Other sources of ignition

Electromagnetic radiation in the ultraviolet range or X-rays can form a source of ignition as well as acoustic waves, especially in the ultrasonic range. It is only a question of power density in the radiation field. 

---

Naked Flame or Other Source of Ignition Not Permissible Permissible Type ... 

Do not use an aerosoi spray when smoking, or near any other source of ignition, e.g. an eiectric fire, hot-piate, open-fiame heater or boiier etc. 

Risk of explosion by shock, friction, fire or other sources of ignition... 

Static electricity (static for short) has been blamed for many fires and explosions, sometimes con ectly. Sometimes, however, investigators have failed to find any other source of ignition. So they assume that it must have been static even though they are unable to show precisely how a static charge could have been formed and discharged. 

The first and third incidents are examples of hazards introduced by simple modifications (see Chapter 2). Many dust explosions caused by other sources of ignition are reviewed in Reference 10. 

Autoignition Temperature (AIT) The autoignidon temperature of a substance, whether solid, liquid, or gaseous, is the minimum temperature required to initiate or cause self-sustained combustion, in air, with no other source of ignition. 

Process areas are divided into two major types of environments XP and non-XP. XP, for explosion proof, means flammable materials (particularly vapors) might be present at certain times. Non-XP means that flammable materials are not present, even under abnormal conditions. For non-XP designated areas open flames, heated elements, and other sources of ignition may be present. 

A2 - Risk of explosion by shock, friction, fire or other sources of ignition A3 - Forms very unstable explosive metallic compounds A4 - External heating may cause an explosion A5 - May form explosive peroxides... 

EXTREME RISK OF EXPLOSION BY SHOCK, FRICTION, FIRE, OR OTHER SOURCE OF IGNITION... 

Hazards Use care when handling 30% hydrogen peroxide. Keep it away from alcohol, ethers, and acetates to avoid formation of dangerous peroxides. Use the standard warnings when using concentrated sulfuricacid. Acetone is flammable so avoid contact with flames, sparks, and other sources of ignition. 

---