Polyurethane spiral steel pipe price, hot water direct buried insulation steel pipe factory

Description :

　　Polyurethane direct buried insulation pipe is an ideal laying method for heating and cooling pipelines, which has the advantages of saving investment, saving land, beautifying the environment, conserving energy, ensuring safe operation, and saving operation and maintenance costs. It has been highly praised by users and has a service life of over 50 years in practical use and related testing.

　　1、 Product scope of application: Conveying medium: hot water, air drying water, medium pressure: ≤ 1.6MPa, medium temperature: ≤ 120 ℃, working environment: underground soil.

　　2、 The product structure insulation pipe is a prefabricated pipe which is composed of steel pipe, cyanogen corrosion agent, polyurethane rigid foam insulation layer and high-density polyethylene outer sleeve.

　　3、 Product material technical requirements: 1. Seamless steel pipes for fluid transportation (GB8163-99) or spiral seam submerged arc welded steel pipes for pressurized fluid transportation (SY5036-83) can be used for steel pipes. Other materials such as copper pipes or stainless steel pipes can also be used according to customer requirements. 2. The anti-corrosion material uses cyanide corrosion inhibitor as the bottom layer for anti-corrosion.

　　The structure of prefabricated polyurethane direct buried insulation pipes can be divided into three layers from inside to outside: Precautions for polyurethane direct buried insulation pipe joints: 1. It is necessary to truly understand the two types of direct buried laying methods for heating pipelines: compensated direct buried laying and uncompensated direct buried laying. It is essential to grasp the working principles, characteristics, and application scenarios of each method in order to make reasonable choices in design, and to ensure safe, reliable, and economical construction. 2. After entering the site, conduct a thorough inspection. Before construction, it is necessary to conduct research on the polyurethane manufacturers and refuse to use any insulation pipes that do not meet the standards. 3. In the construction of prefabricated buried pipelines, welding of polyurethane insulation pipes is a key task to ensure project quality. 4. Under the condition of pressure, it is necessary to pay attention to the pressure of polyurethane insulated pipelines. Firstly, water and exhaust the air, and then do it in two steps: stabilize the pressure for 10 minutes without any leakage. Strength test: Raise the pressure inside the pipeline to 1.5 times the working pressure; Use a 1kg small hammer to knock and inspect the welds one by one around the weld seam. Conduct a tightness test: when the pressure inside the pipe is reduced to the working pressure, if there is no leakage for 30 minutes and the pressure drop does not exceed 0.2 atmospheres, it is considered qualified; Pressure test records should be kept in accordance with regulatory requirements. 5. Due to the fact that polyurethane insulation pipes are buried underground, the engineering acceptance must be careful. If the completion acceptance is not careful and the completion data is not detailed, it will affect future use.

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