The thickness of the outer coating of the cable protection sleeve is determined by low and medium density polyethylene. The impact strength of the TPEP coating is greatly improved. The peel strength and impact resistance of the TPEP anti-corrosion layer are greatly improved, and the carbon black content of some special materials is clearly defined to ensure the mechanical strength and weather resistance of the TPEP anti-corrosion layer, and the joint peeling strength (ie, heat) is increased. The shrinkage strength of the shrink coat and the heat shrinkable tape to the primer steel is measured and frequency. The company has a professional anti-corrosion and anti-corrosion pipeline processing production line under the company, and hires senior engineers with high salaries to strictly control the quality. Specializing in the production of spiral steel pipe, anti-corrosion steel pipe, thermal insulation steel pipe, polyurethane foam insulation steel pipe, steel sleeve steel directly buried thermal insulation steel pipe, 3pe anti-corrosion steel pipe, epoxy coal asphalt anti-corrosion steel pipe, 8710 non-toxic water supply pipe, cement mortar anti-corrosion steel pipe, buried steel pipe Pipeline, oil and gas special anti-corrosion steel pipe, FBE epoxy powder anti-corrosion steel pipe, water supply and drainage anti-corrosion spiral steel pipe, heating and heating insulation steel pipe, anti-corrosion spiral steel pipe for sewage treatment, seamless steel pipe, straight seam welded steel pipe, etc. The company's existing four spiral submerged arc welded pipe production lines, all using today's advanced production equipment and the United States Lincoln automatic submerged arc welding machine, and equipped with online digital ultrasonic flaw detector, hydrostatic testing machine, X-ray real-time imaging, wan energy materials Experimental machine. TPEP anti-corrosion steel pipe diameter range Φ60 ~ Φ1420, wall thickness range between 2.5-18mm, this is a relatively good anti-corrosion method, generally can reach 50 years of service life, not only prolong the replacement cycle of underground pipeline equipment, but also greatly saves Cost has provided a powerful role for national construction! 3PE anti-corrosion is a commonly used anti-corrosion method, in addition to 2PE, 2PP, 3PP, their manufacturing process is similar, but the raw materials are not the same. The product produced by 3PE anti-corrosion equipment is characterized by simple production process, good anti-corrosion effect and low price. The anti-corrosion method generally recognized by the pipeline manufacturing industry. Tpep anti-corrosion steel pipe manufacturers: 9th domestic anti-corrosion steel pipe market mainstream price consolidation and wait-and-see, some areas have a phenomenon of compensatory growth, due to the higher cost of xian goods, merchants will not be willing to fall in price. First of all, because the price of anti-corrosion steel pipe is still strong, and the anti-corrosion steel pipe manufacturers are not loosened, even if the market trend of qi goods is weak, the goods will not follow the downward adjustment in the case of large cost support. On the other hand, the current price of xian goods and the cost of getting goods are relatively high, and the transaction is also not improved because of the continuous wait and see of downstream demand. Therefore, the replenishment progress of traders is slow, basically to digest the current inventory. . It is expected that the market price of short-term domestic anti-corrosion steel pipe market will be dominated by consolidation and wait-and-see. Even if the latter market is not good, its decline is relatively limited. Power line protection casing

Appearance inspection of cable protection sleeve: Visually inspect the appearance quality of the coated steel pipe, and the test results shall comply with the provisions of 5.1. Thickness measurement: Two cross sections of different lengths are taken from both ends of the coated steel pipe, and the thickness of the coating at any four points orthogonal to the circumference is measured by an electromagnetic thickness gauge in each cross section, and the test results are to comply with the provisions of 5.4. Pinhole test: the length of the pipe test piece is about 1000 mm. The steel pipe coating is inspected under the specified test voltage with a spark leak detector. The coating thickness is not more than 0.4 mm, the test voltage is 1500 V, and the coating thickness is greater than 0.4. Mm, test voltage is 2000 V. Check for the presence of sparks and the test results should be in accordance with 5.5. Adhesion test: The adhesion test shall be carried out according to 7.4.2 of CJ/T 120-2008, and the test results shall comply with the provisions of 5.6. Bending test: A coated steel pipe of DN ≤ 50 mm was subjected to a bending test. Among them, polyethylene (PE) and epoxy (EP) are preferred.
