Vapor tight definition

Vapor tight means equipment that allows no loss of vapors. Compliance with vapor-tight requirements can be determined by checking to ensure that the concentration at a potential leak source is not equal to or greater than 100 percent of the lower explosive limit (LEL) when measured with a combustible gas detector, calibrated with propane, at a distance of 1 inch (2.54 cm) from the source.
Vapor tight means a reading of less than 10,000 parts per million above background as methane when measured at a distance of one centimeter from the leak source with a portable hydrocarbon detection instrument. “Background” is defined as the ambient concentration of organic compounds determined at least three meters upwind from any equipment to be inspected and uninfluenced by any specific emissions unit.

Examples of Vapor tight in a sentence

Vapor tight, packless construction with all wetted parts made of brass and designed for mounting in pipe tee.


More Definitions of Vapor tight

Vapor tight means capable of holding an initial positive pressure of 18 inches of water column and a vacuum pressure of six inches of water column without a pressure change of more than three inches of water column in five minutes.
Vapor tight means equipment that allows no loss of vapors. Equipment is considered vapor-tight if the vapor concentration at a potential leak source is not equal to or greater than 100 percent of the Lower Explosive Limit when measured with a combustible gas detector, calibrated with propane, at a distance of 1 inch from the source.
Vapor tight means not capable of allowing the passage of gases at the pressures encountered.
Vapor tight means VAPOR-TIGHT: Ccapable of holding an initial positive pressure of 18 inches of water column and a vacuum pressure of 6 six inches of water column without a pressure change of more than 3 three inches of water column in 5 five minutes.
Vapor tight means a condition in which an organic vapor analyzer or a combustible gas detector at a potential VOC leak source shows either less than 10,000 ppm when calibrated with methane, or less than 20% of the lower explosive limit when calibrated and operated according to the manufacturer=s specifications.
Vapor tight means having the detection of less than 10,000 ppm hydrocarbon concentration, as determined by Method 21 in Appendix A of 40 CFR part 60, incorporated by ref- erence in s. NR 484.04 (17), at a distance of one inch from the source.
Vapor tight means a condition where an organic vapor analyzer or a combustible gas detector at a potential volatile organic compounds leak source shows less than ten thousand (10,000) ppm when corrected to gasoline vapor concentration, or less than one hundred percent (100%) of the lower explosive limit when calibrated and operated according to the manufacturer’s specifications.