brtsvg
Member
- Location
- Davenport, IA
This question pertains to a typical open factory floor, enclosed environment scenario.
By definition the C1D2 zone boundary extends 25 ft radially out horizontally from the source producing hazardous vapor fumes (at the center of the C1D1 zone), and up to 3' above the grade. Viewed from above this is circle with 25' diameter, with the unclassified zone anywhere beyond the D2 zone boundary.
Is it acceptable to effectively move the D2 zone boundary inwards some amount by installing a vertical continuous subwall extending up from the floor a minimum of 3' high such that any potentially hazardous vapors that can collect near the floor would be blocked from further outward travel ? (thus effectively contained) This is an idea similar to what is common practice for large outdoor petroleum storage tanks which all have a containment control berm around the tank to catch any liquid leakage or rupture from escaping further away.
We are seeking to install a piece of large industrial equipment on a factory floor in a location now determined to fall about 7' inside the D2 zone outer boundary. This equipment is not designed for operation in a D2 zone, and modifications to become compliant to do so may be complicated and very expensive. For us a much simpler solution may be facilities-related (making the D2 zone smaller) rather than machine-design-related.
Are there any P.E.s that could provide an opinion here ? thanks
By definition the C1D2 zone boundary extends 25 ft radially out horizontally from the source producing hazardous vapor fumes (at the center of the C1D1 zone), and up to 3' above the grade. Viewed from above this is circle with 25' diameter, with the unclassified zone anywhere beyond the D2 zone boundary.
Is it acceptable to effectively move the D2 zone boundary inwards some amount by installing a vertical continuous subwall extending up from the floor a minimum of 3' high such that any potentially hazardous vapors that can collect near the floor would be blocked from further outward travel ? (thus effectively contained) This is an idea similar to what is common practice for large outdoor petroleum storage tanks which all have a containment control berm around the tank to catch any liquid leakage or rupture from escaping further away.
We are seeking to install a piece of large industrial equipment on a factory floor in a location now determined to fall about 7' inside the D2 zone outer boundary. This equipment is not designed for operation in a D2 zone, and modifications to become compliant to do so may be complicated and very expensive. For us a much simpler solution may be facilities-related (making the D2 zone smaller) rather than machine-design-related.
Are there any P.E.s that could provide an opinion here ? thanks