Ground steel pipe is under constant attack from soil corrosion, stray currents and backfill impact, proper selection of protective coating is imperative. 3LPE Coating (Three-layer Polyethylene) and FBE Coating (Fusion Bonded Epoxy) are the two most established systems now available, the selection needs to be closely followed by the working condition characteristics.
FBE Coating has excellent adhesion, chemical resistance and is appropriate for dry sandy soils and the interior of pipelines. Can be applied as a lining in FBE Coated Pipe to protect cleanliness of the transported medium; Single layer FBE is weak against impact, should be used with caution in rocky terrains. Fbe Epoxy is also the primer coating of the 3LPE Coating and provides chemically bound base for the three-layer system.
3LPE Pipe consists of the Primers, the Adhesive and the HDPE topcoat which combines the function of corrosion and mechanical protection. Its impact strength is at least 3 times higher than FBE, moisture proof to the extreme, and is especially adequate for high water table, saline soil and big size Oil And Gas Pipe project with design life of 30~50 years.
Selection criteria (Key Points):
- Risk of mechanical damage is high → choose 3LPE Coating from the beginning; low risk and cost spec → choose FBE.
- Working temperature up to 80ºC, switch to 3LPP (polypropylene).
- The ring weld patch is weak, need strict quality inspection.
- The surface processing should be up to grade Sa2.5, otherwise the coating will peel off.
In terms of base pipe matching, SSAW Pipe (Spiral Welded) and ASTM A252 Pipe are the regular option, the later is popular used in Steel Pipe Pile foundation engineering. High grade steel such as X65 is also applicable for the above coatings. Coating 3lpe has become the standard in our long distance pipeline.
Right selection combined with cathodic protection can secure pipe to serve for tens years.
The Advantages of Produce from our company
We have been specializing in spiral steel pipes since our founding in 1993. Occupying an area of 350,000 square meters, our total assets amount to 680 million yuan. Our production capability for SSAW Pipes is 4 million tons per year. The company produce line consists of 13 lines of spiral steel pipe and 4 lines of anti-corrosion coating. For a full range of SSAW pipe, sizes from Φ219 to Φ3500 with thicknesses from 6 to 25.4 mm. We also offer one-stop service for 3LPE and FBE anticorrosion coatings.
The product meets perfect with the international standard, such as API 5L, ASTM A252, EN 10219. It is also popular in the city water supply, oil and gas transporation, steel pipe pile construction project. The company has been awarded the certification for ISO 9001, ISO 14001 and OHSAS 18001.
Select us, you are Selecting quality base pipe and professional anti-corrosion coating services in one package. Every process from raw material purchasing to end product shipment is strictly supervised to make sure your 3LPE anti-corrosion steel pipe is long-lasting and dependable under the severe underground environment.
Post time: Aug-08-2026