GB/T 35049-2018 in English

VALID

Vacuum technology--Leak testing method by quadrupole mass spectrometer

Issued on:2018-05-14
Implemented on:2018-12-01
File Format:PDF
Delivery:Via email within 5 business days

Price(USD)： $370.00
$359.00

Standard No:	GB/T 35049-2018
Document status:	VALID
Title in English:	Vacuum technology--Leak testing method by quadrupole mass spectrometer
Title in Chinese:	真空技术四极质谱检漏方法
Language:	English
File Format:	Electronic (PDF)
Delivery:	Via email within 5 business days
Issued on:	2018-05-14
Implemented on:	2018-12-01
ICS Classification:	23.160-Vacuum technology
Chinese Classification:	J78-Vacuum technique and equipment
Professional Classification:	GB-National Standard
Related Keywords:	vacuum chamber method response time requirement blowing method vacuum equipment leak location length≤τ vacuum chamber method parallel detection standard technical framework leak detection method applicable scenarios sensitivity range measurement method
Related Topics:	mass spectrometry Mass Spectrometer Vacuum triple quadrupole mass spectrometer quadrupole mass spectrometer with quadrupole Vacuum system leak rate test method Based on mass spectrometry Lithium Aluminum Hydride Vacuum Various mass spectrometry techniques Vacuum leak detection box Vacuum box leak detection electric quadrupole Three-stage mass spectrometry Vacuum Leak Detector Organic Mass Spectrometry Techniques and Methods quadrupole technology Organic Mass Spectrometry Methods Qualitative Quartering of Mass Spectrometry Vacuum during mass spectrometry Mass Quadrupole Detector Instant Vacuum Technology mass spectrometer vacuum polarographic+ Vacuum and Mass Spectrometry Vacuum leak detection box Vacuum box leak detector Four Spectrum mass spectrometry terms Mass Spectrometer Vacuum Chamber mass spectrometry terms Mass Cytometry flow mass spectrometry Mass spectrometry and quadrupole mass spectrometry Vacuum leak detector mass spectrometry method Leak detection of vacuum equipment quadrupole field a2 icp mass spectrometry Vacuum equipment leak detection icp mass spectrometry Sniffer leak detection Spectral vacuum How to detect leaks in vacuum equipment Other mass spectrometry techniques leak detection technology and Triple Quadrupole Mass Spectrometer mass spectrometry in How to detect vacuum Used Vacuum Leak Detectors Vacuum box leak detector Quadrupole Fields in Mass Spectrometry Efficient Leak Detection Method Efficient leak detection methods Mass detector quadrupole quadrupole air leak Leak box method multiple mass spectrometry leak How to detect leaks in vacuum equipment Chromatographic Detector Technology pole vacuum Mass Spectrometry Leak Detection Vacuum leak test Vacuum box leak test Mass Spectrometry Vacuum leak detection box with double fins vacuum technology detection method Mass spec vacuum + degree Mass Spectrometry Elementary Vacuum system leak rate Mass spectrometry at home and abroad Mass spectrometer quadrupole flight Four items of air quality testing Vacuum equipment leak detection method Vacuum system leak detection method Vacuum leak detection method, instrument Four-electrode detection method mass spectrometry Air Quality Detection Technology Mass spectrometry inspection quadrupole mass spectrometer time-of-flight mass spectrometry How to detect vacuum quadrupole mass spectrometry method Mass Spec Polarity Based Vacuum Equipment Leakage Method How to check mass spectrometry Quartic spectrum Quaternary Mass Spectrometer Mass Analyzer Mass Spectrometry Ionization Technology Mass Spectrometry Ionization Technology quadrupole mass spectrometry mass spectrometry method Leak detection of two vacuum boxes Mass spectrometry inspection Argon mass spectrometry leak detection The detection method of the four items of electrolyte Mass Spectrometry Helps MS/MS Vacuum degree detection method middle ladder quadrupole method Mass Spectrometry Quadruplicate Mass Spectrometry Application Quadrupole mass spectrometer and sextaple mass spectrometer Advantages of quadrupole mass spectrometry How to use quadruple mass spectrometry mass spectrometry Vacuum system leak rate test method How to use quadrupole mass spectrometry GBT35049 GB/T 35049-2018 Vacuum suppressor leaking Partial pressure leak detection method of mass spectrometer Mass spectrometry vacuum range Burette leak detection method Mass spectrometry vacuum hours direct mass spectrometry Mass spectrometry detection technology industry Water quality tetracarboxylic acid detection method Leak detection method-spray gun method Dissolution medium vacuum degassing method Mass spectrometry bond breaking method Mass spectrometry method development Four classification methods of chromatography Netdisk Biomass Spectrometry Technology and Methods Exploring mass spectrometry methods Vacuum leak detection box technology Dual spectrum detection technology Liquid leakage detection method Vacuum side leakage Negative pressure vacuum detection method follows Mass Spectrometry Technology Methodology Mass Spectrometry Conditions Four-ring electrode depolarization method Vacuum leak detection standard block Vacuum leak test standard block

