer clause by clause.
Q: Can you supply Z-quality plate pipe?
A: Yes, on request. State the Z grade at enquiry so we can select and test the plate to it.
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