Coat Bitumen Enamel

Bitumen Enamels and Suited Primers to be used in combination therewith are described in “Specification for Bitumen-Based Hot-Applied Coating Materials for Protecting Iron and Steel. Including Suitable Primers Where Required”, BS 4147: 1980 by the British Standards Institution, said matter hereby been incorporated in the present specification. The same applies to examples of Tar Enamels and Suited Primers described in “Specification for Coal-Tar-Based Hot-applied Coating Materials for Protecting Iron and Steel, Including Suitable Primers Where Required”, BS 4164; 1980, also by the British Standards Institution.

Tar Enamels, such as for instance, coal tar enamel, are old and well-known pipe coating materials possessing several excellent properties, inter alia an outstanding protecting effect against corrosion. However, the material is gradually growing outdated, partly due to its environmental drawbacks and partly due to the difficulty of providing the raw materials of the correct quality. In addition, the use of tar enamel is encumbered with draw-backs relating to the production thereof because the properties of the tar enamel may change during the production which involves repeated return pumping’s, reheating and flood coatings, where it cannot be avoided that some of the ingredients of the enamel evaporate.