Use 1, surface treatment. Steel surface to remove oil, sand-blasting to achieve GB / T Sa 2 8923, the best reach Sa2 1/2. When conditions are subject to restrictions, may also have tools rust to St3 level. After passing the steel surface treatment must be carried out as soon as possible before returning construction corrosion rust. Concrete should be dry, remove loose surface material, showing a flat solid surface. 2, with a primer. Part A Part B = 1: 1, fully mixed, stand ripening 5 ~ 10min after use. Use quick-drying primer curing agent, curing speed, with a good should be used within 2h, now with the current construction should avoid gel losses. You can not add with primer diluent, in order to avoid too thin, so that the coating thickness is insufficient. 3. Weld play putty. Above the surface of the steel pipe welds the two sides of 1mm and lap steel, putty should be playing a smooth transition surface of the concrete surface pits should also play putty smooth. Putty by with a good primer plus talc and mix thoroughly prepared, after a good tune should be used within 4h. 4, painted primer and wrapped baseband. Rubber coated steel or concrete before the end of the surface must be dry, smooth evenly primer should not leak Tu. Immediately after the end of plastic coated wrapping (or paste) baseband, lap 20 ~ 25mm, must be tightened or flatten the surface smooth, close contact with no bubbles. Side before the end of the winding baseband best immersion primer about 20mm, stained with primer and then wrapped or wrapped around the edge at the end of the ride brushing glue joints, which can effectively increase the rigor lap seam. Wrapped around both ends of a good coating of polyethylene tape wrapped plus fixed. 5, quality inspection. After coating wrapped standing from the dry, after hard work by the Ministry of Construction GB 50268-97 standard (or other industry standard) conditions and methods prescribed conduct appearance, thickness, adhesion test and inspect spark. 6, in case of urgent need trench backfill under special circumstances, in the finished rubber band wrapped around to protect their conduct transport case to avoid a collision, the lower trench and backfill construction, coating may eventually reach full cure in the ditch . Conclusion: PRC cold tapes is a new pipeline outer coating, which combines the advantages of a variety of anti-corrosion layers: (1) has a high mechanical strength of coal tar epoxy coating, adhesive force, water-resistant microorganisms resistant plant roots advantages. (2) the PRC cold tapes to synthetic rubber and synthetic plastic-based, it has extruded polyethylene coating toughness and anti-aging properties. (3) tapes construction process is simple, flexible, and has the advantage of polyethylene tape wrapped around the cold, both in the pre-processing coating, but also corrosion construction site, but it is better than polyethylene tapes, because the primer is no Solvent coal tar epoxy, high viscosity, large thickness, can weather construction in the sand, no effect on adhesion. In summary, RPC cold tapes construction method is simple, uniform thickness, quality, water resistance, microbial resistance, plant roots, erosion-resistant variety of chemical media, high mechanical strength, impact-resistant, easy to repair, is a low-cost, energy efficient new coating.