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:What belongs to plastic profiles
Plastic Profile A: Impact modifier Plastic profiles, such as without impact modifier, plastic profiles will be very brittle, slightly collision, easy to break. Plastic profiles used in the production of anti-impact agent modifier mainly by the following three categories: chlorinated polyethylene, polyacrylates, ethylene - vinyl acetate copolymer. Plastic profile additive two: heat stabilizer Plastic profile is a thermosensitive plastic, so in the production and processing of plastic profiles, heat stabilizer is essential. The metal salt in the heat stabilizer absorbs the HCL from the PVC, so it can delay the decomposition rate of the plastic and prolong the decomposition time. The most commonly used in the production of plastic profiles is the compound lead salt, which has high thermal stability and low cost. Plastic profile additives three: lubricant The main role of the lubricant is to reduce the polymer and processing equipment and polymer molecules between the internal friction between the friction caused by excessive heat caused by resin degradation, improve the efficiency of heat stabilizer.
Q:The state of high-rise residential building doors and windows materials are not allowed to use steel profiles are expressly provided?
The state of high-rise residential building doors and windows materials are not allowed to use steel profiles should be allowed. We are a lot of these are more than 20 layers of plastic steel `` also used.
Q:How plastic embossed profiles are made
Preloading To improve the quality of the product and improve the molding efficiency, the powder or fibrous molding compound is pre-pressed into a certain shape.
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:Steel windows and aluminum windows compare which is more expensive
Air tightness: Plastic window due to the box, fan components are welded, so the air tightness should be slightly better than the spiral of the aluminum alloy window, but the aluminum window profile height accuracy, box, fan with more closely, so the two are still in a Level level. 3, the insulation performance: aluminum window insulation performance as plastic window is good, but the ratio of the two window heat transfer ratio is only 1.36 times (single window) and 1.44 times (single frame double glass).
Q:What is the quality of plastic steel profiles in the end?
The price is relatively high, the quality is also very general above, especially color materials, color one or two years on the fade, and there will be a small part of the broken material problems, the current sell in the southern city a little better. But the supply cycle time is too long, completely delay the duration. And are and business people to communicate, do not see the manufacturers, so afraid to get fake.
Q:How to identify the installation of plastic or plastic
Plastic steel because there are iron, so use the magnet to identify. Another: steel easy to change line, now mostly switch to color steel or better.
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:Bathroom plastic door with what material to do
The plastic material of the bathroom is PVC   Plastic doors and windows (Plastic doors and windows), that is made of U-PVC plastic profiles made of doors and windows. Plastic doors and windows with wind, water, insulation and other good features.   According to the material can be divided into PVC plastic doors and windows and glass fiber reinforced plastic (FRP) doors and windows.

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