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GB/T 5563-2013 English PDF (GBT5563-2013)

GB/T 5563-2013 English PDF (GBT5563-2013)

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GB/T 5563-2013: Rubber and plastics hoses and hose assemblies -- Hydrostatic testing

GB/T 5563-2013
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 23.040.70
G 42
GB/T 5563-2013 / ISO 1402.2009
Replacing GB/T 5563-2006
Rubber and plastics hoses and hose assemblies
- Hydrostatic testing
(ISO 1402.2009, IDT)
ISSUED ON. DECEMBER 31, 2013
IMPLEMENTED ON. SEPTEMBER 01, 2014
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
1 Scope ... 5
2 Normative references ... 5
3 Terms and definitions ... 5
4 General requirements ... 5
5 Apparatus ... 5
6 Test pieces ... 6
7 Application of hydrostatic pressure ... 6
8 Hydrostatic pressure tests ... 7
9 Test report ... 13
Foreword
This Standard is drafted according to the rules given in the GB/T 1.1-2009. This Standard replaced GB/T 5563-2006 “Rubber and plastics hoses and hose assemblies - Hydrostatic testing”. Compared with GB/T 5563-2006, the main changes of this Standard are as follows.
- ADD the terms and determination (refer to Chapter 3);
- REVISE the Chapter 4 (refer to Chapter 5; the Chapter 4 of 2006-edition); - ADD “When a particular hose type or size needs longer measurement, it shall be specified in the hose product standard.” (refer to 6.2);
- ADD “Note 1. use the term ‘maximum working pressure’ instead of the
deprecated term ‘design working pressure’. ” (refer to 8.1);
- REVISE the general procedure (refer to 8.2.1, 7.2.1 in 2006-edition); - ADD “Apply 0.07MPa of pressure for approximately 5 min after completion of the proof pressure test. The supporting surface upon which the hose/hose assembly rests shall be flat and smooth enough to allow the hose/hose assembly to expand or contract without restriction. Alternatively, the hose/hose assembly may be supported on rollers, or suspended vertically. When a section of hose is used as a test piece, it may also be placed in a test rig in a vertical position.” (refer to 8.2.1.1);
- ADD “For hose assemblies, measure the distance between the contact faces of the end fittings, or select the reference marks on the hose surface near the end of the inserted part of the fitting.” (refer to 8.2.1.2);
- ADD “The change percentage in length will be positive (+) when increase length and negative (−) when decrease length.” (refer to 8.2.2);
- DELETE “When the fittings are pull-out, any failures caused by leakage or burst that is 25mm apart from the fittings or within the distance that equal to the hose outer-diameter (maximum) shall not be considered as the real hose bursting.” (refer to 8.3, 7.3 in 2006-edition);
- ADD Figure 3, the hydrostatic test procedure specified in this Standard (refer to Figure 3).
This Standard uses translation method and equally adopts ISO 1402.2009 “Rubber and plastics hoses and hose assemblies - Hydrostatic testing”.
The national documents that have the consistency and correspondence with international documents which are normative references in 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 7528-2011 Rubber and plastics hoses and hose assemblies - Vocabulary (ISO 8330.2007, IDT);
- GB/T 9574-2001 Rubber and plastics hoses and hose assemblies - Ratios of proof and burst pressure to design working pressure (ISO 7751.1991, IDT); - GB/T 9573-2003 Rubber and plastics hoses and hose assemblies - Methods of measurement of dimension (ISO 4671.2007, IDT).
This Standard was proposed by China Petroleum and Chemical Industry Federation. This Standard shall be under the jurisdiction of National Technical Committee on Rubber and Products of Standardization Administration of China.
Drafting organizations of this Standard. Luohe Letong Rubber Co., Ltd., Guangzhou Mingjun Balflex Rubber Co., Ltd., and Shenyang Rubber Research and Design Institute. The main drafters of this Standard. Zhong Weijiang, Zhang Jingxiang, Wang Shuli, Zhao Hongliang, and Zhang Tong.
The historical versions replaced by this Standard are as follows.
- GB/T 5563-1985, GB/T 5563-1994, GB/T 5563-2006.
Rubber and plastics hoses and hose assemblies
- Hydrostatic testing
1 Scope
