Manufacturer of overhead polyurethane insulated steel pipe, polyurethane foam spiral pipe

Description :

　　The manufacturer of polyurethane insulated spiral steel pipe for directly buried polyurethane insulated pipe steam pipeline, the full name of large diameter insulated steel pipe agent is one component polyurethane foam sealant, commonly known as foaming agent, foam adhesive, PU sealant. In English, PU FOAM is the cross combination of aerosol technology and polyurethane foam technology. It is a special polyurethane product that packs polyurethane prepolymers, foaming agents, catalysts, and other components into pressure resistant aerosol cans. When the material is ejected from the aerosol tank, the foamed polyurethane material will rapidly expand and solidify with air or the moisture in the contacted matrix to form foam. Widely applicable. With the advantages of pre foaming, high expansion, small shrinkage, etc., and good strength of foam, high adhesive force, the cured foam has a variety of effects such as caulking, bonding, sealing, heat insulation, sound absorption, etc. It is an environmentally friendly and energy-saving building material that is easy to use. It can be used for sealing and plugging, filling and caulking, fixed bonding, heat insulation and sound insulation, especially for sealing, plugging and waterproofing between plastic steel or aluminum alloy doors and windows and walls. Polyurethane insulation pipes have excellent characteristics such as light bulk density, high strength, thermal insulation, sound insulation, flame retardancy, cold resistance, corrosion resistance, non water absorption, and simple and convenient construction. They have become essential materials for insulation, waterproofing, sealing, etc. in industrial sectors such as construction, transportation, petroleum, chemical, power, refrigeration, etc. Polyurethane welded pipe insulation pipe with a price of 10 inches is usually used in the centralized heating system of residential areas in cities. The water temperature generally does not exceed 120 degrees Celsius, so the methods used are one-time compensation direct burial method and uncompensated direct burial method. Let's first take a look at * one-time compensation direct burial method. During construction, a compensator is needed to compensate for a part of the total deformation of the pipeline section. It is generally suitable for working environments below 120 degrees Celsius and pipelines with a working pressure of less than 1.6 MPa; The second type of uncompensated direct burial laying utilizes the resistance between soil and the outer pipe to fix the pipeline, without the need for additional compensators or fixed brackets, making construction very convenient.

　　Prefabricated polyurethane foam plastic directly buried insulation pipe, referred to as "pipe in pipe" or "jacket pipe", is a composite pipe that uses the excellent adhesion of polyurethane foam to skillfully combine the polymer shell or glass fiber reinforced plastic shell, rigid polyurethane foam plastic and steel pipe into an integral structure when foaming. Directly buried insulation pipe fittings, such as elbows, tees, fixed joints, variable diameter pipes, water transmission joints, etc., are all prefabricated in the factory. Not only can it reduce on-site construction time and achieve convenient and fast construction, but it can also ensure the quality of anti-corrosion, waterproofing, insulation, and mechanical strength of all pipe fittings. All the outer protective pipes of the pipe fittings adopt the same anti-corrosion and insulation methods as the straight pipe sections, and the manufacturing process of the pipe fittings strictly follows the relevant enterprise standards. The elbow is prefabricated in the factory and treated with anti-corrosion measures. During on-site construction, it is necessary to fill a certain thickness of soft material around the outer protective pipe, and then fill it with sand and compact it to eliminate stress concentration at the bend. For right angle elbows, in order to compensate for the axial and lateral displacement at the elbow and the expansion and contraction of the working steel pipe in the limited space of the outer protective pipe during operation, the pipe diameter of the outer protective pipe is increased locally according to the calculated thermal displacement. For elbows less than 90, the outer protective pipe does not need to be thickened. The outer protective pipe, also known as the "pipe in pipe", is composed of a high-density outer protective layer, polyurethane rigid foam plastic pipe and steel pipe. The insulation layer is made of rigid polyurethane foam with a density of 60kg/m3 to 80kg/m3, which can fully fill the gap between the steel pipe and the casing, and has a certain bonding strength, so that the steel pipe, the casing and the insulation layer form a solid whole. The polyurethane directly buried insulation pipe foam has good mechanical properties and thermal insulation properties. Generally, it can withstand the temperature of 120 and can withstand the temperature of 180 through modification or combination with other insulation materials. According to the design and customer requirements, the standard polyurethane insulation pipe can generally be: seamless pipe (GB8163-87) is selected for pipes below DN200, spiral welded pipe (GB9711-88; SY/T5038-92) and straight seam welded pipe (GB3092-93) are selected for pipes above DN200. After advanced shot blasting and rust removal process, the rust removal grade of the steel pipe can reach Sa2 level in GB8923-1988 standard, and the surface roughness can reach R=12.5 microns in GB6060.5-88 standard. Due to strict production requirements for standard polyurethane insulation pipes, there is no need for customized production. The factory will have inventory of various models. The steel pipe selection type, thickness requirements, polyurethane insulation layer density, and outer protective pipe requirements for non-standard polyurethane insulated pipelines are completely produced according to the customer's order standards.

　　Polyurethane insulated steel pipe technology supports direct buried polyurethane insulated steel pipes, which have been widely used in the market due to their innovative functions. Today, let's take a closer look at how the effectiveness and practicality of this product have been improved? Next, let's take a closer look at this product. Polyurethane direct buried insulation steel pipes have many excellent usage functions, so they have been recognized and praised by many people. The polyurethane direct buried insulation steel pipe laying scheme uses a short laying method for branch courtyard pipe networks. However, some designers currently favor compensation laying, which can reduce the occurrence of pipeline leakage. Mainly used for insulation and heat preservation of heat medium materials in pipelines and containers. Polyurethane insulation pipes are highly popular due to their excellent performance, convenient construction, and long service life. Its structure consists of three parts: outer protective layer, insulation layer, and anti leakage layer. The excellent characteristics of polyurethane insulation pipes are widely recognized by customers and have become a substitute for traditional insulation forms, with significant energy-saving effects. The use of direct buried heating pipeline technology for black jacket insulation pipes marks a new starting point in the development of heating pipeline technology in China. With the decreasing energy and increasing demand, energy conservation, emission reduction, and environmental protection have become global development trends, and local governments are also vigorously promoting the development, application, and industrialization of energy-saving, emission reduction, and environmental protection products. Introduction from Cangzhou Youtong: 3. Polyurethane rigid foam has an ideal impermeability due to its continuous and dense skin and nearly high-strength interconnected walls with closed pores. High temperature prefabricated buried insulation pipe 5 is safe. From the perspectives of energy conservation, cost reduction, shortened construction period, and environmental protection, polyurethane insulated buried pipes not only have technical and practical performance that traditional trench and overhead pipeline laying methods cannot match, but also have significant social and economic benefits.

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