Plastic sheathed steel directly buried insulation for water conveyance Steel pipe
polyurethane Direct burial Thermal insulation pipe Classification:
1 Plastic sheathed steel insulation pipe:
Plastic sheathed steel insulation pipe is made of high-density polymer ethylene The outer sleeve, polyurethane foam insulation layer and inner working steel pipe are closely combined.
2. Steel sheathed steel insulation pipe:
The steel sheathed steel insulation pipe is composed of external protective steel pipe plus steel pipe anti-corrosion, polyurethane foam insulation layer and internal working steel pipe.
Specification of polyurethane directly buried insulation pipe DN15~DN1200
Product name Core Pipe Mass core pipe diameter (mm) Insulation layer thickness (mm) Type of outer protective pipe
Polyurethane directly buried thermal insulation pipe seamless steel pipe Φ 25 --- Φ 1220 30 --- 70 high-density polyethylene jacket pipe, anti-corrosion steel pipe, wrapped glass steel pipe
Longitudinal welded pipe Φ 25 --- Φ 219
Spiral welded pipe Φ 159 --- Φ 1220-
List of pipe diameters: Φ 25, 32, 48, 57, 76, 89, 108, 114, 133, 159, 219, 273, 325, 377, 426, 478, 529, 630, 720, 820, 920, 1020, 1220mm
It is applicable to directly buried laying of fluid pipelines below 130 ℃ (such as hot spring, hot water, air conditioning water, etc.)
Meet CJ/T114-2000 CJJ/T81-98
Advantages of polyurethane directly buried thermal insulation pipe: polyurethane directly buried thermal insulation pipe has the characteristics of heat preservation, waterproof, anti-corrosion, heat insulation, sound insulation, flame retardant, cold resistance, corrosion resistance, light capacity, high strength, simple and fast construction, and fear of plant root thorns. It has become the thermal insulation, waterproof, plugging, and sealing of industrial departments such as construction, transportation, petroleum, chemical, power, and refrigeration.
The polyurethane directly buried insulation pipe is used for the insulation and cold insulation engineering of various indoor and outdoor pipelines, central heating pipelines, central air-conditioning pipelines, chemical, pharmaceutical and other industrial pipelines, oil pipeline engineering, steam transmission and other pipeline projects. Since the polyurethane synthetic material was born in the 1930s, polyurethane directly buried thermal insulation pipe has been developed rapidly as an excellent thermal insulation material, and its application scope is more and more extensive, due to its simple construction, energy conservation and anti-corrosion.
Prefabricated polyurethane directly buried insulation pipe adopts directly buried heating pipe technology, marking that China's heating pipe technology has entered a new starting point.
1. Pipes shall be hoisted with slings with a width greater than 50mm.
2. During loading and unloading, it shall be lifted steadily and placed gently to prevent bumping.
3. During unloading, the vertical lifting method should be used for truck loading. Forklifts and loaders can be used for container loading.
4. It is forbidden to use iron tools to pry or steel wire rope to directly bind the outer sleeve when stacking and hoisting pipes.
Plastic sheathed steel directly buried insulated steel pipe for water conveyance
Polyurethane prefabricated directly buried insulation pipe is a type of insulation pipe vigorously developed in the 21st century. Compared with traditional insulation pipe, it has some similarities, but has many differences. What's the difference between them? Let's analyze their differences.
Analyze the difference from three aspects.
One aspect is the structure and performance of insulation pipe. The structure of polyurethane prefabricated directly buried insulation pipe is composed of inner protective layer, insulation layer and outer protective layer from inside to outside. The inner protective layer is a steel pipe conveying medium, which has good corrosion resistance and waterproof performance. The rigid polyurethane foam insulation layer between the steel pipe and the outer protective layer is formed by the pipe in pipe foaming technology to closely combine the three. The outer protective layer is high-density polyethylene outer sleeve. In general, polyurethane prefabricated directly buried insulation pipe has better thermal insulation performance than traditional insulation pipe, and has better thermal insulation and cold insulation effect.
The second aspect is industrial production. The polyurethane prefabricated directly buried insulation pipe is pre customized, which is more conducive to the actual production and life of insulation pipe application, and has great flexibility and adaptability. Direct buried insulation pipe with different parameters can be designed according to different needs.
The third aspect is the laying method. The traditional insulation pipe is laid in trench and overhead, with high project cost and long construction time. However, polyurethane prefabricated directly buried insulation pipes are directly buried, which occupies less land, is simple and fast in construction, and is conducive to environmental protection. From these three aspects, we can clearly see the difference between polyurethane prefabricated directly buried insulation pipe and traditional insulation pipe. With the change of time, the generation of new things and the demise of old things, the traditional insulation pipes have been gradually replaced by polyurethane prefabricated directly buried insulation pipes.
Polyurethane insulation pipe has the characteristics of small heat loss, strong compression resistance, good anti-corrosion and waterproof performance. It is especially suitable for areas with high groundwater level. Compared with the traditional trench laying pipeline, it has a series of advantages such as good thermal insulation performance, corrosion prevention, good insulation performance, long service life, simple construction and installation, small floor area, low project cost, etc. It has been widely used in central heating, oil transportation, chemical industry, refrigeration, water supply in cold regions and other projects.
Polyurethane insulation pipe is used for insulation, cold insulation, oil pipeline, steam transmission and other pipeline projects of various indoor and outdoor pipelines, central heating pipelines, central air-conditioning pipelines, chemical, pharmaceutical and other industrial pipelines. Since the birth of polyurethane composition materials in the 1930s, rigid polyurethane insulation pipes have been rapidly developed as a kind of thermal insulation materials, and their application scale has become more and more extensive. Because of their simple construction, obvious energy-saving and anti-corrosion effects, they are widely used in various heat supply, refrigeration, oil transmission, steam transmission and other pipelines.
Prefabricated directly buried insulation pipes are widely used in liquid and gas transmission pipe networks, chemical pipeline insulation projects, petroleum, chemical, central air conditioning ventilation pipelines, municipal projects, etc. High temperature prefabricated directly buried thermal insulation pipe is a kind of directly buried prefabricated thermal insulation pipe with good thermal insulation performance, safety and reliability, and low project cost. It effectively solves the problems of heat preservation, sliding lubrication and waterproof at pipe ends of prefabricated directly buried heat preservation pipes for 130 ℃ - 600 ℃ high temperature heat transmission in urban central heating.
Prefabricated polyurethane insulation pipe is composed of steel pipe conveying medium, polyurethane rigid foam insulation layer and high-density polyethylene outer sleeve. This product is mainly used in urban central heating pipe network, oil transmission pipeline, water transmission pipeline in cold regions and industrial pipeline engineering in the plant area. It has the advantages of heat preservation, waterproof and anti-corrosion, simple construction, and is not afraid of plant root thorns, No trench laying is required for construction, and it can be directly buried in 0.6-1.2m frozen soil layer. The heat loss can be reduced by 40% compared with the traditional process, and the service life is more than 3-5 times longer than other thermal insulation and anti-corrosion materials, and the service life can reach 30-50 years.
Performance index of prefabricated polyurethane insulation pipe: the overall performance of directly buried insulation pipe is excellent, and the shot blasting and rust removal treatment on the outer surface of steel pipe and corona treatment on the inner surface of external protection pipe are strictly implemented to further improve the bonding performance of insulation pipe. The insulation layer is made of rigid polyurethane foam with a density of 60kg/m3 to 80kg/m3, which can fully fill the gap between the steel pipe and the casing, and has a certain bonding strength, so that the steel pipe, the outer casing and the insulation layer form a solid whole.
