Is there a standard specification for rubber rings in Shenzhen?

For example, our country should follow the national standard GB3452, Japanese standard JISB2401 compliance, the United States to comply with American Standard AS568 and DIN standard, some wire diameter is close to the standard in the tolerance range are interchangeable.
Rubber ring product characteristics:
EPDM, the main characteristics of three EPDM is its excellent resistance to oxidation, ozone resistant and anti erosion ability, aging resistance, electrical insulation and ozone resistant hair can highlight. Can be used for a long time at 120, and can be used for short or intermittent use at 150- 200
Wide use:
Mainly applied to the requirements of aging resistance, water resistance, corrosion resistance, electrical insulation in several areas, such as light for tire side / adhesive tape and car parts, heat resistant conveyor belt, wire and cable, anti-corrosion lining, gasket, building waterproof sheet, seal doors and windows, household appliances and accessories, ultra high voltage insulation material etc..
The O ring is the main products are divided into the national standard, Japanese standard, American Standard, European standard, and some non-standard special specifications.