JB/T 8872-2002 Technical requirements for carbon graphite sealing rings for mechanical seals
Some standard content:
ICS21.140
Mechanical Industry Standard of the People's Republic of China
JB/T 8872-2002
Replaces 8B72-189S
Specification for carbon-graphite sealing ring for mechamical seals2002-07-16Published
2002-12-01Implementation
Published by the State Economic and Trade Commission of the People's Republic of China
Normative reference documents
Product classification
Test method selection
Inspection and measurement
7 Marking, packaging, remote collection and storage
Appendix A (Disposable material appendix) Chemical corrosion resistance of carbon-graphite sealing ring materials Record B (Informative appendix) Friction coefficient of graphite sealing ring and recommended matching materials (Appendix 100°C) Thermal performance parameter values of carbon graphite sealing rings (normally 200°C) Table 2 Classification of carbon graphite sealing ring materials.
Table 2 Physical and mechanical properties of various types of graphite sealing ring materials JE/T8872-2002
JB/T8872-2002
This standard is a revision of the technical conditions for carbon graphite sealing rings for electromechanical injection in JB/T-8872-1999. The main changes of this standard compared with B/T8872-1999 are as follows: The classification is modified according to the provisions of JB/T9580-1999, and the glass-impregnated, silver-impregnated magnet graphite series and silicified jade series specified in the original standard are added! The inspection items are adjusted from 4.1-~4.10 to 4.2~4.10. The three appendices of the original standard are controlled in terms of their nature and function. They are included in the supplementary requirements of this standard as informative appendices. In this revision, the tables A.1, B.1, and CI of the original appendices A, B, and C are appropriately adjusted and supplemented. This standard replaces 1999-1999.
Appendix A, Appendix B, and Appendix C of this standard are informative appendices. This standard is proposed by the China Machinery Industry Federation. This standard is under the jurisdiction of the Machinery Industry Standardization Technical Committee. Technical standard drafting unit: Lexin Electric Carbon Co., Ltd. The main drafters of this standard: Xu Xianghua, Lu Yuanl
1 Scope
Technical Specifications of Carbon Graphite Sealing Rings for Mechanical Seals JB/T8872—2002
This standard specifies the product classification, requirements, test methods, inspection rules, marking, packaging, transportation and storage of carbon graphite sealing rings for mechanical seals:
This standard applies to carbon graphite sealing rings for mechanical seals. 2 Normative References
The clauses in the underlined documents become the clauses of this standard through reference in this standard. For any dated referenced document, all subsequent revisions (excluding errata) or revised versions are not applicable to this standard. All parties involved in the study of whether to use the updated versions of these documents according to this standard are encouraged to use the updated versions of these documents. For any undated referenced document, the latest version shall apply to this standard. GB/T1184-1996 Tolerance of shape and position without indicating the tolerance value (ISO2768-2:1989) GB/T1800.3-1998 Limits and fits Part 3: Standard tolerance value table (ISO286-1:198B GB1958-1980 Shape and position tolerance test regulations GB/T2828-1987 Batch inspection schedule and sampling table (applicable to batch inspection of more than ten batches), GB/T3177-1007 Inspection of smooth workpiece dimensions JB2934-1993 Carbon materials and products for machinery JB/T4[27.1-1999=Machinery sealing and drawing properties JB/T81 33.1~17-1999 Test methods for chemical properties of electrolytic products JB/T9580-1999 Classification and numbering methods of electrolytic products 3 Product classification According to the provisions of JB/T9580, the classification of materials for mechanical seal rings is shown in 1.1 Classification of carbon steel sealing ring materials Classification name, production number Machine base magnetic M Series name, chemical number Micro-fee M Core material M2 Material shear adhesive Ring car seal Fu Pa tree device Phenolic resin Bamin alloy Aluminum alloy |tt||Alloy
Annular blood tree tracking
Taste with tree phase
Babbitt alloy
Aluminum alloy
.Copper alloy enterprise
Reduce the number
JBT8872-2002
Classification name, code
No reduction in the use of the symbol M
Special graphite type TwwW.bzxz.Net
4 Requirements
Table 11 continued:
Series name, North number
Electrochemical system M2
Resin has M3
Siliconized type T10
Expired or special agent
Gradually fat viscosity salt agent
All kinds of carbon stone whole case The physical and mechanical properties of sealing ring materials shall comply with the requirements of Table 2. 4.1
Table 2 Physical and mechanical properties of various carbon fiber sealing ring materials Series No.
