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how to use plastic-coated steel pipes correctly should be used correctly by the specifications. large-diameter plastic-coated steel pipe is a new type of pipe, which is used in many fields and has many excellent properties, especially its anti-corrosion performance is loved by people. plastic-coated steel pipes are used in many places, and there are certain advantages to their use methods must pay attention to.
when connecting plastic-coated steel pipes, some tools are needed, such as hacksaws, twisters, etc. these tools are often used in pipeline construction, and the connection of plastic-coated steel pipes is also inseparable from these tools. the method is the same as the traditional connection method and can refer to the connection method of galvanized pipes.
the connection method of plastic-coated steel pipes needs to pay attention to the fact that the connection between the pipe and the pipe fittings needs to use a raw material belt. the main purpose of this is to protect the pipe of the plastic-coated steel pipe and prevent the joint from corrosion; when cutting plastic-coated steel pipes, do not use high-temperature cutting methods to cut them. such methods as gas cutting must never be used. only wire-set cutting methods can be used. cutting cannot be completely cut. after cutting half, the fish and shrimp should be cut off with a hand saw, and then use the established tools to remove the burr of the pipe after the cutting is completed. when bending the pipe, it is not possible to use heating to bend it, the method used should be cooling, and the bending range should not be too large; before the interface of the wire mouth, the surface should be cleaned, and the pipe fittings used must meet the relevant standards; they cannot be exposed to the sun during transportation, otherwise it will cause damage to the plastic-coated steel pipe, and the storage temperature should not be too high. keep away from heat sources.
the inner and outer plastic-coated steel-plastic pipes and the inner and outer anti-corrosion layers are made of heavy-duty anti-corrosion-modified epoxy resin powder. after high-temperature preheating, the plastic layer is fused with the inner and outer walls of the steel pipe at high temperatures and has a strong bonding force with steel. the coating surface is smooth and beautiful. , due to the small fluid resistance, it can increase the flow rate, save energy, and has excellent anti-corrosion performance and good hygienic performance. modified epoxy powder anticorrosion has been widely used in the oil and gas industry.
performance characteristics: both inside and outside are coated, and the middle is a composite structure of reinforced welded steel pipes, which overcomes the defects of easy corrosion, pollution, short service life of steel pipes and low strength, large expansion, and easy deformation of plastic pipes. it has the common advantages of steel pipes and plastic pipes, such as good oxygen barrier, high rigidity and high strength, and easy detection of buried pipes. compared with other types of steel pipes, the main pressure-bearing layer of internal and external sprayed steel pipes is completely borne by the welded steel pipe in the composite pipe, and its plastic layer only plays a role of anti-corrosion protection, so the pressure-bearing capacity of the pipe is not affected by temperature changes and aging of the plastic layer impact. the inner and outer sprayed steel pipe not only inherits the advantages of metal pipe and plastic pipe but also overcomes their respective shortcomings. it is a new type of pipe that integrates the advantages of metal pipe and plastic pipe. this product has the following performance characteristics: excellent mechanical strength, higher strength, rigidity, and impact resistance than plastic composite pipes, low expansion coefficient, and creep resistance similar to steel pipes. buried pipes can withstand external pressure much greater than all-plastic pipes.