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Gas System Safety & Best Practices: Initial Lit Review

Gas System Safety & Best Practices: Initial Lit Review. Warburton 2013.10.22. Approach. Be aware of standard practices and safety principles now or ASAP To the extent possible: Minimize “reinventing wheels” Seek official published advice Always: Safety First!

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Gas System Safety & Best Practices: Initial Lit Review

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  1. Gas System Safety & Best Practices: Initial Lit Review Warburton 2013.10.22

  2. Approach • Be aware of standard practices and safety principles now or ASAP • To the extent possible: • Minimize “reinventing wheels” • Seek official published advice • Always: Safety First! • These slides: constitute an initial record of links/info

  3. Initial Literature Search • Mostly NIMA (Nuclear Instruments and Methods in Physics Research A) • Content primarily performance-oriented • Much design and safety documentation is local to technical reports within the major labs

  4. Natural Choice: Check CERN First • More readily specific to our application than generic industrial sources • Where necessary, we must be prepared to reconcile with local (McGill/QC/CDN) practices • CERN Safety Rules Pages: • Home page: http://safety-rules.web.cern.ch/safety-rules/documents2/home_doc.html • Chemical, Cryogenic and Biological Safety: http://safety-rules.web.cern.ch/safety-rules/documents2/Chemical_Biolo_Cryo.html

  5. Comments on CERN Safety Rules • Over last decade or so: altered to align with EC’s “European Regulations and Directives” • Relevant to our work: “General Safety Instruction GSI-C2: Explosive Atmospheres” (see https://edms.cern.ch/file/1113408/LAST_RELEASED/GSI-C2_E.pdf) • Item 3 in the above document mentions that it supersedes a previous “Flammable Gas (Safety Code G)” (see https://edms.cern.ch/document/335730/2.01)

  6. Flammable Gas Safety Manual • 79 pages, Annex A of superseded Flammable Gas Safety Code G • Since Code G is no longer in force, its Annex A must be used with caution (for information only) • Have not yet found a current/official analogue • It is the most useful doc I’ve found so far… • Link (accessed 2013.10.22) [see TOC]: http://safety-commission.web.cern.ch/safety-commission/safetyplan/flammgasman-e.pdf

  7. Sections of Note (Flamm. Gas Safety Manual) • 14.3 (p. 32), Gas Mixers, 2nd paragraph: “the higher the temperature [liquid n-pentane] the greater the take-up of the vapour from the liquid” -> Idea: maintain reservoir slightly above room temp? • Annex A2 “Typical Examples of Gas Mixing and Distribution Systems”, Figs. 1, 2, and 4

  8. Generic Single-Pass System, with Liquid Evaporation

  9. Remarks • CERN doc’s look useful and relevant • Need to be cognizant about the currency of these doc’s, as well as local rules • We appear to be on the right track • More detailed look is needed

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