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Unformatted text preview: o grade) is an action to
consider. When this cannot be done, precautions should be taken which
limit damage when the material eventually does fall to grade.
Also, inadvertent operation of ¼ turn drain valves has occurred in many
facilities, this example is for falling snow/ice. Other causes include :
inadvertent contact with moving objects (hoses, people, ladders or
materials), vibration, etc. Experience indicates that round handles are an
effective means to prevent a number of releases. Many locations have also
adopted a practice of installing a mechanical plug (or blind flange) in all
valve openings, which could allow release of a hazardous material. AIChE © 2001. All rights reserved. Reproduction for non-commercial, educational purposes is encouraged. However,
reproduction for the purpose of resale by anyone other than CCPS is strictly prohibited.
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- Spring '13