This Standard specifies methods for the hydrostatic testing of rubber and plastics hoses and hose assemblies, including methods for the determination of dimensional stability.
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.
ISO 4671 Rubber and plastics hoses and hose assemblies - Methods of
measurement of the dimensions of hoses and the length of hose assemblies ISO 7751 Rubber and plastic hoses and hose assemblies - Ratios of proof and burst pressure to design working pressure
ISO 8330 Rubber and plastics hoses and hose assemblies - Vocabulary
ISO 23529 Rubber - General procedures for preparing and conditioning test pieces for physical test methods
3 Terms and definitions
The terms and definitions given in ISO 8330 apply to this document.
4 General requirements
Unless otherwise specified, all tests shall be carried out at standard temperature (refer to ISO 23529).
5 Apparatus
5.1 Pressure pump
It is capable of applying pressure at the rate according to 7.2.2, up to the required test pressure.
5.2 Calibrated pressure gauge or pressure transducer with digital display For each test, test pressure shall choose the value between 15 % and 85 % of the maximum scale.
To guarantee the accuracy, calibrated pressure gauges or pressure transducers with digital displays shall be checked at frequent intervals, and the fitting of restrictors is recommended to minimize shock damage.
5.3 Size measuring instruments
Vernier callipers or micrometer, length measuring tape, circumferential measuring tape (π measuring tape).
6 Test pieces
6.1 Hose assemblies
When hose assemblies are to be tested, the manufactured assembly length shall comply with the test.
6.2 Hoses
The hydrostatic pressure and burst tests shall be carried out on a hose test piece with a minimum free length, excluding end fittings and end reinforcements. The minimum free length is of 600 mm when deformation is to be measured, and it is of 300 mm when it is not. When a longer test length is required for a particular hose type or size, it must be specified in the hose product standard.
6.3 Number of the test pieces
At least two test pieces shall be tested.
7 Application of hydrostatic pressure
7.1 General requirements
Water or another liquid suitable for the hose under test shall be used as the test medium.
WARNING. Hoses and hose assemblies pressurized by liquids may fail in a potentially dangerous manner. For this reason, the test shall be carried out in a suitable closed state. Also, the use of air and other gases as test media shall be avoided because of the risk to operators. In special cases, where such media t1 - keeping time of specified pressure;
t2 - measuring time of initial dimensions (length and diameter) under reference pressure of 0.07 MPa;
t3 - waiting time specified under different pressures;
a - burst.
This complete test sequence (proof pressure - testing pressure - bursting pressure) only applies to “type tests”. For routine tests, the “measuring sequence” after the proof pressure is applicable only when the relevant hose product standard specifies. Measure the initial length and diameter/circumference and place reference marks for twisting measurement between points A and B. Measure the increase in the length, diameter/circumference, twisting and warping directly before point C.
Figure 3 Hydrostatic test procedure specified in this Standard
8.4 Leakage test
8.4.1 Test piece
The test pieces for the leakage test shall comprise unaged hose assemblies on which the end fittings have been attached for not more than 30 days and not less than 1 day. 8.4.2 Procedure
Hydrostatic pressure specified in test assemblies shall be the 70% of minimum burst pressure. Maintain this specified test pressure for 5 min ± 0.5 min and then reduce it to zero. Re-apply the specified test pressure and maintain it for a further period of 5 min ± 0.5 min. This is considered as the destructive test and the test assemblies shall be destroyed after test.
8.4.3 Criteria for failure
There shall be no evidence of leakage or failure.
Leakage at the end fitting, fitting blow-off or rupture of the hose adjacent to the fitting shall be considered as failures in the performa...

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