Safety Performance of Directly Buried Foam Plastic Cold Water Insulation Pipe

There are more and more types of thermal insulation building materials on the market for the safety performance of direct-buried foam cold water insulation pipes. Among them, the insulation products of the mechanical seal factory of polyurethane materials will be enough for consumers to look at for a period of time. The price is still very concerned. Considering the overall market development trend, according to the development situation of prefabricated polyurethane insulation pipes, the price of direct buried insulation pipes has been greatly reduced compared with the previous period, which is undoubtedly good news for consumers. Prefabricated polyurethane insulation pipes are usually used in the central heating system of the seal factory in the urban residential area. The water temperature generally does not exceed 120 degrees Celsius. Therefore, the methods used are one-time compensation direct burying method and uncompensated direct burying method. , The first one-time compensation for direct buried laying, during construction, a compensator is needed to compensate a part of the total deformation of the pipeline. It is generally suitable for working environments below 120 degrees Celsius and pipelines with working pressure less than 1.6MPa; This kind of mechanical seal laying for uncompensated direct buried pump uses the resistance between the soil and the outer pipe to fix the pipeline, no additional tools such as compensators and fixing brackets are needed, and the construction is very convenient. The prefabricated thermal insulation pipe fittings are composed of steel pipes, FRP inner sheaths, and FRP shells, and are characterized in that they also include a high temperature resistant thermal insulation layer, a lubricating layer, and elastic seals. The prefabricated thermal insulation pipe fitting of the utility model effectively solves the thermal insulation, sliding lubrication and waterproofing of the exposed pipe ends of the prefabricated direct-buried thermal insulation pipe/prefabricated thermal insulation pipe fitting for high temperature heat transmission at 130°C-600°C in the urban central heating. The composition of prefabricated thermal insulation pipe fittings: (1) Working steel pipe: According to the technical requirements of the conveying medium, seam steel pipe, seamless steel pipe, double-sided submerged arc spiral welded steel pipe are used respectively. (2) Insulation layer: use rigid polyurethane foam. (3) Protective shell: use high-density polyethylene or glass fiber reinforced plastic. (4) Leakage alarm line: When manufacturing high-temperature prefabricated direct-buried insulation pipes, an alarm line is embedded in the insulation layer close to the steel pipe. Once a leak occurs in a certain part of the pipe, it can be detected in a special inspection instrument through the conduction of the alarm line. The upper alarm will show the exact location of the water leakage and the extent of the leakage, so that the maintenance personnel can be notified to quickly deal with the leaking pipe section and ensure the safe operation of the heating network. Manufacturers supply direct-buried heating pipes, polyurethane direct-buried thermal insulation pipes, manufacturers prefabricated direct-buried polyurethane thermal insulation pipes, and prefabricated polyurethane pipe manufacturers offer two types of thermal insulation pipes: plastic sheathed steel thermal insulation pipes (high-density polyethylene direct-buried thermal insulation pipes) With steel sleeve steel insulation pipe (high temperature steam insulation pipe). Keywords: seal factory, mechanical seal factory, pump mechanical seal