Do flammable and toxic gas detectors need to be calibrated annually?

Yes, flammable and toxic gas detectors need to be calibrated annually. This is because the sensitivity of the detector tends to gradually decrease over time, and it may also experience drift due to factors such as environmental conditions during use. Through regular calibration, the accuracy and reliability of the detectors can be ensured; alerts can be issued in a timely manner when dangerous situations such as gas leaks are detected, allowing appropriate actions to be taken to protect the safety of personnel and the integrity of the equipment. .

The last edit to this post was made by cww9521 on 2023-5-30 at 08:05, with the following reply: I. In the checklist issued by the Ministry of Emergency Management in 2019 regarding the publication of the \"Guidelines for Identifying and Addressing Safety Risks and Hazards in Hazardous Chemical Enterprises\", under item (IV) Gas Detection and Alarm Management, 3.2 states that combustible and toxic gas detectors must be calibrated or verified at regular intervals, usually not exceeding one year. II. For combustible gases, Article 5.5 of \"JJG 693-2011 Combustible Gas Detection and Alarm Devices\" specifies that the calibration period for such instruments shall not exceed 1 year. III. Regarding toxic gases, Article 7.4 of the \"GBZ/T 223-2009 Specifications for the Installation of Detection and Alarm Devices for Toxic Gases in Workplaces\" stipulates that such detection and alarm devices shall be regularly calibrated in accordance with relevant measurement requirements, with a calibration cycle of 1 year; this calibration period is consistent with that specified in Document No. 78. IV. T/CCSAS 015-2022 \"Procedures for the Safe Use and Maintenance of Gas Detection and Alarm Devices\" 6.2 Inspection During Use 6.2.1 In accordance with the relevant requirements of the calibration/profiling specifications, gas detection and alarm devices as well as the alarm systems should be inspected regularly during use. Inspection items and frequency include: a) zero point inspection, at least once every six months or when the zero point is found to be abnormal during routine checks ； b) Indication error inspection, at least once every six months or after out-of-range testing ； c) Response time inspection, at least once every six months or after out-of-range detection ； d) A comprehensive inspection of all functions of the gas alarm system shall be carried out at least once every six months. 6.3 Verification/Calibration 6.3.5 The verification/calibration cycle shall not exceed 12 months; for key positions subject to significant climate changes or harsh operating conditions, this cycle should be shortened, and instruments that have exceeded their designated verification/calibration period must not be used. 6.3.6 All tests/calibrations shall be accompanied by a result report issued by the testing/calibration laboratory, which shall be archived. 6.3.7 Each gas detection alarm shall have a unique identification and an indication of its calibration/status. V. The Revised List of Measuring Instruments Subject to Mandatory Control In order to continuously improve the business environment and fully implement the reforms related to streamlining administration and improving services, the State Administration for Market Regulation has decided to revise the list of measuring instruments that are subject to mandatory control. The revised \"Catalogue of Measuring Instruments Subject to Mandatory Control\" states that, first, the working measuring instruments listed in the Catalogue and for which the control methods are \"mandatory calibration\" or \"type approval along with mandatory calibration\" must undergo mandatory calibration during use. Secondly, other work measurement instruments are no longer subject to mandatory inspection; users can choose either non-mandatory inspection or calibration on their own. Third, the supervision method for products such as detectors (alarms) for toxic, harmful, flammable, and explosive gases is \"type approval,\" with mandatory calibration no longer being required. In summary, for gas detection alarms, calibration must be carried out at least once a year; a third-party professional agency can be invited to conduct the calibration and issue a test report, with local metrology offices no longer being responsible for mandatory calibration.

Annual verification, with tests every six months or every quarter