Cangzhou Tianyuan Anti-corrosion Engineering Co., Ltd.

Cangzhou Tianyuan Anti-Corrosion Engineering Co., Ltd.
Manager Zhang
mbr m rmhbrmIn today's daily life or industrial production process, prefabricated polyurethane insulation pipes have many applicable places, and such transportation pipes are used all the time. They are all providing selfless services to people and ensuring their safety and convenience in life and work.
mbrmh mh brm Generally speaking, prefabricated polyurethane insulation pipes are mostly used underground. Without affecting the use of the above-ground area, the transportation of these fluid media is completed in underground transportation pipelines. transportation work.
mbrmh mh brm This type of insulated pipe can not only transport some high-temperature fluid media and achieve thermal insulation characteristics during transportation, but this transportation-type pipe can also realize the function of transporting low-temperature fluid media. . Generally speaking, fluid media between
mbr m rmhbrm degree and
mbr m rmhbrm degree can be transported in this kind of pipe.
mbrmh mh brm This kind of prefabricated polyurethane insulation pipe transportation pipe is not only widely used in our country, but also used in many foreign countries to transport fluid media. In other words, he is serving people all over the world.
mbr m rmhbrm Precautions for polyurethane insulation pipes
mbrmh mhbr m must truly understand that the direct burial laying method of heating pipes is divided into two methods: compensated direct buried laying and non-compensated direct buried laying. Design and construction middle. Really understand the working principles, characteristics and application locations of the two methods so that they can be reasonably selected in design and safe, reliable and economical in construction.
mbrmh mhbr m conducts careful inspection after entering the site. Before construction, it is necessary to conduct research on the manufacturers of prefabricated directly buried insulated pipes. Refuse to use unqualified insulation pipes.
mbrmh mhbr m Polyurethane insulation pipe welding is a key task to ensure project quality in the construction of prefabricated directly buried pipelines.
mbrmh mhbr mThe construction quality of various well chambers directly affects the quality of the project and the service life of the pipes and fixed brackets. If the well chamber is not waterproof, components will be damaged due to water immersion. Therefore, construction should be carried out carefully to ensure construction quality. Anti-corrosion steel pipe
mbrmh mhbr m When the pressure conditions are met, attention must be paid to the pressure of prefabricated directly buried insulated pipes. First, fill the water and drain the air, and then do it in two steps: Stabilize the pressure
mbr m rmhbrm without leakage within 1 minute. Strength test: Raise the pressure in the pipeline to
.
mbr m rmhbrm times of the working pressure, then use a
mbr m rmhbrm small hammer to hammer and inspect the welds one by one around the welds, strictly Performance test: When the pressure in the pipe is reduced to the working pressure, it is qualified if there is no leakage for
mbr m rmhbrm minutes and the pressure drop does not exceed
. Keep pressure test records.
mbrmh mhbr mBecause the prefabricated directly buried insulated pipes are buried underground, the project has been accepted. Most of them are hidden projects. If the completion acceptance is not serious and the completion information is not detailed, it will affect future use.
mbrmh mhbr m joint, backfill soil should be tested for pressure in the pipeline. Completion measurement can only be carried out after cleaning, and the specified thickness of sand must be backfilled according to the construction characteristics of polyurethane insulation pipes. Do not cut corners
mbrmh mhbr m must be paid enough attention to. The on-site joint insulation of prefabricated directly buried insulated pipes must be carried out after passing the pressure test. On-site joint insulation construction can be carried out. This content is unique to the construction of prefabricated directly buried insulated pipes. The construction quality directly affects the service life. The insulation layer has two methods: on-site foam construction and insulation tile construction. No matter which construction method is used, defects such as annular spaces, cracking, and delamination should not occur. There are many ways to maintain the layer
(
mbr m rmhbrm such as high-density polyethylene and fiberglass protective layer
)
mbr m rmhbrm But the integrity, tightness and waterproofness of the joint must be ensured. The rise speed of polyurethane insulation pipes is slow. This phenomenon generally occurs during construction in autumn and winter or in the morning due to a sudden drop in temperature or low temperature. This can be solved by raising the ambient temperature and black material temperature. Generally, the temperature of the black material is raised to
mbr m rmhbrm
mbr m rmhbrm℃, and the ambient temperature is raised to
mbr m rmhbrm
mbr m rmhbrm℃.