AWWA C203-15 pdf download.Coal-Tar Protective Coatings and Linings for Steel Water Pipe
4.3.1 General. Tis section describes the composition and physical prop- erties of materials to be used for liquid adhesives, coal-tar enamel, innerwraps, outerwraps, and fnish coats intended for use in hot-applied coal-tar enamel linings and protective coating systems for steel water pipelines. Te liquid adhesive and coal tar shall be provided by the same manufacturer.
4.3.2 Liquid adhesive. Type A (coal-tar), Type B (fast-drying, synthetic), and Type C (two-component heat-curable liquid epoxy) liquid adhesives are cov- ered by this standard. Unless Type A liquid adhesive is specifed by the purchaser, Type B or Type C liquid adhesive, which may be employed under all conditions when coal-tar enamel is specifed, shall be used. At site locations where air emis- sion regulations may restrict the use of Type A and Type B liquid adhesive, other resin-base liquid adhesives may be used as equivalent to the Type A, B, and C liquid adhesives covered in this standard, provided that when topcoated with the appropriate coal-tar enamel, they meet the performance requirements of Table 1 and are approved by the purchaser. Consult the manufacturer for specifc alterna- tive surface preparation and application systems.
4.3.2.1 Type A liquid adhesive. Coal-tar liquid adhesive shall consist only of processed coal-tar pitch and refned coal-tar oils, suitably blended to produce a liquid that may be applied cold by brushing or spraying and that will produce an efective bond between the metal and a subsequent coating of coal-tar enamel.
4.3.2.2 Type B liquid adhesive. Fast-drying synthetic liquid adhesive shall consist of chlorinated rubber, synthetic plasticizer, and solvents. Tese con- stituents shall be suitably compounded to produce a liquid that can be readily applied cold by brushing or spraying and that will produce a suitable and efective bond between the metal and a subsequent coating of coal-tar enamel.AWWA C203-15 pdf download.