Pvc pipe end caps are made of polyvinyl chloride resin, stabilizers, lubricants, etc., and then extruded by hot pressing. It is the first plastic material to be developed and applied. PVC pipe has strong corrosion resistance, easy bonding, low price, and hard texture. However, due to the seepage of PVC monomer and additives, it is only suitable for water supply systems whose conveying temperature does not exceed 45°C.
The pvc pipe end cap is installed at both ends of the pvc pipe to seal the pipe fittings at the end of the pipe. Pvc pipe caps are divided into insert type and thread type.
We can also make pvc fittings and ppr fittings for you according to your drawings or requirements. We can engrave your logo on ppr pipe fittings.
Pay attention to when purchasing pvc pipe caps: (1) First look at the surface finish and whiteness. (2) Take the sample and drop it. The ones that are easy to break are usually high-calcium products. Of course, it should meet your requirements if the price is right. (3) Take the sample and step on the pipe with your foot to see if it can crack, or elongate at the break after cracking.
Plastic pipes represented by PPR pipes have been widely used in daily life, occupying more than 80% of modern water supply and drainage pipes. Take PPR pipes as an example. The products produced by PPR pipe manufacturers are generally 4 meters each. Correspondingly, PPR pipes are corrosion-resistant, hygienic, and have excellent materials, but they cannot be bent. It is inevitable to use pipe fittings in pipeline installation and use. Connection, the common connection method of PPR pipe fittings.
When PPR pipe manufacturers produce pipe fittings, each type of pipe fitting is used in conjunction with pipeline installation. Different pipe fittings are used for connection in different construction environments. Common PPR pipe fitting connections have the following types:
1. PPR pipe coupling
Because the length of PPR pipes is limited (the PPR pipes produced by conventional PPR pipe manufacturers are each 4 meters long), PPR pipe coupling needs to be used for connection at this time;
If we need to connect PPR pipes of different sizes, we need to use reducer coupling
2. PPR fitting Elbow
2. PPR fitting Elbow
The elbows include PPR 90° elbow, PPR 45° elbow, reducer elbow, union elbow, PPR FITTING FEMALE ELBOW(COPPER THREAD), PPR FITTING MALE ELBOW(COPPER THREAD), etc. When the pipeline waterway needs to be turned, then the elbow is sent Used
3. PPR fitting tee and cross
In the home and engineering decoration, we sometimes need to divert and change the direction of the waterway. At this time, we need to use TEE and CROSS connections, which can connect water pipes in different directions;
4. PPR FITTING FEMALE COUPLING(COPPER THREAD) AND PPR FITTING MALE COUPLING(COPPER THREAD)
ppr male coupling
When connecting with household faucets, water meters, and other water-using devices, due to the design of the water-using instrument, it is necessary to use the PPR FITTING FEMALE COUPLING and PPR FITTING MALE COUPLING for connection. Usually, most of the PPR FITTING FEMALE COUPLINGS are used in home decoration. It is necessary to remind everyone here that the price of wire connectors is usually more expensive, and we should try to reduce the number of connectors used;
5. PPR Ball valve and PPR STOP valve
Ball valves and shut-off valves are what we usually call water valves, which are used to activate and close the waterway. Ball valves are mostly used in home furnishings, and stop valves are mostly used in engineering and construction; in china, ball valves are used more in the south, and more stop valves are used in the north;
6. PPR over bend
The use of twisting is to use two cross but not connected water pipes, and its function is to facilitate the installation of disjoint water pipes on the same horizontal plane;
7. plug and end cap
The function of the plug is to block the temporarily unnecessary ports in the pipeline to play a sealing role, and it is removed when installing water faucets and other water instruments.
Conclusion: There are many ways to connect PPR pipe fittings, and they should be designed reasonably according to the requirements of the construction environment. At the same time, it is inevitable to avoid hot melting during connection. Pay attention to the hot-melt connection of PPR pipes and fittings to ensure the quality of the connection, prevent repeated construction, and waste manpower and material resources.
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Pvc is widely used in the pipe industry, and PVC pipes are also very popular in the market. There are also many types of PVC pipes that cause consumers to be unclear when they buy. The following is an introduction to the classification of PVC pipes.
