Cement mortar anti-corrosion steel pipe manufacturer market price

At present, it is mainly used for water supply pipes of municipal water companies. The external anti-corrosion is generally made of glass cloth wrapped with two cloths and three oils, epoxy coal pitch anti-corrosion steel pipe products. It consists of two parts: base tape and styling glue. The base tape is made of reinforced synthetic fiber polypropylene non-woven fabric, and the base material glue is impregnated with epoxy coal pitch and deoiled to make the setting glue. The setting glue is made of solvent-free epoxy coal pitch, which is mixed with A and B. According to the seasonal temperature, it is divided into two types: normal temperature and low temperature. . When leaving the factory, the base tape square meters are supplied with setting glue. In addition, anti-corrosion pipeline products are also widely used in the surface anti-corrosion and repair of steel pipelines and steel pipe storage tanks in industries such as petroleum, chemical industry, electric power, and urban utilities, including oil, gas, tap water, gas, heating, etc. The base tape, anti-corrosion layer and shaping glue have been tested by the PetroChina Pipeline Research Center and the National Building Materials Testing Center. All indicators fully meet the standards and requirements. There are many types of corrosion media in epoxy coal pitch anti-corrosion steel pipes, including acid, alkali, salt, Oxidants and water vapor, etc., the coating must be chemically inert and resistant to acid, alkali and salt corrosion. The coating film should have a dense structure, good waterproof permeability, strong adhesion, toughness and plumpness. Cement mortar anti-corrosion steel pipe factory Because the steel pipe is filled with concrete, it can absorb a large amount of heat energy. Therefore, the distribution of the temperature field of the pipe column section is very uneven when exposed to fire, which increases the fire resistance time of the column, slows down the heating rate of the steel column, and once The steel columns yield and the concrete can bear most of the axial load, preventing the structure from collapsing. The fire resistance of composite beams also increases because the temperature of the steel beam is reduced by transferring heat from the top flange to the concrete. Experimental statistics show that reaching the first-class fire resistance hour requirements can save one or more fire-retardant coatings compared with steel columns. As the diameter of the steel pipe increases, more coatings can be saved. High bearing capacity, good ductility, and superior seismic performance. Cement mortar-lined anti-corrosion steel pipes. Anti-corrosion steel pipes are used in: Municipal projects: Suitable for high-rise building water supply, heating network heating, tap water projects, gas transmission, underground water transmission and other pipelines. Petroleum: process pipelines for transporting corrosive media in petroleum transportation pipelines, chemical pharmaceuticals, printing and dyeing and other industries. Sewage treatment: sewage treatment discharge pipes, sewage pipes and biological pool anti-corrosion projects Agriculture: agricultural irrigation pipes, deep well pipes, drainage pipes and other networks, the corrosion resistance is better than that of steel structures, which is beneficial to the fire resistance and fire prevention of steel pipes. Cement mortar anti-corrosion steel pipes are made of ordinary cement, yellow sand of a certain thickness, and additives according to the designed mix ratio. The mortar is then applied to the inner wall of the pipe through special construction machinery and equipment to form a mortar coating of a certain thickness. After setting it becomes the lining. The cement mortar lining relies on its own binding force and the support of the pipe wall. Its structure is uniform, dense, hard and firm. If epoxy resin is painted on the mortar surface, its roughness coefficient after water is passed through can be further reduced. Cement mortar lining is not only a simple barrier in terms of physical properties, but also protects pipelines through the chemical properties of cement mortar lining. The mortar layer is combined with the pipe to form a passivation area with a high value on the pipe wall. After water is passed through, the water penetrates into the cement mortar and is rich in alkaline components, so that the water is no longer corrosive when it reaches the pipe wall.
Cement mortar anti-corrosion steel pipe has the following obvious advantages:. Avoid corrosion and scale on the inner wall of the pipeline, so that the pipeline can maintain good water delivery status for a long time and have a small friction coefficient. . Due to the isolation of the lining coating, the water body does not come into contact with the metal pipes, ensuring water quality. . The inner wall of the pipeline is anti-corrosion with cement mortar, which prevents corrosion and perforation and extends the service life of the pipeline. The materials of cement mortar coating are easy to obtain, the construction period is short, the anti-corrosion effect is good, and the cost of pipeline projects is reduced. In view of the above-mentioned advantages of cement mortar, its anti-corrosion function and economy are recognized by more and more engineering and technical departments at home and abroad. Domestic large and medium-sized cities use cement mortar as the main anti-corrosion point in water supply metal pipes. The country has also formulated specifications and quality standards for cement mortar linings. Right now:.
There are two methods for constructing cement mortar anti-corrosion steel pipes. One is the ground centrifugal method. Mainly suitable for pipeline lining construction below diameter. It is the underground spraying method, which is mainly suitable for underground anti-corrosion construction of pipes with diameters above that.
Cement mortar lining and metal pipes are made of two materials respectively. How is the bonding force of mortar to pipes? In particular, will the anti-corrosion layer inside the steel pipe fall off due to external forces such as transportation and installation? That is, what is its mechanical strength?
Its mechanical strength can be proven based on foreign experimental data.
When the steel pipe is deformed and flattened by external pressure, the mortar will produce hairy cracks, but it is very difficult to peel the mortar from the pipe wall. On a steel pipe with a diameter of 1.0 mm and a wall thickness of . Long pipe sections are lined with millimeter-thick mortar coatings. When flattened to millimeters, hair-like cracks can be seen. When the flattening amount increases to millimeters, the cracks gradually increase to the entire pipe section at the edge. Experimental results show that hairy cracks will occur when the flattening amount reaches % of the pipe diameter. When the flattening amount reaches % of the pipe diameter, the mortar coating begins to crack. When the flattening amount reaches % of the pipe diameter, Peeling. This is never allowed to happen during construction. It is measured that the minimum flattening amount is millimeters on the tube and millimeters on the tube. It can be seen that as the pipe diameter increases, the flattening amount of cracks also increases.
The structural characteristics of cement mortar anti-corrosion steel pipes are well known. Concrete has high compressive strength, but its bending resistance is very weak. Steel, especially section steel, has strong bending resistance and good elastic-plasticity, but it is easy to bend when under pressure. It loses its axial compressive resistance due to instability. The steel tube concrete can combine the advantages of the two in structure, which can put the concrete in a lateral compression state, and its compressive strength can be doubled. At the same time, due to the existence of concrete , improves the stiffness of the steel pipe, and the two work together to greatly improve the load-bearing capacity. As an emerging composite structure, concrete-filled steel tubes are mainly composed of compression members with small axial pressure and small eccentric force, and are widely used in frame structures. Scope of application of cement brushed anti-corrosion steel pipes: Mainly used for outer wall anti-corrosion of buried or underwater steel oil, gas, water and heating pipelines. It is also suitable for various steel structures, docks, ships, sluices, and gas storage tanks. , Refinery and chemical plant equipment anti-corrosion and waterproofing and anti-leakage of concrete structures such as concrete pipes, sewage pools, roof waterproofing layers, toilets, basements, etc. Features of cement brushed anti-corrosion steel pipe products: The cement mortar-lined anti-corrosion steel pipe product is a high-performance anti-corrosion coating. The coating is smooth, dense, hard, has strong adhesion, is resistant to salt and alkali, sea water, soil microbial corrosion, and plant rhizome penetration. The permeability is excellent. The composite use of coating and glass fiber cloth can enhance the mechanical properties of the anti-corrosion layer. The cement mortar-lined anti-corrosion steel pipe is coated at room temperature and solidifies naturally. The construction is simple and can be constructed by hand or machine. It is especially suitable for on-site use.