GB/T 14905-2020 PDF English
US$230.00 · In stock · Download in 9 secondsGB/T 14905-2020: Rubber and plastics hoses. Determination of adhesion between components Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedureStatus: Valid GB/T 14905: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivery | Name of Chinese Standard | Status |
| GB/T 14905-2020 | English | 230 |
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Rubber and plastics hoses. Determination of adhesion between components
| Valid |
| GB/T 14905-2009 | English | 70 |
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Rubber and plastics hoses -- Determination of adhesion between components
| Obsolete |
| GB/T 14905-1994 | English | 439 |
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4 days
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Rubber and plastics hose and hose assemblies. Wire reinforced. Hydraulic impulse test with flexing
| Obsolete |
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GB/T 14905-2020: Rubber and plastics hoses. Determination of adhesion between components---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT14905-2020
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 23.040.70
G 42
GB/T 14905-2020 / ISO 8033.2016
Replacing GB/T 14905-2009
Rubber and Plastics Hoses - Determination of
Adhesion between Components
(ISO 8033.2016, IDT)
Issued on. NOVEMBER 19, 2020
Implemented on. OCTOBER 1, 2021
Issued by. State Administration for Market Regulation;
Standardization Administration of the People’s Republic of
China.
Table of Contents
Foreword... 3
1 Scope... 5
2 Normative References... 5
3 Terms and Definitions... 6
4 Principle... 6
5 Apparatus... 6
6 Test Pieces... 7
7 Procedure... 11
8 Expression of Results... 11
9 Test Report... 12
Bibliography... 18
Foreword
This Standard was drafted in accordance with the rules in GB/T 1.1-2009.
This Standard serves as a replacement of GB/T 14905-2009 Rubber and Plastics
Hoses - Determination of Adhesion between Components. In comparison with GB/T
14905-2009, the main technical changes are as follows.
---The Chapter “Terms and Definitions” is added (see Chapter 3);
---The scope of application of Type 7 test piece is expanded; it is applicable to
hoses whose spacing between adjacent coils of the helix is greater than 10 mm,
and also suggestions for the preparation of test pieces when the spacing
between adjacent coils of the helix is less than 10 mm are provided (see 6.3.8;
5.3.8 of Version 2009);
---Figure 1 ~ Figure 8 are modified, so that the representation of these figures can
be more accurate, and the misunderstandings of standard users can be
reduced (see Figure 1 ~ Figure 8; Figure 1 ~ Figure 8 of Version 2009).
This Standard uses the translation method in the equivalent adoption of ISO 8033.2016
Rubber and Plastics Hoses - Determination of Adhesion between Components.
The Chinese documents that have a consistent correspondence with the international
documents in the Normative References of this Standard are as follows.
---GB/T 2941-2006 Rubber - General Procedures for Preparing and Conditioning
Test Pieces for Physical Test Methods (ISO 23529.2004, IDT);
---GB/T 12833-2006 Rubber and Plastics - Analysis of Multipeak Traces Obtained
in Determinations of Tear Strength and Adhesion Strength (ISO 6133.1998,
IDT);
---GB/T 17200-2008 Technical Specification for Tensile, Compression and Flexural
Testing Machines for Rubber and Plastics (constant rate of traverse) (ISO
5893.2002, IDT).
This Standard was proposed by China Petroleum and Chemical Industry Federation.
This Standard shall be under the jurisdiction of National Technical Committee 35 on
Rubber & Products of Standardization Administration of China (SAC/TC 35).
The drafting organizations of this Standard. Shengli Oilfield Changlong Rubber &
Plastic Co., Ltd.; Shenyang Rubber Research & Design Institute.
The main drafters of this Standard. Mu Xuejie, Zhang Yigui, Wang Shuli.
The issuing of the previous versions.
---GB/T 14905-1994, GB/T 14905-2009.
Rubber and Plastics Hoses - Determination of
Adhesion between Components
1 Scope
Adequate adhesion between components of a hose is the basis for the hose to perform
well during use. This Standard specifies methods for the determination of the adhesion
between lining and reinforcement, between cover and reinforcement, between
reinforcement layers, between cover and outer lamination (thin layer of material
outside the cover for protection) and between lining and inner lamination (thin layer of
material inside the lining to reduce permeation of fluid into the lining).
2 Normative References
The following documents are indispensable to the application of this document. In
terms of references with a specified date, only versions with a specified date are
applicable to this document. In terms of references without a specified date, the latest
version (including all the modifications) is applicable to this document.
ISO 5893 Rubber and Plastics Test Equipment - Tensile, Flexural and Compression
Types (constant rate of traverse) - Specification
3 Terms and Definitions
For the purposes of this document, the terms and definitions given in ISO 8330 apply.
ISO and IEC maintain terminological databases for use in standardization at the
following addresses.
4 Principle
Using test pieces of standard dimensions, the adhesion strength between lining and
reinforcement, between cover and reinforcement, between reinforcement layers,
between cover and outer lamination and between lining and inner lamination is
measured under specified conditions.
5 Apparatus
The machine shall be power driven, equipped with a suitable dynamometer, capable
of maintaining a substantially constant rate of traverse of the moving head during the
test and fitted with an autographic recorder. It shall comply with the requirements for
class 0.5 or 1 of ISO 5893.
For testing ring test pieces (type 6 and type 8), a mandrel shall be provided that is a
close sliding fit in the test piece. This mandrel shall be capable of being fitted into the
driven head of the machine so that it will rotate freely during the test.
6 Test Pieces
Strip, cut from the hose as a 35 mm ± 2 mm wide ring which is then cut transversely
to form a strip.
Strip, cut along a reinforcing helix, 25 mm ± 0.5 mm wide or the maximum obtainable.
7 Procedure
The rate of travel of the power-driven grip shall be such as to provide a rate of ply
separation of 50 mm/min ± 5 mm/min (for test pieces of types 1 to 7) or 25 mm/min ±
2.5 mm/min (for type 8 test pieces).
If separation occurs at any other point, for example, inside either component under
test, note this failure and report the force at which it occurs.
8 Expression of Results
The trace obtained from the graphical recorder shows the variations in the force at
which the plies or layers have separated.
9 Test Report
The test report shall contain the following information.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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