JB/T 8872-2016_English: PDF (JB/T8872-2016)
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Specification for carbon-graphite sealing ring for mechanical seals
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JB/T 8872-2016
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| JB/T 8872-2002 | English | 140 |
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Specification for carbon-graphite sealing ring for mechanical seals
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JB/T 8872-2002
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| JB/T 8872-1999 | English | 359 |
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(Mechanical seal carbon graphite seal ring technical conditions)
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JB/T 8872-1999
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| Standard ID | JB/T 8872-2016 (JB/T8872-2016) | | Description (Translated English) | Specification for carbon-graphite sealing ring for mechanical seals | | Sector / Industry | Mechanical & Machinery Industry Standard (Recommended) | | Classification of Chinese Standard | J22 | | Classification of International Standard | 21.140 | | Word Count Estimation | 10,182 | | Date of Issue | 2016-01-15 | | Date of Implementation | 2016-06-01 | | Older Standard (superseded by this standard) | JB/T 8872-2002 | | Quoted Standard | GB/T 1184-1996; GB/T 1958; GB/T 2828.1; GB/T 3177; JB/T 2934; JB/T 8133.4; JB/T 8133.7; JB/T 8133.8; JB/T 8133.14; JB/T 8133.15; JB/T 9580 | | Drafting Organization | Wuxi Zhongqiang Electric Carbon Co., Ltd | | Administrative Organization | National Mechanical Seal Standardization Technical Committee | | Regulation (derived from) | ?Ministry of Industry and Information Technology Bulletin 2016 No.3 | | Summary | This standard specifies the product classification, requirements, inspection methods, inspection regulations, marking, packaging, transportation and storage of carbon graphite seal rings for mechanical seals. This standard applies to mechanical seals with carbon graphite seal ring material selection and sealing ring design. | | Standard ID | JB/T 8872-2002 (JB/T8872-2002) | | Description (Translated English) | Specification for carbon-graphite sealing ring for mechanical seals | | Sector / Industry | Mechanical & Machinery Industry Standard (Recommended) | | Classification of Chinese Standard | J22 | | Classification of International Standard | 21.140 | | Word Count Estimation | 10,121 | | Date of Issue | 2002-07-16 | | Date of Implementation | 2002-12-01 | | Older Standard (superseded by this standard) | JB/T 8872-1999 | | Quoted Standard | GB/T 1184-1996; GB/T 1800.3-1998; GB 1958-1980; GB/T 2828-1987; GB/T 3177-1997; JB/T 2934-1993; JB/T 4127.1-1999; JB/T 8133.1 ~ 17-1999; JB/T 9580-1999 | | Drafting Organization | East New Carbon Co., Ltd. | | Administrative Organization | Machinery Industry Standardization Technical Committee mechanical seal | | Regulation (derived from) | Ministry of Industry and Commerce Bulletin No. 3, 2016; Industry-Science (2010) No. 77; Industry Standard Announcement No. 2016 (No. 196) | | Summary | This standard specifies: mechanical seal with carbon graphite seal ring product classification, requirements, test methods, inspection rules, marking, packaging, transport and storage, etc. content. This standard applies to: mechanical seal with carbon graphite seal ring. | | Standard ID | JB/T 8872-1999 (JB/T8872-1999) | | Description (Translated English) | (Mechanical seal carbon graphite seal ring technical conditions) | | Sector / Industry | Mechanical & Machinery Industry Standard (Recommended) | | Classification of Chinese Standard | J22 | | Classification of International Standard | 21.140 | | Word Count Estimation | 9,952 | | Older Standard (superseded by this standard) | ZB J22017-1989 |
JB/T 8872-2016
MACHINERY INDUSTRY STANDARD OF
THE PEOPLE’S REPUBLIC OF CHINA
ICS 21.140
J 22
Record number: 53591-2016
Replacing JB/T 8872-2002
Specification for carbon-graphite sealing ring for
mechanical seals
ISSUED ON: JANUARY 15, 2016
IMPLEMENTED ON: JUNE 01, 2016
Issued by: Ministry of Industry and Information Technology of the PRC
Table of Contents
Foreword ... 4
1 Scope ... 5
2 Normative references ... 5
3 Product classification ... 6
