NFPA 655: Standard for Prevention of Sulfur Fires and Explosions

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Reduce the risks for sulfur fires and explosions with the expanded edition of NFPA 655: Standard for Prevention of Sulfur Fires and Explosions.

Use the essential steps and requirements outlined in the 2012 NFPA 655 to eliminate or reduce hazards encountered in the crushing, grinding, and pulverizing of bulk and liquid sulfur. NFPA 655 also prescribes the safe handling of all forms of sulfur, including ground sulfur and molten sulfur.

This edition introduces an alternative means for determining where in a facility a combustible dust hazardous condition exists. It also clarifies how to choose between prescriptive or performance-based options when applying NFPA 655.

Other changes help you understand and correctly address hazards.

  • Clarification of the dust layer depth criterion for determining whether a combustible dust hazardous condition exists
  • New housekeeping requirements addressing the hierarchy of cleaning methods and the frequency of housekeeping based upon rate of accumulation of combustible dusts
  • Added requirements for employee training; and new rules applicable to contractors and subcontractors
  • Added PPE for flash fires, selected according to NFPA 2113: Standard on Selection, Care, Use, and Maintenance of Flame-Resistant Garments for Protection of Industrial Personnel Against Flash Fire
  • Annex B illustrating how to apply the methods for determining existence of combustible dust hazardous condition
  • Added Annex text explaining protection strategies against static electrical ignition concerns where intermediate bulk containers (IBC) are used for sulfur storage and transport

Improve safety -- order the 2012 NFPA 655 today. (Softbound, 25 pp., 2012)

NFPA® 655 Standard for Prevention of Sulfur Fires and Explosions 2012 Edition

Chapter 1 Administration
1.1 Scope
1.2 Purpose
1.3 Retroactivity
1.4 Equivalency
Chapter 2 Referenced Publications
2.1 General
2.2 NFPA Publications
2.3 Other Publications
2.4 References for Extracts in Mandatory Sections
Chapter 3 Definitions
3.1 General
3.2 NFPA Official Definitions
3.3 General Definitions
Chapter 4 Handling Solid Sulfur in Bulk
4.1 General
4.2 Identification of Deflagration Hazard Areas.
4.3 Building Construction
4.4 Electrical Wiring and Equipment
4.5 Inert Gas
4.6 Conveyors and Collectors
4.7 Prevention of Ignition
4.8 Intermediate Bulk Containers for Solid Sulfur
4.9 Fire Fighting
Chapter 5 Handling of Liquid Sulfur at Normal Handling Temperatures
5.1 General
5.2 Detection of Unsafe Conditions
5.3 Equipment Design
5.4 Open Flames and Sparks
5.5 Fire Fighting
Chapter 6 Handling of Liquid Sulfur and Sulfur Vapor at Temperatures Above 309°F (154°C)
6.1 General
6.2 Operating Precautions and Equipment Design
Chapter 7 Fugitive Dust Control and Housekeeping
7.1 Fugitive Dust Control
7.2 Housekeeping
Chapter 8 Training and Procedures
8.1 Employee Training
8.2 Plan
8.3 Initial and Refresher Training
8.4 Certification
8.5 Contractors and Subcontractors
Chapter 9 Inspection and Maintenance
9.1 General
9.2 Specific Equipment Maintenance
Annex A Explanatory Material
Annex B Dust Layer Characterization and Precautions
Annex C Informational References