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GB/T 2941-2006 English PDF (GB 2941-1991, GB/T 2941-1991)

GB/T 2941-2006_English: PDF (GB/T2941-2006)
Standard IDContents [version]USDSTEP2[PDF] delivered inStandard Title (Description)StatusPDF
GB/T 2941-2006English145 Add to Cart 0--9 seconds. Auto-delivery Rubber -- General procedures for preparing and conditioning test pieces for physical test methods Valid GB/T 2941-2006
GB/T 2941-1991English190 Add to Cart 0--9 seconds. Auto-delivery Rubber-Standard temperatures, humidities and times for the conditioning environmental and testing of test pieces Obsolete GB/T 2941-1991


BASIC DATA
Standard ID GB/T 2941-2006 (GB/T2941-2006)
Description (Translated English) Rubber. General procedures for preparing and conditioning test pieces for physical test methods
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard G40
Classification of International Standard 83.060
Word Count Estimation 17,118
Date of Issue 2006-09-01
Date of Implementation 2007-02-01
Older Standard (superseded by this standard) GB/T 2941-1991; GB/T 5723-1993; GB/T 9865.1-1996; GB/T 9868-1988
Adopted Standard ISO 23529-2004, IDT
Drafting Organization Beijing Research and Design Institute of Rubber Industry
Administrative Organization National Rubber and rubber products for Standardization Technical Committee
Regulation (derived from) National Standard Approval Announcement 2006 No.11 (Total No.98)
Proposing organization China Petroleum and Chemical Industry Association
Issuing agency(ies) Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China; Standardization Administration of China
Summary This standard specifies the physical preparation for other standard rubber test specimen, measurement, markers, storage and regulation of the general program, as well as the preferred conditions for the testing process. Does not include specific conditions for specific tests or materials or simulate special climate and environment, nor does it include the special requirements for product testing. This standard also provides a rubber samples and products made ??from the time interval required for the test. These requirements increase the reproducibility of test results and reduce disputes between consumers and suppliers is necessary.


BASIC DATA
Standard ID GB/T 2941-1991 (GB/T2941-1991)
Description (Translated English) Rubber-Standard temperatures, humidities and times for the conditioning environmental and testing of test pieces
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard G40
Classification of International Standard 83.06
Word Count Estimation 3,392
Date of Issue 1991/4/25
Date of Implementation 1992/4/1
Older Standard (superseded by this standard) GB 2941-1982
Adopted Standard ISO 471-1983, MOD; ISO 1826-1981, MOD
Regulation (derived from) Announcement of Newly Approved National Standards No. 11, 2006 (No. 98 overall)


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). ......


GB/T 2941-1991 GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA GB/T 2941-91 Replacing GB/T 2941-82 Rubber - Standard temperatures, humidities and times for the conditioning environmental and testing of test pieces ISSUED ON: APRIL 25, 1991 IMPLEMENTED ON: APRIL 01, 1992 Issued by: State Bureau of Technical Supervision. Table of Contents 1 Subject content and scope of application ... 3 2 Definition ... 3 3 Laboratory standard temperature and humidity ... 3 4 Standard temperature and humidity tolerances ... 4 5 Time interval between testing and vulcanization ... 4 6 Conditioning ... 5 7 Tests ... 5 8 Test report ... 5 Additional information ... 6 Rubber - Standard temperatures, humidities and times for the conditioning environmental and testing of test pieces This standard equivalently adopts the international standard ISO 471-1983 "Rubber - Standard temperatures, humidities and times for the conditioning and testing of test pieces" and ISO 1826-1981 "Rubber, vulcanized - Time-interval between vulcanization and testing - Specification". 1 Subject content and scope of application This standard specifies the time intervals and standard temperature and humidity, for vulcanization of rubber specimens and products AND conditioning of the test environment. This standard applies to standard environmental conditioning and time intervals for specimens. This standard does not cover test and environmental conditioning conditions for special materials. The environmental conditioning and test conditions, which are required for each standard test method, shall be noted in the standard. 2 Definition Environmental conditioning - Before testing, the rubber specimen is directly exposed to standard temperature and humidity, for a specified period of time, to improve the repeatability of test results. 3 Laboratory standard temperature and humidity 3.1 Standard temperature: The standard temperature shall be 23 °C. In subtropical areas, the test can also be conducted, at a temperature of 27 °C; however, it can only be used as a temporary temperature for internal quality control. The temperature for the arbitration qualification test must be 23°C1). 3.2 Standard humidity: 1) ISO 471-1983 stipulates that the standard temperature is 23 °C or 27 °C. ......


