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  1. insp76

    Brinell readings acceptable highs and lows for Refinery heater tubes

    Thanks for the response, yes we have thickness measurement history and we strapped the tubes as always. The biggest concern is softening and the loss of tensile strength beside the thinning . If the HRB is 79 and equals a Brunell of 143 the tensile strength is down to about 47K much less than...
  2. insp76

    Brinell readings acceptable highs and lows for Refinery heater tubes

    Concerning the base metal at suspected flame impingement areas of Heater tubes, are there acceptable Brinell hardenss limits, high and low for safe operation. I would like to know the acceptable high and low limits or good Engineering practice for 1.25cr, 5 cr and 9 cr tubes in refinery service...
  3. insp76

    Brinell readings acceptable highs and lows for Refinery heater tubes

    Concerning Heater tubes, are there acceptable Brinell hardenss limits, high and low for safe operation. I would like to know the acceptable high and low limits or good Engineering practice for 1.25cr, 5 cr and 9 cr tubes in refinery service. Any help would be appreciated, thanks.

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