Classifying Explosion Prone Areas for the Petroleum, by W.O.E. Korver

By W.O.E. Korver

Content material:
About the author

, Page v

, Page vii

, Page 1
Chapter 1 - Flammable and flamable ideas of harmful products

, Pages 4-20
Chapter 2 - Classifying assets of hazard

, Pages 21-43
Chapter three - the level of explosion chance for NEC category I locations

, Pages 44-109
Chapter four - Spatial considerations

, Pages 110-123
Chapter five - The measure of explosion hazard for NEC classification II locations

, Pages 124-135
Chapter 6 - air flow requirements

, Pages 136-158
Chapter 7 - electric gear for NEC type I locations

, Pages 159-166
Chapter eight - electric apparatus for NEC classification II, crew F locations

, Pages 167-168
Chapter nine - Intrinsically secure gear and wiring

, Pages 169-170
Chapter 10 - set up of electric tools in unsafe locations

, Pages 171-173
Chapter eleven - Hydrogen gas

, Pages 174-175
Chapter 12 - Cathodic protection

, Pages 176-177
Chapter thirteen - Static electricity

, Pages 178-180
Chapter 14 - Grounding of tanks, pipelines, and tank cars

, Pages 181-184
Chapter 15 - Grounding specifications for electric equipment

, Pages 185-193
Chapter sixteen - software of seals in NEC type I locations

, Pages 194-210
Chapter 17 - software of seals in NEC classification II locations

, Pages 211-213
- Environmental stipulations in NEC classification I detrimental locations

, Pages 216-368
- program method for classifying NEC classification I locations

, Pages 370-402
Appendix - houses of flammable drinks, gases and solids

, Pages 403-410

, Pages 411-417

, Pages 418-420

, Pages 421-428

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Extra resources for Classifying Explosion Prone Areas for the Petroleum, Chemical and Related Industries

Sample text

Such a location must be classified Div. 1. d. Increasing wear If a process equipment is regularly operated or worked on, it means that mechanical wear will increase. Increase in wear is normally caused by excessive operations. The rate of wear is generally accelerated by high temperatures and high pressure in the system. Increasing wear will reduce life expectancy and eventually cause leakage and/or breakdown of the equipment. For example, valves being used for a prolonged period of time in a piping system for which classification is required, may start leaking when they are subjected to excessive opening and closing cycles.

An alarm should only be applied if the enclosed space requiting a non hazardous classification is located in a Div. 2 area. An enclosed space provided with an alarm system cannot be classified nonhazardous if it is located in a Div. 1 area. The space with an alarm can only be classified n o n hazardous if it is located in a Div. 2 area. ) The likelihood that during a ventilation failure ignitable gases or vapors will enter an enclosed space, is considered greater when the enclosed space is located in a Div.

The location must be considered highly dangerous because of the continuous presence of the flammable vapors in the air and because of this, the location must be classified Div. 1. b. Closed Sources of Hazard Frequently Leaking or Opened A location is also considered highly dangerous if ignitable concentrations of gases or vapors frequently exist in a location. Flammable gases or vapors are only frequently released into the atmosphere if a closed source of hazard is frequently or continuously leaking or frequently opened because of failure, malfunction or because of repair and maintenance.

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