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Standard for Production Process of 3PE Coating Steel Pipe

in Here is your first Forum Tue May 23, 2017 10:30 am
by great123 • 6 Posts

Production process standards:
3PE coating steel pipe base material including seamless steel pipe, spiral steel pipe and straight seam steel pipe. Three-layer polyethylene (3PE) anti-corrosion coating with its good corrosion resistance, water vapor permeability and mechanical properties, in the oil pipeline industry has been widely used. 3PE coating steel pipe a coating for the life of the pipeline is essential, the same material pipe, and some buried in the ground for decades without corrosion, and some years of leakage. It is because they use a different outer coating.
3PE coating steel pipe:
Pipeline three layers of PE anti-corrosion structure: the first layer of epoxy powder (FBE> 100um), the second layer of adhesive (AD) 170 ~ 250um, the third layer of polyethylene (PE) 1.8 ~ 3.7mm. Three materials into one, and firmly combined with the formation of steel pipe to form an excellent coating. (Φ30mm-φ1020mm) three-tier polyethylene anti-corrosion is the domestic and foreign buried pipe outside the main technical system of anti-corrosion. Its anti-corrosion performance is good, low water absorption, high mechanical strength, in recent years in the domestic buried water, gas, oil pipeline on the access to a wider range of applications.
Product specifications: Ф89mm-Ф1820mm, wall thickness 6mm-20mm.
Material: Q235B, Q345B, 10 # steel, 20 # steel, X42-X80 level.
Implementation of the standard: GB / T23257-2009 "buried steel pipe polyethylene coating technical standards"
SY / T0413-2002 "buried steel pipe polyethylene coating technical standards"
DIN30670-91 Germany "steel pipe and pipe fittings of the polyethylene coating technical standards"
CAN / CSA-Z245.21-M92 Canada "Steel pipe outer wall polyethylene anti-corrosion coating technical standards"
Uses: Products are widely used in oil pipelines, natural gas pipelines, heating pipes, water supply pipes.

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