1) Careful installation and inspection of carbon seamless pipes should be carried out to ensure the quality of pipes and pipes.


Check factory and spare parts factory certificate, quality certificate or test record, test record and other technical data, and conform to current national standards.
Check whether the quality marks of pipes, fittings and expansion joints conform to the technical documents and current national standards. If you have any questions, please replace or take measures.
Check the external surface quality of pipes and fittings. The wall thickness should conform to the national standard. The ellipticity shall not exceed the specified range. No cracks, no shrinkage, no slag, no folding, no thick skin, no blisters, no pinholes, no tolerances of local pit thickness, no protrusions and other quality problems, and no serious corrosion of pipeline and pipe surface and fittings qualified.

(2) When there is less rust on the surface of the pipe, the hand rust of the pipe should not be used. Usually, wipe the hand rust with wire brush, silk cloth, sand cloth, remove the rust on the surface of the tube, and then wipe or clean the cotton yarn. The surface of the pipe is metallic luster.

(3) When there are many rust marks on the surface of the pipeline, there are many pipelines. Mechanical rust removal or sandblasting or rust removal are usually used. Rust removal is usually done with sulfuric acid or hydrochloric acid.

(4) The rust-proof paint on the surface of brushing pipes should be selected according to the design requirements. Commonly used are red rust paint, epoxy resin paint and so on. Surface treatment is usually mixed paint.

Before spraying, clean the dust, dirt, burrs, oil and water on the pipe surface. Brush should be uniform, no leakage, paint qualified, adhere firmly, no peeling, no wrinkles, no bubbles, no leakage coating, no damage and other defects.