With the characteristics and characteristics of PE anticorrosive steel pipe, anticorrosive steel pipe has great advantages in construction and actual needs. Haorui Pipeline Co., Ltd. regards product quality as the life of the enterprise, and has established a perfect quality assurance system, and has passed the international quality system. It can control the whole process from raw materials, rust removal, coating to product delivery. Perfect quality management system and testing means provide users with high quality products and reliable guarantee. It is our consistent goal to provide high quality products and satisfactory service for customers at home and abroad.
(2) insulation layer: rigid polyurethane foam. (3) Protective shell: high density polyethylene or glass fiber reinforced plastic. (4) Leakage alarm line: when manufacturing high-temperature prefabricated directly buried insulation pipe, there is an alarm line embedded in the insulation layer close to the steel pipe. Once there is leakage in the pipeline, through the transmission of the line, the alarm can be given on the special detection instrument, and the accurate position and degree of leakage can be displayed, so as to inform the maintenance personnel to deal with the leaking pipe section quickly and ensure the safe operation of the heat supply network. Anticorrosion, good insulation and long service life. Except for the high-temperature prefabricated directly buried insulation pipes produced outside China, leakage alarm lines are set. Once there is leakage in the pipeline, through the conduction of the alarm line, the accurate position and degree of leakage of the insulation pipeline can be displayed on the special detection instrument, so as to inform the leakage inspection personnel to quickly deal with the leaking pipe section, ensure the safe operation of the heating pipe network, and give an alarm at home The line needs to be filled.
The national standard black jacket thermal insulation pipe is selected in size, and the precast polyurethane heat preservation steel pipe is composed of a working steel pipe, a rigid polyurethane foam foam insulation layer and a high-density external protective pipe. Polyurethane foam products are widely used in urban central heating and cooling engineering, with remarkable energy saving effect, convenient construction and installation, and good economic and social benefits. The structure of prefabricated polyurethane insulation steel pipe is mainly composed of three parts.
Layer: working steel pipe layer. According to the technical requirements of conveying medium, seamless steel pipe, seamless steel pipe and double-sided submerged arc spiral welded steel pipe are used respectively. The second layer: polyurethane insulation layer. The rigid polyurethane foam plastic is injected into the cavity formed between the steel pipe and the outer sheath by high-pressure foaming machine. The third layer is commonly called "tube in tube foaming": high density protective layer. As the internal coating is applied, the heating temperature of the steel pipe must be within the temperature range required by the fusion bonded epoxy powder coating used, but the high temperature shall not exceed 275 ℃. The design anticorrosion production specification of the operation line is When the medium frequency power is selected for the steel pipe with the diameter of 60mm ~ 426mm, the medium frequency power of 250KW is selected by calculation. In the trial operation, the temperature of the steel pipe is measured by the far-infrared thermometer. It is found that there are some shortcomings in using the multi circle single switch medium frequency induction coil. The local temperature of the steel pipe is too high or high, which makes the heating temperature of the steel pipe uneven Internal corrosion protection. In order to survive, develop and benefit, the manufacturer of epoxy white ceramic anti-corrosion spiral steel pipe has entered the market and invested 9338.7 billion yuan in real estate, which can be used for coating.
The construction technology of black jacket insulation pipe polyurethane foam is composed of two components. During the construction, the two components enter the spraying machinery and mix and spray out, which is in the form of fog. It is foamed and solidified in one minute. This kind of material was introduced in recent years and used for building thermal insulation and waterproof. After three years of use, it has more understanding, advantages and wide application range. -During construction, the immersion of underground water and rain water shall be avoided. If the end is accidentally immersed in water, drying treatment shall be carried out before connecting the jacket.
-The pipes should be stored in a flat site and stacked in order, and the stacking height should be less than -. - M. -Pipe hoisting should be carried out with care, collision and throwing are prohibited, and steel wire rope is not allowed to directly lift the pipe body. -Thermal insulation layer and anti-corrosion coating shall avoid direct contact with flame. Pipe trench excavation base treatment drainage, sand bedding - pipe laying - steel pipe welding - water pressure test - installation and pressure test - foaming - sealing of foam holes. Our company can send personnel to the project site to carry out the joint insulation work, including the installation of the joint outer sleeve, the connection and sealing of the joint sleeve and the main pipe, and the foaming work of the joint on site.
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