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GB/T 1690-2006 PDF in English


GB/T 1690-2006 (GB/T1690-2006, GBT 1690-2006, GBT1690-2006)
Standard IDContents [version]USDSTEP2[PDF] delivered inName of Chinese StandardStatus
GB/T 1690-2006English160 Add to Cart 0-9 seconds. Auto-delivery. Liquid test methods vulcanized rubber or thermoplastic rubber resistance Obsolete
GB/T 1690-2010English85 Add to Cart 0-9 seconds. Auto-delivery. Rubber, vulcanized or thermoplastic -- Determination of the effect of liquids Valid

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GB/T 1690-2006: PDF in English (GBT 1690-2006)

GB/T 1690-2006
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 83.060
G 40
Replacing GB/T 1690-1992
Rubber, vulcanized or thermoplastic –
Determination of the effect of liquids
(ISO 1817.2005, Rubber, vulcanized –
Determination of the effect of liquids, MOD)
ISSUED ON. SEPTEMBER 1, 2006
IMPLEMENTED ON. JANUARY 01, 2007
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine of the People’s Republic of China;
Standardization Administration of the People’s Republic of
China.
Table of Contents
Foreword ... 3
Introduction ... 5
1 Scope ... 6
2 Normative references ... 6
3 Test device ... 7
4 Test liquids ... 9
5 Test pieces ... 9
6 Immersion in liquid ... 11
7 Procedures ... 11
8 Test report ... 18
Appendix A (Normative) Reference liquid ... 19
Foreword
This Standard modifies and adopts ISO 1817.2005 “Rubber, vulcanized -
Determination of the effects of liquids” (English version).
This Standard replaces GB/T 1690-1992 “Rubber, vulcanized - Determination of the
effect of liquids”.
The technical differences between this Standard and ISO 1817.2005 AND their causes
are as follows.
- CHANGE the standard name into “Rubber, vulcanized or thermoplastic -
Determination of the effect of liquids”, because the standard scope had included
the thermoplastic rubber.
- The test mass changes, volume changes and test piece size requirements vary.
In this Standard, it specifies that the test piece size is 25 mm x 50 mm according
to ASTM 471. However, in ISO 1817.2005, it specifies that the test piece is 1 cm3
~ 3 cm3 (see 5.2). This is due to the wide range of ISO standards, which is not
favorable to unify standard or data comparison.
- DELETE the descriptions on the reasons for specifying the standard simulation
liquid from the Appendix A.1 (see Appendix A), because the provisions in Table
A.1 are clear.
For ease of use, this Standard also made the following editorial modifications.
a) MODIFY “this International Standard” INTO “this Standard”;
b) DELETE the foreword of the international standard.
As compared with GB/T 1690-1992, the main technical differences of this Standard
are as follows.
- MODIFY the standard name;
- ADD the foreword and the introduction;
- ADD Clause 4 “Test liquids” (Clause 4 of this version);
- REPLACE the test piece used for the measurement of volume change and mass
change of 25 mm x 25 mm WITH the test piece of 25 mm x 50 mm (7.2.1 of 1992
version; 5.2 of this version);
- ADD the concept of maximum absorption of liquids (6.2 of this version);
- DELETE parts of test duration for selection (Clause 6 of 1992 version; 6.2 of this
version);
- REPLACE 1#, 2# and 3# standard oils WITH ASTM No.1 IRM902 and IRM 903
standard oils (see Appendix A);
- DELETE the requirement of placing the test piece of volatile test liquids in the petri
dish for weighing (7.3.3.1 of 1992 version; 7.1 of this version);
- REPLACE “ALLOW the test piece stand for 30 min after high-temperature
immersion test, CLEAN the test piece, CONDITION it at standard laboratory
temperature for 30 min in the petri dish for weighing” of the original standard WITH
“CONDITION it at standard laboratory temperature for 30 min or otherwise quickly
TRANSFER the test piece into a prepared new test liquid at this temperature and
ALLOW it to stand for a period of 10 min to 30 min for weighing.” (7.3.3 of 1992
version; 7.1 of this version);
- ADD the description of air influence (7.1 of this version);
- ADD other wiping fabrics other than filters (7.1, 7.3 and 7.8 of this version).
Appendix A of this Standard is normative.
This Standard was proposed by China Petroleum and Chemical Industry Association.
This Standard is under the jurisdiction of Sub-committee on Physical and Chemical
Test Method of National Committee on Rubber and Rubber Products of
Standardization Administration of China (SAC/TC 35/SC 2).
Sub-committee on Physical and Chemical Test Method of National Committee on
