Most common materials to coat pipes

Three-layer Polyethylene (3LPE) and 3 layers Polypropylene (3LPP)

Low material and application cost

•  Application of flame in pipeline 

  environments has traditionally been the cause of workplace fires and explosions

• Requires application of flame to create adhesion

• Limited heat resistance.

• Maximum 225°F to 250°F.

• Limited dimensional stability

• Features just a borderline hardness

• Shows poor resistance to sulfur, amines, oxygen, and other oxidants.

Polypropylene (PUR)

Recommended for deep sea applications with relatively high temperature and pressures

for deep sea

Polypropylene is liable to chain degradation from exposure to heat and UV radiation such as that present in sunlight.

Fusion Bonded Epoxy (FBE)

Excellent chemical resistance and great dimensional stability with minimized hysteresis

• Rather expensive application cost per meter

• FBE materials are expensive

• The pipe and the coating materials must be heated to approx 250°F

• Long lead times

Asphalt enameled and polyurethane (PUR)

Cheap and superior to coal enamelReduces the hysteresis
Fast treatment

• Modest resistance to chemical aggression

• Strict temperature ranges

• Limited dimensional stability