What is PVC-U drain pipe? PVC-U drain pipe is made from sanitary-grade polyvinyl chloride (PVC) resin, with appropriate amounts of stabilizers, lubricants, fillers, and color enhancers added. It is extruded and molded using a plastic extruder and then injection molded using an injection molding machine. The pipes and fittings are then produced through cooling, curing, shaping, inspection, and packaging. They offer excellent physical and chemical properties, chemical resistance, high impact strength, and low fluid resistance. They increase flow by 30% compared to cast iron pipes of the same diameter, are resistant to aging, and have a long service life of at least 50 years, making them an ideal material for building water supply and drainage.
PVC-U Drain Pipe Product Features
PVC-U drain pipe is a mature drainage pipe product that has been widely used both domestically and internationally. It offers the unmatched longevity and corrosion resistance of cast iron pipes. Furthermore, it is lightweight, easy to transport, install, and connect, making it a breeze. It is widely used in civil construction, drainage, chemical drainage, and rainwater management. PVC-U drainage pipes and fittings comply with the standards of GB/T5836.1-2006 and GB/T5836.2-2006.
PVC-U drainage pipes are the most widely used plastic pipes in water supply and drainage projects. Drainage pipe installation generally relies on the slope of the pipe to achieve optimal flow. Because the inner wall of PVC-U drainage pipes is very smooth, with a roughness coefficient of 0.009 (compared to 0.015 for cast iron), PVC drainage pipes have a much higher flow rate than metal pipes of the same inner diameter. Furthermore, they resist scale buildup over long-term use, ensuring consistent flow rate fluctuations. Combined with their excellent acid, alkali, and corrosion resistance, PVC drainage pipes are one of the most reliable pipe materials for sewer pipelines.
Features of PVC-U Drainage Pipe
1. Strong corrosion resistance, unaffected by corrosive soils and various drinking water sources;
2. Smooth inner surface, lower friction resistance than conventional materials;
3. Pipes and fittings will never rust, preventing internal corrosion and shrinkage;
4. Building exteriors will never be stained by rust, ensuring the building's value is preserved;
5. A wide variety of pipe fittings are available to suit various design and installation requirements;
6. Easy installation, requiring no regular maintenance;
7. Weighing only one-fifth of cast iron pipe, easy to transport and handle;
8. Adhesive bonding is simple, quick, and cost-effective;
9. Tasteless, odorless, and non-toxic;
10. Resistant to a wide range of chemicals, including strong acids and alkalis;
11. Impervious to bacteria;
12. Termite-resistant and weather-resistant;
13. Lower cost than conventional materials;
14. Lifespan of over 50 years under normal use.
PVC-U Drain Pipe Connection Steps
1. Pipe socket-and-spigot joints should strictly follow the following procedures:
① Clean the pipe spigot and fitting socket before bonding.
② Measure the socket depth and mark the pipe end.
③ Apply adhesive, first to the spigot and then to the socket, ensuring an even and appropriate coating.
④ Align the pipe and insert it into the marked area, rotating it 1/4 turn.
⑤ Wipe off any remaining adhesive from the spigot.
⑥ Allow the bonded pipe to stand until the joint solidifies.
2. Safe use of adhesives requires adherence to the following guidelines:
① Adhesive and detergent should be used immediately upon opening. Non-operating personnel are prohibited from handling them.
② Open flames are prohibited at the bonding point, and ventilation is essential.
③ Do not apply adhesive below -10°C, and do not heat the bonding point.
④ Applicators should wear gloves. If the adhesive gets into the eyes by mistake, rinse immediately with plenty of water and seek medical treatment.
PVC-U Drain Pipe Installation Method
1. Pipe Cutting and Beveling:
2. The pipe cutting length should be determined layer by layer based on actual measurements and the dimensions of each connecting pipe fitting. Pipe cutting tools should include fine-tooth saws, cutters, and pipe cutters. The cut should be smooth and free of any deformation. The socket to be bonded can be filed with a medium-sized plate file to a 15° to 30° bevel. The bevel length should generally be no less than 3mm, and the bevel thickness should be 1/3 to 1/2 the pipe wall thickness. After beveling, remove any debris.
3. Socket and Spigot Joint Protection:
4. After connecting the socket and spigot joint, remove any extruded adhesive with cotton yarn or a dry cloth dampened with a little acetone.
5. Clean with a cleanser. Allow the joint to cure, depending on the adhesive's properties and weather conditions.
6. The curing time should be extended appropriately during winter construction.