How to protect the safe operation of gas stations with flameproof lighting fixture? Comprehensive analysis and application program

First, why must gas stations use professional flameproof lighting fixture?

Gas station as a flammable and explosive places [gasoline vapor explosion limit of 1.4%-7.6%], ordinary lighting equipment in the static buildup or circuit failure may cause deflagration accident.

Professional flameproof lighting fixture approved flame retardant engineering plastics [oxygen index ≥ 32] and cast aluminum explosion-proof shell combination, with triple overload care mechanism, can reduce the probability of electrical ignition source caused by accidents by 87% [according to the NFPA 30B guidelines test data], is the mandatory safety configuration of hazardous places lighting.

Second, flameproof lighting fixture 6 core technology guidelines

1. Composite explosion-proof structure: Ex d IIB T4 explosion-proof certification + IP66 protection level, to prevent the penetration of oil and gas and control the internal explosion energy.

2. Dynamic temperature monitoring: Built-in PT100 temperature sensor, automatically start the secondary cooling system when the shell temperature reaches 85℃.

3. Antistatic surface treatment: surface resistance value is controlled in the range of 10^6-10^9Ω (in accordance with IEC 60079-0 guidelines), eliminating the risk of static electricity ignition.

4. Emergency lighting system: 0.3 seconds after the interruption of the main power supply to switch to the backup power supply, continuous power supply ≥ 120 minutes

5. Corrosion-resistant coating: Approved for 720 hours salt spray test nano-ceramic coating, resistant to oil vapor corrosion

6. non-sparking wiring design: spring-loaded compression terminals, to avoid sparks caused by tool collision during installation.

Third, the key areas of gas station lighting program design

1. refueling operation area

Installation of anti-glare fireproof floodlighting lamps and lanterns [80-150W], equipped with tempered glass prismatic diffuser, vertical illuminance ≥ 200lux, horizontal uniformity of 0.7 or more

2. oil storage tank area

Explosion-proof fireproof searchlight [Ex d IIC T6 certification], equipped with microwave sensing module, personnel enter the automatic lifting to 100% brightness

3. convenience stores and office areas

The use of fire emergency integration of flat panel lights, color rendering index Ra>90, color temperature 4000K, in line with GB 50034-2013 commercial lighting guidelines

Fourth, the purchase of gas station flameproof lighting fixture 5 core indicators

1. Double certification system: must hold the national explosion-proof electrical certification [CNEx] and the international IECEx certification.

2. Material test report: Require the supply of shell material GWFI [Scorch Wire Flammability Index] ≥ 960 ℃ test certificate.

3. Protection performance verification: 72 hours of sealing test in the simulated oil and gas environment, internal humidity change ≤ 3% RH

4. Light decay control: 6000 hours of continuous operation at 55 ℃ ambient temperature, luminous flux maintenance rate ≥ 95%.

5. Convenience of maintenance: Requirements with no cover high-speed replacement of light source design, single maintenance time ≤ 15 minutes

Fifth. Installation specifications and safety management points

The horizontal distance between the lamps and the fuel dispenser is ≥4.5m [refer to GB 50156-2021 specification] The cable introduction port adopts the double thread explosion-proof structure, with the silicone rubber sealing ring compression device every month to use the combustible gas detector to check the oil and gas concentration around the lamps and lanterns within the range of 0.5m Quarterly to clean up the heat dissipation fins of the oil pollution, the use of pH-neutral special cleaning agent is strictly prohibited in the state of the equipment is electrified to carry out any dismantling operation.

FAQ：flameproof lighting fixture in gas station common questions

Q1：Difference between flameproof lighting fixture and ordinary explosion-proof lamps?

A：Fire-proof type focus on blocking the internal circuit fire to the outside, approved GB 3836.1-2021 guidelines; explosion-proof type of primary to prevent the intrusion of external explosions to meet the requirements of GB 12476.1. Gas stations should be selected with double protection characteristics of the product.

Q2：How to verify the fire performance of lamps and lanterns on site?

A: Suppliers are required to implement the burning wire test demonstration: 850 ℃ nickel-chrome wire contact lamps and lanterns non-metallic parts for 30 seconds, to observe whether to produce sustained combustion [Qualification guidelines: self-extinguishing open flame within 30 seconds].

Q3: How to prevent leakage of electricity in rainy season?

A: Select the model with double insulation structure [Class II labeling], and ensure that the grounding resistance value <0.1Ω. It is recommended to install a 30mA leakage protector.

Q4: How long is the equipment replacement cycle?

A: In the average daily working conditions of 18 hours, high-quality fire lighting should ensure: zero failure in the first 3 years, 5 years of light decay ≤ 8%, advocating the implementation of the sixth year of the overall safety assessment.