Search found 31 matches

by luca
16 Aug 2026, 15:43
Forum: Operation Engineers
Topic: Fractionation efficiency and operating pressure
Replies: 3
Views: 2359

Fractionation efficiency and operating pressure

An effective way to improve a distillation tower fractionation efficiency is to reduce the tower’s operating pressure.
But what that reduction in operating pressure would cause? What are the other factors to be considered?
by luca
02 Aug 2026, 07:22
Forum: Electrical & Instrument Engineers
Topic: PST of ESD
Replies: 4
Views: 2704

Re: PST of ESD

For Emergency Shutdown (ESD) valves, the Partial Stroke Test (PST) interval is not fixed by any international standard. The testing frequency is determined by the required SIL, reliability calculations, failure rates, manufacturer's recommendations, and the site's proof test philosophy.
Typical ...
by luca
27 Jul 2026, 10:55
Forum: Electrical & Instrument Engineers
Topic: Detecting drifting transmitters
Replies: 7
Views: 6278

Re: Detecting drifting transmitters

These are some of the few ones:
1. AMS Device Manager
Plants with Emerson instrumentation
Device diagnostics, calibration records, predictive alerts, valve diagnostics
2. FieldMate
Yokogawa-based plants
Device configuration, diagnostics, offline/online maintenance
3. FieldCare
Endress+Hauser ...
by luca
27 Jul 2026, 10:48
Forum: Maintenance Engineers
Topic: Inorganic Zinc Silicate
Replies: 2
Views: 2106

Inorganic Zinc Silicate

Why inorganic zinc silicate is preferred for coating of newly constructed assets whereas zinc rich primer is recommended for in-service ones?
by luca
23 Jul 2026, 18:17
Forum: Process & Control Engineers
Topic: Fireproofing of PSVs
Replies: 3
Views: 2702

Re: Fireproofing of PSVs

Some facilities require equipment to remain functional for 30 minutes, 60 minutes, 120 minutes, depending on evacuation philosophy.
If a PSV is needed to continue relieving pressure during prolonged fire exposure, fireproofing may help preserve its mechanical integrity.
by luca
23 Jul 2026, 18:13
Forum: Open Forum
Topic: Web based applications
Replies: 3
Views: 4949

Re: Web based applications

Windows installation packages are pretty much needed as many of the popular engineering applications still get installed locally.
I would say a word of caution when using cloud based applications.
Data security is of major concern and with AI now a days, breaches are even much common.
by luca
12 Jul 2026, 07:25
Forum: Electrical & Instrument Engineers
Topic: LOPA or QRA
Replies: 3
Views: 3274

Re: LOPA or QRA

I would first verify whether the scenario fits LOPA assumptions—a single initiating event with independent protection layers and independent failures. If the multiple failures involve dependencies, common-cause failures, cascading events, or complex consequence interactions, I would recommend a ...
by luca
12 Jul 2026, 07:24
Forum: Electrical & Instrument Engineers
Topic: Voting Arrangement
Replies: 2
Views: 2579

Re: Voting Arrangement

1oo2 is usually preferred when:

The hazardous event develops very quickly.
Missing a real demand is considered less acceptable than an occasional nuisance trip.
The process can be restarted easily.
Capital cost is a significant constraint.
SIL calculations show it adequately meets the required risk ...
by luca
08 Jul 2026, 15:09
Forum: Electrical & Instrument Engineers
Topic: Detecting drifting transmitters
Replies: 7
Views: 6278

Re: Detecting drifting transmitters

Asset management software helps in picking up the following parameters:
Calibration history
Device diagnostics
Failure history
Drift rate
Sensor health
Environmental conditions
They can predict like, "This pressure transmitter will exceed calibration tolerance in 4 months."
This is predictive ...
by luca
20 Jun 2026, 10:13
Forum: Electrical & Instrument Engineers
Topic: Servicing of Control Valves
Replies: 4
Views: 6278

Re: Servicing of Control Valves

Practically, these are the historical maintenance records as we pull out before each opportunity.
Data leads such as repeated packing failures, frequent seat leakage, recurring actuator problems, multiple work orders over recent years, repeat offenders usually deserve priority attention.
Pretty ...