The pvc tube material is divided by: PVC-U (unplasticized PVC), C-PVC (chlorinated PVC), PVC-O (molecular oriented PVC), and High Impact PVC (PVC-HI).
Besides sharing many of the same properties such as safety, durability, sustainability, and recyclability, each type of PVC has its own advantages for different applications.
UPVC, also known as hard PVC or PVCU, is composed of an amorphous thermoplastic resin made by the polymerization of vinyl chloride monomer and certain additives (such as stabilizers, lubricants, fillers, etc.). In addition to using additives, the method of blending with other resins is also used to make it have obvious practical value. These resins are CPVC, PE, ABS, EVA, MBS, and so on. UPVC has high melt viscosity and poor fluidity. Even if the injection pressure and melt temperature are increased, the fluidity will not change much. In addition, the molding temperature of the resin is very close to the thermal decomposition temperature, and the temperature range that can be molded is very narrow, making it a difficult-to-mold material.
As a new type of pipeline, CPVC pipe has excellent corrosion resistance. In recent years, it has been widely used in steel, metallurgy, petroleum, chemical, fertilizer, dye, pharmaceutical, electric power, environmental protection, and sewage treatment industries. It is a metal anticorrosive material The ideal substitute. The service temperature of CPVC pipes and fittings can reach 93-100℃, which is 30-40℃ higher than that of PVC. At the same time, it improves the chemical resistance and corrosion resistance of PVC. It can resist strong acid, strong alkali, salt, fatty acid salt, and oxidant. And halogen chemical corrosion.
As the PVC-O pipe is to stretch the originally formed PVC-U pipe axially and radially, the wall thickness of the pipe is relatively thin. Compared with the wall thickness of PVC-O and PVC-U, PVC-O water supply pipes can reduce the wall thickness by 35%-40% compared with PVC-U water supply pipes, which greatly saves materials and reduces costs.
PVC-HI stands for High Impact PVC. The PVC-HI grade is obtained by adding to PVC-U, an impact modifier that increases the resistance of the pipes to external blows.
1. Urban water supply. Due to the comprehensive disadvantages of safety, sanitation, and convenient construction, PE pipes have now become the best choice for urban water supply pipelines.
2. Natural gas, gas transportation. Due to the strong connection, good volatility, easy construction, and good corrosiveness of PE pipes, it becomes an ideal pipe for medium and high-pressure natural gas transportation.
3. PE pipe food and chemical industry. Because of its good and common anti-corrosion function, PE pipes can be used to transport or discharge various acid and salt salts, extend the life of the pipe, reduce costs, and have low maintenance costs.
4. Mineral sand and mud transportation. PE pipe not only has corrosion resistance but also has common wear resistance, which is 4 times that of steel pipes. It can be widely used in the fields of conveying ore, fly ash for power plants, and mud for river dredging.
5. PE pipes replace cement pipes, cast iron pipes, and steel pipes. Regarding the city’s original laying of existing cement pipes, cast iron pipes, etc. to stop the old pipe reorganization, large-scale excavation can be stopped, and PE pipes with a smaller diameter can be used to indirectly pull out the old pipes to stop the replacement. The project cost is low, and the construction time is Short, so that the cost is reduced, so it is particularly suitable for pipeline reorganization and transformation in urban areas.
6. Garden irrigation pipes. Every garden has a lot of green belts. Because PE pipes are economical and inexpensive, most of the irrigation pipes in these green belts are PE pipes.
7. PE pipe municipal non-excavation project. Due to the development of science and technology and the influence of some factors such as the living environment, in the construction and establishment of cities, non-excavation technology used to be common in all aspects of construction and establishment of every construction site. The PE pipe has good toughness and high price, making it a rare plastic pipe in non-excavation construction. In the current construction and establishment, PE pipes will lose better and more general use.
8. Pipes for sewage disposal. With the rapid economic development, more and more sewage is discharged from major industrial factories. Among plastic pipes, PE pipes have a large flow rate, and they are clearly superior to other plastic pipes at pipe joints and corners. In today’s society In many of the local sewage treatment plants, PE pipes are used to dispose of sewage.
9. PE pipe power company transmission line. Electricity is an indispensable part of our lives, and it also has certain risks. Therefore, when choosing power transmission lines, we must think about safety. Because PE pipes have very good insulation and good pressure resistance ability and tension Lift was once commonly used in the establishment of transmission lines.
