This part of QC/T 666 specifies the technical requirements, test methods, inspection rules as well as marking, packaging, transportation and storage of rubber O-rings (hereinafter referred to as O-rings) for auto air-condition with use of refrigerant (HFC-134a) (hereinafter referred to as R134a).
This part is applicable to rubber O-rings for auto air-condition pipeline system and compressor system.
2 Normative references
The following documents contain provisions which, through reference in this part of GB/T 666, constitute provisions of this part. For dated references, subsequent amendments to (excluding correction to), or revisions of, any of these publications do not apply. However, parties to agreements based on this part are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. For undated references, the latest edition of the normative document referred to applies.
GB 3452.1 Fluid power systems - O-rings - Part 1: Inside diameters, cross-sections, tolerances and size identification code
GB/T 3452.2 Fluid power systems - O-rings - Part 2: Quality acceptance criteria
GB/T 528 Rubber, vulcanized or thermoplastic - Determination of tensile stress-strain properties
GB/T 531.1 Rubber, vulcanized or thermoplastic - Determination of indentation hardness - Part 1: Durometer method (Shore hardness)
GB/T 1682 Rubber, vulcanized - Determination of low-temperature brittleness - Single test piece method
GB/T 1690 Rubber, vulcanized or thermoplastic - Determination of the effect of liquids
GB/T 2941-2006 Rubber - General procedures for preparing and conditioning test pieces for physical test methods
GB/T 3512 Rubber, vulcanized or thermoplastic - Accelerated ageing and heat resistance tests - Air-oven method
GB/T 5721-1993 General rules of identification, packaging, transportation and storage for rubber sealing products
GB/T 6031 Rubber, vulcanized or thermoplastic - Determination of hardness (hardness between 10 IRHD and 100 IRHD)
GB/T 7759 Rubber, vulcanized or thermoplastic - Determination of compression set at ambient elevated or low temperatures
GB/T 7762 Rubber, vulcanized or thermoplastic - Resistance to ozone cracking - Static strain testing
3 Terms and definitions
For the purpose of this standard, the following terms and definitions apply.
3.1
mix
mixture of rubber in any form and other compounding agents
3.2
brittleness temperature
minimum temperature at which a certain amount of samples are not ruptured under the specified conditions
QC/T 666.1-2010 The following standards are cited：
