What are national standard rubber joint performance criteria.
Product structure: rubber joint generally by the inner fabric reinforced protectionlayer, middle layer, middle layer and a rubber, end of rugged metal ring traveler, metal flange or parallel union.
2. Size: appearance quality with the method of visual decision, product specification size measured with vernier caliper and tape.
3. The pressure of work: rubber joint test pressure for five times the operating pressure, burst pressure for 3 times of working pressure.
4. Vacuum resistance: below the nominal diameter 300 mm, the pressure of work more than 1.6 Mpa rubber joint, resistance vacuum degree is not less than 100 kpa, and other specifications of the rubber to forehead the vacuum degree of the agreement by both parties of supply and demand.
5. The displacement performance:
6. Rubber joint with the physical and mechanical properties of the rubber
7. Rubber joint used for domestic and drinking water system safety evaluation: rubber joint used for the security of the drinking water system boxer
Rubber joint used for domestic and drinking water system, through the product after the water quality should comply with the GB/T5749 "drinking water health standards" and GB/T17219 the ShuPeiShui equipment and protective materials for domestic and drinking water safety evaluation standards of the relevant regulations and requirements.
8. The appearance of the rubber joint rubber parts quality requirements
9. Demand for metal flange form union peace: metal flange shall comply with the requirements of GB/T9119, flat union should comply with the requirements of GB/T3289.37.
10. When rubber joint end face strengthened with steel wire circle of requirements: when the rubber connector end face strengthened with steel wire circle, steel wire circle round shall be maintained and should be located in the same year in the same plane.