What are the fire-resistance rating requirements for compressor rooms, and what standards govern them?

Fire Hazard Analysis of the Air Compressor Room

During operation, air compressors generate high temperatures, and their internal components and piping typically contain a certain amount of lubricating oil. If the equipment is aged, improperly maintained, or experiences electrical malfunctions, it can easily ignite and lead to a fire. Therefore, the fire-resistance rating of the air compressor room directly determines whether fire spread can be effectively contained in the event of a fire, thereby ensuring the safety of personnel and equipment.

Main standards serving as the basis for fire-resistance rating requirements

The fire-resistance rating design and acceptance of compressor rooms are primarily based on the current national building fire‑protection codes. The key reference standards include:

• Code for Fire Protection in Building DesignThis is a fundamental national standard for fire protection design in industrial and civil buildings, specifying the classification of fire hazards for various types of factory buildings and the corresponding requirements for fire-resistance ratings.
• Code for Design of Compressed Air Stations: Specific technical requirements are set forth for the process, architecture, and electrical systems of compressed air stations, including detailed guidance on fire protection for machine-room buildings.
• Local Fire Safety Technical Guidelines: In some regions, more stringent local fire safety standards for industrial buildings will be promulgated, tailored to the specific local conditions.

Classification of Fire Hazards and Definition of Fire-Resistance Ratings

According to the relevant standards, the fire hazard classification of an air compressor room typically depends on the media it uses and the characteristics of its equipment. In general, air compressor rooms that use mineral oil for lubrication are usually classified as having a fire hazard level of…Class DorCategory C(Depending on the flash point of the lubricant and its storage quantity.)

Specific requirements for fire-resistance ratings:

• Single-story or multi-story factory buildings: Typically, the fire resistance rating is required to be no lower thanLevel 2This means that the main structural components of the computer room—such as columns, beams, floor slabs, and load-bearing walls—must be constructed from non-combustible materials and meet the corresponding fire-resistance rating requirements.
• High-rise factory buildings or basements: If the air compressor room is located within a high-rise industrial building or in the basement, its fire-resistance rating must meet more stringent requirements and typically needs to reachLevel 1, and higher‑level fire‑separation measures must be implemented.

Fire-resistance rating of building components and fire separation

To meet the applicable fire-resistance rating, the building components of the air compressor room must satisfy the following basic requirements:

• Load-bearing walls and firewalls: Non-combustible walls shall be used, with a fire-resistance rating of no less than 3.00 hours, to effectively prevent the spread of fire to adjacent areas.
• Floor slabs and roof load-bearing members: Non-combustible materials shall be used, and the fire-resistance rating shall meet the requirements of at least 1.50 hours for Class I or at least 1.00 hour for Class II, depending on the specific fire-resistance classification.
• Fire-resistant doors and windowsDoors connecting the computer room to other areas shall be Class A or Class B fire doors and shall open in the direction of evacuation. Cable trenches and pipe penetrations through walls must be tightly sealed with fire‑stop materials.

Fire Protection System Configuration and Daily Management

In addition to the fire-resistance requirements for the building itself, the air compressor room must also be equipped with comprehensive fire protection systems:

• Fire suppression system: Depending on the data center’s floor area and fire hazard level, portable or wheeled dry‑powder fire extinguishers and carbon dioxide fire extinguishers shall be provided. For large‑scale or high‑risk data centers, it is recommended to install an automatic water‑sprinkler system or a gaseous fire‑extinguishing system.
• Alarm and Smoke Exhaust: An automatic fire alarm system shall be installed, and adequate natural ventilation shall be maintained or mechanical smoke-exhaust systems shall be provided to prevent the accumulation of high temperatures and toxic fumes.
• Daily Management: Regularly clean oil stains and combustible debris from the equipment room, and strictly prohibit the unauthorized storage of flammable and explosive materials. Conduct routine inspections of electrical wiring and compressed-air system pipelines to prevent leaks, spills, and drips.

Compliant Design and Secure Operations

The fire-resistance rating of the air compressor room is a critical component in the design of industrial plant buildings. During both the planning and construction phases, it is essential to strictly adhere to current national fire safety codes; drawings must be prepared by a qualified design firm and approved through fire‑safety review before construction may proceed. Only by closely integrating building fire protection with routine safety management can robust safety safeguards be ensured for the enterprise’s continuous production operations.