Tianjin Brisk Steel is one of the manufacturers of LSAW Steel Pipe For Engineering Projects in China. Our products are mainly exported to the Middle East, Southeast Asia, Europe, New Zealand, and other regions.If you would like to learn more about our products, feel free to contact us and send your purchase list.
Brief Introduction to JCOE Manufacturing Process
JCOE refers to J bending → C bending → O forming → E cold expanding
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Plate preparation: Steel plates are edge-milled to form welding grooves, with surface flaw detection carried out in advance.
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JCO Forming (the working station in the photo): The heavy hydraulic press manufactured by TZCO (Taiyuan Heavy Industry) bends flat steel plates into cylindrical tube blanks through segmented precise pressing. This method delivers better roundness and wall thickness uniformity than traditional rolled pipes.
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Tack welding & inner/outer submerged arc welding: Temporary tack welds fix the tube shape, then full penetration submerged arc welding is applied on both inner and outer seams for excellent tightness and mechanical strength.
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Cold Expanding (E): Full-length mechanical expanding calibrates dimensional tolerance and relieves welding residual stress.
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Strict inspection: 100% UT/RT weld inspection + hydrostatic pressure test + pipe end bevel processing before finished delivery.
LSAW JCOE Production Process
Advantage Of JCOE LSAW Pipe
- Suitable for large diameter & heavy wall thickness specifications; High circular precision, low residual stress, stable pressure resistance; Long single pipe length (8–12m), reduces field welding joints for projects; Weld performance complies with global mainstream industrial standards.
Pipe Type Comparison (for customer reference)
| Pipe Type | Craft | Application Positioning |
|---|---|---|
| JCOE LSAW (Our product) | Plate pressing + straight submerged arc welding | High-pressure oil & gas transmission, heavy-load foundation & structure |
| SSAW Spiral Pipe | Coil rolling + spiral welding | Low-pressure water supply, ordinary municipal pipelines |
| ERW Straight Pipe | High-frequency resistance welding | Small & medium diameter low-pressure fluid delivery |
Applicable Industries & Project Scenarios
Oil & Gas Energy (Largest demand market)
- Long-distance crude oil & natural gas trunk pipelines (API 5L PSL1 / PSL2 certified)
- Oilfield gathering pipelines, gas station process piping, CO₂ sequestration & hydrogen transportation high-pressure pipes
Marine & Coastal Infrastructure (Hot sales in Turkey, Bulgaria, India & Middle East)
- Steel casings & bearing piles for cross-sea bridges, ports & wharves
- Monopile foundations for offshore wind power, seawall & waterway engineering components
Municipal & Thermal Power Industry
- High-temperature & high-pressure municipal central heating main pipelines
- Large-scale water plant delivery pipes, power plant circulating water pipelines
Heavy Steel Structure Construction
- Round load-bearing columns for skyscrapers, airports & exhibition venues
- Frame components for bus stations, large-span workshop trusses
Pressure Vessel & Heavy Machinery Parts
- Cylinder base material for pressure tanks & heat exchangers, thick-wall hydraulic cylinder tubes
Pipe Applicable
Marine Coastal Infrastructure
Oil & Gas Energy
Selection Tips for Clients
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Ordinary low-pressure water drainage: SSAW spiral pipe is more cost-effective
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Working pressure over 4MPa, buried pipelines, marine corrosive environment, permanent load-bearing structures: JCOE LSAW pipe is the mandatory reliable choice
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Optional anti-corrosion treatment: 3PE coating, hot-dip galvanizing, coal tar epoxy coating for underground & subsea service conditions
FAQ
Q: What is the common size range of your JCOE straight welded pipes?
A: Outer diameter: 406mm ~ 1422mm; wall thickness: 6mm ~ 40mm; single fixed length: 8m / 12m, customized lengths are acceptable.
Q: What inspection tests will be carried out for finished pipes?
A: Full inspection procedure: plate raw material inspection → UT & RT weld detection → full-length hydrostatic pressure test → dimensional recheck → pipe end bevel machining, all test reports can be provided.
Q: What is the difference between LSAW pipe and SSAW spiral pipe? When should I choose your LSAW pipe?
A: SSAW is fit for low-pressure water supply & general municipal drainage with lower cost. Our LSAW has higher weld tightness and structural strength, suitable for high-pressure oil/gas transmission, offshore foundation piles, high-temperature heating pipelines and heavy load building columns.
Q: Is your LSAW pipe applicable for offshore wind monopile & bridge foundation projects?
A: Absolutely. Stable wall thickness tolerance and excellent overall structural rigidity meet the long-term load-bearing demand of marine foundation engineering, which is one of our mainstream export products to Turkey, Bulgaria and Middle East markets.
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