How much is the gas pipe per meter? Fully understand the installation specification and transformation of gas pipeline.

Gas pipes are pipes used to transport gas. The material of gas pipeline needs to have the characteristics of strong sealing and large molecular weight. The gas pipeline can be connected by electric welding, hot-melt docking and steel-plastic connection. Natural gas belongs to flammable and explosive gas. If the quality of gas pipeline is not up to standard, it will easily lead to safety accidents, casualties or related property losses, so the quality and installation of gas pipeline must pass the standard. What brand of gas pipe is good? What is the installation specification of gas pipeline? Is there a regulation for gas pipeline reconstruction? The encyclopedia of gas pipe knowledge of Maigu. com answers for you.

Brief introduction of gas pipe What is a gas pipe? Gas pipe is a special pipeline for transporting combustible gas, which has the characteristics of convenient installation and reliable connection, and can be installed and fixed with gas pipe bracket. The diameter of gas pipeline is generally DN 15. Theoretically, the service life of bellows is about 8- 10 years, and that of ordinary rubber hose is within 2-3 years. The opening size of the gas pipeline is 720×400 mm or 635× 350 mm. ..

How much is the gas pipe? The price of gas pipes made of different materials is different. Relatively speaking, ordinary rubber hose will be cheaper, the price is around 5 yuan -20 yuan per meter, but its service life is short. Pe gas pipes and 304 stainless steel bellows are relatively expensive, and the price of 1.5m is about RMB-100 in 60 yuan, but they have longer service life, corrosion resistance, aging resistance and higher strength. The length of the gas hose will not exceed 2 meters, which can reduce the gas storage in the hose, reduce the resistance of the intake pipe and be safer. Details >>

Classification of pressure grades of gas pipelines Article 6. 1.6 of the current Code for Design of Urban Gas in China classifies urban gas pipelines into seven grades according to the design pressure p (unit: MPa):

1, high-pressure gas pipeline a: pressure 2.5 2, high-pressure gas pipeline b: pressure 1.6 3, secondary high-pressure gas pipeline a: pressure 0.8 4, secondary high-pressure gas pipeline b: pressure 0.4 5, medium-pressure gas pipeline a: pressure 0.2 6 and medium-pressure gas pipeline b: pressure 0.065438. The advantages of stainless steel bellows are anti-aging, anti-shedding, high temperature resistance, corrosion resistance, rat bite prevention and long service life.

2.pvc gas hose PVC gas hose is generally divided into three layers, the innermost layer is the inner tube of PVC black rubber layer; In the middle is a steel wire explosion-proof net, which is used to hoop pvc inner pipe; The outermost layer is pvc protective layer, which plays the role of flame retardant and mouse bite prevention.

3.pe gas hose PE gas pipeline is made of polyethylene, which can resist the corrosion of various chemical media without anti-corrosion coating, and the service life of PE gas pipeline is long.

Gas pipeline installation specification for gas pipeline installation: The rated pressure of high-pressure gas pipeline and gas burner of gas equipment in user's room shall comply with the current national standard Code for Design of Town Gas (GB 50028-2006):

1. Materials such as pipes, fittings, fittings and valves used in indoor gas pipelines shall comply with the provisions of design documents, and the inspection before installation shall be carried out according to the current national standards. Unqualified materials shall not be used.

2. Before the installation of indoor gas pipeline, the superstructure should meet the requirements of pipeline construction and installation.

3, gas pipeline installation should be according to the design and construction drawing for pipeline prefabrication and installation.

4. For pipes, fittings and fittings used in gas pipelines, if the pipe diameter is less than or equal to 50, galvanized steel pipes or copper pipes should be adopted when there is no clear stipulation in the design documents; When the pipe diameter is greater than 50 or the service pressure exceeds 10kPa, it shall meet the standards.

5, gas pipeline construction, in order to avoid the pipeline weld towards the wall, the pipeline weld is not obvious place should be marked in advance.

6, buried in the wall of copper pipe or stainless steel corrugated pipe, should use a special excavator slot. The width of the irrigation ditch should be the outer diameter of the pipeline plus 20mm, and the depth should meet the requirement that the covering thickness should not be less than10 mm. It is strictly forbidden to dig trenches on load-bearing walls, columns and beams. Details >>

Gas pipeline installation steps 1, check the gas pipeline.

The selected gas pipeline depends on whether there are words dedicated to gas on the wall. The length of gas pipe should not exceed 2 meters, and PE gas pipe or stainless steel corrugated gas pipe is best used.

2. Determine the installation location

Generally, it should be installed in a well-ventilated kitchen, and flammable items should not be piled up around it. Indoor height should not be less than 2.2 meters.