4 Requirements ... 6
5 Inspection methods ... 8
6 Inspection provisions ... 9
6.1 Inspection classification ... 9
6.2 Exit-factory inspection ... 9
6.3 Appraisal inspection ... 9
7 Marking, packaging, transportation, and storage ... 10
Appendix A (Informative) Chemical corrosion resistance of carbon-graphite
sealing ring materials ... 11
Appendix B (Informative) Friction coefficient and recommended pairing
materials of carbon-graphite sealing ring ... 12
Appendix C (Informative) Thermal performance parameter values of carbon-
graphite sealing ring (normal temperature ~ 200°C) ... 13
Table 1 -- Material classification of carbon-graphite sealing ring ... 6
Table 2 -- Physical and mechanical properties of various carbon-graphite
sealing ring materials ... 7
Table 3 -- Planeness error of seal face ... 7
Table A.1 -- Chemical corrosion resistance of carbon-graphite sealing ring
materials ... 11
Table B.1 -- Friction coefficient and recommended pairing materials of
carbon-graphite sealing ring ... 12
Table C.1 -- Thermal performance parameter values of carbon-graphite
sealing ring ... 13
Foreword
This Standard is drafted in accordance with the rules given in GB/T 1.1-2009.
This Standard replaces JB/T 8872-2002 “Specification for carbon-graphite
sealing ring for mechanical seals”. As compared with JB/T 8872-2002, the main
technical changes of this Standard are as follows:
- Adjust the physical and mechanical property parameters of some carbon-
graphite sealing ring materials;
- Modify the hydraulic test method for the graphite ring;
- Modify the inspection provisions.
This Standard was proposed by China Machinery Industry Federation.
This Standard shall be under the jurisdiction of National Technical Committee
491 on Mechanical Seal of Standardization Administration of China (SAC/TC
491).
Drafting organizations of this Standard: Wuxi Zhongqiang Electrical Carbon Co.,
Ltd., Hefei General Machinery Research Institute, Fujian Minxuan Technology
Co., Ltd., Zhejiang Tianying Mechanical Seals Co., Ltd., Ningbo Vulcan
Mechanical Seal Manufacturing Co., Ltd.
Main drafters of this Standard: Wu Qiang, Tu Xianghua, Wu Guoping, Zhu Bin,
Zhao Jiaqian, Li Kun.
The previous editions of the standard replaced by this Standard were released
as follows:
- ZB J22 2017-1989;
- JB/T 8872-2002.
Specification for carbon-graphite sealing ring for
mechanical seals
1 Scope
This Standard specifies the product classification, requirements, inspection
methods, inspection provisions, marking, packaging, transportation, and
storage, etc. of carbon-graphite sealing ring for mechanical seals.
This Standard applies to the material selection and design of carbon-graphite
sealing ring for mechanical seals.
2 Normative references
The following documents are indispensable for the application of this document.
For the dated references, only the editions with the dates indicated are
applicable to this document. For the undated references, the latest edition
(including all the amendments) are applicable to this document.
GB/T 1184-1996 Geometrical tolerancing - Geometrical tolerance for
features without individual tolerance indications
GB/T 1958 Geometrical Product Specifications (GPS) - Geometrical
tolerance - Verification
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 and 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 Method for Physical-chemical Properties of Electrical
Carbon Product - Part 7: Transverse Strength
JB/T 8133.8 Test Method for Physical-chemical Properties of Electrical
Carbon Product - Part 8: Compressive Strength
4.5 The parallelism of the seal face of planar sealing ring to the end face which
the auxiliary sealing ring contacts, in accordance with GB/T 1184-1996, has
Grade 7 tolerance.
4.6 The surface roughness of the contact surface between the planar sealing
ring and the auxiliary sealing ring is not more than Ra 3.2 μm.
4.7 The size tolerances of the static ring and rotating ring of planar sealing ring
and of the outer circle and inner hole in contact with the auxiliary sealing ring
are h8 or H8.
4.8 The perpendicularity of the seal face of static ring and rotating ring of planar
sealing ring to the outer circle and inner hole in contact with the auxiliary sealing
ring, in accordance with GB/T 1184-1996, has Grade 7 tolerance.
