STEEL PIPESOF A LARGE DIAMETER

This standard establishes general requirements to protection against corrosion of the outside surface of underground metal constructions (further - constructions): pipelines and reservoirs (including trench type) from carbonaceous and low-alloyed steels, power cables up to 10 kV inclusive; cables of communication and the alarm system in the metal cover, steel nonserviced repeater structures (NR… and regeneration (NRP) points of communication lines, and also the requirement to the objects which are sources of the wandering currents, including to the electrified rail transport, to lines of transfers of the direct current on wire-earth system, industrial enterprises., consuming the direct current in the technology purposes.

The standard does not extend on following constructions: cables of communication with the sheeting of hose type; steel concrete and pig-iron constructions: the communications laid in tunnels, buildings and collectors; piles, tongues, columns, and other similar metal constructions; main pipelines of the compressor, pumping-over and pumping stations, oil depots and head constructions of oil and gas fields; installations of complex preparation of gas and oil; pipelines – heat network with polyurethane foam thermal insulation and the pipe - the cover from tough polyethylene (the design "a pipe in a pipe"), having working system of operating remote control of the condition of insulation of pipelines; the metal constructions located in long-term frozen soil.