Three layer polypropylene coating 3LPP

Anticorrosive coating consists of the following layers:

     •    Epoxy primer with minimal thickness of 80 μm
     •    Copolymeric adhesive layer with minimal thickness of 160 μm
     •    Polypropylene layer with thickness range between 1,3 mm and 3,8 mm with possibility to obtain even 10 mm

Izostal S.A. supplies coated steel pipes of diameter between 21,3 and 1220 mm and length between 8 and 18 linear metres; moreover we provide coating services with reference to pipes delivered by our customers.

Coating process is divided into the following stages:

     •    Abresive blast cleaningof the steel pipe surface to Sa 2 ½ according to PN-EN ISO 8501-1
     •    Induction heating of pipes
     •    electrostatic spraying of epoxy powder on preheated pipes wytłaczanie lub
     •    Extrusion or electrostatic spraying of copolymer adhesive on preheated pipes
     •    extrusion of polyethylene layer
     •    coating cooling with water
     •    mechanical machining of pipe ends
     •    application of anticorrosive varnish on pipe ends

Typical features of the three layer anticorrosive coatings applied on steel pipes include the following:

     •    high resistance to mechanical damage,
     •    resistance to chemical substances, moisture, breakdown, high temperature and UV radiation,
     •    good adhesion of the coating to steel pipe surface,
     •    anticorrosive protection of underground pipelines for approximately 50 years,
     •    complete protection of steel pipe welds,
     •    easy connection of coated pipes without damaging the coating,
     •    the coating is neutral to the natural environment.

Izostal S.A. supplies coated steel pipes of diameter between 21,3 and 1220 mm and length between 8 and 18 linear metres; moreover we provide coating services with reference to pipes delivered by our customers.