GB/T 40531.1-2021 (English Version) PDF

Scope: This document specifies the performance, measurement gas, sensitivity, result display, alarm level, impact resistance, temperature and humidity protection and measurement requirements of portable gas detectors used before entering enclosed spaces on board ships. This document can be used for the detection of portable gas detectors to prove whether they comply with the requirements of SOLAS Convention XI1/7 "Gas Detectors in Enclosed Spaces", and can also be used to determine whether portable gas detectors on the market comply with the requirements of the SOLAS Convention. Note 1: From July 1, 2016, SOLAS Convention XI1/7 stipulates portable gas testing equipment and on-board equipment. The SOLAS Convention requires that the portable gas testing equipment on board the ship can at least test the concentration of oxygen, combustible gas or vapor, hydrogen sulfide and carbon monoxide before entering the enclosed space. In order to measure the concentration of combustible gas or vapor, the combustible gas described in this document is a mixture of methane or propane and butane, and it is required to clearly mark the type of combustible gas on the portable gas detector. Unmarked combustible gases cannot be detected and measured by portable gas detectors. Note 2: Portable gas detectors can use isobutane as a calibration gas when measuring propane and butane gases. This document does not apply to the toxicity test of combustible gas.

GB/T 40531.1-2021 Referenced Document

IEC 60079-0 Interpretation Sheet 2 - Explosive atmospheres - Part 0: Equipment - General requirements
IEC 60533 Electrical and electronic installations in ships — Electromagnetic compatibility (EMC) — Ships with a metallic hull

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