Tianjin Brisk Metalwork Co., Ltd. is one of the leading manufacturers and suppliers of anti-corrosion coated lsaw steel pipe in China. We have world-leading production equipment and strong manufacturing capabilities. Please feel free to buy bulk durable anti-corrosion coated lsaw steel pipe from our factory.
Tianjin Brisk Steel is one of the manufacturers of Anti-Corrosion Coated LSAW Steel Pipe 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.
Coating Systems Available
The coating is selected according to the pipe's operating environment, not applied as a single default option. Common systems include:
- 3PE / 3LPE (Three-Layer Polyethylene) Coating – A fusion bonded epoxy primer, an adhesive layer, and an outer polyethylene layer. Widely used for buried oil and gas transmission pipelines due to strong mechanical protection and moisture resistance.
- FBE (Fusion Bonded Epoxy) Coating – A single-layer epoxy powder coating applied electrostatically and cured onto the pipe surface. Commonly used where chemical resistance and a thinner coating profile are required, and often used as the base layer under 3PE.
- Coal Tar Epoxy Coating – A traditional heavy-duty coating with strong resistance to moisture and aggressive soil conditions, still specified on some pipeline and piling projects.
- Hot-Dip Galvanizing / Electro-Galvanizing – Zinc-based coatings mainly used on smaller-diameter or structural pipe rather than large-diameter transmission LSAW pipe.
- Internal Coating (FBE or Liquid Epoxy) – Applied to the pipe interior to reduce friction loss and protect against internal corrosion from the transported medium.
The correct coating type, thickness, and number of layers should be selected based on the applicable standard (e.g., API 5L Annex, ISO 21809, AWWA C210/C213, or the project specification) rather than assumed.
Applicable Standards and Steel Grades
Anti-corrosion coated LSAW pipe is manufactured to internationally recognized line pipe and structural pipe standards, most commonly:
| Standard | Typical Grades | Typical Use |
|---|---|---|
| API 5L / ISO 3183 | Gr.B, X42, X46, X52, X56, X60, X65, X70 (PSL1/PSL2) | Oil and gas transmission pipelines |
| ASTM A252 | Gr.1, Gr.2, Gr.3 | Steel pipe piles for foundations, marine structures |
| EN 10219 | S275, S355 | Structural and construction applications |
Typical Specifications
- Outer Diameter: approx. 406 mm – 1,420 mm (16" – 56"), varies by project and manufacturer
- Wall Thickness: typically 6 mm – 40 mm, depending on grade and design pressure
- Length: single or double random length, or fixed length per customer requirement
- End Finish: beveled ends for welding, plain ends, or as specified
- Testing: 100% non-destructive testing (ultrasonic/radiographic) and hydrostatic testing per the applicable standard
Applications
- Long-distance oil, gas, and water transmission pipelines
- Offshore and subsea pipeline sections
- River and marine crossings where soil or water contact accelerates corrosion
- Steel pipe piles for bridge foundations, retaining walls, and waterfront structures
- Industrial pipelines in corrosive soil or high-humidity environments
FAQ
Q: What is the difference between LSAW pipe and coated LSAW pipe?
A: LSAW pipe refers to the base steel pipe manufactured by the longitudinal submerged arc welding process. Coated LSAW pipe is the same base pipe with an additional anti-corrosion coating (such as 3PE, FBE, or coal tar epoxy) applied to the outer surface, and sometimes the inner surface, to extend service life in corrosive environments.
Q: Which coating is best for buried pipelines?
A: 3PE (three-layer polyethylene) is one of the most widely used coatings for buried oil and gas pipelines because it combines the chemical resistance of an epoxy primer with the mechanical toughness of a polyethylene outer layer. The final choice should still follow the project's design specification and soil/environmental assessment.
Q: Can ASTM A252 pipe piles be anti-corrosion coated?
A: Yes. ASTM A252 steel pipe piles used in marine, waterfront, or aggressive soil conditions are commonly supplied with coatings such as coal tar epoxy or FBE to protect against long-term corrosion, in addition to the standard mechanical requirements of A252.
Q: Does coating affect the pipe's mechanical properties?
A: No. The anti-corrosion coating is applied to the exterior (and sometimes interior) surface after the pipe has been manufactured and tested; it does not change the base steel's tensile strength, yield strength, or wall thickness, which are governed by the applicable pipe standard (API 5L, ASTM A252, etc.).
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