3. Installation of desktop cookers

After opening the package, take off the dust cap, put on the special trachea and clamp it with a pipe clamp. Note that the length of the air inlet pipe used shall not exceed 1.5m, and the hose shall not touch the kitchen body or pass through the kitchen bottom.

4. Installation of embedded gas stove

When selecting embedded installation, holes must be made in strict accordance with the requirements of installation location and hole size in the manual, and a vent should be left and right in front of the cabinet; After opening the hole, connect the cooker with gas hose, clamp the hose with pipe clamp, and put the cooker away for use. Details >>

Installation process of gas pipe joint 1 Screw the nut on the gas pipe.

2. Put the copper half-moon card on the fourth corrugation of the gas pipe to expose three stainless steel corrugations.

3. Tighten the nut along the direction of the joint, and finally put the thickened washer into the nut, and the joint is installed.

What qualifications do you need for gas pipeline installation? 1. The installation unit shall have legal qualifications and obtain the business license of the administrative department for industry and commerce. When applying for an installation license, a group company shall designate an organization or branch company specifically engaged in installation work. If you apply for an installation license in the name of a branch company, you must obtain the authorization of the head office.

2, the installation unit shall be engaged in pressure pipeline installation in accordance with the relevant technical specifications for pressure pipeline safety and its corresponding design, installation and completion acceptance standards.

3. The installation unit shall ensure that the safety performance of the installed pressure pipeline meets the requirements of safety technical specifications for pressure pipelines.

4, engaged in different levels of gas construction requires different levels of certificates, such as city gas pipeline installation requires GB 1 safety production license or GB2 safety production license. In addition, the installer also needs to have qualified and effective electrician certificate and welder certificate and corresponding technical grade certificate.

Maintenance and replacement of gas pipelines Daily maintenance methods of gas pipelines 1. Regularly check the pipeline condition: the gas pipeline needs to be regularly checked for aging, cracking, damage and other phenomena, and the gas leakage prevention work needs to be done carefully.

2. Check regularly for air leakage: check whether the gas pipe leaks with soapy water. If bubbles are found, there is air leakage. Open the window for ventilation, don't turn on electrical appliances or use naked flames, and find the gas service department as soon as possible after closing the gas valve.

3. Don't place inflammable and explosive articles next to the gas pipeline: Don't place inflammable and explosive articles next to the gas pipeline, and try to avoid naked flames contacting the gas source and gas transmission pipeline to ensure safety.

4. Don't move the gas pipeline casually: moving, disassembling, modifying or burying the gas pipeline without authorization may easily cause safety accidents.

Anti-corrosion practice of gas pipeline 1, insulation layer anti-corrosion: insulation layer can separate the pipeline from the soil as electrolyte, increase the resistance between the pipeline and the soil, thus reducing the corrosion current and achieving the purpose of anti-corrosion.

2. Drainage and anti-corrosion: connect the pipeline with the return line of the electric railway with low resistance wires, so that stray current can directly return to the substation without passing through the soil, which can prevent corrosion.

3. Cathodic protection: A certain amount of DC current is given from the outside of the pipeline. Because the current on the water pipeline eliminates the uneven potential on the surface of the metal pipeline, it cannot generate corrosion current, thus achieving the purpose of protecting the metal from corrosion.

How often do you change the gas hose? The gas hose connecting the gas stove is usually a rubber hose. Because the gas itself is corrosive and the kitchen is in a high temperature and high humidity environment, the service life of the hose is two years. It is recommended to change it every two years.

How much is a meter for gas pipe reconstruction?

The cost of gas pipeline reconstruction includes material cost and labor cost. Gas pipelines include stainless steel bellows, PVC gas hoses, PE gas hoses and ordinary rubber hoses, among which ordinary rubber hoses are the cheapest, and the price is around 5 yuan -20 yuan per meter. The market price of stainless steel, PVC and PE gas hoses is about 1.5m 60 yuan-100 yuan. The quality of PVC and PE gas hoses will be better than that of ordinary hoses.

Application process for gas pipeline renovation 1. Application for renovation: If the owner feels that the gas pipeline at home is not beautiful enough or the installation is unreasonable, he can apply to the property or market development department for renovation of the gas pipeline. The gas company will organize personnel to conduct on-site investigation and sign the application form, and be responsible for coordinating the design, installation, ignition and other links.

2. Payment: Bring your ID card, real estate license or real estate lease contract, sign the gas renovation contract, and arrange the renovation project within 5 working days after paying the renovation fee.

3. Reconstruction construction: The gas company arranges relevant personnel to rebuild the gas pipeline. Generally, it is the materials needed by the gas company to arrange the reconstruction, and the owner only needs to pay the relevant fees.

4. Check the gas pipeline: the reformed gas pipeline needs to be ignited to see whether it can be used normally and whether there are potential safety hazards.

