In order to slow down and prevent the corrosion and depreciation of steel pipes under the chemical and electrochemical action of internal and external media or due to the metabolism of microorganisms, it is necessary to do a good job of anti-corrosion of pipelines. In addition to the corrosion protection technology for the conveying medium, most steel pipes for conveying oil and natural gas are in a relatively complex soil environment, and the conveyed medium is also corrosive, so the inner and outer walls of the pipeline are likely to corrode. Once the steel pipe is corroded and perforated, it will cause oil and gas leakage, which will not only seriously pollute the environment, but also cause fire and endanger people. Therefore, it is necessary to do anti-corrosion work on the pipeline.
Insulation by smearing
Mainly use uncertain insulation materials (such as expanded perlite, expanded frog stone, asbestos powder, asbestos fiber and diatomite clinker, etc.), add a certain amount of binder (such as cement, water glass and refractory clay, etc.). Or add a coagulant to it, choose the ratio of ingredients, add water and mix evenly to form a shaped mud mass, and then spread it evenly with your hands directly.
Wrap insulation
The winding insulation method is mainly to make the insulation material into a rope or a strip, and then directly wrap it on the pipe that needs insulation.
Prefabricated components for thermal insulation
①Pipeline prefabricated insulation structure. When the pipe diameter is DN≤80mm, use a semicircular shell. If the pipe diameter is DN ≥ 100mm, fan-shaped or trapezoidal tiles are used.
②Materials used in prefabricated products are mainly foam concrete, asbestos, slag wool, glass wool, expanded perlite, calcium silicate, etc.
Filling method insulation
① During the construction process, fix the round steel support ring on the pipe wall. The thickness of the ring is the same as that of the insulation layer, and then the support ring is wrapped with iron sheet, aluminum sheet or wire mesh to fill the insulation material.
② This filling method can use prefabricated hard arc bricks with porous materials as the supporting structure, and the distance between them is about 900mm. According to the outer circumference of the insulating layer of the pipeline, the surrounding of the support is covered with round machined slag, and the filling and insulation structure should be made of metal protective shell as far as possible.
The above are a variety of insulation methods for anti-corrosion steel pipes, which can be selected according to needs.
Tips: Anti-corrosion steel pipe base materials include spiral pipe (SSAW pipe), straight seam pipe (LSAW pipe), seamless pipe, etc. Widely used in pipeline engineering fields such as long-distance water transmission, petroleum, chemical industry, natural gas, thermal power, sewage treatment, water source, bridge, steel structure, marine water transportation piling, etc.
Insulation by smearing
Mainly use uncertain insulation materials (such as expanded perlite, expanded frog stone, asbestos powder, asbestos fiber and diatomite clinker, etc.), add a certain amount of binder (such as cement, water glass and refractory clay, etc.). Or add a coagulant to it, choose the ratio of ingredients, add water and mix evenly to form a shaped mud mass, and then spread it evenly with your hands directly.
Wrap insulation
The winding insulation method is mainly to make the insulation material into a rope or a strip, and then directly wrap it on the pipe that needs insulation.
Prefabricated components for thermal insulation
①Pipeline prefabricated insulation structure. When the pipe diameter is DN≤80mm, use a semicircular shell. If the pipe diameter is DN ≥ 100mm, fan-shaped or trapezoidal tiles are used.
②Materials used in prefabricated products are mainly foam concrete, asbestos, slag wool, glass wool, expanded perlite, calcium silicate, etc.
Filling method insulation
① During the construction process, fix the round steel support ring on the pipe wall. The thickness of the ring is the same as that of the insulation layer, and then the support ring is wrapped with iron sheet, aluminum sheet or wire mesh to fill the insulation material.
② This filling method can use prefabricated hard arc bricks with porous materials as the supporting structure, and the distance between them is about 900mm. According to the outer circumference of the insulating layer of the pipeline, the surrounding of the support is covered with round machined slag, and the filling and insulation structure should be made of metal protective shell as far as possible.
The above are a variety of insulation methods for anti-corrosion steel pipes, which can be selected according to needs.
Tips: Anti-corrosion steel pipe base materials include spiral pipe (SSAW pipe), straight seam pipe (LSAW pipe), seamless pipe, etc. Widely used in pipeline engineering fields such as long-distance water transmission, petroleum, chemical industry, natural gas, thermal power, sewage treatment, water source, bridge, steel structure, marine water transportation piling, etc.
