GB/T 2941-2006 PDF English
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Name of Chinese Standard | Status |
| GB/T 2941-2006 | English | 145 |
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Rubber -- General procedures for preparing and conditioning test pieces for physical test methods
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| GB/T 2941-1991 | English | 190 |
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Rubber-Standard temperatures, humidities and times for the conditioning environmental and testing of test pieces
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GB/T 2941-2006: PDF in English (GBT 2941-2006) GB/T 2941-2006
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 83.060
G 40
GB/T 2941-2006 / ISO 23529:2004
Replacing GB/T 2941-1991, GB/T 5723-1993, GB/T 9865.1-1996, GB/T 9868-1988
Rubber – General Procedures for Preparing and
Conditioning Test Pieces for Physical Test Methods
(ISO 23529:2004, IDT)
ISSUED ON: SEPTEMBER 01, 2006
IMPLEMENTED ON: FEBRUARY 01, 2007
Issued by: General Administration of Quality Supervision, Inspection and
Quarantine;
Standardization Administration of PRC.
Table of Contents
Foreword ... 3
1 Scope ... 5
2 Test Piece Confirmation and Record Keeping ... 5
3 Standard Laboratory Conditions ... 6
4 Storage of Sample and Test Pieces ... 6
5 Preparation of Test Pieces ... 7
6 Conditioning ... 12
7 Measurement of the Dimensions of Test Pieces ... 13
8 Conditions of Test ... 15
9 Test Chambers ... 16
10 Test Report ... 18
Appendix A (Informative) Maintenance of Cutters ... 19
Appendix B (Normative) Conditioning Time of Rubber Test Piece ... 21
Bibliography ... 25
Foreword
This Standard equivalently adopted ISO 23529:2004 Rubber – General Procedures
for Preparing and Conditioning Test Pieces for Physical Test Methods (English Version).
This Standard replaced the following standards such as GB/T 2941-1991 Standard
Temperature, Humidity and Time for Environmental Regulation and Testing of Rubber
Samples; GB/T 5723-1993 Rubber, Vulcanized or Thermoplastic－Determination of
Dimensions of Test Pieces and Products for Test Purposes; GB/T 9865.1-1996 Rubber,
Vulcanized or Thermoplastic - Preparation of Samples and Test Pieces - Part 1:
Physical Tests; and GB/T 9868-1988 Rubber - General Directions for Achieving
Elevated or Subnormal Temperatures for Test Purposes.
This Standard equivalently translated ISO 23529:2004.
For the benefit of use, this Standard also makes the following editorial changes:
a) Delete the foreword of the international standard;
b) Change “this International Standard” into “this Standard”;
c) Use decimal point “.” to replace the comma “,” serving as a decimal point;
d) Add NOTE to the test control conditions of the comparison test in 3.2 for the
purpose of meet the requirements of actual operation, and provide guidance for
reducing unnecessary disputes;
e) For the benefit of use, add “C-30-P-4-V indicates that the abrasive is black silicon
carbide, the particle size is 30, the hardness code is P, the abrasive tool
organization number is 4, and ceramic bond; C-60-P-4-V indicates that the
particle size is 60, the rest is the same as C-30-P-4-V” to the NOTE of 5.2.3.3.
f) Add an informative annex (Annex A) for the maintenance of the cutter; so that
benefit the user to use and maintain the cutter.
Basing on the ISO 23529:2004, this Standard revised the following 4 standards such
as GB/T 2941-1991, GB/T 5723-1993, GB/T 9865.1-1996, GB/T 9868-1988. This
Standard includes all the contents of the above 4 standards; its described technical
contents are the same as the scope covered by the original standards. Their major
technical differences are as follows:
--- Add the requirements for test piece confirmation and record keeping (Clause 2
of this Edition);
--- Revise the laboratory humidity control tolerance from the original ±5%, ±2% to
±5%, ±10% (4.2 of GB/T 2941-1991; 3.2 of this Edition);
--- Revise the temperature tolerance for testing outside the standard test
temperature; namely, from the original 100°C below ± 1°C, (101°C~200°C) ± 2°C,
201°C± 3°C to 0°C and below ± 2°C, 0°C above ~ 100°C (including 100°C) below
± 1°C, 100°C above ± 2°C (3.4 of GB/T 2941-1991; 8.2.2 of this Edition);
--- Delete the common measuring instruments in Annex A; and thickness gauge for
Method A in Annex B (Annexes A and B in GB/T 5723-1993);
--- Adjust the maintenance of the cutter into informative annex (6.2 of GB/T 9865.1-
1996; Annex A of this Edition);
--- Revise the requirements for test temperature control box from the original
specific requirements into the principle requirements (Clauses 3, 4, 5, 6 of GB/T
9868-1988; Clause 9 of this Edition).
This Standard’s Annex A is informative; while Annex B is normative.
This Standard was proposed by China Petroleum and Chemical Industry Federation.
This Standard shall be under the jurisdiction of Rubber Physics and Chemical Test
Method Subcommittee of National Technical Committee for Standardization of Rubber
and Rubber Products (SAC/TC 35/SC 2).
This Standard was entrusted to Rubber Physics and Chemical Test Method
Subcommittee of National Technical Committee for Standardization of Rubber and
Rubber Products to interpret.
Drafting organization of this Standard: Beijing Research & Design Institute of Rubber
Industry.
Chief drafting staffs of this Standard: Wu Jiangtao, Feng Chunyang, Ma Weide, and
Liu Yuhuan.
The historical editions replaced by this Standard are as follows:
--- GB 2941-1982, GB/T 2941-1991;
--- GB 5723-1985, GB/T 5723-1993;
--- GB 9865-1988, GB/T 9865.1-1996;
--- GB 9868-1988.
Rubber – General Procedures for Preparing and
Conditioning Test Pieces for Physical Test Methods
WARNING - Persons using this Standard should be familiar with normal
laboratory practice. This standard does not purport to address all of the safety
problems, if any, associated with its use. It is the responsibility of the user to
establish appropriate safety and health practices and to ensure compliance with
any national regulatory conditions.
1 Scope
This Standard specifies general procedures for the preparation, measurement,
marking, storage and conditioning of rubber test pieces for use in physical tests
specified in other Standards, and the preferred conditions to be used during the tests.
Special conditions applicable to a particular test or material or simulating a particular
climatic environment are not included, nor are special requirements for testing whole
products.
This Standard also specifies the requirements for the time-interval to be observed
between forming and testing of rubber test pieces and products. Such requirements
are necessary to obtain reproducible test results and to minimize disagreements
between customer and supplier.
2 Test Piece Confirmation and Record Keeping
Records shall be kept of the identity of each test piece so that it is identifiable with the
sample supplied and such that all the relevant details of preparation, storage,
conditioning and measurement are traceable to each individual test piece.
Each sample or test piece shall be individually identifiable by marking or segregation
at each stage of its preparation and testing. Where marking is used as the method of
identification, the markings shall be sufficiently durable to ensure that the test piece or
sample remains identifiable until discarded. Where grain effects may be significant, the
direction of the grain shall be identified on each sample or test piece.
The method of marking shall not affect the properties or the sample or test piece and
shall avoid significant surfaces, i.e. surfaces which are to be directly tested (as in e.g.
abrasion tests) or surfaces at which a fracture will terminate during the test (as in e.g.
tear or tensile tests).
......
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.
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