{"id":9390,"date":"2020-12-22T19:32:43","date_gmt":"2020-12-22T19:32:43","guid":{"rendered":"https:\/\/insulation.org\/?page_id=9390"},"modified":"2021-07-27T14:43:04","modified_gmt":"2021-07-27T14:43:04","slug":"personnel-protection-calculator-for-horizontal-piping","status":"publish","type":"page","link":"https:\/\/insulation.org\/training-tools\/designguide\/simple-calculators\/personnel-protection-calculator-for-horizontal-piping\/","title":{"rendered":"Personnel Protection Calculator For Horizontal Piping"},"content":{"rendered":"
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This calculator estimates maximum contact exposure times on the outer surface of a horizontal pipe insulation system based on the potential for contact burn injuries.<\/p>\n

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INSTRUCTIONS<\/h4>\n

(Input information may generally be be obtained from design documents or field measurements)<\/strong><\/p>\n

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  • Line 1. Select Nominal Pipe Size, NPS<\/li>\n
  • Line 2. Enter operating (process) temperature<\/li>\n
  • Line 3. Enter temperature of the air surrounding the pipe<\/li>\n
  • Line 4. Enter the wind speed of the ambient air (if unknown, use 0 mph for worst case conditions)<\/li>\n
  • Line 5. Select an insulation material<\/li>\n
  • Line 6. Select the effective emittance of the exterior surface<\/li>\n<\/ul>\n

    Note<\/strong>: Maximum contact times calculated via procedure from ASTM C 1055 (Fig 1, Threshold B- Reversible Epidermal Injury).<\/p>\n

    Note<\/strong>: Calculator does not screen for material temperature limitations - Use caution.<\/p>\n

    Note<\/strong>: Note NA = Not Available. Some sizes and thicknesses may not be commercially available and some materials are available in sizes and thicknesses not listed.<\/p>\n

    ASSUMPTIONS<\/h4>\n
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    • One dimensional, steady state heat transfer<\/li>\n
    • Base structure is a horizontal steel pipe<\/li>\n
    • Thermal conductivity based on ASTM Specification Values. Refer to the introductory notes for further clarifications.<\/li>\n<\/ul>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div><\/div>\t\t