What does LDT stand for (used in context with PFD, P&ID)? 1

[DeltaCascade]

Thank you in advance for comment.

What would the acronym LDT stand for?

This regards an RFP that refers to preparation of PFD (process flow diagrams), P&ID's (piping and instrumentation diagrams), and LDT's. Coudn't find LDT on my favourite acronym website either.

http://www.acronymfinder.com//noacronym.asp

Cheers

Wayne

 

[MortenA]

Level Differential Transmitter ?

If a DP cell is used for level measurement then maybe somebody figured that LD was more appropriate (or if the level is not absolute with reference to the bottom)?

Best Regards

Morten

 

[DeltaCascade]

Thank you, Morten. It's appears likely that the original author may have made a typographical error ... such is the downfall of acronym use (or overuse?). Just wanted to make sure I wasn't missing something...
Cheers//

 

[redford]

LDT refers to Line Designation Table. Design pressure, temperature, line size, line schedule are input into this format.

 

[MortenA]

I think wayne may be right even though i always called it a line list (and have seen "schedule" somewhere)

Best Regards

Morten

 

[DeltaCascade]

Ahaa!! Ureka!

Line Designation Table! That's the "thing" I like to see on the bottom of my PFD's! Yeah, the line list. Now I can see why folks may like to have it separate from PFD's, so as not to clutter PFD's ... and they call it an LDT.

Thank you very much!

 

[saxon]

According to the ANSI/ISA standard for letter callouts,
measured variable position L stands for level, modifier position D is differential or users choice, output fuction T stands for transmitter. Since the Second position D is users choice. The following could be true, LDT is a "level displacement transmitter" or it could be a "level differential transmitter". There ought to be a legend around somewhere that spells this out for you.

If in doubt, call the Instrument Eng. Group to decode for you.

 

[DeltaCascade]

Thank you, Saxon. It is useful to be aware of the ISA (and ANSI, too? tx) letter callout standards.
It turned out that what I had was indeed a line designation table or line list or line schedule.
A day doesn't go by without learning something

 

[MortenA]

its all very fine with the stanard but theres a LOT of companies out there (but in the US and elsewhere) who dosnt follow standards (be they american or any other )

The original post didnt tell you exactly where the agronym way foudn. I initially misunderstood it and though it was on a drawing but i think that was cleared in a later post.

Best regards

Morten

 

[saxon]

Morten, We just keep it simple and call it a line list. Also, it's separate from the PFD's/P&Id's. Although the P&ID/PFD lines have a line number which can be back referenced to the "Line List".