Air compressors are generally explosion-proof or non-explosion-proof

The choice of explosion-proof and non-explosion-proof air compressor must be strictly based on the safety risk assessment of the use scenario. There are no general standards, and the following principles must be followed.：

1. Application scenarios of explosion-proof air compressors

1. An environment where explosive substances are present
   • gas/vapour: Such as chemical workshops (solvent volatilization), oil and gas fields (natural gas leaks), pharmaceutical factories (organic solvents such as ethanol are used).
   • dust: Such as flour mills, metal processing workshops (aluminum powder, magnesium powder), coal storage (coal dust).
   • judgment basis: If the concentration of explosive substances in the air reaches 10% or more of its lower explosive limit (LEL), explosion-proof equipment must be used.
2. High temperature or spark risk areas
   • In welding work areas, painting booths and other places, electric sparks or high-temperature surfaces may ignite surrounding media.
3. Regulatory mandatory requirements scenarios
   • Places involving regulations such as the “Regulations on the Safety Management of Hazardous Chemicals” and “Explosion-proof Electrical Equipment for Explosive Environments” need to pass explosion-proof certification (such as ATEX, IECEx).

2. Application scenarios of non-explosion-proof air compressors

1. General industrial environment
   • Mechanical processing workshop (no flammable liquids/gases), automobile repair shop (non-painting area), logistics warehouse (no dangerous goods).
2. civilian sector
   • Places such as home garages and small studios without explosion risks.

3. Selection basis and decision-making process

1. risk assessment
   • Entrust a professional institution to test the concentration of explosive substances in the air to assess whether the explosion-proof requirements are met.
2. regulatory compliance
   • Check the safety regulations of your industry to clarify whether explosion-proof equipment is mandatory.
3. cost-benefit analysis
   • explosion-proof equipment: The initial investment is 30%-50% higher, and the maintenance cost is increased (regular testing of explosion-proof performance is required), but huge losses caused by explosion accidents can be avoided.
   • Non-explosion proof equipment: Suitable for low-risk scenarios and high cost performance.

4. Typical cases

1. Must choose explosion-proof cases
   • Due to the use of non-explosion-proof air compressors in a paint factory, solvent vapor was ignited by electric sparks, resulting in an explosion accident, with direct economic losses exceeding 2 million yuan.
2. Optional non-explosion proof cases
   • A mechanical processing factory uses water-based cleaning agents for workpiece cleaning without flammable substances. It uses non-explosion-proof air compressors. It has operated without safety accidents for 5 years.

conclusion: The selection of explosion-proof and non-explosion-proof air compressors must be based on scientific risk assessment and regulatory requirements, and cannot be generalized. Explosion-proof equipment must be used for high-risk locations, and non-explosion-proof equipment can be used for low-risk scenarios to reduce costs.