Integral prefabrication Thermal insulation pipe price list, polyurethane Supply of directly buried pipes
Polyurethane insulation pipe, also known as jacket pipe, is made of high-density poly ethylene External maintenance layer, polyurethane rigid foam plastic pipe and Steel pipe form. The polyurethane insulation pipe project has low cost, less land occupation and fast construction. The polyurethane insulation pipe saves energy, has anti-corrosion, good insulation function and long service life. In addition, polyurethane insulation pipes are equipped with leakage * * * lines, which are safe. once The Conduit In case of leakage at some place, through the conduction of the * * * line, the accurate position and degree of leakage of the insulation pipe can be displayed on the * * * detection instrument, so as to tell the leakage detection personnel to deal with the leaking pipe section quickly and ensure the safe operation of the heating pipe network.
It has the characteristics of light volume weight, high strength, thermal insulation, sound insulation, flame retardancy, cold resistance, corrosion prevention, non water absorption, simple and convenient construction, and has become indispensable data for thermal insulation, waterproof, leak stoppage, and sealing of industrial departments such as construction, transportation, petroleum, chemical, power, and refrigeration.
1. Polyurethane insulation pipe is the insulation pipe with rigid polyurethane foam as the thermal insulation material. Needless to say, rigid polyurethane foam is composed of internal medium pipe, intermediate rigid polyurethane foam insulation layer and external protective layer.
2. Classification
The classification method is very complicated. Generally, according to people's habits, there are several ways
2.1. According to the laying method, it can be divided into: directly buried polyurethane insulation pipe and overhead polyurethane insulation pipe
2.2. It can be divided into normal temperature polyurethane insulation pipe, high temperature polyurethane insulation pipe and cryogenic polyurethane insulation pipe according to the temperature of its transmission medium;
2.3. It can be divided into: FRP polyurethane insulation pipe, high-density polyethylene polyurethane insulation pipe, steel polyurethane insulation pipe and other insulation pipes with outer sheath according to the difference of outer sheath;
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 names, such as polyurethane buried pipe, polyurethane prefabricated pipe, polyurethane directly buried prefabricated pipe, polyurethane jacket pipe, polyurethane foam insulation pipe, etc
3. Several common polyurethane insulation pipes
3.1 The structure of polyurethane insulation pipe for central heating supply and return water is generally composed of high-density polyethylene outer sheath or glass fiber reinforced plastic outer sheath, rigid polyurethane foam plastic insulation layer and internal steel pipe. According to the actual requirements, there are other structures such as * * * lines and supports, and other insulation material composite layers may also be required
3.1.1 High density polyethylene outer sheath polyurethane rigid foam prefabricated insulation pipe
a. Reference standards:
1. Europe EN253;
2. The Ministry of Construction issued CJ/T114-2000;
3. Standard issued by China National Petroleum Corporation (SY/T0415-1996);
4. CJT_155-2001 Prefabricated directly buried thermal insulation pipe fittings, etc
b. Production process:
The outer protective layer is HDPE high density polyethylene outer protective pipe, which is divided into "two-step method" and "one-step method" manufacturing process. The manufacturing process of polyurethane rigid foam insulation layer and the outer protective layer (jacket layer) of high density polyethylene for external insulation is one-step process, which we call "one-step method". First, the outer protective layer of high density polyethylene is produced, Then pour polyurethane rigid foam plastic insulation layer into the gap between the polyethylene sheath and the steel pipe. The production process is often referred to as "two-step method" and "one-step method"
Manufacturing process: steel pipe derusting - steel pipe anti-corrosion - polyurethane foaming - forming - finished product detection - warehousing.
