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Nitrogen for use in aircraft
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Basic data
| Standard ID | GB/T 43378-2023 (GB/T43378-2023) |
| Description (Translated English) | Nitrogen for use in aircraft |
| Sector / Industry | National Standard (Recommended) |
| Classification of Chinese Standard | V39 |
| Classification of International Standard | 49.080 |
| Word Count Estimation | 6,650 |
| Date of Issue | 2023-11-27 |
| Date of Implementation | 2024-03-01 |
| Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration |
Similar standards
GB/T 36258|GB/T 39095|GB/T 43378-2023: Nitrogen for use in aircraft
---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.
ICS 49:080
CCSV39
National Standards of People's Republic of China
Nitrogen for aircraft
(ISO 2435:1973,MOD)
Published on 2023-11-27
2024-03-01 Implementation
State Administration for Market Regulation
Released by the National Standardization Administration Committee
Foreword
This document complies with the provisions of GB/T 1:1-2020 "Standardization Work Guidelines Part 1: Structure and Drafting Rules of Standardization Documents"
Drafting:
This document is modified to adopt ISO 2435:1973 "Nitrogen for Aircraft":
Compared with ISO 2435:1973, this document has made the following structural adjustments:
a) Added Chapter 2 normative reference documents;
b) Added Chapter 3 Terms and Definitions;
c) Chapter 4 corresponds to Chapter 2 of ISO 2435:1973;
d) Chapter 5 corresponds to Chapter 3 of ISO 2435:1973:
The technical differences between this document and ISO 2435:1973 and their reasons are as follows:
a) Added onboard prepared nitrogen for fuel tank inerting to cover the range of nitrogen currently in use on aircraft (see Chapter 1);
b) Added pressure and characteristic requirements for fuel tank inerting, the requirements are consistent with 3:7:1:3 in HB8545-2018 (see respectively
Chapter 4 and 5:1, 5:2, 5:3, 5:4) to distinguish their different technical requirements;
c) Metric units are added before the imperial units (the metric units are numerically rounded based on the imperial units) to improve the ease of use of the standards:
Usefulness (see Chapter 4):
The following editorial changes have been made to this document:
---Added references:
Please note that some content in this document may be subject to patents: The publisher of this document assumes no responsibility for identifying patents:
This document is proposed and coordinated by the National Aircraft Standardization Technical Committee (SAC/TC435):
This document was drafted by: Hefei Jianghang Aircraft Equipment Co:, Ltd:, China Aviation Technology Research Institute, Shenyang Aircraft Industry (Collection)
Group) Co:, Ltd:, Jinhong Gas Co:, Ltd:, and Guangdong Huate Gas Co:, Ltd:
The main drafters of this document: Huang Xuefei, Yang Bao, Liu Wenbiao, Ren Xiujun, Wang Bing, Wei Weidong, Wu Houtian, Ren Haitao, Liu Haiyan, Zhu Jun,
Ji Donglei, Sun Meng, Fu Zhuhong:
Nitrogen for aircraft
1 Scope
This document specifies the pressures and characteristics of nitrogen for aircraft:
This document applies to compressed nitrogen for aircraft oil lubrication equipment and airborne prepared nitrogen for fuel tank inerting:
This document does not apply to nitrogen used in oxygen systems:
2 Normative reference documents
This document has no normative references:
3 Terms and definitions
There are no terms or definitions to be defined in this document:
4 pressure
Under 20℃ conditions, the compressed nitrogen supply pressure should ensure that the aircraft system can be filled up to 35MPa (343bar or 4975lbf/in2):
Under the conditions of 0℃~100℃, the maximum working pressure of airborne nitrogen preparation does not exceed 1:5MPa (15bar or 222lbf/in2):
Note: The working pressure of compressed nitrogen for aircraft is as follows:
a) 21MPa (207bar or 3000lbf/in2);
b) 28MPa (276bar or 4000lbf/in2);
c) 35MPa (343bar or 4975lbf/in2):
5 features
5:1 Purity
Purity should meet the following requirements:
a) The purity (volume fraction) of compressed nitrogen is not less than 98:5%;
b) The purity (volume fraction) of nitrogen prepared onboard shall not be less than 88%:
5:2 Oily vapors and particles
The total amount of oily vapor and particles should meet the following requirements:
a) Under the conditions of 15℃, 101:3kPa (1013mbar or 14:69lbf/in2), the total amount of oily vapor and particles in compressed nitrogen is not
More than 5×10-3mg/dm3(L);
b) Under the conditions of 15℃, 101:3kPa (1013mbar or 14:69lbf/in2), the oily vapor containing nitrogen prepared onboard does not exceed 1×
10-5mg/dm3(L); the total amount of particles does not exceed 2:5×10-4mg/dm3(L):
5:3 Moisture content
Moisture content should meet the following requirements:
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