516.3(B)
(4)For open dipping and coating operations,all space within a 1.5-m(5ft)radial distance from the vapor sources extending from these surfaces to the floor.The vapor source shall be the liquid exposed in the process and the drain-board and any dipped or coated object from which it is possible to measure vapor concentrations exceeding 25 percent of the lower flammable limit at a distance of 305 mm(1ft)in any direction from the object.
(5)Sumps pits or below grade channels within 7.5 m(25ft)horizontally of a vapor source.if the sump pit or channel extends beyond 7.5m(25ft)from the vapor source,it shall be provided with a vapor stop or it shall be classified as class 1,division 1 for its entire life.
(4)For open dipping and coating operations,all space within a 1.5-m(5ft)radial distance from the vapor sources extending from these surfaces to the floor.The vapor source shall be the liquid exposed in the process and the drain-board and any dipped or coated object from which it is possible to measure vapor concentrations exceeding 25 percent of the lower flammable limit at a distance of 305 mm(1ft)in any direction from the object.
(5)Sumps pits or below grade channels within 7.5 m(25ft)horizontally of a vapor source.if the sump pit or channel extends beyond 7.5m(25ft)from the vapor source,it shall be provided with a vapor stop or it shall be classified as class 1,division 1 for its entire life.
No comments:
Post a Comment