Specification for carbon-graphite sealing ring for mechanical seals
1 Scope
This standard specifies the product classification, requirements, test methods, inspection provisions, marking, packaging, transportation and storage of carbon-graphite sealing ring for mechanical seals.
This standard is applicable to the selection of carbon-graphite sealing ring materials and the design of sealing rings for mechanical seals.
2 Normative References
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced documents (including any amendments) applies.
GB/T 1184-1996 Genometrical tolerancing — Geometrical tolerances for features without individual tolerance indications
GB/T 1958 Geometrical product specifications(GPS) — Geometrical tolerance — Verification prescription
GB/T 2828.1 Sampling procedures for inspection by attributes — Part 1: Sampling schemes indexed by acceptance quality limit (AQL) for lot-by-lot inspection
GB/T 3177 Geometrical product specifications (GPS) — Inspection of plain workpiece sizes
JB/T 2934 Carbon material an carbon products for mechanical engineering
JB/T 8133.4 Test method for physical-chemical properties of electrical carbon product — Part 4: Shore hardness
JB/T 8133.7 Test methods for physical-chemical properties of electric carbon products — Part 7: Transverse strength
JB/T 8133.8 Test methods for physical-chemical properties of electric carbon products — Part 8: Compressive strength
JB/T 8133.14 Test methods for physical-chemical properties of electric carbon products — Part 14: Volume density
JB/T 8133.15 Test methods for physical-chemical properties of electric carbon products — Part 15: Porosity
JB/T 9580 Classification and type arrangement method of carbon-graphite products
3 Product classification
According to JB/T 9580, the classification of carbon-graphite sealing ring materials for mechanical seals is shown in Table 1 of this standard.
Foreword I
1 Scope
2 Normative References
3 Product classification
4 Requirements
5 Inspection methods
6 Inspection provisions
6.1 Inspection classification
6.2 Delivery inspection
6.3 Appraisal inspection
7 Marking, packaging, transportation and storage
Annex A (Informative) Chemical resistance of carbon-graphite sealing ring materials
Annex B (Informative) Carbon-graphite sealing ring friction coefficient and recommended matching material
Annex C (Informative) Thermal performance parameters of carbon-graphite sealing ring (normal temperature ~ 200°C)
Table 1 Classification of carbon-graphite sealing ring materials
Table 2 Physical and mechanical properties of various carbon-graphite sealing ring materials
Table 3 Flatness error of seal face 错误!未定义书签。
Table A.1 Chemical resistance of carbon-graphite sealing ring materials
Table B.1 Friction coefficients and recommended matching materials for carbon-graphite sealing rings
Table C.1 Thermal performance parameters of carbon-graphite sealing rings