The construction requirements of the cable protection sleeve are high and as a good conveying medium, the plastic coated steel pipe can well meet the above requirements, which is also his advantage. The length of the test piece of the plastic coated cable protection pipe section is (1200±100) mm. In the environment with a temperature of (20 ± 5) °C, the radius of curvature is 8 times the nominal diameter of the steel pipe, and the bending angle is 30o, which is bent on the bender or the mold. In the bending test, there is no filler in the tube, and the weld is located on the side of the curved main surface. After the test, the test piece is cut from the middle of the curved arc, and the inner coating is inspected. The test results are to comply with the provisions of 5.7. Flattening test: The coated steel tube with DN > 50 mm was subjected to a flattening test. And the relationship between our use cost pipe section size is (50 ± 10) mm. At a temperature of (20 ± 5) °C, the test piece was placed between two plates, and gradually compressed on a pressure tester until the distance between the two plates was four-fifths of the outer diameter of the test piece. The steel pipe weld is perpendicular to the direction in which the load is applied. After the test, the inner coating is inspected and the test results are to comply with the requirements of 5.8. Flattening test Impact test: Cut a sample with a length of about 100 mm from any position of the coated steel pipe. Under the temperature of (20 ± 5) °C, as shown in Figure 2, perform the impact test according to Table 2. Observe the damage of the inner coating. During the test, the weld shall be in the opposite direction of the impact surface, and the test results shall comply with the provisions of 5.9. The inner and outer plastic coated composite steel pipe fully meets the current social needs and has become a material commonly used in steel pipes. The plastic coated steel pipe with different plastic coating layers can be divided into: inner plastic coated steel pipe, outer galvanized inner plastic coated steel pipe, and inner and outer plastic coated steel pipe. The inner and outer plastic coated steel pipes are also one of the plastic coated steel pipes. The advantages are smooth inner wall, low friction resistance and no scaling; light weight, good toughness, impact resistance and high compressive strength. The inner and outer coated plastic steel pipe inside and outside is a water supply composite pipe coated with epoxy resin powder coating on the inner and outer walls of the steel pipe. The inner wall has strong corrosion resistance and good chemical stability, and can transport fluid medium from -30 °C to 90 °C. After inspection, it meets the safety standards for drinking water and water distribution. Applying a layer of plastic on the wall of the steel pipe is called the coating of the inner wall of the plastic coated steel pipe, and it has excellent impact resistance and strong resistance to cathodic disbondment. Due to the smooth surface of the inner wall of the pipe, it can prevent the growth and scaling of microorganisms. At the same time, the conveying resistance is small, and the flow can be generally increased to save energy. The product has strong resistance to high and low temperature. Under normal circumstances, ordinary steel pipes can be deformed correspondingly at high or low temperatures, but it is difficult to occur. What is important is that the product has a high pressure resistance, and it is not easy to show any collapse under the pressure range it is subjected to. Second, the cable casing is resistant to interference. This property is determined by its own research and development production materials, because it is a cable casing with shielding interference. The product is high or low regardless of the humidity in the environment, so it is impossible to influence the signal in other places.

The power line protection sleeve integrates the excellent properties of plastic coated resin and coal tar pitch. The coating has high mechanical strength, high adhesion, low water absorption, chemical medium immersion, microbial resistance, resistance to plant root puncture, and is buried and water. * Anti-corrosion materials for the facility. The flaky mica powder in the coating increases the electrical insulation of the coating and is an insulating anticorrosive material that prevents electrochemical corrosion. The liquid plastic coating can be manually constructed on site, and can be processed by factory machinery. The construction method is simple and flexible, and it is a popular product. Some large-diameter plastic pipes are difficult to control due to consumables and the quality of the connection. It is neither applicable nor economical. The steel-plastic composite pipe was listed as a scientific and technological achievement promotion project in 2004 and has been widely used in construction. It inherits steel pipes and plastic pipes. Their respective advantages. At the same time, they have abandoned their respective shortcomings. The anti-corrosion measures are reasonable and scientific. The connection method is convenient and fast. It has outstanding advantages in the application of water supply. Plastic coated steel pipe is a new type of pipeline material newly developed in China, both inside and outside. There is a plastic coated protective layer, and the middle is a composite structure of reinforced welded steel pipe or seamless pressure-bearing steel pipe. It overcomes the defects of easy rust, corrosion, high pollution, low strength and easy deformation of the steel pipe itself, and integrates The common advantages of steel pipes and plastic products belong to the promotion of environmentally friendly products. Cable conduit cable laying has no interaction. After the construction of the cable casing civil construction is completed, the cable is simply applied. The disadvantage is that the construction cost of the pipeline is high, and it is not necessary to bend. The thermal expansion and contraction of the cable may cause fatigue of the metal sheath, and the heat dissipation condition of the cable is poor, and it is difficult to replace the cable. The hot dip steel cable protection tube has strong aging resistance and corrosion resistance, high mechanical strength, strong pressure bearing capacity, weather resistance, excellent insulation, smooth inner and outer surfaces, low friction coefficient and low water absorption rate. Up to 0.003%), adapt to a wide temperature range, (?40 °C? 80 °C) and other flash points. The highlight of the hot dip steel cable protection tube is the impact of external force damage. The small hot dip steel cable protection tube combines high-quality steel pipelines and nano-corrosion pipelines. It is mainly used in power and communication in various parts of the country. Construction of transportation, municipal, mining, petroleum, chemical and other pipeline systems.