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  1. EthanolBlending83

    Ethanol Tank Venting

    Hi, I'm building 3 ethanol storage tanks, and need some advice for venting design. The tanks were design by API 650 without internal floating roof. The designer required a PVR valve to keep the tank isolated from water vapor in air. The site is very humid we reach normally 80 - 90% RH trouhg...

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