Other products: rubber gaskets, high-temperature sealing strips, customized rubber valve seats, etc.

Materials involved: HNBR, NBR, fluororubber, silicone rubber, EPDM, CR, etc.

Standards applicable to rubber sealing products

GB/T 3452.1 Dimensions and tolerances of O-rings for hydraulic and pneumatic applications

DIN 3771/ISO 3601 O-rings for hydraulic systems

AS 568A, BS 1806

ISO 2230 Rubber products – Storage guidelines

ASTM D573 Standard test method for rubber deterioration in air oven

ASTM D395 Standard test methods for rubber property—compression set

ASTM D412 Standard test methods for vulcanized rubber and thermoplastic elastomers—tension

ASTM D2000 Standard classification system for rubber products in automotive applications

Performance Requirements for Explosion-Resistant O-Rings

O-ring explosion-resistance testing is commonly referred to by several names, such as AED (Anti-explosiondecompression) testing, ED (Explosivedecompression) testing, and RGD (Rapidgasdecompression) testing. However, they all describe the same subject: testing the explosion-resistance performance of O-rings.

The explosion-resistance performance of an O-ring refers to its ability to resist the penetration of high-pressure media.

Under normal circumstances, when exposed to high-pressure media, if the internal structure of the rubber O-ring is not sufficiently dense, the high-pressure medium will penetrate into the O-ring material after prolonged exposure and eventually reach equilibrium with the external pressure. In this situation, if the external pressure suddenly drops significantly, the high-pressure medium inside the O-ring will rapidly expand under the pressure differential and force its way out through the O-ring material, causing destructive damage to the O-ring. O-rings that fail to meet explosion-resistance testing requirements generally exhibit bursting, blistering, or even complete separation into two sections after testing. Such O-rings can seriously affect sealing performance during use, especially in valves exposed to high-temperature, high-pressure media for extended periods, potentially causing valve seal failure and serious consequences.

At present, there are three main standards for O-ring explosion-resistance testing:

The TotalGeneralSpecificationGSPVV test standard, the NorsokStandardM-710 test standard, and the JamesWalker test standard.