Plastic sleeve steel buried steam pipe insulation Technical Articles

2, optimal performance waterproof seal (new technologies, new structures; 1, the largest long-term safe operation reliability (with good strength, stiffness, heat resistance, technologically advanced): plastic sleeve steel buried steam pipe insulation Technical Articles Product Description designed for easy implementation); 3, pipeline corrosion to ensure long life (FRP corrosion or coal tar epoxy anti-corrosion paint); 4, the potential risk is small (coat steel fatigue strength, thermal expansion and contraction of the environment in the long run, the interface does not Like fiberglass outer jacket pipe easy disengagement); 5, significant energy saving (sealing performance, no leakage, heat better); 6, easy construction, node seal; 7, construction steel welding process is more mature, leak detection means advanced. Prefabricated plastic sleeve steel steam pipe insulation polyurethane insulation pipe Origin Material Properties: Working pipe (core tube): For steam pipeline. Material properties, diameter size, dimensional tolerances, minimum wall thickness in line with the relevant national or industry standards. When working tube DN≤150mm, seamless steel pipe is generally used when DN is greater than 150mm, spiral weld pipe is generally used. Protection cushion: sandwich for work to prevent pipe damage inorganic insulation displacement between the pipe and insulation work. Work spiral welded seam steel pipe, the inorganic insulating layer of hard material, a protective cushion. Carpet cushion is generally used to protect aluminum, density ≤192kg / m3, thermal conductivity at room temperature ≤0.056w (mk); plus hotline shrinkage ≤4%. Inorganic Insulation: high temperature insulation material made of inorganic insulation. Generally used in porous calcium silicate, normal thermal conductivity ≤0.055w (mk), (density ≤220 kg / m3), while the moisture content of this material, temperature resistance, strength and other indicators can meet the requirements. Organic Insulation: insulation with an organic insulating material. Generally use rigid polyurethane foam, density 60-80kg / m3, compressive strength ≥0.2Mpa, room temperature thermal conductivity ≤0.027w / (mk) v, water absorption = ≤3%, Temperature ≤140 ℃. Outer protective tube: groundwater protection insulation from erosion, supporting the core tube and can withstand the pressure of the outer protective layer. According to different materials, generally fall into steel outer protection tube, high-density polyethylene plastic outer sheath tube, glass fiber reinforced plastic outer jacket pipe, composite outer jacket pipe. This product is generally used as the outer casing steel pipe, especially in the high-water or surface water rich regions, it must be made of steel outer jacket pipe. Steel outer jacket pipe material properties and tolerances, in line with the relevant national or industry standards. The outer surface of the pipe required shot blasting process. Coating: a protective layer of soil to prevent corrosion. This product is commonly used wound epoxy glass Special strengthen the level or coal tar epoxy structure (3 fabric four oil) as an outer steel pipe coating. Under special circumstances, it may be two-layered structure or three-layer structure of polyethylene coating. If necessary, supplemented by "cathodic protection" measures. Polyurethane insulation Usage: for heating pipe insulation, thermal insulation pipes, heating pipe insulation, heating pipe insulation, air-conditioning pipe insulation, steam pipe insulation, hot and cold pipe insulation, wall insulation and so on. Polyurethane insulation with high efficiency insulation, waterproof, corrosion, insulation, noise, fire, cold, corrosion, capacity light weight, high strength, simple and convenient construction, not afraid plant thorn and other outstanding features, has become the construction, transport, petroleum, chemical, electricity, refrigeration and other industrial sectors insulation, waterproof plugging and sealing not lack of information. Polyurethane insulation for room table all kinds of pipes, central heating pipes insulation, central air conditioning ducts, chemical, pharmaceutical and other industrial pipes, cold engineering, pipeline engineering, transport gas and other pipeline projects. Rigid polyurethane insulation polyurethane composition data from the thirties since the birth, has been used as an excellent insulation materials and rapid to carry out, its use has become increasingly widespread scale, but also because of its simple construction, energy-saving effect is obvious preservative is large numbers for a variety of heating, cooling, oil, gasoline and other transport pipeline. Large numbers for a variety of heating, cooling, oil, gasoline and other transport pipeline. Buried pipe insulation Overview: buried insulating pipe can in the 0.6-1.2 m permafrost burial (so people used to call Buried pipe insulation or prefabricated pipe insulation), heat loss than ordinary pipe can be reduced by 40 % or more, working life than other insulation corrosion materials increased by 3-5 times, life can reach 30 - 50 years; quality are in line with or higher than the Chinese industry standards. Its sound insulation system, with the overall project cost is low, time is short, long life, energy conservation, environmental protection and other features, continuous operating temperature of 130oC, the peak height of up to 150oC. ● buried insulating pipe size DN15 ~ DN1200 ● applies to the following 130 ℃ fluid conduit Buried (such as hot springs, hot water, air conditioning, water, oil, etc.) ● meet the CJ / T114-2000, CJJ / T81-98 standard ● professional equipment advanced technology to ensure superior quality ● professional equipment, advanced technology to ensure superior quality ● Buried, quick and easy installation a high temperature prefabricated buried pipe insulation, design and construction, we must truly understand the heating pipes Buried way into Buried there are compensation and without compensation Buried in two ways, really two ways to master their works, characteristics and applications to a reasonable choice in the design, the construction of safe, reliable and economical. 1 first to grasp the concept: there is compensation Buried way is by pipeline natural compensation and compensation (such as squares and bellows compensator) to solve the pipe heat elongation, so that the thermal stress to a minimum; no compensation Buried laying, simply put, it is the pipeline without any compensation measures when heated, but by the strength of the pipe itself to absorb thermal stress. 2 The basic principle of uncompensated laying: When installing piping, the piping first heated to a certain temperature, then the pipe is welded and fixed, when the pipeline revert to an installation temperature (temperature decreases), the pipeline previously suffered a certain tensile stress. When the pipe through the hot work, as the temperature rises, piping stress is zero, when the continue to heat up, the pressure is increased stress pipeline, when the temperature is raised to the operating temperature, pressure piping stress (thermal stress) is still less than the allowable stress. Thus, the pipeline can not compensate for the normal working of the device. This way no Compensation fourth strength theory, the need for pre-heating pipeline construction, construction is too much trouble, but there are a large number of domestic and international engineering practice, the reliability of calculation, to ensure safety. Another no compensation is calculated in recent years by the China Beijing Gas Heat Institute classification is made and stress stability analysis, using third strength theory. In this way full potential plasticity steel, construction convenient, without preheating.