The anticorrosion of the steel pipe is based on the drawing request, and the epoxy coal tar paint is used to wrap the glass wire cloth, and the topcoat is applied to the anticorrosion outer wall construction process: derusting of the pipeline → priming → first coat of topcoat → second coat of topcoat → glass fiber cloth → topcoat →topcoat; inner wall construction process flow: pipeline derusting→coating primer→one coat of topcoat→two coats of topcoat→three coats of topcoat and pipe before derusting and priming, the surface of the pipe should be cleaned of grease, ash, rust, oxidation Iron sheet. Using sandblasting to remove rust, its quality specification reaches Sa2.5 level.

Apply primer after removing the rust on the surface of the pipe, and the time between them should not exceed 8 hours. When applying the primer, the base surface should be dry. The primer is painted evenly and plumply, without clotting or blistering, and the two ends of the tube must not be painted within the range of 150~250mm. After the primer is dry, apply the top coat and bandage the glass cloth. The time between the primer and the top coat should not exceed 24 hours.

Epoxy coal asphalt coating adopts two-component, room temperature curing type coating; glass fiber cloth adopts dry, dewaxing, non-twisting, edge banding, medium alkali, warp and weft density of 10*12 roots/cm~12*12 roots/cm Glass cloth. After the topcoat is applied, the glass cloth is bandaged immediately. The width of the glass cloth is 30~40mm, the length of the joint overlap is not less than 100mm, and the overlap joints of each layer are staggered from each other. The glass fiber cloth oil penetration rate is over 95%, and no gap greater than 50mm*50mm should be present, leaving a 150-250mm stepped stubble at the end of the tube.