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The chemicals used to odorize pipeline gas are usually technical grade mixtures of thiols (mercaptans). These are usually added to the gas st ream at an odorizing station at a rate of approximately 1 pound or less per 106 (million) cubic feet. These compounds will react to some degree with the piping, depending upon what it is made of. I kno w copper piping has been used for this purpose in domestic construction and, if this is relatively new, may explain the loss of smell at the b urner. Running the burner while cooking (or whatever) should ‘ref resh’ the smell.
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Another possibility is that for an unknown reason, the concentration at the me ter is lower than it has been in the past.
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Pete
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Peter Lazarski
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From: DCHAS-L
Discussion List [mailto:DCHAS-L**At_Symbol_Here**list.uvm.edu] On
Behalf Of Jim Kaufman
<
span style='font-weight:bold'>Sent: Wednesday, April 08, 200
9
2:27 PM
To: D
CHAS-L**At_Symbol_Here**LIST.UVM.EDU
Subject: [DCHAS-L] Mercaptan in
Gas Suppy
Has anyone encountered the situation where the odorant smell from the burner gas supply changed when the gas was no t used for several months? If so, any explanation why?
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James A.
Kaufman, Ph.D.
President/CEO
The Laboratory Safety Institute (LSI)
A Nonprofit
International Organization for
Safety in Science and Science Educa
tion
www.LabSafetyInstitute.org
508-647-1900 Fax: 508-647-0062
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jim**At_Symbol_Here**LabS<
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