4.9 The carbon-graphite sealing ring shall be tested for hydraulic pressure
(internal pressure). Sealing rings for non-balanced and balanced mechanical
seals shall have a test pressure of 0.8 MPa and 1.6 MPa respectively for 10
min and shall not leak. If there are special requirements, it shall be carried out
according to the drawings.
4.10 The carbon-graphite sealing ring is not allowed to have cracks, oxidation,
delamination, penetrating pitting, pores, impervious impregnation.
4.11 The chemical corrosion resistance, friction coefficient, recommended
pairing materials and thermal performance parameters of carbon-graphite
sealing rings are given in informative Appendix A, B, and C, respectively.
5 Inspection methods
5.1 The test methods of Shore hardness, transverse strength, compressive
strength, volume density, and open porosity of carbon-graphite sealing ring
material shall be in accordance with JB/T 8133.4, JB/T 8133.7, JB/T 8133.8,
JB/T 8133.14, and JB/T 8133.15.
5.2 The hydraulic inspection of carbon-graphite sealing ring material is carried
out on a dedicated hydraulic test device.
5.3 The size deviation and geometrical tolerance of carbon-graphite sealing ring
are respectively inspected according to the provisions of GB/T 3177 and GB/T
1958.
5.4 USE an intuitive method to inspect the surface defects of carbon-graphite
sealing ring.
6 Inspection provisions
6.1 Inspection classification
The inspection is classified into exit-factory inspection and appraisal inspection.
6.2 Exit-factory inspection
6.2.1 Inspection items
The inspection items are carried out according to 4.2~4.10.
6.2.2 Sampling method
The appearance quality is 100% inspected. The sampling schemes for the size
deviation, geometrical tolerance, and hydraulic test of carbon-graphite sealing
ring are all in accordance with the provisions of GB/T 2828.1. USE single
normal sampling scheme. The special inspection level is S-4. The acceptance
quality level AQL=4.0.
6.3 Appraisal inspection
6.3.1 Inspection timing
In one of the following cases, it shall carry out an appraisal inspection:
a) Before design is finalized and product is put into production;
b) There are major changes in product structure, materials, and processes;
c) Transfer plant production of products;
d) Required by the user;
e) Required by the national quality supervision department.
6.3.2 Inspection items
In addition to the inspection according to 6.2, according to the specified
requirements or when required by the client, the Shore hardness, transverse
strength, compressive strength, density, and open porosity of the material shall
also be tested.
6.3.3 Sampling method
At least 1 sample is taken for each lot of products for inspection.
......
JB/T 8872-2002
MACHINERY INDUSTRY STANDARD OF
THE PEOPLE’S REPUBLIC OF CHINA
ICS 21.140
J 22
Replacing JB/T 8872-1999
Specification for carbon-graphite sealing ring for
mechanical seals
ISSUED ON: JULY 16, 2002
IMPLEMENTED ON: DECEMBER 01, 2002
Issued by: State Economic and Trade Commission of the PRC
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative references ... 4
3 Product classification ... 5
4 Requirements ... 5
5 Test methods ... 7
6 Inspection rules ... 7
7 Marking, packaging, transportation, and storage ... 8
Appendix A (Informative) Chemical corrosion resistance of carbon-graphite
sealing ring materials ... 9
Appendix B (Informative) Friction coefficient and recommended pairing
materials of carbon-graphite sealing ring ... 10
Appendix C (Informative) Thermal performance parameter values of carbon-
graphite sealing ring (normal temperature ~ 200°C) ... 11
Table 1 -- Material classification of carbon-graphite sealing ring ... 5
Table 2 -- Physical and mechanical properties of various carbon-graphite
sealing ring materials ... 6
Specification for carbon-graphite sealing ring for
mechanical seals
1 Scope
This Standard specifies the product classification, requirements, test methods,
inspection rules, marking, packaging, transportation, and storage, etc. of
carbon-graphite sealing ring for mechanical seals.
This Standard applies to carbon-graphite sealing ring for mechanical seals.
