Rod Ends Characteristics Usage And Matters Needing Attention
Plastic characteristics and applications
Plastic characteristics and applications
A. Tube. Pp
1. Now building installation, heating and water use of PPR rod ends are mostly. Its advantage is installed, convenient and economical environment, light weight, non-toxic, heat-resistant good health, corrosion resistance, thermal insulation good performance and long service life etc. Large diameter than the nominal diameter. If PPR32 is equivalent to DN25, PPR63 is divided have specific (diameter. DN25, DN32, DN40, and DN75, (DN90 DN63 automtic, DN110, j, phyletic tee, elbow pipe, rod ends clamps, bianjing and pipe, tube, bracket, hanger. Heat pipe, water pipe runs for TiaoGuan green, red hot water pipes for TiaoGuan. The valve is the PPR ball valve, cut-off valve, valve, gate valve, for TongXin for the PPR materials.
2. Pipe connections have welding, thermal and threaded connections, etc. The PPR hot work connected the most reliable, easy to operate, high strength, good air-tightness, interface. Piping adopts the hand-held welding socket connection. Before connecting pipeline, should remove dust and accessories and foreign bodies. When the machine and the red light, the stable after connecting pipe DN will melt < 50 for 1-2MM depth, DN < 110 melt depth for 2-4MM. Connections, insert the rotating pipe heat set inside, achieving depth. At the same time, the fitting is pushed to the rotating head, heating heating heating time immediately after the pipe and fittings of heating and heat from the head and remove, rapid rotation free, uniform force required to insert depth, make joint uniformly convex flange. Within the time stipulated in the heating, frit good fittings, but also can undertake adjustment is strictly prohibited. Pipe and rod ends heating, should prevent excessive heat, thin thickness. Pipe fittings in inside deformation. In the hot and correction, strictly intubation. The light is not prohibited by flame of pipes, baked. Will the pipe and pipe after heating vertical alignment push hard to light, prevent elbow bend. Connection, must hold pipe and pipe cooling time, keep enough to go back to a certain extent. When pp-r pipe and metal pipe connection should be adopted, with metal embedded parts of pp-r pipe fittings and transition, as the pp-r pipe socket USES hot metal fittings, or sanitary ware, hardware accessories, appropriate USES threaded connections in third ethylene ribbons as sealing filler. Pull up as placard, on the tap PPR pipe end tooth elbow inside the installation. Piping installation process, not overexert, lest injure screwed accessories, causing joint leakage. Also can use special pipes cut off: cut tube scissors chips should be adjusted to monitoring and cutting off, when rotating tube should be uniform strength, cut off after the application form, the fracture is the whole circle circle. Broken pipe, profile, vertical axis with pipe should be no burr.
3. Piping installation process, can be layered or for hydrostatic test. All piping work pressure and stress test: low pressure area for 0.4 Mpa pressure 0.6 Mpa, test, high working pressure with central area and 0.6 Mpa pressure calculation, test for 0.9 Mpa. In piping systems after installation, check again already installation of pipes, valves, gaskets, fasteners, all comply with the design and technical standard, the unfavorable and pipe fittings of the pressure, with temporary short tube, change all openings are closed, and from the lowest place, high deflated. To test the qualified pipeline, blow to wash and rinse until the dirt and various sweep clean record and test records, etc. Test for system pressure of work pressure, but not greater than 1.5 times of tubing allowable stress. When the water injection test should be slow, fill should be done after sealing inspection. Pressure appropriate USES hand pump voltage alowly and test pressure, stabilizing pressure drop is less than 0.05, 1h, then fell to work Mpa pressure stabilizing the 1.15 times 2 hours, inspection, don't ooze not leak does not exceed 0.03 Mpa pressure drop for qualified.
4. When installation, must pay attention to the handling and installation of pipes should avoid encounter sharp objects, in case of pipe. Piping installation process, should prevent paint organic pollutants and pipe, tube contact. After exposure to interrupt or installation, must be temporarily closed, lest the ingress. Water piping system before acceptance shall be carried out in the water, rinse. Rinse water velocity is greater than 2m/s, rinse, should not be left corner, every match bibcock of water should be open, the system should be established, low water cleaning time control of water drainage outlet in the wash with water until fairly. Drinking water system, the flush after 20-30mg/l application of chlorine water filling free pipe disinfected. Chlorine water pipe should be stranded 24h above. Piping after disinfection, reoccupy water flushing, and by the health administration department sampling inspection, the water with existing national standards of living water hygiene standards, and then after delivery. In 30 minutes, allowing two to boost pressure regulation test. Budget and feed tube to pay attention. This section is like drawing to carry PPR25 have the pipes. The factory must be used for different products, the products contained components manufacturers. Cause adhesive rickety or even the adhesive.
B. Hard PVC pipe
1. With the drainage pipe is UPVC. Due to its light weight, high strength, corrosion resistance, which is widely used in the pipe installation. Under normal circumstances, the average life-span of 30-50 years. UPVC pipes inside sleek, fluid friction small, overcoming the iron pipe for rust, scaling and influence of the flow. Diameter than the nominal diameter larger size. If PVC110 u-series DN100 is 6. PVC160 u-series, pipe is divided into three direct links, stone, inclined pipe, tube clamps, bianjing and pipe, tube bending, standing, hanger.
2. The connection with rubber drainage. Shake well before using must bonding. Piping and socket parts must be clean.
by: alina00123
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