sampling pipe

sampling pipe

[′sam·pliŋ ‚pīp]
(mining engineering)
A small pipe built into a seal to take air samples in a sealed area.
References in periodicals archive ?
When the exhaust was introduced into the sampling pipe, the gas and wall temperature decreased drastically.
After the soot particles and hydrocarbons settled on the inner wall of the sampling pipe, the type of lacquer formed depended on the temperature of the wall.
When considering half of the wall thickness of the sampling pipe as influencing area for sampling, the sampling area increases to 255 m[m.sup.2] ([empty set] 18 mm) or 3.3% of the 100-mm (4 in) pipe area.