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1.Main types of anti-corrosion spiral steel pipe:
Common forms of anti-corrosion spiral steel pipes are mainly 3PE anti-corrosion, epoxy resin anti-corrosion, cement mortar anti-corrosion and epoxy coal asphalt anti-corrosion.
2.Main features of anti-corrosion spiral steel pipe:
3PE anticorrosion is mainly for oil and natural gas pipelines, because oil and natural gas pipelines require high price comparison, 3PE anticorrosion can generally increase the life of the pipeline to about 30-50 years.
Epoxy resin anticorrosion is mainly for drinking water pipelines. Because epoxy resin is a non-toxic raw material, it is often referred to as non-toxic drinking water pipelines. There are many types of corrosion media in the IPN8710 anti-corrosion spiral steel pipe, including acids, alkalis, salts, oxidants, and water vapor. The coating must be chemically inert and resistant to acid and alkali corrosion. The coating film should be dense in structure, have good waterproof permeability, and strong adhesion. , Tough and plump.
The anti-corrosion of cement mortar is mainly for the anticorrosion of sewage pipelines. Since sewage has low requirements for anticorrosion, as long as the service life of the pipeline can be extended, the anticorrosive cost of cement mortar is the lowest.
Epoxy coal asphalt anticorrosion is mainly for large diameter spiral steel pipes. Because 3PE anticorrosion is generally difficult to construct when the diameter is greater than 1 meter, epoxy coal asphalt anticorrosion can only be used. Epoxy coal tar coatings are divided into epoxy coal tar primer and epoxy coal tar topcoat according to their functions. The epoxy coal tar pitch top coat is a series of products, which are divided into two types of solvent-free type (GH201) and thick paste type (GH202) according to the solid content. The heat-resistant temperature is divided into temperature-resistant type (used in 150 ℃, filled with W) and standard type (used in 100 ℃) for users to choose according to the actual requirements of anticorrosion engineering.
3. Precautions for anti-corrosion spiral steel pipe:
During construction, you should check whether the groundwater and rainwater have contacted the pipeline. If the water contacts the pipeline, the pipeline jacket should be dried. When installing the pipe, it should be installed lightly, and no impact or fall should be allowed. The insulation layer of the insulation pipe must not collide with the burning fire to prevent the insulation layer from being burned off. Pipes and fittings should be stored on a relatively flat ground, neatly stacked, and stacked height should not exceed 1.5 meters.
4.Main uses of anti-corrosion spiral steel pipe:
Mainly used for anticorrosion of buried or underwater steel oil transportation, gas transmission, water supply and heating spiral welded pipes. Waterproof and anti-leakage of concrete structures such as concrete pipes, sewage tanks, roof waterproofing floors, bathrooms, basements, etc.