PVC-U pipes are made of sanitary polyvinyl chloride (PVC) resin as the main raw material, with appropriate amounts of stabilizers, lubricants, fillers, color enhancers, etc. added, and are extruded by a plastic extruder and injection molded by an injection molding machine. The production of pipes and fittings is completed through processes such as cooling, curing, shaping, inspection, and packaging.

Shandong SIFFO Plastic Technology Co., Ltd. is a company specializing in the research, development, production and sales of HDPE pipes, PVC pipes, SRTP (SRPE) wire mesh skeleton composite high-pressure composite pipes, pipe fittings and pipeline series products. It is located in Linyi City, Shandong Province, China, with a construction area of more than 150,000 square meters. It currently has two production bases in Shandong and Jiangsu. It has a complete R&D quality control and after-sales system, and can provide customers with high-quality products and technical after-sales services in a timely and efficient manner.

SIFFO always adheres to the enterprise spirit of "integrity, dedication, innovation and win-win", and pursues the business philosophy of "professional focus on quality and wholehearted service". With a scientific and rigorous attitude, strict quality standards, and high-quality, efficient and convenient service methods, it provides users with comprehensive and thoughtful services in all aspects.

There are three main ways to connect PVC drainage pipes: sealing rubber ring, bonding and flange connection.
1. PVC drainage pipes with a diameter greater than or equal to 100 mm generally use rubber ring joints;
2. PVC drainage pipes with a diameter less than 100 mm generally use bonding joints, and some use flexible joints;
3. When PVC drainage pipes cross sewers or other pipelines, metal pipes are generally used. At this time, the plastic pipe and the metal pipe are connected by flanges. Before and after the valve The connection with the pipeline is also flange connection.
Precautions for PVC drainage pipe installation
1. The length of PVC drainage pipe is determined layer by layer according to actual measurement and combined with the size of each connecting pipe fitting.
2. PVC drainage pipe sawing tools should be fine-toothed saws, cutters and pipe cutters. The fracture should be flat and there should be no deformation at the cross section.
3. The plug part of the PVC drainage pipe to be bonded can be filed into a 15o~30o groove with a medium-sized plate file. The groove length is generally not less than 3mm, and the groove thickness should be 1/3~1/2 of the pipe wall thickness. After the groove is completed, the debris should be cleaned.
4. After the socket joint of the PVC drainage pipe is connected, the extruded adhesive should be wiped clean with cotton yarn or dry cloth dipped in a little acetone or other cleaning agents. According to the performance of the adhesive and climatic conditions, it is left to stand until the interface is cured.
5. The curing time of PVC drainage pipes should be appropriately extended during winter construction.