Material ... 75
Special source
Diffusion reduction number
Opening air rate
The physical and mechanical properties of the specific model of carbon graphite sealing ring materials shall comply with JHT2934-1993 and relevant standards. 4.2
The maximum allowable surface roughness of the sealing end of the carbon graphite sealing ring is 0.4m.4.9
The flatness of the sealing surface of the carbon graphite sealing ring is greater than 0.0009rn4.4
When the carbon graphite sealing ring is connected to the auxiliary sealing surface, the parallelism of the end face to the auxiliary sealing surface shall be in accordance with GB/T1184-1996 for the line tolerance: 4.5
The carbon graphite sealing body and the auxiliary sealing surface shall be parallel to each other according to GB/T1184-1996 for the line tolerance: The maximum value of the surface roughness R of the contact part is 3.2um.4.6
The outer and inner hole size tolerances of the stationary ring and the rotating ring of the sealing ring and the auxiliary ring are h or R, 4.7
4.R is the outer circle and inner hole verticality of the stationary and rotating sealing end faces of the ring and the non-sealing net, according to G/11841996.47 grade tolerance,
JB/T8872-2002
4.9 The graphite sealing ring should be subjected to water pressure. The sealing ring test of the unbalanced and balanced mechanical seals is 1MPa plus 2.4MPa, and the test lasts for 1 day. No leakage is allowed. If there are special requirements, it shall be carried out according to the drawing. 4.10 The carbon mother sealing ring shall not have any wrinkles, oxidation, delamination, penetration points, and stains. 4.11 The chemical resistance, friction coefficient, recommended materials and thermal performance of carbon graphite sealing rings shall refer to Appendix A, Appendix B and Appendix C of the informative appendix respectively.
5 Test methods
5.1 The test methods for the hardness, flexural strength, compressive strength, bulk density and opening porosity of carbon graphite sealing ring materials shall be carried out in accordance with the standard of GB/T 3177-1997 and GB1958-1980.
52 The water pressure test of carbon graphite sealing ring materials shall be carried out on a special water pressure test device. 5.3 The dimensional tolerance and geometric tolerance of carbon graphite sealing rings shall be carried out in accordance with the provisions of GBT 3177-1997 and GB1958-1980 respectively. 5.4 The surface of the graphite sealing ring shall be checked by visual method. 6 Inspection regulations
6.1 Carbon graphite sealing rings shall be inspected by the quality inspection department before leaving the factory, and the inspection items shall be carried out in accordance with 4.2~4.10. 6.2 The sampling plan for the hardness, flexural strength, positive strength, hardness and open porosity of carbon graphite sealing ring materials shall comply with the provisions of GT2828. The sampling plan of the second modified stop band is adopted, the special inspection level is S-3, and the qualified quality level is AQL=6.5. 6.3 The sampling plan for the dimensional tolerance, shape and position tolerance and water pressure test of the magnetic seal ring shall comply with the provisions of GB/T2828, adopt the second normal sampling method, the special inspection level is S-3, and the qualified quality level is AQL-6.5. 6.4 The surface defects of carbon graphite sealing rings shall be 100% inspected. Marking, packaging, transportation and storage
7.1 The non-manufactured carbon graphite sealing rings shall be marked with the manufacturer's trademark or code, model and other signs. 2 The carbon graphite sealing rings shall be packaged to ensure that they will not be damaged during transportation and storage. 7.3 Products should be packed in tight boxes before leaving the factory, and the outside of the box should be marked with words such as "Handle with care" and "Prevent moisture from spreading". A packing list should be attached to the box, and the date should be marked on it:
a) Manufacturer name and trademark:
h) Product name and model specifications:
) Batch number:
) Quantity and weight:
e) Standard number:
f) Expiration date.
7.4 The product should be accompanied by a product certificate
7.5. The product is stored in a clean and dry warehouse, 3
JB/T8872-2002
Static acid and electrochemical
Juice: 10 is stable:
Appendix A
(Sealing material contamination)
Table A.1 Chemical corrosion resistance of carbon graphite sealing ring resin
Noble resin
is unstable! 0 is still stable.
Liquid metal, non-metal
System classification
Appendix B
(Informative Appendix)
Friction coefficient and recommended matching materials for carbon graphite sealing rings Table B.1
Proposed materials
High alloy point
Northern metal
No standard point
Commercial adjustment point
Non-metal
Barite alloy
Compiled alloy
Four-metal alloy
Lead and alloy
Recommended matching materials for the system improvement
Carbon total alloy, chain grid inquiry:
Energy reduction , ammonia, chemical altar, high-quality chain iron, Ma Huan stainless steel, 918Mn), Stellite, special alloy, anode, careful alloy, adjustment, no thanks, please thank you, Peng busy material, silicon carbide, high silicon, stainless steel, British material, porcelain, nitride, high-quality alloy, stone, inverse alloy, shoe, fossil port, iron smelting, ceramics, Note: the efficiency coefficient of carbon graphite paired with 9Cr1B, the friction resistance test is carried out on the MM-200 friction seat test shop. JB/T8872—2002
Maximum aging temperature
JA/TB872—2002
series code
, test temperature is 300℃.
b test temperature is 700℃. Appendix C (Informative Record) Thermal Properties of Carbon Sealing Rings (with Temperature -200°C) C.1 No Modified Material Rings Resin Phenolic Resin Wumin Alloy Shaoxing Alloy Copper Alloy Ring Plate Resin Ion Resin Anhydride Resin Physics Alloy Aluminum Alloy Alloy Copper Alloy Body Expansion Coefficient 3.8 -5.2 Thermal Conductivity Width + Ki Elasticity Value iX1ntMP
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