Puyang polyurethane insulation pipe manufacturer offers affordable prices in Dacheng, Shandong

Product structure form: Prefabricated buried steam insulation pipe consists of core tube (working steel pipe) rent reduction layer, insulation layer, reflection layer, fastening steel strip, sliding bracket, air layer, outer protective steel pipe, sprayed polyurethanePuyang polyurethane insulation pipe manufacturer offers affordable prices in Dacheng, ShandongComposed of wrapped fiberglass. Precautions for polyurethane insulation pipes: 1. It is necessary to truly understand that the direct burial method of heating pipelines can be divided into two types: compensated direct burial and uncompensated direct burial, during design and construction. To truly understand the working principles, characteristics, and application scenarios of each method, in order to make reasonable choices in design and ensure safe, reliable, and economical construction. 2. Conduct a thorough inspection after entering the site, and conduct research on the manufacturers of prefabricated buried insulation pipes before construction. Refuse to use unqualified insulation pipes. 3. Welding of polyurethane insulation pipes is a key task to ensure engineering quality during the construction of prefabricated buried pipelines. 4. The construction quality of various well chambers directly affects the engineering quality and the service life of pipelines, including fixed brackets. If the waterproofing of the well chamber is not good, it will cause damage to the components due to immersion in water. Therefore, construction should be carried out carefully,Puyang polyurethane insulation pipe manufacturer offers affordable prices in Dacheng, ShandongEnsure construction quality. 5. Under the condition of pressure, it is necessary to pay attention to the pressure of prefabricated buried insulation pipelines. First, fill the water and exhaust the air, 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. 6. Due to the prefabricated direct buried insulation pipe being buried underground, the project has been accepted. The vast majority of them belong to concealed projects. If the completion acceptance is not careful and the completion data is not detailed, it will affect future use. 7. The joint and backfill soil should be tested for pressure in the pipeline. Completion measurement and cleaning can only be carried out after completion, and the specified thickness of sand must be backfilled according to the construction characteristics of polyurethane insulation pipes. Cutting corners is strictly prohibited. Sufficient attention must be paid to this. The on-site joint insulation of prefabricated buried insulation pipes must be carried out after passing the pressure test, and the on-site joint insulation construction can be carried out. The construction quality of prefabricated buried insulation pipelines directly affects their service life. There are two methods for insulation layer: on-site foaming construction and insulation tile constructionRegardless of which method is used for construction, defects such as circular space, cracking, and delamination must not occur. There are various methods for maintaining the layer (such as high-density polyethylene and fiberglass protective layer), but the integrity, tightness, and waterproofness of the joint must be ensured. The slow starting speed of polyurethane insulation pipes usually occurs during autumn, winter or morning construction, due to sudden drops in temperature or low temperatures. Raising the ambient temperature and black material temperature can solve the problem. Generally, raising the temperature of the black material to 30-60 ℃ and the ambient temperature to 20-30 ℃ is sufficient.