StandardDetails

This International Standard specifies the bitumen and coal tar derived coatings suitable for protecting the external and internal surfaces of steel pipes and fittings, either individually or after assembly, and used in buried pipelines or conduits, or underground galleries, or submerged, and also the conditions for the application of such protective coatings. In the case of submerged pipes, special provisions shall be taken with regard to laying or immersion conditions (depth, fresh water, salt water). These specifications cover use for the transport of fluids the temperatures of which are within the following limits : a) - IO OC, + 80 OC 1) if only an external coating is applied; b) 0 OC, + 40 OC if an internal coating is applied (only or additionally). In a case where different temperatures are required, the bitumen or coal tar derived materials to be used shall present characteristics to be defined by agreement between the Parties concerned. l-he internal protective coatings of pipes intended for the transport sf potable water and food products shall satisfy the public hygiene criteria of the country of use.