Glass steel pipes

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Glass steel pipes

To illustrate, a glass steel buried pipeline foam construction

1, direct buried insulation pipe can be widely used in heating, geothermal, refrigeration, municipal construction, oil and other industrial sectors, adding flame retardant protective layer can also be used for overhead pipeline.

2, the depth of burying must ensure that load ten tons truck safety through, as far as possible, reduce heat loss, shall be laid in the ice below the line, different regions should be based on different conditions of the region specific treatment.

3, pipe trench excavation size should guarantee between the tubes, 200-250 mm interval left between the pipe and the trench wall, in order to on-site installation and joint treatment, gully bottom brick soil compaction, when necessary, available sand bedding.

4, direct buried pipe on the road, the laying depth, just not backfill soil covering is made into the trench forms in the pipe bedding, reinforced concrete plate groove or concrete casing treatment.

5, between the pipe and pipe, using welding (glass pipe connection technology and pressure test standards set separately) pipe after installation, pressure test (9 /cm L) 10 minutes buck 0.5 kg /cm - qualified, should maintain the ditch bottom water and installation of pipe welding joint, made after fully cured (48 hours) will be put into the ditch bottom pipeline, so as not to not make joint processing into the ditch, water soaking pipe joint part and reducing waterproof, anti-corrosion, insulation effect.

6, in the process of installation of the insulation pipe, can be installed on one side, the side to do joint processing, can also be installed all pressure test again after the joint processing.

(1) in order to ensure the joint waterproof, anti-corrosion, insulation effect, to ensure that joint site condition is very necessary.

(2) joint field temperature, in the operation should be kept above 10 degrees, the minimum should not lower than 5 DEG C, the winter is not suitable to do joint processing, rainy days, not suitable for joint treatment, gully bottom wet, water does not do joint processing.

Two, direct buried insulation pipe overview:

Direct buried insulation pipe is mainly composed of four parts.

1: according to the requirement of working steel pipe conveying medium technology respectively adopts a welding steel submerged arc spiral seam steel pipe, seamless steel pipe, double-sided.

The 2 insulation layer: use of rigid polyurethane foam.

3: protective shell is made of high density polyethylene or glass steel.

4 leakage alarm line: manufacturing of directly buried heat insulation pipe, in the insulation layer near the pipe, buried with the warning line, once the pipeline leakage alarm line somewhere, by conduction, can be in a dedicated instrumentation alarm and display the location and the degree of leakage Water Leakage big small, to inform the pipe repair personnel quickly processing Water Leakage, guarantee the safe operation of heat supply network.

Three, direct buried insulation pipe performance:

Direct buried insulation pipe has good mechanical performance and heat insulation performance, usually resistant to the high temperature of 120 DEG C through modification or other insulating material resistant to high temperature of 180 DEG C combination, insulation engineering applicable to all kinds of cold, hot water high temperature pipeline.

Four, the advantages of directly buried heat insulation pipe:

1, reduce project cost.

According to estimates by a relevant department, two pipe heating pipe, under normal circumstances can reduce the project cost 25% (made of glass steel as a protective layer) and 10% (using high density polyethylene as a protective layer around).

2 low heat loss, energy saving.

Direct buried insulation pipe of the thermal conductivity coefficient: lambda =0.013 - 0.03kcal/m - H - oC, other than in the past used pipe insulation material is much lower, the insulation effect is increased by 4~9 times. Again the water absorption rate is very low, about 0.2kg/m2. The reason of low water absorption is due to closed cell polyurethane foam rate around 92%. Low thermal conductivity and low water absorption rate, coupled with the thermal insulation layer and the outside good waterproof properties of high density polyethylene or glass steel shell, has changed the traditional trench laying heating pipeline "wear wet jacket" situation, greatly reducing the overall heat loss of heat supply pipeline, network heat loss is 2%, less than 10% of the requirements of international standard.

3, anti-corrosion, insulation performance is good, the service life is long.

Direct buried insulation pipe because of rigid polyurethane foam insulation layer bonded in the steel sheath, cut off the air and water infiltration, can play a good role in anti-corrosion. At the same time, foaming holes it is closed, water absorption is very small. High density polyethylene shell, glass steel shell has good anti-corrosion, insulation and mechanical properties. Therefore, the work pipe sheath hard to erosion of the outside air and water. As long as the internal pipeline water treatment, according to foreign information, directly buried insulating pipe service life can reach more than 50 years, the use of 3~4 times higher than the traditional life and trench laying overhead laying.

4 an area of small, fast construction, is beneficial to environmental protection and reduce the construction people.

Don't need laying large trench buried heating pipe, only the people buried underground heat insulation pipe, thereby greatly reducing the area, reducing the volume of earth excavation about 50% above, to reduce the amount of 90% civil masonry and concrete. At the same time, heat preservation tube processing and on-site trench parallel, simply field joints, can greatly shorten the construction period. Due to the reduction of the brick, cement, sand and gravel, the remnant soil of transportation, thereby reducing the exhaust emission in the process of construction quantity, dust emission, noise emissions, so as to protect the environment.

5, security

At present, in addition to direct buried insulation pipe production outside of China, are equipped with leakage alarm line, once the pipeline leakage alarm line somewhere, by conduction, can show the insulation pipe seepage, leakage and leakage extent accurate position in the special detecting instruments, the pipe section to inform the inspection personnel quickly processing infiltration leakage. To ensure the safe operation of heat supply network. Domestic production of thermal insulation pipe leakage current alarm line end design, need to fill this blank.

