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  • BSI
    BS EN ISO 20486:2018 Non-destructive testing. Leak testing. Calibration of reference leaks for gases
    Edition: 2018
    $442.60
    / user per year

Description of BS EN ISO 20486:2018 2018

This document specifies the calibration of those leaks that are used for the adjustment of leak detectors for the determination of leakage rate in everyday use. One type of calibration method is a comparison with a reference leak. In this way, the leaks used for routine use become traceable to a primary standard. In other calibration methods, the value of vapour pressure was measured directly or calculated over a known volume.

The comparison procedures are preferably applicable to helium leaks, because this test gas can be selectively measured by a mass spectrometer leak detector (MSLD) (the definition of MSLD is given in ISO 20484).

Calibration by comparison (see methods A, As, B and Bs below) with known reference leaks is easily possible for leaks with reservoir and leakage rates below 10−7 Pa·m3/s.

Figure 1 gives an overview of the different recommended calibration methods.

Figure 1Calibration ranges

image
a) Calibration by comparison
image
b) Calibration by direct measurement


Standard NumberBS EN ISO 20486:2018
TitleNon-destructive testing. Leak testing. Calibration of reference leaks for gases
StatusUnder Review
Publication Date2018-03-06
ReplacesBS EN 13192:2002
Identical National Standard OfEN ISO 20486:2018, ISO 20486:2017
DescriptorsLeak tests, Gas-resistance tests, Calibration, Flow measurement, Non-destructive testing, Gases, Leak detectors, Mathematical calculations, Tracer methods
ICS19.100 Non-destructive testing
CommitteeWEE/46
ISBN978 0 580 94918 0
PublisherBSI
Pages42

About BSI

BSI Group, also known as the British Standards Institution is the national standards body of the United Kingdom. BSI produces technical standards on a wide range of products and services and also supplies certification and standards-related services to businesses.
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