Many users may have such questions: Is the sealing ring of a press - fitted stainless steel water pipe reliable? Will it lose its elasticity after aging and cause water leakage in the pipe? Is the material safe? Will it release harmful substances? Today, let's learn about the relevant knowledge of sealing materials!

Connection Principle and the Role of Sealing Materials

The ring - compression and press - fitting connections utilize the effective rigidity of the material itself to provide internal support for the pipe wall. A tool (also called a mold) is used to press the pipe fittings and the pipe, and sealing materials are employed for sealing. The service life of press - fitted pipes is generally determined by the service life of the sealing materials.

International Sealing Rules and the Compression Ratio

The internationally recognized sealing rule is to use the compression ratio principle of materials for sealing. The compression ratio of press - fitted pipe fittings generally ranges between 20% and 30%. The "line" seal is the most basic principle of an O - ring seal, which is much more reliable than the "surface" seal. The standard test for measuring the compression ratio of sealing materials is the water compression set test in the national standard GB/T19228.3 (70 days, 110°C, with a compression loss of less than 30%). The O - ring seal is an internationally recognized sealing material with excellent compression ratio.

Selection of Sealing Materials Internationally

It is understood that the selection of sealing materials internationally generally includes chlorinated butyl rubber and ethylene - propylene - diene monomer (EPDM). These two materials not only meet hygiene standards but also have superior elastic compression performance, and their strength can meet the requirements of the GB/T19228.3 standard. During the use of water pipes, water pressure and vibration place high demands on the tensile strength of the sealing materials. The fracture of the sealing material is one of the main factors causing water leakage in water pipes.

The Application of O - ring Seals in the Connection of American - style Double - press - fitted Thin - walled Stainless Steel Pipes

In the connection of American - style double - press - fitted thin - walled stainless steel pipes, a hydraulic clamp is used for compression. The end of the pipe fitting undergoes concentric contraction to achieve a sealing effect. The shape of the pipe and pipe fitting at the press - fitting position changes into a hexagon, which enhances the anti - pull - out ability. The compression ratio principle of the O - ring seal is adopted. After the O - ring seal in the U - shaped groove is compressed, its long - term elasticity is exerted to achieve the purpose of sealing.

E-mail:
sdcntgy@163.com

Tel:
+86-15610709828

Address:
Anzhan Jian'an Manufacturing Industrial Park, Feicheng City, Shandong Province, China