2 Normative references
The following documents contain the provisions which, through reference in this
Standard, become the provisions of this Standard. For the dated references,
their subsequent amendments (excluding corrections) or revisions do not apply
to this Standard. However, the parties who enter into agreement based on this
Standard are encouraged to investigate whether the latest editions of these
documents are applicable. For undated reference documents, the latest
editions apply to this Standard.
GB/T 1184-1996 Geometrical tolerancing - Geometrical tolerance for
features without individual tolerance indications (eqv ISO 2768-2:1989)
GB/T 1800.3-1998 Limits and fits - Bases - Part 3: Numerical values tables
of STANDARD tolerances and fundamental deviations (eqv ISO 286-1:1988)
GB 1958-1980 Rules for inspection of form and position tolerances
GB/T 2828-1987 Sampling procedures and tables for lot-by-lot inspection by
attributes (Apply to inspection of successive lots or batches)
GB/T 3177-1997 Inspection of plain workpiece sizes
JB/T 2934-1993 Mechanical carbon materials and products
JB/T 4127.1-1999 Specification for mechanical seals
JB/T 8133.1~17-1999 Test method for physical-chemical properties of
electrical carbon product
JB/T 9580-1999 Classification and type arrangement method of carbon-
4.8 The perpendicularity of the seal face of static ring and rotating ring of
carbon-graphite sealing ring to the outer circle and inner hole in contact with
the auxiliary sealing ring, in accordance with GB/T 1184-1996, has Grade 7
tolerance.
4.9 The carbon-graphite sealing ring shall be tested for hydraulic pressure.
Sealing rings for non-balanced and balanced mechanical seals shall have a test
pressure of 1MPa and 2.4MPa for 10min and shall not leak. If there are special
requirements, it shall be carried out according to the drawings.
4.10 The carbon-graphite sealing ring is not allowed to have cracks, oxidation,
delamination, penetrating pitting, impervious impregnation.
4.11 The chemical corrosion resistance, friction coefficient, recommended
pairing materials and thermal performance parameters of carbon-graphite
sealing rings are given in informative Appendix A, B, and C, respectively.
5 Test methods
5.1 The test methods of Shore hardness, transverse strength, compressive
strength, volume density, and open porosity of carbon-graphite sealing ring
material shall be in accordance with JB/T 8133.
5.2 The hydraulic inspection of carbon-graphite sealing ring material is carried
out on a dedicated hydraulic test device.
5.3 The size tolerances and form and position tolerances of carbon-graphite
sealing ring are respectively carried out according to the provisions of GB/T
3177-1997 and GB 1958-1980.
5.4 USE an intuitive method to inspect the surface defects of carbon-graphite
sealing ring.
6 Inspection rules
6.1 The carbon-graphite sealing ring, before leaving the factory, shall be
inspected by the quality inspection department. The inspection items shall be
carried out in accordance with 4.2~4.10.
6.2 The sampling scheme of Shore hardness, transverse strength, compressive
strength, density, and open porosity of carbon-graphite sealing ring material is
in accordance with GB/T 2828. USE double normal sampling scheme. The
special inspection level is S-3. The acceptance quality level AQL=6.5.
6.3 The sampling scheme of size tolerances, form and position tolerances,
hydraulic test of carbon-graphite sealing ring material is in accordance with
GB/T 2828. USE single normal sampling scheme. The special inspection level
is S-3. The acceptance quality level AQL=6.5.
6.4 Surface defects of carbon-graphite sealing ring shall be 100% inspected.
7 Marking, packaging, transportation, and storage
7.1 The non-working surface of carbon-graphite sealing ring shall be indicated
with marks such as the manufacturer’s trademark or code, type.
7.2 The packaging of carbon-graphite sealing ring shall ensure that it will not
be damaged during transportation and storage.
7.3 The products, when leaving the factory, shall be packaged in a sturdy
packaging box. The words such as “Handle with care” and “Keep dry” shall be
marked on the outside of the box. A packing list shall be attached to the box
with the following:
a) Manufacturer’s name and trademark;
b) Product name and type specifications;
c) Lot number;
d) Quantity and weight;
e) Standard number;
f) Exit-factory date.
7.4 The product, when leaving the factory, shall be accompanied by a product
qualification certificate.
7.5 The product shall be stored in a clean and dry warehouse.
......
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