《GB/T 35049-2018真空技术四极质谱检漏方法》由TC18（全国真空技术标准化技术委员会）归口，主管部门为中国机械工业联合会。

Introduction

Analysis of standard technical framework

Leak detection method	Applicable scenarios	Sensitivity range (Pa·m³/s)	Response time requirement
Blowing method	Vacuum equipment leak location	≤1×10⁻⁸	Scanning step length≤τ
Vacuum chamber method	Parallel detection of multiple components	≤1×10⁻⁹	Test time≥3τ
Non-vacuum accumulation method	Total leakage rate of positive pressure equipment	≤5×10⁻⁷	Accumulation time≥5min
Sniffing gun method	Normal pressure environment positioning	≤1×10⁻⁶	Moving speed≤10mm/s

Key technical elements

1. Principles of tracer gas selection

The standard clearly requires avoiding high-content gases in the environment (such as N₂, O₂), and giving priority to helium (4u) or krypton (84u) and other characteristic mass number gases. In practical applications, helium is often used in the aerospace field, while SF₆ is commonly used in nuclear power systems.

2. Equipment performance indicators

Resolving power: ≤1u (ensuring mass number differentiation capability)
Minimum detectable pressure: ≤1.0×10⁻⁸Pa
Parallel detection channels: ≥10 (multi-component synchronous monitoring)

3. Sensitivity calculation model

The standard gives a unified calculation formula:

Q_emin = (I_n/(I₁-I₀))×Q₀

The measurement of the noise value I_n needs to exclude accidental pulse interference. The typical spacecraft leak detection requires a sensitivity of the order of 10⁻⁹Pa·m³/s.

Industry application cases

Satellite fuel tank leak detection

The vacuum chamber method is used, with helium as the tracer gas:

Evacuate the cabin to a vacuum degree of 10⁻³Pa
Fill with 1.5MPa high-purity helium
Monitor the change in ion flow at the mass number 4u
According to the standard formula, the leak rate is 2.3×10⁻¹⁰Pa·m³/s

Standard implementation recommendations

1. Key points for personnel training

GB/T 9445 non-destructive testing level II qualification must be obtained
Focus on the measurement method of response time τ (determination of the 63% change point of the signal)

2. Equipment maintenance specifications

Perform the following tasks every week

Ion source cleaning
Standard leak calibration
Background signal detection (required to be <10⁻⁹A)

More samples: GB 50021-2001(2009) GB 18306-2015 JJG 21-2008

Sample only — not a preview of GB/T 35049-2018

Loading PDF document...

Error loading PDF. Please make sure the file is valid and try again.

We also recommend

GB/T 7774-2007 in English

Vacuum technology -Turbomolecular pumps - Measurement of performance characteristics
2007-12-20
GB/T 3163-2024 in English

Vacuum technology—Vocabulary
2024-09-29
GB/T 21271-2007 in English

Vacuum technology - Noise measurement for vacuum pumps
2007-12-20
GB/T 3164-2007 in English

Vacuum technology - Graphical symbols
2007-12-20
GB/T 19955.1-2005 in English

Vapour vacuum pump—Measurement of performance characteristics—Part 1:Measurement of volume rate of flow(pumping speed)
2005-09-19
GB/T 4983-2003 in English

Vacuum technology—Quick release couplings—Dimensions—Part 2:Screwed type
1985-03-06