GB/T 41028-2021 English PDF

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GB/T 41028-2021: Requirements of aerospace fluid systems impulse testing of hydraulic hose, tubing and fitting assemblies
Status: Valid

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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: 9,913
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: ......

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