Cement Mortar Lining Anti-corrosion Coating Steel Pipe

The requirements of the cement mortar lining anti-corrosion coating steel pipe including: (1) has a good resistance to chemical corrosion performance; (2) good insulation performance and density to prevent stray current corrosion electrochemistry and; (3) corrosion resistant bacteria; (4) has certain mechanical strength, to prevent the mechanical damage of in the process of moving and buried; (5) the construction is simple, safe, and meet the site construction requirements, etc. In addition, in special region and some special requirements, such as cold resistance, etc.

Cement mortar lining anti-corrosion of steel pipe derusting method

1. Using hand tools and cleaning, the use of electric rotating wire brush to remove the metal on the surface of loose scale, rust and other impurities;

2. No visible on the surface of the steel after cleaning grease and dirt, and there is no attachment not firm scale, rust and other attachments, after cleaning the surface of the carbon steel pipe quality level for the St3;

3. The steel surface derusting should be timely inspection and confirmation, after qualified by inspection personnel inspection qualified rear can be carried out under the procedure.

4. The primer and glass cloth before the finish

5. Epoxy coal tar anti-corrosion paint brush the way based on conditions in the field of construction.

6. Steel rust removal of qualified through inspection besmear brushs primers and paint, paint as much as possible to set aside the steel assembly when the weld position, reserved length is about 150 mm, so difficult to clear the root welding, welding quality.

7. If the paint applied interval is too long, you need to use paint surface sand cloth or emery wheel after wool coat after besmear again.

The application of cement mortar lining anti-corrosion steel pipe

Cement mortar lining technology can be used not only in the new pipeline anticorrosion, can also be used in old pipeline reconstruction. Because the past rows of metal water supply mild steel pipe, the wall only to brush a layer of asphalt, water flow in the tube under long-term washout and anaerobic bacteria, the corrosion and scaling. By tinkering with the pipeline pigging, to cement mortar lining, water and then measure its friction coefficient has been reduced to 0.12, fully restored to the new pipe friction level. Pigging reformation with the cost of the cement mortar lining, is only 1/12 of the new DN600 pipe laying, has achieved considerable economic and social benefits, make old structural steel pipe to glow the youth.