Rubber and Rubber Products of Standardization Administration of China is responsible
for the explanation of this Standard.
Responsible drafting organization of this Standard. Changzhou Bolang Auto Parts Co.,
Ltd.
Participating drafting organization of this Standard. Rubber Group Northwest Rubber
and Plastic Research and Design Institute.
Main drafters of this Standard. Zhang Meiling, Zhu Wei.
This Standard replaces the standard previously issued as follows.
- GB/T 1690-1982, GB/T 1690-1992.
Introduction
The action of a liquid on vulcanized rubber can generally result in.
a) Absorption of the liquid by the rubber;
b) Extraction of soluble constituents from the rubber;
c) A chemical reaction with the rubber.
The amount of absorption [a)] is usually larger than that of extraction [b)], so that the
net result is an increase in volume, commonly termed “swelling”. The absorption of
liquid can profoundly alter physical and chemical properties and hence change tensile
strength, extensibility and hardness of the rubber, so it is important to measure these
properties after treatment of the rubber. The extraction of soluble constituents,
especially plasticizers and anti-degradants, can likewise alter the rubber’s physical
properties and chemical resistance after drying (assuming the liquid to be volatile).
Therefore, it is necessary to test these properties following immersion or drying of the
rubber.
This Standard specifies the test methods necessary for determining the changes in the
following properties.
- Change in mass, volume, and linear dimensions;
- Extractable matter;
- Change in hardness and tensile stress-strain properties after immersion and after
immersion and drying.
Although in some respects these tests might simulate service conditions, no direct
correction with service behavior is implied. Thus, the rubber giving the lowest change
in volume is not necessarily the best one in service. The thickness of the rubber needs
to be taken into account since the rate of penetration of liquid is time-dependent and
the bulk of a very thick rubber product might remain unaffected for the whole of the
projected service life, especially with viscous liquids. Moreover, it is known that the
action of a liquid on rubber, especially at high temperature, can be affected by the
presence of atmospheric oxygen. The test method in this Standard provides reference
data for test on the impact of given (or identical) controllable mineral oils, fuel oils, or
other liquids to rubbers.
The effect of a liquid might depend on the nature and magnitude of any stress within
the rubber. In this Standard, test pieces are tested in an unstressed condition.
Rubber, vulcanized or thermoplastic –
Determination of the effect of liquids
WARNING. Personnel using this Standard shall 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 the methods of evaluating the resistance of vulcanized and
thermoplastic rubbers to the action of liquids by measurement of properties of the
rubbers before and after test in test liquids. The liquids concerned include current
service liquids, such as petroleum derivatives, organic solvents, and chemical
reagents, etc.
This Standard applies to vulcanized rubber or thermoplastic rubber.
2 Normative references
The following documents are essential to the application of this document. For the
dated documents, only the versions with the dates indicated are applicable to this
document; for the undated documents, only the latest version (including all the
amendments) are applicable to this Standard.
GB/T 262 Petroleum products and hydrocarbon solvents - Determination of aniline
point and mixed aniline point (GB/T 262-1988, neq ISO 2977.1974)
GB/T 528-1998 Rubber, vulcanized or thermoplastic - Determination of tensile
stress-strain properties (eqv ISO 37.1994)
GB/T 1884 Crude petroleum and liquid petroleum products - Laboratory
determination of density - Hydrometer method (GB/T 1884-2000, eqv ISO
3675.1998)
GB/T 2941 Rubber - General procedures for preparing and conditioning test pieces
for physical test methods (GB/T 2941-2006, ISO 23529.2004, IDT)
GB/T 3535 Petroleum products - Determination of pour point (GB/T 3535-1983, neq
ISO 3016.1974)
GB/T 3536 Petroleum products - Determination of flash and fire points - Cleveland
open cup method (GB/T 3536-1983, eqv ISO 2592.1973)
GB/T 6031-1998 Rubber, vulcanized or thermoplastic - Determination of hardness
(10 ~ 100 IRHD) (idt ISO 48.1...
......
 
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.