GB/T 2941-1991 GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA GB/T 2941-91 Replacing GB/T 2941-82 Rubber - Standard temperatures, humidities and times for the conditioning environmental and testing of test pieces ISSUED ON: APRIL 25, 1991 IMPLEMENTED ON: APRIL 01, 1992 Issued by: State Bureau of Technical Supervision. Table of Contents 1 Subject content and scope of application ... 3 2 Definition ... 3 3 Laboratory standard temperature and humidity ... 3 4 Standard temperature and humidity tolerances ... 4 5 Time interval between testing and vulcanization ... 4 6 Conditioning ... 5 7 Tests ... 5 8 Test report ... 5 Additional information ... 6 Rubber - Standard temperatures, humidities and times for the conditioning environmental and testing of test pieces This standard equivalently adopts the international standard ISO 471-1983 "Rubber - Standard temperatures, humidities and times for the conditioning and testing of test pieces" and ISO 1826-1981 "Rubber, vulcanized - Time-interval between vulcanization and testing - Specification". 1 Subject content and scope of application This standard specifies the time intervals and standard temperature and humidity, for vulcanization of rubber specimens and products AND conditioning of the test environment. This standard applies to standard environmental conditioning and time intervals for specimens. This standard does not cover test and environmental conditioning conditions for special materials. The environmental conditioning and test conditions, which are required for each standard test method, shall be noted in the standard. 2 Definition Environmental conditioning - Before testing, the rubber specimen is directly exposed to standard temperature and humidity, for a specified period of time, to improve the repeatability of test results. 3 Laboratory standard temperature and humidity 3.1 Standard temperature: The standard temperature shall be 23 °C. In subtropical areas, the test can also be conducted, at a temperature of 27 °C; however, it can only be used as a temporary temperature for internal quality control. The temperature for the arbitration qualification test must be 23°C1). 3.2 Standard humidity: 1) ISO 471-1983 stipulates that the standard temperature is 23 °C or 27 °C. testing is 16 h. 5.2 For non-product testing, the maximum time interval between vulcanization and testing is four weeks. Comparative tests shall be performed at the same time intervals. 5.3 For the product testing, where possible, the time interval between testing and vulcanization shall not exceed three months. In other cases, the test shall be carried out within two months from the date of receipt by the purchaser. 6 Conditioning 6.1 When a certain temperature and humidity specified in 3.1 and 3.2 is used, the specimen shall be conditioned, under the standard temperature and humidity conditions for no less than 16 hours, before test. 6.2 When a certain temperature specified in Article 3.1 is used, the specimen shall be conditioned, at the standard temperature for no less than 3 hours, immediately before the test. Note: The conditioning of the internal quality control specimen temperature shall be no less than 30 min3). 6.3 When a certain temperature specified in Article 3.4 is used, place the specimen at this temperature before the test, to condition it for a long enough time, to balance the specimen with the ambient temperature, OR handle it according to the relevant provisions on the test materials and products. 6.4 During the conditioning of rubber specimens, the entire surface of each specimen shall be exposed to environmental conditioning as much as possible, meanwhile the specimens shall be protected from various stresses and exposure to direct sunlight. 7 Tests Unless otherwise specified, tests shall be carried out under standard conditions of temperature and humidity, to which the specimens are conditioned. Note: For the specimens that are conditioned at a certain temperature and humidity specified in Articles 3.1 and 3.2, the test can be carried out, in the environment specified in Article 3.3, provided that changes in temperature and humidity do not affect the test results. 8 Test report The test report includes the following contents: 3) ISO 471-1983 stipulates that the conditioning time before specimen test is 3 hours. ......

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