Example of Design Fault in a Chemical Plant.
Today I am going to show you a real fault when a piping design was done in a hydrogen per oxide plant. In a common practice we build a control loop for controlling a fluid flow through a control valve and if any problem happens to your control valve in a running plant what you will do? I suggest you must not shut the plant and keep the production smooth that time. So what action should take that time? If the control valve some how not work open the bypass manual valve from field side and close both upstream and downstream manual valve of a control loop. A typical hand drawing is showing how you do it. But now I suggest you connect bypass valve after the downstream valve. If you connect after long distance from downstream valve this will harmful for your plant. Don’t connect after a elbow and after downstream valve. See The hand sketch: Another suggestion is given to you when you making a piping you must a have manual valve after and before a control valve and all these set up wi...