Dongtai City Directly Buried Prefabricated Insulation Pipeline Production Line

Dongtai City Directly Buried Prefabricated Insulation Pipeline Production Line

Thermal insulation pipe is used for central heating, cooling and hot oil transmission and distribution. The steel pipe and polyethylene outer protective pipe of thermal insulation pipe are tightly combined with polyurethane foam thermal insulation materials. The range of pipe diameter isΦ90～Φ1240,The full name of the insulation pipe is high-density polyethylene polyurethane rigid foam foam insulation pipe. Its function is to protect the temperature of the fluid inside the work pipe, prevent heat transfer with the outside world, and cause the loss of fluid temperature.

Polyurethane thermal insulation pipe: 1. Brief introduction of polyurethane thermal insulation pipe, which is a thermal insulation pipe using rigid polyurethane foam as thermal insulation material. Needless to say, rigid polyurethane foam is composed of internal medium pipe, intermediate rigid polyurethane foam thermal insulation layer and external protective layer.

Dongtai City Directly Buried Prefabricated Insulation Pipeline Production Line
2. Classification: Its classification method is very complex, and there are generally several ways according to people's habits
2.1. According to the laying method, it can be divided into: directly buried polyurethane insulation pipe and overhead polyurethane insulation pipe;
2.2. According to the temperature of the conveying medium, it can be divided into: normal temperature polyurethane insulation pipe, high temperature polyurethane insulation pipe, and deep cold polyurethane insulation pipe;
2.3. According to the different outer protective layers, it can be divided into: fiberglass outer protective layer polyurethane insulation pipe, high-density polyethylene outer protective layer polyurethane insulation pipe, steel outer protective layer polyurethane insulation pipe, and other outer protective layer insulation pipes;
2.4. There are many different types of transmission media: polyurethane prefabricated insulation pipes for water supply, high-temperature resistant polyurethane insulation pipes, directly buried polyurethane composite prefabricated insulation pipes for steam transmission, buried rigid polyurethane foam plastic anti-corrosion insulation pipes for petroleum, etc.
There are many other terms used, such as polyurethane buried pipe, polyurethane prefabricated pipe, polyurethane direct buried prefabricated pipe, polyurethane jacket pipe, polyurethane foam insulation pipe, etc., which will not be further introduced here
3. Several commonly used polyurethane insulation pipes
3.1 Polyurethane insulation pipes for centralized heating supply and return water
Its structure is composed of high-density polyethylene outer protective layer or glass fiber reinforced plastic outer protective layer, rigid polyurethane foam plastic insulation layer and internal steel pipe. According to actual requirements, there may be other structures such as alarm lines, brackets, etc., and other insulation materials composite layers may also be needed

three-way
The processing and installation method is the same as that of straight pipes, and the metal protective layer of branch pipes and straight pipes is fixed with rivets.
flange

The thickness of the insulation layer can be checked using a needle thickness gauge or a steel probe. During inspection, insert the probe vertically until it reaches the equipment or pipeline wall, and then measure the thickness with a steel ruler. The reading accuracy should reach ± 1mm.
The sampling points for quality inspection are to randomly check three locations every 30m2 for equipment and one location every 20m for pipelines. When one of the items is found to be unqualified, additional sampling points should be taken for re inspection. If half of the items are still unqualified, the item should be deemed unqualified.