Recent questions tagged industrial-instrumentation

Description : Why Is Flow Measured In Square Root?

Last Answer :  Flow varies directly as the square root of different pressure F = K square root of ΔP.  Since this flow varies as the square root of differential pressure the pen does not directly indicate flow.  The flow can be determined by taking the square root of the pen. Say the pen reads 50% of chart.

Description : How Will You Vent Air In The D.p. Cell? What If Seal Pots Are Used?

Last Answer : 1. Air is vented by opening the vent plugs on a liquid service transmitter. 2. On services where seal pots are used isolate the primary isolation valves and open the vent valves. Fill the line from the transmitter drain plug with a pump.

Description : How Do You Calculate New Factor From New Range Using Old Factor And Old Range?

Last Answer : New Factor = _!New Range Old Factor = _IOld Range Flow = K_!Range Q = Factor X Unit Flow New Factor = Old Factor I _IOld Range X _/New Range.

Description : How Would You Do Glycol Filling Or Fill Seal Liquids In Seal Pots 7 Draw And Explain?

Last Answer : The procedure for glycol filling is : 1. Close the primary isolation valves. 2. Open the vent on the seal pots. 3. Drain the use glycol if present. 4. Connect a hand pump on L.P. side while ... 9. Close the seal pot vent valves. 10. Close equalizer valve. 11. Open both the primary isolation valves.

Description : How Do You Do A Zero Check On A D.p. Transmitter?

Last Answer : Close one of the valve either H.P. or L.P. open the equalizing valve. The O/P should read zero.

Description : An Operator Tells You That Flow Indication Is More? How Would You Start Checking?

Last Answer : 1. First flushing the transmitter. Flush both the impulse lines. Adjust the zero by equalizing if necessary. If still the indication is more then. 2. Check L.P. side for choke. If that is clean then. 3. Check the leaks on L.P. side. If not. 4. Calibrate the transmitter.

Description : How Do You Carry Out Piping For A Different Pressure Flow Transmitter On Liquids, Gas And Steam Services? Why?

Last Answer : Liquid lines: On liquid lines the transmitter is mounted below the orifice plate. Since liquids have a property of self draining. Gas Service: On gas service the transmitter is mounted above the orifice ... mounted below the orifice plate with condenlate pots. The pots should be at the same level.

Description : What Is The Seal Liquid Used For Filling Impulse Lines On Crude And Viscous Liquid?

Last Answer : Glycol.

Description : How Do You Calibrate A D. P. Transmitter?

Last Answer : The following steps are to be taken which claribrating : 1. Adjust zero of the Xmtrs. 2. Static preasure test: Give equal pressure on both sides of the transmitter. Zero should not shift. If ... pressure to high pressure side of the transmitter and adjust the span.  Adjust zero again if necessary.

Description : How Do You Identify The H. P. Side Or Inlet Of An Orifice Plate In Line?

Last Answer : The marking is always done H. P. side of the orifice tab which gives an indication of the H.P.side.

Description : What Is Bernoulli’s Theoram And Where It Is Applicable?

Last Answer : Bernoulli’s theoram states the “total energy of a liquid flowing from one point to another remains constant.” It is applicable for non compressible liquids.

Description : Why Is The Orifice Tab Provided?

Last Answer : The orifice tab is provided due to the following reasons: 1. Indication of an orifice plate in a line. 2. The orifice diameter is marked on it. 3. The material of the orifice plate. 4. The tag no. of the orifice plate. 5. The mark the inlet of an orifice.

Description : How Do You Identify An Orifice In The Pipe Line?

Last Answer : An orifice tab is welded on the orifice plate which extends our of the line giving an indication of the orifice plate.

Description : What Are The Different Types Of Orifice Plates And State Their Uses?

Last Answer : The different types of orifice plates are: 1. Concentric. 2. Segmental. 3. Eccentric. CONCENTRIC: The concentric orifice plate is used for ideal liquid as well as gases and steam service. This orifice ... hole in the form segment of a circle. This is used for colloidal and sherry flow measurement.

Description : What Are The Primary Elements Usedfor Flow Measurement?

Last Answer : The primary elements used for flow measurement are: 1. Orifice Plate. 2. Venturi tube. 3. Pitot tube. 4. Annubars. 5. Flow Nozzle. 6. Weir & Flumes.

Description : Define All The Process Variable And State Their Unit Of Measurement?

Last Answer : 1. FLOW: Kg I hr, Litter I min, Gallon I min. M3 I NM3 I HR. (GASES) 2. PRESSURE: Force acting per unit Area. P = F/A Units: Bar I Pascals I Kg I CM I, Pounds 3. LEVEL: ... Degree Farenheit, Degree Kelvin, Degree Rankin. 5. QUALITY: It deals with analysis PH, % C02, % 02, Conductivity, Viscosity.

Description : What Are The Process Variable?

Last Answer : The process Variable are: 1. Flow 2. Pressure 3. Temperature 4. Level 5. Quality i. e. % D2, C02, PH etc.