Changzhou polyurethane insulation pipe

Changzhou polyurethane insulation pipe 1. Working steel pipe: According to the technical requirements of the conveying medium, seamless steel pipe, double-sided submerged arc spiral welded steel pipe are used respectively. 2. Thermal insulation layer: rigid polyurethane foam. 3. Protective shell: Made of high-density polyethylene or fiberglass. Insulation pipe manufacturer/Liaocheng insulation pipe high-quality supplier/Shandong insulation pipe supply 4. Leakage alarm line: Manufacturing prefabricated polyurethane direct buried insulation in the insulation layer near the steel pipe, with an alarm line buried

Changzhou polyurethane insulation pipe

The prefabricated polyurethane direct buried insulation pipe mainly consists of four parts.

1. Working steel pipes: According to the technical requirements of the conveying medium, seamless steel pipes, double-sided submerged arc spiral welded steel pipes are used.

2. Thermal insulation layer: rigid polyurethane foam.

3. Protective shell: Made of high-density polyethylene or fiberglass.

4. Leakage alarm line: When manufacturing prefabricated polyurethane buried insulation pipes, an alarm line is buried in the insulation layer near the steel pipe. Once a leakage occurs in a certain part of the pipeline, the transmission of the alarm line can trigger an alarm on the detection instrument and display the accurate location and degree of the leakage, so as to notify maintenance personnel to quickly deal with the leaking pipe section and ensure the safe operation of the heating network.

Summary of the Development of Polyurethane Insulation Pipes in Changzhou, Jiangsu

Prefabricated polyurethane direct buried insulation pipes have good mechanical and thermal insulation properties, and can withstand high temperatures of up to 120 ℃ under normal circumstances. By modification or combination with other insulation materials, they can withstand high temperatures of up to 180 ℃, making them suitable for insulation projects of various cold and hot water high and low temperature pipelines.

Compared with traditional trench laying pipelines, it has the advantages of good insulation performance, simple construction and installation, less land occupation, low engineering cost, and short construction period. Especially in terms of energy saving, it is the best insulation pipeline in the current situation. According to the test report of Tianjin Energy saving Technology Service Center, in a pipeline buried at a depth of about one meter, the temperature drops by 0.1 ℃ every 100 meters, and the heat loss rate per 100 meters is 2.07%. In general, one kilometer of insulation pipeline can save 10.4 tons of standard coal per year. 'Pipe in pipe' insulation pipe

2、 Compared with other insulation materials, polyurethane direct buried insulation pipe material has better insulation performance. Hard polyurethane foam plastic is a high-performance insulation material with closed cell structure, and the thermal conductivity (0.007W/m.K) of the gas (Freon F11) in the closed cell is extremely small. Therefore, the insulation performance of polyurethane direct buried insulation pipe material is lower than almost all other insulation materials. Compared with other insulation materials, it can achieve the same insulation and reduce the thickness of the insulation layer by 30-80%. Overview of high-density low-pressure polyethylene (HDPE) outer protective layer polyurethane direct buried insulation pipe Overview of HDPE outer protective layer polyurethane direct buried insulation pipe Overview of energy-saving direct buried insulation pipe is composed of steel pipe, anti-corrosion layer, insulation layer, and anti-corrosion and compressive protection layer. If it is an ultra-high temperature pipeline, an additional cooling layer is added between the insulation layer and anti-corrosion layer. These pipelines have the advantages of low heat loss, strong compression resistance, and good waterproof and anti-corrosion performance. The service life is generally around 40-50 years. Compared with traditional trench laying pipelines, it has the advantages of good insulation performance, simple construction and installation, less land occupation, low engineering cost, and short construction period. Especially in terms of energy saving, it is the best insulation pipeline in the current situation. According to the test report of Tianjin Energy saving Technology Service Center, in a pipeline buried at a depth of about one meter, the temperature drops by 0.1 ℃ every 100 meters, and the heat loss rate per 100 meters is 2.07%. In general, one kilometer of insulation pipeline can save 10.4 tons of standard coal per year.

　　

Trench type polyurethane foam prefabricated insulation pipeline

In order to meet the special needs of pipeline trench laying, Rongbang Anti corrosion and Insulation Materials Co., Ltd. in Dacheng County has developed polyurethane insulation pipelines and accessories for underground pipeline trench laying, which can be used to transport high-temperature hot water with a long-term operating temperature of 140 ℃.

Technical advantages:

Easy to install on site; Good insulation and waterproof effect; Low heat loss; Low maintenance workload; A service life of over 30 years.

Thermal expansion of buried pipelines: The thermal expansion of pipelines is the first factor to be considered in the design and calculation of thermal pipelines. The thermal expansion of the working steel pipe is calculated using the following formula: △ L=α L (t-to). In the formula, △ L represents the thermal expansion of the pipeline, M represents the linear expansion coefficient of the steel, m/(m ℃) represents the length of the pipeline, m represents the working temperature of the pipeline, and ℃ represents the installation temperature of the pipeline. Example 1: For a DN200 buried pipeline, the working steel pipe is 219 × 6, and the intermediate steel pipe is 480 × 6. The thickness of the aluminum silicate centrifugal glass wool composite insulation layer is 110mm. The pressure of the transported superheated steam is 1.6MPa, the temperature is 350 ℃, and the pipeline installation temperature is 20 ℃. Calculate the thermal expansion of each meter of the pipeline. Fiberglass wrapped pipeline is a lightweight, high-strength, and corrosion-resistant non-metallic pipeline. It is made by winding glass fibers with resin based weight layer by layer on a rotating core mold according to the process requirements, and evenly laying quartz sand as a sand layer at a long distance between the fibers. The pipe wall structure is reasonable, which can fully utilize the role of materials, improve the rigidity while meeting the requirements of strength, and ensure the stability and reliability of the product. Fiberglass reinforced plastic with sand is widely accepted by users due to its excellent chemical corrosion resistance, lightweight and high strength, no scaling, strong seismic resistance, long service life compared to ordinary steel pipes, low comprehensive cost, fast installation, safety and reliability.

structural characteristics

(1) Corrosion resistance: The material is chemically inert, with excellent corrosion resistance, and different corrosion-resistant pipelines can be selected according to the conveying medium.

(2) High mechanical strength: It has good water pressure resistance, external pressure resistance, and impact resistance, and can design and manufacture pipes and fittings according to the required pressure.

(3) Strong temperature adaptability: Operating temperature range: greater than -70 degrees Celsius and less than 250 degrees Celsius, pipeline does not crack under frozen medium.

(4) Low fluid resistance: The inner wall of the pipeline is smooth with a roughness coefficient of 0.0084. Under the same flow rate, the pipe diameter can be reduced.

(5) Lightweight and Long Lifespan: Lightweight, easy to transport, low construction costs, no need for maintenance, and a service life of over 50 years.

(6) Maintain water quality: non-toxic, can transport drinking water and maintain long-term water hygiene.