1. Before installing the ppr valve, carefully check whether the model and specifications of the ppr valve used are consistent with the design. 2. According to the model of the ppr valve and the factory manual, check whether the valve can be used under the required conditions. 3. Pipe cutting. The pipe is cut by a special pipe. The bayonet of the pipe scissors should be adjusted to match the pipe diameter to be cut, and the pipe should be rotated and cut with even force. When the pipe is broken, the section should be perpendicular to the pipe axis. 4. Pipe connection. It is the most reliable way to connect PPR water pipes and pipe fittings by hot-melt, with good air tightness, convenient operation, and high interface strength. Before connecting, remove foreign objects on the pipe and accessories. The melting time and depth of pipes and fittings should meet the requirements. Do not rotate during thermal welding. When connecting the pipe fittings with wire, the raw material tape should be wrapped to ensure the seal. 5. The pipeline is fixed. In order to ensure that there is no resonance due to water pressure, all water pipes must be fixed with pipe clamps. For pipes with a distance between pipe clamps of 40 to 50 cm and an outer diameter of less than 25 mm, pipe clamps shall be installed at the corners and water meters and 10 cm at the end of the pipe. If it is a water pipe running a trough, the thickness of the mortar landfill is greater than 10 cm.
Precautions for PPR valve installation
1. The bolts on the flange and the bracket are indispensable, the threads should be intact and no looseness is allowed. 2. If the fastening nut on the handwheel is loose, tighten it in time to avoid losing the handwheel and nameplate or wearing the connection. If the handwheel is lost, don’t replace it with an adjustable wrench, it should be equipped in time. 3. The ruler on the valve should be accurate, complete, and clear. 4. There should be no dents or cracks in the insulation jacket. 5. The valve caps, lead seals, pneumatic accessories, etc. should be complete and intact. 6. For valves in an environment that are easily contaminated by dust, rain, snow, sand, and other dirt, the valve stem should be equipped with a protective cover. 7. The packing gland is best not to be skewed or without a pre-tightening gap. 8. Do not stand on, beat or support heavy objects on the valve in operation, especially non-metal valves, and cast iron valves.
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In recent years, PVC pipe materials are very popular in the decoration industry, and they are widely used. Different materials have different specifications and models, and PVC pipes are no exception. What are the problems that should be paid attention to in PVC pipe construction and maintenance?
1. When using solvent bonding for small diameter pipes, the spigot must be rounded to form a bevel, and the fracture must be a flat and vertical axis so that it can be bonded firmly and avoid water leakage.
2. Generally, PVC pipes with a diameter greater than or equal to 100 mm use rubber ring joints. Before installation, personnel must be arranged to chamfer the pipe socket, and the quality of the rubber ring must be checked. The sockets, rubber rings, etc. must be wiped clean during installation.
3. The trench excavation of traditional pipeline installation only requires that the pipeline can be put into the trench and can be sealed. When the original soil layer is not loosened, the cushion layer can not be pressurized and compacted.
4. General PVC pipe branch pipes can be split with a tee or vertical stopcock. During construction, a saddle-shaped fitting and half a two-in-one can be added and clamped with a U-shaped bolt to thicken the pipe wall, and then directly drill holes on it, and then use an externally threaded plastic part to connect it out. The test shows that the pressure test acceptance after construction with this method can fully meet the requirements of the specification. In addition, thrust piers should be set at the positions where the water flow in the pipe generates thrust, such as elbows, tees, and pipe end sealing plates to withstand the thrust of the water flow.
5. As a new type of non-metallic pipe, PVC pipe can not detect its specific location with existing metal pipe detection equipment. However, this problem can be easily solved if a wire is buried on the pipe during the pipeline burying facility.
Through the above introduction, do you know more about the construction and maintenance of PVC pipes? Hope to bring some help to your life
CHINA plastic pipes are developing rapidly, and their quality is constantly improving. Among them, polyethylene PE pipes are widely used in building water supply, building drainage, buried drainage pipes, building heating, gas transmission pipes, electrical and telecommunications protection sleeves, industrial pipes, agricultural pipes, etc. due to their unique advantages. It is mainly used in the fields of urban water supply, urban gas supply, and farmland irrigation.
