foaming polyurethane Prefabrication Insulated pipeline manufactor
In the piping system, Elbow It changes the direction of the pipeline pipe fitting 。 According to the angle, there are three kinds of common ones, in addition, according to the needs of the project other Abnormal angle elbow. Elbow materials include cast iron, stainless steel, alloy steel, malleable cast iron, carbon steel, non-ferrous metals and plastics. The connection methods with pipes include: flange connection, hot-melt connection, electrofusion connection, threaded connection, socket connection, etc. According to the production process, it can be divided into: welding elbow, stamping elbow, casting elbow, etc. Other names: degree bend, right angle bend, love bend, etc.
（ one ）Polyurethane insulated steel pipe working steel pipe: according to the technical requirements of the transmission medium, seamed steel pipe, seamless steel pipe and double submerged arc spiral welded steel pipe are used respectively.
（ two ）Polyurethane insulated steel pipe insulation layer: rigid polyurethane foam plastic is used.
（ three ）Polyurethane insulation steel pipe protective shell: high density or glass fiber reinforced plastic.
（ four ）Leakage alarm line of polyurethane insulated steel pipe: when manufacturing high-temperature prefabricated directly buried insulated pipe, an alarm line is embedded in the insulation layer close to the steel pipe. Once leakage occurs somewhere in the pipe, through the conduction of the alarm line, it can alarm on the special detection instrument and display the exact location of the leakage and the size of the leakage, so as to notify the maintenance personnel to quickly deal with the leaking pipe section, Ensure the safe operation of the heating network.
Pay attention to the following requirements during installation:
one Before the pipeline is laid into the trench, the anti-corrosion coating on its external surface shall be carefully checked. If the anti-corrosion coating is damaged, it shall be treated in time.
two During pipe butt welding, the concentricity of the working steel pipe and the outer casing steel pipe, the design axis and gradient of the pipe shall be ensured.
three Before the joint construction of directly buried insulation pipe, the transportation support welded at both ends shall be removed.
four . During joint construction; In case of ponding in the pit, the ponding in the pit shall be removed first. Sundries and sand in the pipeline shall be removed.
five Prefabricated insulation pipe can be hoisted into the trench for installation, or two Hoisting shall be carried out after assembly and welding of pieces or pieces. When the assembled and welded pipe section is long, two or more cranes should be used to lift the pipe and lower the pipe. The position of the lifting point should be selected according to the balance condition. It is strictly prohibited to push the pipe directly into the trench
six Chlorine arc welding shall be used as backing for the welding of working steel pipes. The welding shall be completed and one hundred ％ X Heat preservation at joints and welding of outer casing can be carried out only after radiographic inspection
seven Drain pipe shall be horizontally connected to the ground. The moisture discharge pipe shall be connected from the upper part of the directly buried pipe until it is exposed to the ground. Anti corrosion measures shall be taken for drain pipes and moisture discharge pipes.
eight After the joint welding of the pipe between two fixed points is completed, the air tightness test of this section of pipe shall be carried out to check whether the welding of the outer sleeve is qualified.
nine The anti-corrosion treatment of the joint can be carried out only after the gas tightness test of the welds of the outer casing is qualified. Then fill sand and earth as required.
ten The welding and inspection of working steel pipes, heat preservation at joints, welding and inspection of outer casing, anti-corrosion treatment at joints, sand filling and earth filling shall be closely coordinated. In this way, not only the construction period can be guaranteed, but also the directly buried insulation pipe can be protected from rain and other erosion, so that it can be protected in time.
eleven When the project is completed on that day, the pipe end shall be blocked with a blind plate, and fat mud and water shall enter the pipe.
Polyurethane insulation pipe has good thermal insulation performance, and its heat loss is only that of traditional pipes 25% Long term operation can save a lot of energy and significantly reduce energy costs. The polyurethane insulation pipe has strong waterproof and corrosion resistance. It can be directly buried in the ground or water without the need of pipe trench. The construction is simple and rapid, and the comprehensive cost is low. The service life of polyurethane insulation pipe can reach 30-50 Correct installation and use can make the maintenance cost of pipe network extremely low. The polyurethane insulation pipe can be equipped with an alarm system to automatically detect the leakage fault of the pipe network, accurately indicate the fault location and automatically alarm.
More related products: polyurethane insulation pipe, polyurethane directly buried insulation pipe, polyurethane foaming polyurethane foaming insulation pipe, prefabricated directly buried insulation pipe, polyurethane jacket insulation pipe, polyurethane foaming insulation material, the trinity directly buried insulation pipe produced by the company's introduction of high-pressure complete polyurethane foaming equipment, has excellent overall performance Strictly implement the shot blasting and rust removal treatment on the outer surface of the steel pipe and the corona treatment process on the inner surface of the outer protective pipe to further improve the bonding performance of the insulation pipe.
Polyurethane insulation pipe is popular for its excellent performance, convenient construction and long service life. Its structure is : The outer protective layer, thermal insulation layer and anti leakage layer are made of polyethylene or glass fiber reinforced plastic or other materials. The laying methods include direct burial, overhead laying and trench laying.
Polyurethane insulation pipe can be used alone or embedded directly. Its good energy-saving effect and high cost performance ratio are generally recognized by people. Therefore, energy conservation continues and polyurethane pipe insulation applications continue!
