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CISDOC database

Document ID (ISN)111363
CIS number 11-0083
Year 2008
Convention or series no. HSE RR635
Author(s) Dowker K.P., Hardwick K.
Health and Safety Executive
Title Effect of tubing type on gas detector sampling systems
Bibliographic information HSE Books, P.O. Box 1999, Sudbury, Suffolk CO10 2WA, United Kingdom, 2008, vi, 25p. Illus. 6 ref.
Internet access HSE_RR635.pdf [in English]
Abstract This study was designed to determine the effect of polytetrafluoroethylene (PTFE), fluorinated ethylene propylene (FEP) and Tygon tubing on the response times of the detection systems used to monitor hydrogen sulfide (H2S), nitrogen dioxide (NO2), nitric oxide (NO) and toluene (C7H8). Findings are discussed. It is concluded that PTFE and FEP can be used with minimal effect when sampling H2S, NO and NO2. Tygon may be used when sampling H2S, NO and NO2 if PTFE and FEP are not available providing the delay time is not an issue, but the tube dimensions must be as small as practically possible without restricting the flow rate of the sampling instrument. Tygon is not suitable for use in sampling C7H8 but PTFE and FEP may be used providing the delay time is not an issue.
Descriptors (primary) United Kingdom; fluoroethylene polymers; silicone rubber; sampling and analysis; detector tubes; materials testing
Descriptors (secondary) nitric oxide; nitrogen dioxide; hydrogen sulfide; benzene; toluene; reliability; report
Document type E - Books, reports, proceedings
Country / State or ProvinceUnited Kingdom
Subject(s) Toxic and dangerous substances
Broad subject area(s) Chemical safety
Browse category(ies) Air pollution