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Requirements of aerospace fluid systems impulse testing of hydraulic hose, tubing and fitting assemblies
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Basic data
| Standard ID | GB/T 41028-2021 (GB/T41028-2021) |
| Description (Translated English) | Requirements of aerospace fluid systems impulse testing of hydraulic hose, tubing and fitting assemblies |
| Sector / Industry | National Standard (Recommended) |
| Classification of Chinese Standard | V21 |
| Word Count Estimation | 9,969 |
| Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration |
GB/T 41028-2021: Requirements of aerospace fluid systems impulse testing of hydraulic hose, tubing and fitting assemblies
---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Requirements of aerospace fluid systems impulse testing of hydraulic hose, tubing and fitting assemblies
ICS 49:080
CCSV21
National Standards of People's Republic of China
Aerospace fluid systems hydraulic hoses, pipes and
Impulse test requirements for joint assemblies
(ISO 6772:2012, Aerospace-Fluidsystems-Impulse testingofhydraulic
Published on 2021-12-31
2022-07-01 Implementation
State Administration for Market Regulation
Released by the National Standardization Administration
directory
Preface III
Introduction IV
1 Scope 1
2 Normative references 1
3 Terms and Definitions 1
4 Test conditions 1
5 Test purpose 3
6 Test method 3
7 Intended use 4
Reference 5
foreword
This document is in accordance with the provisions of GB/T 1:1-2020 "Guidelines for Standardization Work Part 1: Structure and Drafting Rules of Standardization Documents"
drafted:
This document is equivalent to ISO 6772:2012 "Impulse testing of hydraulic hoses, pipes and fitting assemblies for aerospace fluid systems":
The following minimal editorial changes have been made to this document:
--- In order to facilitate coordination with existing standardization documents, the standard name was changed to "Hydraulic hoses, pipes and fittings for aerospace fluid systems"
Pulse Test Requirements for Components":
---In the formula (1), the "rate of increase" is changed from the literal expression to the symbol "η":
This document is proposed and managed by the National Aircraft Standardization Technical Committee (SAC/TC435):
This document is drafted by: Commercial Aircraft Corporation of China, Shanghai Aircraft Design and Research Institute, Shanghai Aviation Industry (Group) Co:, Ltd:
Company, Yixiang Intelligent Equipment (Shenzhen) Co:, Ltd:, China Aviation Comprehensive Technology Research Institute, Xiamen Keran Holdings Co:, Ltd:, Qingdao Aoke Ruihuazhi
Energy Equipment Co:, Ltd:
The main drafters of this document: Jin Xin, Yu Hao, Wang Xu, Wang Jun, Wang Dan, Wang Wei, Jiao Yanqiong, Ren Haitao, Dan Dan, Xu Jieli, Wang Yan:
Introduction
In a hydraulic system, the pressure of hydraulic oil is transmitted through pipes, hoses and joint assemblies: In order to prove that these transmission elements are capable of preventing
In order to prevent fatigue failure, it is necessary to carry out an appropriate impulse pressure test:
This document provides general requirements for impulse pressure testing of hydraulic system components:
Aerospace fluid systems hydraulic hoses, pipes and
Impulse test requirements for joint assemblies
1 Scope
This document specifies requirements and procedures for impulse testing of hose, pipe, and fitting assemblies used in aerospace hydraulic systems:
This document applies to impulse testing of hose, pipe and fitting assemblies for aerospace hydraulic systems: This document may also be used for other applicable
Component testing of aerospace fluid systems:
2 Normative references
The contents of the following documents constitute essential provisions of this document through normative references in the text: Among them, dated citations
documents, only the version corresponding to that date applies to this document; for undated references, the latest edition (including all amendments) applies to
this document:
ISO 6771 Aerospace Fluid Systems and Components Pressure and Temperature Classification (Aerospace-Fluidsystemsandcom-
ponents-Pressureandtemperatureclassifications)
ISO 8575 Aerospace-Fluidsystems-Hydraulicsystem
tubing)
3 Terms and Definitions
The following terms and definitions apply to this document:
3:1
rateofrise
Defines the slope of the rising part (straight line) of the pulse pressure in the pressure/time characteristic curve:
Note: The rate of increase can also be defined as the rate of pressure change between 10% and 90% of the total increase in pulse pressure from back pressure to peak pressure:
3:2
peakpressure
The maximum working pressure in a short period of time:
[Source: GB/T 30206:1-2013, 2:25]
4 Test conditions
4:1 Pulse trace
When viewed on an oscilloscope, the pulse traces represent an approximate pressure/time cycle: These pressure/time curves should be as shown in Figure 1
within the shaded area: The dynamic pulse trace produced by the pulse test equipment should be consistent with the pulse trace shown in Figure 1:
...
