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GB/T 42047-2022Determination of off gassed products from materials and assembled articles in a pressurized cabin of manned spacecraft (English PDF)

载人航天器密封舱内材料和部组件出气产物测定方法

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Issued by

State Administration for Market Regulation, China National Standardization Administration

Level / Type

National · Recommended

Issue date

October 12, 2022

Implementation date

October 12, 2022

Scope

GB/T 42047-2022 is the English-translated version of 载人航天器密封舱内材料和部组件出气产物测定方法.

GB/T 42047-2022 is the Chinese standard "Determination of off gassed products from materials and assembled articles in a pressurized cabin of manned spacecraft".

Its scope clause reads: This document specifies the determination method for the composition and concentration of the gas products of the internal materials and parts of the airtight compartment of the manned spacecraft.

This document is applicable to the screening test of materials and components in the airtight cabin of manned spacecraft. Its clauses include terms and definitions.

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Document preview — GB/T 42047-2022

National Standard of the People's Republic of China

ICS: 49.025
Classification: V 71

Issued by: State Administration for Market Regulation, China National Standardization Administration

Preface
Introduction
1 Scope
2 Normative references
3 Terms and Definitions
4 Test operator health and safety
5 Test conditions
6 Instruments and materials
7 Test sample
8 Test preparation
9 Test procedure
10 Measurement accuracy
11 Test report
Appendix A (informative) This document corresponds to a list of structure numbers corresponding to ISO 14624-3.2005
Appendix B (informative) Technical differences between this document and ISO 14624-3.2005 and their reasons
Appendix C (Informative) Qualification and Certification of Test Facilities
Appendix D (Informative) List of Maximum Allowable Concentrations of Compounds in Sealed Chambers of Manned Spacecraft

1 Scope

This document specifies the determination method for the composition and concentration of the gas products of the internal materials and parts of the airtight compartment of the manned spacecraft.

This document is applicable to the screening test of materials and components in the airtight cabin of manned spacecraft.

2 Normative references

This document has no normative references.

3 Terms and Definitions

The following terms and definitions apply to this document.

3.1 component assembledarticle

An element or combination of elements.

3.2 offgassed products

The release of organic or inorganic gases from materials or components.

3.3 vent gas offgassing

The process by which gaseous products are released from a liquid or solid material into the surrounding atmosphere.

3.4 Spacecraft maximum allowable concentration

The maximum concentration of outgassing products allowed in the habitable or working area of a spacecraft for a specific mission.

3.5 Comparison test roundrobin testing

A test in which the same material is tested in different test facilities to compare the test results.

3.6

The ratio of the standard deviation of each outgassing component to the total concentration of outgassing components in replicate samples of standard material.

NOTE. For actual samples, the expected test results and mean relative standard deviation for outgassing product concentrations are close to 50%. Standard deviation s and relative standard deviation mean

The ratio As is determined by formula (1) and formula (2) respectively.

s= i=1 xi-x 2 n-1 (1)

In the formula.

s --- standard deviation;

xi---the average concentration of a single outgassing component;

GB/T 43223 | GB/T 32453 | GB/T 47271 | GB/T 42046 | […]

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 4 pages — is available in the English PDF.

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