​Composite Coated Steel Pipe

Common anti-corrosion materials

Main Application

Three-Layer Polyethylene Coating (3PE)

High-pressure oil/gas transmission pipelines (e.g., natural gas, crude oil)，

Highly corrosive environments (coastal, saline-alkali soils, swamps)，

Urban gas distribution networks，

Buried/submerged pipelines requiring mechanical protection.

Polyethylene Coating (PE)

Low-pressure water pipelines (municipal supply, irrigation)，

 Short-term corrosion protection (temporary pipelines)，

Chemical pipelines (non-extreme acid/alkali service)，

Cost-sensitive projects.

Fusion-Bonded Epoxy Coating (FBE)

High-temperature oil/gas pipelines (≤120°C)，

Strong acid/alkali chemical pipelines，

Subsea pipelines (chloride resistance)，

Projects requiring cathodic protection (CP) compatibility.

Coal Tar Epoxy Coating (CTE)

Buried sewage/drainage pipelines，

Aging pipeline rehabilitation (low-cost application)，

Microbiologically influenced corrosion (MIC) environments，

Non-potable water pipelines.

​External 3PE + Internal FBE

Long-distance gas pipelines, subsea oil pipelines, sour gas gathering pipelines，

Strong acid/alkali pipelines (e.g., sulfuric acid, liquid ammonia)，

Seawater injection pipelines, risers for offshore platforms，High-pressure gas transmission networks (compatible with CP)，

Slurry pipelines (abrasion + corrosion resistance)

External FBE + Internal FBE

High-temperature heavy oil/bitumen pipelines (≤150°C)，

Flue gas desulfurization (FGD) pipelines (acid/alkali cycling)，Chlor-alkali industry pipelines (Cl₂/NaOH resistance)，

High-purity fluid pipelines (non-toxic, cleanable)，

Geothermal well casings (high-temperature steam)

External CTE + Internal FBE

Sewage treatment plant inlet/outlet pipes, stormwater drains，Irrigation pipelines (soil MIC resistance)，

Dock water supply pipelines (splash zone corrosion)，

Cast iron/steel pipe lining (manual application)，

Acid mine drainage pipelines (H₂SO₄ resistance)

External PE + Internal FBE

Potable water mains (FDA/NSF-compliant PE)，

Food/Beverage product pipelines (FBE prevents biofilm)，

Desalination RO system high-pressure pipes (UV-resistant PE, Cl⁻-resistant FBE)，

Pharmaceutical Purified water pipelines (non-leaching)，

Recirculation system pipes (chlorine-resistant PE, scale-resistant FBE)