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Number Of Rupture Discs On Tube Side

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#1 go-fish


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Posted 27 March 2021 - 06:21 AM

I have a compressor intercoolers which has HP fluid shell side - wet hydrogen and LP fluid tube side - cooling water. We have discussed all options of eliminating full tube rupture scenario and in the end concluded we have to design for tube rupture.

HP shell has DP of 47 barg and LP tube has DP of 10 barg. I would like to know what determines the number of rupture discs if I am not doing any dynamic simulation. Which of the following options should I select:

1. Provide 1 x 100 % disc on the cooling water return line.

2. Provide 2 x 50 % discs i.e. one on cooling water supply line and one on cooling water return line.

#2 Pilesar


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Posted 27 March 2021 - 04:04 PM

I'd be inclined to calculate the credit for the atmospheric vent at the end of the cooling water return line. If I still needed a rupture disc to a flare, I think I would be more comfortable with two 100% discs in series to avoid the problems that would occur with a premature disc failure. Do you think full tube rupture is a reasonable scenario? If both of your options adequately address the scenario, then choose the cheaper option.

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