1. PE pipes first remove the roughness caused by moisture. Only for PE new materials.
2. The roughness of PE pipes only occurs on a very thin layer on the surface, which is also a kind of melt fracture, but it is different from the usual melt fracture. The usual melt fracture is the unstable flow of the entire melt. The surface roughness only occurs in a very thin layer on the surface of the pipe. The roughness of the pipe is formed in the die section. When the surface of the PE pipe is smooth, the molecules on the surface of the melt need to reach a certain degree of relaxation before exiting the mold.
3. Physical explanation of the rough surface of PE pipe:
A. Roughness is caused by the friction between the melt and the mold surface and has nothing to do with the surface roughness of the mold (not considering scratches). This friction is caused by the adhesion between the melt and the metal surface of the mold.
B, PE pipe surface finish needs lubricant.
“High-density polyethylene with low viscosity can form a lubricant on the surface of the mold as the extrusion progresses. Because the molecular chains of low-viscosity polyethylene have relatively few entanglement points, as the extrusion progresses, under the action of the mold surface, part of the molecular chains will be separated from the melt and “hang” on the surface of the mold to form a lubricant, This kind of lubrication is dynamically balanced. For high-viscosity polyethylene, due to the strong entanglement between the molecular chains, the molecular chains are not easily separated from the melt, so effective lubrication cannot be formed, and the surface of the pipe will be very rough.
C, the surface of high-viscosity polyethylene is rough.
Take out a molecule from the surface of the melt as the test object. One end of this molecule adheres to the surface of the mold, and the other end is entangled with other molecules, so that force exists at both ends of this molecule. Due to the strong entanglement of high-viscosity polyethylene, the adhesion of the molecule to the mold surface is sliding, and the molecule is “straightened”. Since the molecule has been in a stretched state before exiting the mold, it cannot be bent in time after the exit mold, and only after the exit mold can it be bent. The result of the bending of the exit mold is the formation of pits on the surface of the pipe.
D, the friction between the melt and the die is also the cause of the die deposit.
The scope of application of PVC pipe fittings is very wide. No matter how the best water pipes, no matter how the best installation technology, without good maintenance, the service life of PVC can be greatly discounted. To extend the perfusion service life, you need to learn its maintenance methods.
1. Prevent the blockage of PVC pipe fittings
It is common for drain pipes to be clogged, but one of the reasons for the clogging is foreign matter stuck to a part of the water pipe. Blocked water pipes will not only bring problems to our lives, but the local pressure of the water pipes is too large, which will affect the life of the water pipes. In order to avoid clogging, we can add a branch to the drain to prevent large foreign objects from entering the water pipe.
2. Prevent pressure on PVC pipe fittings
The hardness of PVC continues to increase, but the external pressure is too large, and water leakage may occur. When installing water pipes, if you install water pipes on the top of the room as much as possible, you can not only prevent the water pipes from rupturing and leaking due to heavy pressure but also avoid the huge cost of slapping the ground to repair the water pipes after the water leaks.
3. PVC pipe fittings sunscreen to prevent breakage
Long-term exposure will not only lead to PVC aging and performance degradation but also because sunlight penetrates the pipe wall to provide conditions for a large number of microorganisms to multiply, resulting in moss on the water pipe, which affects the use. In cold weather, the plastic will become brittle, and once the pipe freezes, the water pipe will break.
To prevent long-term exposure of PVC or excessive cold, do not lay exposed water pipes, or put insulation materials in exposed places, and drain the water in the water pipes at night in winter.
Treatment measures after the burst of PVC pipe fittings?
1. The amount of water leakage after a water pipe burst is generally directly related to the water pressure in the pipe. Regardless of whether the water is dripping or gushing out, what you should do at this time is to immediately close the valve of the water supply pipe and report to the local property department for repair.
2, tie the damaged part of the water pipe with special tape for repairing the water pipe.
3. In addition, it is also possible to repair the cracks in the water pipe with glass fiber tape or ring air resin adhesive.
4. If the water pipe burst is serious, you can wrap the broken part of the water pipe with a towel, which can prevent the water from spraying around, or introduce the water into the placed bucket, so as not to cause huge waste. At the same time, the valve of the main water pipe in the household can be closed, and the tap water supply in the house can be completely intercepted.
5. If the cause of the pipe burst is that the pipe is too old, you should find a plumber for inspection and repair in time.
