Safety and maintenance of pvc-u tube

PVC-U pipe is made of sanitary grade polyvinyl chloride (PVC) resin as the main raw material, adding appropriate amount of stabilizer, lubricant, filler, coloring agent, etc. by plastic extruder extrusion molding and injection molding machine injection molding, through cooling , curing, shaping, inspection, packaging and other processes to complete the production of pipes and fittings.

Performance characteristics:

· Excellent physical and chemical properties, chemical corrosion resistance, high impact strength, low fluid resistance, 30% higher flow rate than cast iron pipes of the same diameter, anti-aging, long service life, and service life of not less than 50 years. It is an ideal material for building water supply and drainage. .

· Lightweight and durable, easy to install, and powerfully speed up the progress of the project.

· Saving construction costs, which can greatly reduce construction costs compared to cast iron pipes of the same specification.

·The product is mainly white, beautiful in color, bright and smooth. Using our products, we can create a clean and relaxed sense of the times in the building environment.

Pvc-u tube application:

The pvc-u tube is essentially a vacuum blister film used for surface packaging of various types of panels. It is also known as decorative film and adhesive film, and is used in many industries such as building materials, packaging, and medicine. Among them, the building materials industry accounts for the largest proportion, accounting for 60%, followed by the packaging industry, and there are several other small-scale applications.

Construction and maintenance of pvc-u pipe:

The connection method of pvc-u pipe mainly includes three kinds of sealing rubber ring, bonding and flange connection. Pipes with a diameter of 100 mm or more generally use a rubber ring interface; pipes with a pipe diameter of less than 100 mm generally use bonded joints, and some use live joints. When the pipeline crosses the sewer or other pipelines, the metal pipe is generally used, and the plastic pipe and the metal pipe are flanged. The connection between the front and rear of the valve and the pipe is also flanged.

1. When the small-diameter pipe is solvent-bonded, the socket should be rounded to form a groove, and the fracture should be flat and vertical, so that the joint can be firmly bonded to avoid water leakage.

2. PVC pipe with a diameter of 100 mm or more is a rubber ring interface. Before installation, personnel must be arranged to chamfer the pipe socket and check whether the quality of the rubber ring is qualified. The socket, apron, etc. must be wiped clean during installation.

3. Pipe trench excavation installed in traditional pipelines only requires the pipe to be placed in the pipe trench and can be sealed. When the original soil layer is not loosened, the cushion can be pressed without pressing.

4, the general pvc-u pipe branch pipe can be used with tee or vertical water stop bolt split. During the construction, a saddle-shaped fitting can be added with a half-closed tee and clamped with a U-shaped bolt, so that the wall is thickened, and then the hole is directly drilled and then externally threaded plastic parts are taken out. Tests have shown that the pressure test acceptance after construction by this method can fully meet the requirements of the specification. In addition, in the position where the water flow in the pipe generates thrust, such as the elbow, the tee and the pipe end sealing plate, the thrust pier should be provided to withstand the thrust of the water flow.

5. As a new type of non-metallic pipe, pvc-u pipe can not detect its specific location by using existing metal pipe detection equipment. However, if a pipe is buried in the pipeline, it can be easily solved by laying a wire on the pipe.

The main points of the pvc-u tube during use:

(1) The pvc-u tube should not be exposed to the ketone chemical spirit, otherwise it will swell or dissolve.

(2) The pvc-u tube has a low heat distortion temperature, and its Vicat hardening point is only about 76 °C, so it can not be used under higher temperature conditions. The temperature of the normal requesting medium {TodayHot} must not exceed 45 °C. .

(3) The corresponding pvc-u pipe should be selected according to the pressure rating of the pipeline. There are a total of five pressure levels, namely 0 to 0.6 MP a, 0.6 to 0.8 MPa, 0.8 to 1.0 MPa, 1.0 to 1.25 MPa, and 1.25 to 1.60 MPa.

(4) When selecting the pipe diameter, it is necessary to analyze the factors such as pressure level, flow rate, flow rate, and astronomical environment. Generally, starting from the economic flow rate and separating others must always choose the pipe diameter. The economic flow rate of the pipeline is generally 1.0 to 1.8 m/s, and is generally about 1.5 m / s.

(5) Since the quality of pvc-u pipe fittings and valves indirectly affects the quality of the project, it is necessary to select good quality pipe fittings.

At present, the specifications of pipe fittings consumed by international manufacturers are not complete enough, especially those that can consume various specifications of pipe fittings. The specifications for pipes and pipe fittings are also not the same. Currently used pvc-u pipe fittings specifications include Japanese standard, British standard, ISO international standard, GB national standard and so on. We advocate the use of national standard products, so that it can be easily used in conjunction with other pipes. At present, there are vertical plastic water stop plugs for non-stop water opening and non-TS pipe joint pipe fittings (referred to as live receiving parts) for DN?

Upvc tube exposed:

(1) The upvc pipe is buried in the open, because it will not corrode, and it is not rust or rotten. Therefore, the service life is internationally recognized for more than 50 years. In practice, it can still exceed this number of years. It can be described as a kind of semi-eternal pipe.

(2) In the case of revealing piping, due to the difference in climate between different places, the difference between the strong and weak sunlight and the exposed sun exposure, the application of life will be different. The normal situation, the life of the piping for 10-15 years should be revealed. Be sure. (except for abnormal use).

(3) The life of the exposed pipe is shorter than that of the buried pipe, mainly to expose the pipe to direct sunlight, because the ultraviolet light of the sun will promote the deterioration of the material (the weather resistance of the upvc pipe is the best among various plastic pipes) Therefore, if the piping is to be replaced after 10-15 years of operation (for pressure pipes), the pipeline without pressure will have a longer life expectancy.

Construction rules:

1. Saw pipe and groove:

a. Saw pipe tools should use tools such as fine-tooth saws, cutters and pipe cutters. The incisions should be flat and perpendicular to the pipe body, and there should be no deformation at the section.

b. The medium plate can be folded into a 15°-30° groove at the socket. The thickness of the groove is 1/3-1/2 of the thickness of the pipe wall, and the length is generally not less than 3mm. The debris should be removed after the groove is completed. clean.

2. Depth of pipe end socket: When piping, the pipe and pipe fittings should be inserted once, and the mark should be marked on the surface. The depth of pipe insertion into the socket should not be less than the specified.

3, adhesive brushing: It is recommended to use our company's PVC special adhesive, use the small brush with the adhesive to pick up the adhesive, brush the joint surface of the pipe and the pipe, should be brushed in the axial direction, the action is quickly applied evenly, and painted Adhesive should be in an appropriate amount and should not be leaked or applied too thick. In the winter construction, it is important to pay attention to the application.

4. Connection of socket interface: After the adapter is painted with adhesive, the tube should be inserted into the socket immediately, so that the insertion depth of the tube end conforms to the marked mark, and the straightness and interface position of the socket interface are correct. It should be kept for 2-3 minutes to prevent the interface from slipping off. The error between the prefabricated pipe ends should be no more than 5mm.

5, the maintenance of the socket interface: after the socket interface is completed, the extruded adhesive should be wiped clean with cotton yarn or dry cloth cleaning agent. The interface is cured according to the properties of the adhesive and the climatic conditions. The curing time during construction in winter or rainy season should be extended appropriately.

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