Five, direct buried insulation pipe summary:

The total


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Q:Will the model of steel profiles (such as 88-type extrusion profiles, 80 extrusion profiles) is based on what to develop ah
Press the bottom width. Plastic steel profiles are made of polyvinyl chloride (PVC) resin as the main raw material, plus a certain proportion of stabilizers, colorants, fillers, UV absorbers, etc., by extrusion of the profile. Ordinary steel profiles will be deformed, the color is relatively monotonous, usually white, if you want to change the color will add PVC with the film, a long time the PVC film will fade.
Q:Plastic doors and windows and plastic doors and windows have anything to do
According to the characteristics of profiles, the profiles are roughly divided into European and American two. European doors and windows of its characteristics are: profile formulations still use the traditional lead salt heat stabilizer, a small number of countries and enterprises began to use environmentally friendly organic tin heat stabilizer; main section of the profile profile is generally designed for three or four main chamber, The total number of chambers to 6 to 8, wall thickness is generally 2.5 ~ 3.0mm. Doors and windows with fan-fan frame structure, fan section larger, with pulley, can be removed; built-in glass, dry mosaic; window open in the foreign under the hanging window-based, a small amount of sliding window.
Q:Plastic steel window profile material
GB 8814-2004 according to the thickness of the main section of the profile will be divided into three categories of ABC, according to the "visible wall thickness minimum / non-visible wall thickness minimum" said, A type of wall thickness of 2.8 / 2.5mm, B Type of material requirements wall thickness 2.5 / 2.0mm, C type of wall thickness does not specify the requirements. The mainstream of the national standard profiles are Class B.
Q:Plastic steel profiles how to open V mouth
Plastic profile V-head saw is mainly used for steel-type 90-degree V-mouth cutting, the internal equipment by the two motors, two pieces of blade. Start the V saw when the two motors at the same time driving into a 90 degree saw blade, the steel profile cutting a 90 degree V port. Saw the saw speed, saw no burr, smooth surface. easy to use. The equipment is running smoothly. High precision. The depth of the V-shaped steel profile is half of the large surface height of the stitch (welding flux).
Q:The development of steel profiles
From the European to the American: European-style profiles are the mainstream of the market, but the rapid development of American profiles, which is due to some exports to the United States of steel-steel production enterprises driven by the United States as a lively, beautiful, delicate structure, delicate lines, Decorative, high light rate, high perspective, etc., has won the favor of consumers.As European-style profiles in China has 20 years of history, the US profile short-term can not replace the European profile in China's position. European-style profile is concerned about the fan package box, and the American profile is a box fan. Domestic steel doors and windows are basically fan package box.
Q:Plastic doors and windows profiles
Plastic doors and windows with its good insulation, insulation, sound insulation and corrosion resistance to become steel and wood windows of the alternatives, but because of the market is not mature, raw material prices soared and the price of the profile is soaring, making a lot of profiles manufacturers Not to sacrifice the quality of the material to reduce costs, in the profile by adding a lot of calcium carbonate or the use of low-cost raw materials additives, plastic window with poor quality hardware accessories, ultra-thin ribs plus rough manufacturing process, so low-performance products into After the market, to the user and the industry has brought a great negative impact, the long run, will repeat the sixties and seventies of the same mistakes.
Q:What is the material of steel
In the building construction is mainly used for sliding, sliding doors and windows, fence, pipe and ceiling material applications, through the new process is also widely used in automotive engine protection board, not only light weight, and good toughness, with just fine Nature, and sometimes also known as alloy steel.
Q:The main features of steel profiles
Plastic steel profile referred to as steel, the main chemical composition is PVC, it is also called PVC profiles. Is widely used as a new type of building materials, because of its physical properties such as rigidity, flexibility, corrosion resistance, excellent anti-aging properties, is usually used as copper, zinc, aluminum and other non-ferrous metals excellent substitutes.
Q:Plastic doors and windows and plastic windows do not like?
Glass fiber reinforced plastic (FRP) doors and windows 1) abroad to alkali-free glass fiber reinforced, the product surface finish is better, no need to deal with the system can be used directly to the window. Domestic self-developed glass fiber reinforced plastic doors and windows profiles generally with alkali glass fiber reinforced, the surface of the profile after grinding, available electrostatic powder coating, surface coating and other technical processes, access to a variety of colors or texture of the decorative effect. The following are the same as the " 2) Do not use high-alkali glass fiber made of profiles. The following are the same as the " 3) FRP doors and windows profiles have a high longitudinal strength, under normal circumstances, you can not enhance the steel. But the doors and windows size is too large or high wind pressure requirements, should be based on the use of requirements to determine the enhanced approach. The transverse strength of the profile is low. Fiberglass doors and windows frame for the assembly of the turret, the joints need to use sealant seal to prevent leakage of the gap.
Q:How many meters of a conch plastic steel profile
Plastic specifications of a lot of steel, do not know what you want to know? But each type of material has a standard weight of rice, their own to know, for example: Conch 60 two-track sliding box weight is 1.22kg, then 1000kg divided by 1.22 = 819 meters

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