Matters needing attention in gas pipeline reconstruction 1. Relative distance of gas pipeline: When gas pipeline meets other pipelines during installation and reconstruction, the following requirements shall be met: the clear distance between horizontal parallel laying and vertical parallel laying shall not be less than 150mm, and the clear distance between cross laying shall not be less than 50mm..

2. The pipeline cannot be hidden in the wall: the gas pipeline cannot be installed in the wall like a cable, but must be installed outside the wall to facilitate problem detection and maintenance. And the adjacent wall surface cannot be a wall surface made of flammable materials such as wood.

3. The pipeline should be short but not long: In order to reduce the occurrence of accidents, the gas pipeline should be short and not long, and try not to cross the bedroom and living room. If it must be crossed, protective measures must be taken, such as putting a pipe sleeve outside the pipeline.

Frequently asked questions about gas pipes: Can gas pipes be moved? Gas pipelines can be modified, but unauthorized modification is prohibited. You must go to the gas company to modify it, but you need to pay a certain fee, including materials and labor costs. The relocation, relocation, modification and installation of indoor pipeline gas facilities need to apply to the gas company, pay the survey fee, conduct on-site survey and calculate the modification fee, conduct on-site construction and settle the total cost.

Can the gas pipeline be wrapped? Article 28 of China's "Regulations on Urban Gas Management" stipulates: "Indoor gas shortage and gas metering devices shall not be installed, modified or dismantled without authorization." Therefore, the gas pipeline that enters the house cannot be packaged.

How many meters is the buried depth of gas pipeline? Article 6.3 of Code for Design of Town Gas (GB 50028-2006) clearly stipulates that the minimum covering thickness of underground gas pipeline (from road surface to pipe top) shall meet the following requirements for outdoor gas pipeline (usually urban pipe network) with pressure not greater than 1.6MPa:

1, buried under the motorway, at least more than 0.9m.

2, buried in non-motor vehicle lanes (including sidewalks), should be at least more than 0.6m m.. ..

3, buried in places where motor vehicles can't reach, shall not be less than 0.3m. ..

4, buried under the paddy field, shall not be less than 0.8m m. ..

What is the safe distance of gas pipeline? 1, the safe distance of underground gas pipeline.

The safe distance between underground gas pipelines is related to the types of adjacent buildings and the pressure of gas pipelines: the vertical clear distance between underground gas pipelines and structures or adjacent pipelines should not be less than 0. 15m, the vertical clear distance between underground gas pipelines and structures or adjacent pipelines should not be less than 1.2m, the horizontal clear distance between underground gas pipelines and buildings, structures or adjacent pipelines should not be less than 0.5m, and the distance between underground gas pipelines and the toe of railway subgrade should not be less than 5m.

2. Safe distance of indoor gas pipeline

According to the indoor gas pipeline installation specification: after the gas meter is installed, the clear distance between the decorative surface of the wall and the back of the gas meter must be greater than 1cm, there should be no wires and electrical equipment around the gas meter 10cm, and the horizontal distance between the cooker and the gas meter and gas pipeline should not be less than 30cm. The distance between the stove and water heater and the gas pipeline and switch should be more than 30 cm and less than 2 m, subject to not baking the rubber hose. Details >>

What should I do if the gas pipeline joint leaks? 1. Turn off the gas appliance switch, plug valve and ball valve at the first time; Do not operate electric appliances such as electric lights, electric fans, exhaust fans, range hoods, air conditioners, switches, wired wireless phones, doorbells, refrigerators, etc. To avoid explosion caused by tiny sparks caused by opening or closing.

2, immediately evacuate the crowd, open the doors and windows, let the air circulation, so that the gas.

3. Call the police after leaving the gas leakage site.

4. If there is gas leakage in the pressure regulating box, pressure regulating cabinet and underground gas pipeline, you should immediately turn off the gas appliances, plug valves and ball valves at home, cut off the gas source, put out the fire and leave the dangerous area in time.

Can gas pipes be used as water pipes? number

Although gas pipes require higher oil and acid resistance than water pipes, they are not as good as water pipes in other aspects, especially pipeline pressure. General household gas pipelines are basically low-pressure pipelines, and the pressure is lower than 0.0 1MPa, generally 2-3KPa. However, in order to achieve normal water supply with more than six floors, the water pressure of the general urban water supply network should reach at least 0.3MPa.

Gas pipe brand gas pipe is mainly used to transport domestic natural gas, which requires good air tightness, high safety and high requirements for production technology and technology. When buying gas pipes, be sure to identify them carefully. Although the production and listing of gas pipelines have been inspected, it is inevitable that there will be fish escaping from the net. What brand of gas pipe is good? Let's take a look with Buyou. Bian Xiao!

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