GB/T 40531.1-2021Ships and marine technology - Specifications for gas detectors intended for use on board ships - Part 1: Portable gas detectors for atmosphere testing of enclosed spaces (English PDF)

1 Scope

This document specifies the performance, gas measurement, sensitivity, result display, and performance of portable gas detectors used before entering enclosed spaces on ships

Alarm level, impact resistance, temperature and humidity protection, and measurement requirements, etc.

This document can be used for portable gas detector testing to prove compliance with SOLAS Convention XI-1/7 "Gas Detection in Enclosed Spaces"

"Detector" requirements can also be used to determine whether portable gas detectors on the market meet the requirements of the SOLAS Convention.

Note 1.From July 1,.2016, SOLAS Convention XI-1/7 stipulates portable gas testing equipment and shipboard equipment. The SOLAS Convention requires that

The portable gas testing equipment on board in front of the shelter can at least test the concentration of oxygen, combustible gas or steam, hydrogen sulfide, and carbon monoxide.

In order to measure the concentration of combustible gas or vapor, the combustible gas mentioned in this document is methane or a mixture of propane and butane, and it is required to be portable

The type of combustible gas is clearly marked on the integrated gas detector. Unmarked combustible gases cannot be detected and measured by portable gas detectors.

Note 2.The portable gas detector can use isobutane as the calibration gas when measuring propane and butane gas.

This document does not apply to the toxicity test of combustible gas.

2 Normative references

The contents of the following documents constitute the indispensable clauses of this document through normative references in the text. Among them, dated quotations

Only the version corresponding to that date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to

This document.

IEC 60079-0 Explosive atmospheres Part 0.General requirements for equipment (Explosive atmospheres-Part0.Equip- ment-Generalrequirements)

IEC 60079-29-1 Explosive Atmosphere Part 29-1.Gas Detector Combustible Gas Detector Performance Requirements (Explosive atmospheres-Part 29-1.Gasdetectors-Performancerequirementsofdetectorsforflammablegases)

IEC 60079-29-2 Explosive Atmosphere Part 29-2.Gas Detector Combustible Gas and Oxygen Detector Selection, Installation,

Use and maintenance (Explosive atmospheres-Part 29-2.Gasdetectors-Selection, instalation, use and mainte- nanceofdetectorsforflammablegasesandoxygen)

IEC 60092-504 Ship Electrical Equipment Part 504.Automation, Control and Measuring Instruments (Electricalinstalationsin ships-Part 504.Automation,controlandinstrumentation)

IEC 60529 enclosure protection level (IP code) [Degrees of protection provided by enclosures (IP code)]

IEC 60533 Electromagnetic compatibility of electrical and electronic equipment in ships (Electricalandelectronicinstalationsinships-

Electromagneticcompatibility)

IMORes.A.1050(27) "Recommendations for Entering Enclosed Spaces on Ships" Appendix 7 Test Gas (Revisedrec- ommendationsforenteringenclosedspacesaboardships,Annex,section7Testingtheatmosphere)

SOLAS Convention XI-1/7 Gas detection equipment in enclosed spaces (Atmosphere testing instrument for enclosed spaces)

3 Terms and definitions

The following terms and definitions apply to this document. […]