Tentative Recommended Minimum Requirements For Hot Applied Wax-Type Protective Coatings And Wrappers for Underground Pipelines

This report lists tentative recommended minimum requirements for hot applied wax-type protective coatings and wrappers used on underground pipelines. Materials discussed include primers, microcrystalline-type wax coatings, shield coating, and outerwrap. Physical properties and test methods are reported for all of these materials with the exception of outerwrap. Physical properties and test methods also are given for the following specific types of component wrappers: plastic film, reinforced laminated plastic films, multilayer plastic asbestos wrappers, envelope type reinforced plastic film and wax saturated asbestos felt. Other matters discussed include application and maintenance of coatings, priming, electrical inspection, handling of materials, protection of joints and fittings, coating repairs and suggested material systems. 5.4.10, 8.9.3