what the differant between Wet Leg /Dry Leg

Question Posted / mohd.tech

2 Answers
27116 Views
Sepam Group, I also Faced
E-Mail Answers

Answers were Sorted based on User's Feedback

what the differant between Wet Leg /Dry Leg..

Answer / www.islamqa.com

They are diffrential pressure transmitter "installation
technique" used in "level measurement"

When installing diffrential pressure transmitter we attach 2
impulse lines with high & low transmitter sides, the 1
attached to low side is empty impulse line so it is "dry
leg" or it's filled with a sealing liquid with density
greater than the process liquid so it is "wet leg".

We use "dry leg" for closed pressurized tank.

We use "wet leg" for closed pressurized tank also but if we
have the probability of process liquid condensable vapor
which will give a faulty measurement.

If we have an open tank, the Tx low side is atmospheric.

Regards,

Ahmed Sabry
Control and Instrumentation Engineer
GPC - General Petroleum Company
CELL.: 00 2 0121367310
ahmedsabry.onine@gmail.com

Is This Answer Correct ?

33 Yes

0 No

what the differant between Wet Leg /Dry Leg..

Answer / heri santoso

Dry and Wet leg are process connection of dp cell level
instrument used in close tank
(Wet leg)Where leg impulse connection of tx contained fill
(difference SG)with process fluid in tank.fill is a
parameter reading of tx tranduser
(Dry leg)where leg impulse connected to atm no fluid in leg
connection

Thanks

Is This Answer Correct ?

3 Yes

11 No

Post New Answer

More Instrumentation Interview Questions

1)What is the suitable MOC for flow meters working at temperature between 200 - 250 cen. 2)In which application the mass flow meters are not advisable 3)Is it advisable to use radiation type or radar type instrument for non contact application

1 Answers

How will you calibrate PID controller? explain with example.

0 Answers Jacobs, Sirte Oil Company,

how is work pressure switch& level switch?what is the principle of this?

0 Answers Binani,

The document / drawing that is primarily used in depicting the “Bill of Materials (BOM)” of piping system is the

2 Answers

What types of thermocuple are mostly used?

6 Answers

WE ARE HAVING YOKOGAWA CENTUM CS 3000 DCS, 2 FCS AND 4 HIS " When the operation Download to HIS message appears: Equalize start. HIS0163 WARNING: Could not connect to equalize destination. (7001) Retrying. Number of retries = 0/1 ERROR: LdXopsLoadMain: connect error 10060 ERROR: LdXopsLoadMain: connect error 10060 ERROR: Processing terminated due to connection error. (7002) Equalization end with errors. HIS0163 ---- ERROR = 3 WARNING = 1 ---- Tell me, please, why and how to solve the problem."

6 Answers Khas Pvt Ltd, Yokogawa,

how to calibrate steam control valve in steam turbine

0 Answers

What skill/s does the Instrument Technician has?

6 Answers

what is the current pay package for an instrumentation engineer having 2 years of experience in cryogenic technology???????

1 Answers

Draw block digram for well head from well to shipping pump?

0 Answers

Sir i am preparing for PSU exam for ONGC but i am not able to get the appropriate syllabus and previous year question papers. Kindly send me the same, that will be a great help from ur side. OR if anyone can plz send me the papers and syllabus please.

11 Answers Bhel, GAIL, IOCL, ISRO, NTPC, ONGC,

We have yokogawa cs3000 one fcs and 4 his. After download to his, showing successfully at es, but not transferred to his.

1 Answers Shyam Steel,

For more Instrumentation Interview Questions Click Here