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according to the current installation process of fire-fighting buried steel pipelines, it is generally required that the thickness of epoxy coal tar pitch is greater than 0.3mm for ordinary grades, the thickness of reinforced grades is greater than 0.6mm, and the thickness of specially reinforced grades is greater than 0.8mm. the specific methods of anti-corrosion of fire-fighting steel pipelines are as follows:
1. anti-corrosion method for ordinary fire-fighting steel pipes: first apply a layer of primer, and then apply three layers of topcoat.
2. the anti-corrosion method of reinforced fire-fighting steel pipelines: first apply a layer of primer, then topcoat, then glass cloth, then topcoat, wrap a layer of glass cloth, and finally apply two topcoats.
3. anti-corrosion method for special reinforced fire-fighting steel pipes: first apply a layer of primer, then coat the top coat, wrap a layer of glass cloth, then coat the top coat, wrap a layer of glass cloth, then coat the top coat, then wrap a layer of glass cloth, and then apply two coats of topcoat.
the buried construction of fire-fighting steel pipes refers to the "code for construction quality acceptance of building water supply, drainage and heating engineering" (gb 50242-----2002):
1. plastic pipes, composite pipes, galvanized steel pipes, or cast iron pipes for water supply should be used for water supply pipes.
2. overhead or ditch laying of outdoor water supply pipes. the installation requirements shall be by the installation requirements of indoor water supply pipes. exposed overhead laying plastic pipes must be exposed and overhead laying shall be kept warm and sunscreen.
4. the installation position of the fire pump adapter and outdoor fire hydrant must meet the design requirements.
5. the laying of water supply pipe management should be done with frozen lines. the laying of frozen lines should rely on thermal insulation and moisture-proof measures. the buried pipe top cover soil in the frozen area should be buried at a depth of more than 500mm and the crossing road should be buried at a depth of more than 700mm.
