Bitumen or coal-tar coating is mainly used as anti-corrosion material for protection of steel pipes for industrial and drinking water. 

It is excellent and permanent adhesion to pipe surface and low water absorption.  However is flexibility and high electrical resistance.

COATING METHOD  

Hot applied spiral wrapping of bitumen or coal tar bonded fiberglass tape

Painting with lime wash containing additives for protection against sunlight

Pipe end cleaning (cutback)

Bitumen or Coal-Tar Coating Test  :

Surface Cleanliness Comparison

Surface Profile (Roughness)

Sand-Sieve Analysis

Coating Thickness Measurement

Holiday

Adhesion