Rumara Engineering

Steam temperature consideration for column operating under vacuum

Operating a column under vacuum is typically for following scenarios1. Low temperature constraint due to Heat sensitive material2. Lowering of high boiling component boiling point Learning:So, while operating a column under vacuum with vertical thermosiphon reboiler one should carefully decide steam temperature and pressure required at reboiler inlet flange-based process side conditions and not at …

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Credibility of administrative controls to prevent a blocked outlet scenario for PSV Sizing

Can an overpressure scenario of a blocked outlet be avoided if the valve is a LO (Locked Open) valve? It agrees with common logic that the scenario should not be applicable since the valve will be locked open with a padlock. There would be no possibility of overpressure because the valve will always be kept …

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PUMP MINIMUM CONTINUOUS FLOW

Minimum continuous flow provision will safeguard centrifugal pumps against the following two major consequences.1) Mechanical integrity:- A pump in block condition will result in high differential pressure which will lead to,· Excessive noise & vibration· Overheated casing internals· Probability of seal failures.· Shaft misalignment or damage.2) Thermal Impact:- Due to block condition, overheating of fluid …

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Isolation Methods

Positive isolation methods are those that provide a safe environment for performing maintenance, repair or replacement operations on process facilities. These isolations remain effective even if there is an equipment failure or operator error.There are many ways of isolating equipment. Each offers different levels of security. They include:·Level 1 Closed Valve·Level 2 Closed Valve with …

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