BACK TO CATEGORIES Photo ID: 1196 (Click photo to view original size.) Category: Fire Hazard: Burned Standard Violated: 1910.253(b)(4)(iii) Corrective Action: Separate the cylinders while in storage a minimum distance of 20 ft. or by a non combustible barrier at least 5 ft. high having a fire resistance rating of at least 1/2 hour. Description: Hazard: Acetylene and oxygen cylinders stored together