Open flames, electric arcs, hot slag, sparks, and metal spatter are ready sources of ignition. Sparks from cutting, particularly oxyfuel gas cutting, are generally more hazardous than those from welding because the sparks are more numerous and travel greater distances because they are propelled by the oxygen or air stream used in the cutting process. Isolation or protection of combustibles is essential, for they may be exposed to sparks that fall through holes, cracks, or other openings. If those sparks retain heat for a sufficient time, they might ignite combustibles. Managers at DOE facilities undergoing deactivation need to ensure that vendors subcontractors understand local work control practices and the importance of following safety requirements.
Several publications provide guidance on welding and cutting safety and on reducing fire hazards.
The following publications contain many general and specific recommendations and should be consulted by supervisors of welding and cutting operations. It states that worker protection is an important element of any project. Section 12 of the handbook states that extra precautions are required for worker safety because hazards in the facility may be unknown and many activities are infrequently performed. Where relocation is impracticable, combustibles shall be protected with flameproofed covers or otherwise shielded with metal or asbestos guards or curtains. American National Standards Institute Standard Z49.1, Safety in Welding, Cutting and Allied Processes, covers all aspects of safety and health in the welding environment, emphasizing oxygen gas and arc welding processes.