Foamed polyurethane prefabricated insulation pipe manufacturer
Layout features:
（ one ）Corrosion resistance: chemical lazy raw materials have excellent corrosion resistance, and different corrosion resistant pipes can be selected according to the transport medium.
（ two ）High mechanical strength: excellent water pressure resistance, external pressure resistance and impact resistance, and can be used to manufacture pipes and fittings according to the pressure demand.
（ three ）Strong temperature adaptability: application temperature scale: greater than -70 Degrees Celsius less than two hundred and fifty The pipeline will not crack under freezing medium.
（ four ）Low fluid resistance: pipeline inner wall lubrication, roughness coefficient 0.0084, Under the same flow , The pipe diameter can be reduced.
（ five ）Light weight, long service life: light weight, convenient transportation, low construction cost, no repair, long service life fifty More than years.
（ six ）Adhere to water quality: transport drinking water, and keep the water quality clean for a long time.
The directly buried insulation pipe has very prominent advantages:
one Polyurethane directly buried insulation pipe has good thermal insulation performance, and its heat loss is only that of traditional pipes 25% Long term operation can save a lot of energy and significantly reduce energy costs.
two With strong waterproof and corrosion resistance, it can be directly buried into the ground or water without the need for pipe trenches, which is simple and rapid in construction and low in comprehensive cost.
three It also has good corrosion resistance and impact resistance under low temperature conditions, and can be directly buried in underground frozen soil.
four Service life can reach 30-50 Correct installation and use can make the maintenance cost of pipe network extremely low.
five Alarm system can be set to automatically detect pipe network leakage fault, accurately indicate fault location and automatically alarm.
six Service life can reach 30-50 Years. Pipe diameter: DN15--DN600 , purpose : Centralized heating pipeline, refrigeration pipeline, industrial pipeline, etc.
seven Oxygen index: ≥27 Density: 40--70kg/ cube m Hydrophobic rate: 0.03kg/ cube cm thermal conductivity :0.022kcal/m.h. ℃
Production process 1, feeding 2, extrusion 3, mold 4, cooling 5, traction 6, corona treatment of inner surface 7, cutting 8, inspection 9, finished product
explain
A. Polyethylene pipe is prone to aging. If it is stored in the open air, it should be covered with tarpaulin and other materials. The stacking place should be far away from high heat source and fire source. After the insulation pipe is made, it is prohibited to expose to the sun and cool suddenly, otherwise the polyethylene pipe is prone to cracking, affecting the product performance and service life.
B. During transportation and pipe threading, rough loading and unloading shall be avoided, and the hook shall be too thin, too hard and too hard, otherwise the polyethylene pipe may be damaged, scratched or torn.
C. The wall thickness of the pipe can be adjusted, and the wall thickness and color can be produced according to the user's requirements. Due to the different wall thickness of the pipe, the thickness of the insulation layer is approximately, which should be calculated according to the actual thickness.
D. Supports, plastic plugs, flange plates at both ends, welding rods, welding guns, heat shrinkable tapes, etc. matched with pipes are complete
E. The allowable deviation in the table is formulated according to CJ/114-2000 industry standard.
The calculation formula is: when the outer diameter is ≤ 400mm, the sum of upper and lower deviations=0.1 × nominal wall thickness 0.2
When the outer diameter is ≥ 400mm, the sum of upper and lower deviations=0.15 × nominal wall thickness 0.2
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.
Polyurethane insulation pipe is widely used in liquid and gas transmission pipe network, chemical pipeline insulation engineering, petroleum, chemical, central air conditioning ventilation pipeline, municipal engineering, 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.
The high-temperature prefabricated directly buried insulation pipe not only has the advanced technology and practical performance of the traditional trench and overhead laying pipeline, but also has significant social and economic benefits, and is also a powerful measure for heat supply and energy conservation. The high-temperature prefabricated directly buried insulation pipe can play a good anti-corrosion role because the polyurethane rigid foam insulation layer is closely bonded to the steel pipe skin, which can isolate the infiltration of air and water. At the same time, its foam pores are closed, and its water absorption is very small. The high-density shell of polyurethane insulation pipe and the fiberglass shell of polyurethane insulation pipe have good anti-corrosion, insulation and mechanical properties.
Overview of directly buried thermal insulation pipes: directly buried thermal insulation pipes can be directly buried in 0.6-1.2m frozen soil layer (so people are used to calling them directly buried thermal insulation pipes or prefabricated thermal insulation pipes), the heat loss can be reduced by more than 40% compared with ordinary pipes, the working life can be increased by more than 3-5 times compared with other thermal insulation and anti-corrosion materials, and the service life can reach 30-50 years; The quality meets or exceeds the Chinese industry standards. Its complete thermal insulation system is characterized by low overall project cost, short construction period, long service life, energy conservation, environmental protection, etc. The continuous operating temperature is 130 º C, and the peak height can reach 150 º C.
● Specification of directly buried insulation pipe DN15~DN1200
● Applicable to direct burial of fluid pipes below 130 ℃ (such as hot spring, hot water, air conditioning water, etc.)
● Meet CJ/T114-2000 and CJJ/T81-98 standards
● Professional equipment and advanced technology ensure superior quality
● Professional equipment and advanced technology ensure superior quality
● Direct burial laying and installation are convenient and fast
The directly buried insulation pipe, also known as "pipe in pipe", is composed of a "two-step method", which is composed of high-density polyethylene outer protective layer, polyurethane rigid foam plastic insulation material and steel pipes. 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.
