Regulatory Standards: Ensuring Compliance and Reliability

The design, installation, and operation of gas detection systems must comply with stringent domestic and international standards. Key regulations include:

(1) Domestic Standards

● GB 50493-2019 Design Standard for Flammable and Toxic Gas Detection and Alarm Systems in Petrochemical Industry:Specifies flammable gas alarm thresholds (≤25% LEL for primary, ≤50% LEL for secondary) and toxic gas thresholds (≤100% OEL for primary, ≤200% OEL for secondary); defines installation heights (e.g., 0.3–0.6 meters for heavier hydrocarbons).

● SY/T 6503-2022 Safety Standard for Flammable and Toxic Gas Detection in Petroleum and Natural Gas Projects:Addresses onshore oilfields, offshore platforms, and LNG terminals, adding requirements for oxygen (≤19.5% VOL alarm) and CO₂ monitoring, and standardizing laser-based detector selection for long-distance pipelines.

● AQ 3010-2022 Safety Code for Gas Station Operations: Mandates flammable gas audible/visual alarms in unloading and refueling zones, linked to dispenser shutdowns.

(2) International Standards (Reference)

● IEC 60079 Series (Explosion-Proof Electrical Equipment): Defines explosion-proof design requirements for gas detectors in hazardous areas (e.g., refinery units).

● ISA 12.13-2013 (Process Industry Gas Detection): Guides installation and maintenance of flammable/toxic gas detection systems.