Please provide information about Straight run requirement of Orifice plate. Please share your experience whether TEE can be installed at the upstream of Orifice plate within 5D , as there is no space.
No, its not recommended. If there is constraint of upstream piping, use conditioning orifice plate. But check you might not get the required Beta.
Has anyone experienced a PSV installed horizontally on a liquid line?
Actually we are in a situation where it is not possible to install PSV vertically due to space constraint. I have only witnessed horizontal installation in some pump outlets only. Is there any relevant standard that supports horizontal installation?
Usually standards suggest vertical installation. Exceptions can be found in relevant PSV manuals eg. Leser PSVs. Thats correct, you can ask directly to PSV supplier, otherwise there is no harm in horizontal installation.
I have found following exceptions, which allows non upright installation:
How to boost converter. Actually, I need to connect pulser from flow meter whose output pulses are 5V where as the controller works on 12V. Any idea or piece of equipme t that I can put between pulser and controller for 5V to 12V conversion? Model of flowmeter ERP 200 Liquip.
As a quick solution to this problem, you may use a 5V interposing relay and a 12 V power supply connected to its NO Auxiliary contacts.
So whenever your flowmeter such as a Vortex generates pulses then they may be step up on the aux side.
Do check the switching time of the relay and pulses frequency in this case.
The best way to boost is you need SCR relay in between along with 12vdc power supply that you could biased on PLC input. Like found 1 relay of finder manufacturer. Solid State Relay………… 1 No contact ; 6V input..(4.8V – 6.6V)..output switching 1.5 to 33V Dc
Manufacturer of K type thermocouple.
- Wika
- Thermo Electric
- Yamari Japan
Confirm on which basis, leakage of class v calculated per psi differential pressure.
FCI 70-2 or API 598 are the standards.how can one test a serial port. We have an ABB PLC which sometimes stops sending data until after a day or more then you find data starts coming to the PLC / SCADS
ABB DC’s 800 not supporting modbus fully.
Normally every plc has testing feature loopback for serial port, it will come when you take plc online normally there is a option in other brands of plc. This happens sometime, check the resistance, sometime we have to put resistance 120 ohms both ends
What is the design standard for building Management System?
SAES-K-011, in Saudi Aramco Standards.
What is standard instrumentation for the Gas Turbine, on which loops we required 2OO2 or 2OO3 tripping, what will be the SIL level?
Over speed trip relays are 2oo3.
The Installed Pressure Transmitters are Ex’ ia’ certified it can be installed in Zone-0/1/2… Please clarify as to whether this statement is true. If true please refer to the relevant standard.
This is Basic Intrinsic safety even Wikipedia can help you in that
Standard is 60079
And yes the statement is true.
What type of valve is this? And how it operates?
It’s pnumetic switching valve. It’s work just like relay but it’s pnumetic relay. Double acting solenoid valve. For pneumatic supply.
Hi, there are two SOVs controlling the pneumatic valve. Each pneumatic pilot side denotes what will be the satus of ports or how they will be connected. Also think of it directiof connection and flow. Used for loading unloading compressor. Its not complicated. You just have to consider the electric, pneumatic and hydraulic circuits and how they integrated.
Double acting solenoid… follow diagram on valve for each load and unload operation…if load, straight arrows means P – B & T-A. Check coil operation if on pulse or dc/ac.
i think if load pneumatic signal is there through the SOV (a) pilot will be pushed causing port P to be open through port B /and port T to be open through port A. while if unload signal is there then (b) pilot will be pushed causing port T to be open through port B/ andqa port P to be open through port A.
Have any came across pneumatic fail last valve? Is pneumatic control valve drifting possible?
Other solution is
As per my understanding, throttling is not possible with pneumatic valves, they are just on & off. I have read some where that it is achievable through double acting actuator. It is possible by using pneumatic trip relay. U can use a lock up relay to hold the valve at last position. Pneumatic valves can be used for throttling via positioners.
You can open and close the on off valve in steps, this I have seen in loading arm application. However it is not considered a valve throttling. Fail last means it is a double acting actuator so drifting can be achieved by using double acting positioner such DVC.
For fieldbus instrument selection, is it required FISCO approval for installation in utilities area of plant?
But it depends on your requirements if you want to away from bundle of cables in DCS panel ( I am talking about profibus PA)
Which company of Pakistan provide best services for SIL Study?
- Vanguard Solution
- Engineering Tech Services
- Velosi
- HIMA Engineering
This is a circuit of compressed air line, where line size is 200mm and is reduced to 80mm for strainer, conditioner and FT installation. If the section with DN80 piping is sufficient for required flow, why don’t we use DN80 piping for the overall circuit? Explain?
It is pretty obvious that which flowmeter you choose depends on the application. For example, someone said “Coriolis for liquids; ultrasonic for gas.” This is a good answer, since Coriolis meters do a better job on liquids than gases. This is because liquids are denser than gases, and liquids have more inertia to modify the motion of an oscillating tube than gases do. Also, ultrasonic meters are well known for their ability to handle custody transfer of natural gas. But how about for applications where both are qualified? One example is measurement of liquids through a 4-inch pipe. Another example is hydrogen measurement. Some people have a strong preference for one technology over the other. Which do you prefer – Coriolis or ultrasonic, and why?
Does any standard defines error limit/range for test equipments? I need to know what percent of error is within tolerance level of standard.?
It depends on your application and process parameters you are measuring. I don’t think any standard dictates the accuracy requirements. For example, the temperature measurement in the furnace requires high accuracy but not for the pipeline temperature measurement. Again, if you have temperature pressure compensated flow measurement, then you need high accuracy in temperature measurement.
This means the accuracy level defined in data sheet of test equipment is to be taken as reference for any deviation? For example, if i have fluke document calibrator, its accuracy defined in data sheet is to be taken as reference for validation?
Tou can only find the accuracy requirements in company standards, not in international standards.
However, if you talk about fiscal measurement, the API MPMS dictates the accuracy classes.
If you have a high-pressure trip, e.g, in 1oo1 or in 2oo3, I recommend considering Rosemount 3051, and if you have a high-pressure indication and process alarm for the any pipeline I must select Rosemount 2051.
This is designed location for control valve installation (infront of pillar), but due to space constraint, we may have to relocate this control valve to green marked location. With flow direction from left to right, would there be any implications of this relocation? Case Shown in above picture
What is the service, pressure, dp across valve? Just for an idea the valve installation can sometimes be a bit on angle from perpendicular position. Instead of this | you can go like this / upto 80 deg from ground or 10 deg from pillar should not be a problem for most services.
You can keep the distance 2xD (D is diameter of pipe) from the curve.
I support this solution provided that it doesn’t compromise your maintenance access. You can install control valve with its actuator in a non-vertical position. Consider additional supports if you are installing it in a way that actuator is horizonal or near the horizontal axis.
Vertical actuator is a best practice but there is no harm if you tilt it to meet your requirement.
Actuators of control valves are rotatable so if the concern is the postioner etc of control valve becoming non accessible for operation/maintenance then rotate the actuator to as per requirement (if local technicians cant do it ask the valve vendor), however please arrange the gasket as once you open the bolts and connect back , gasket may not be reuseable. I have done this for a similar case.
Otherwise, moving the valve slightly shouldn’t have much issues, the only challenge you may face is that once the valve be relocated, it will directly be facing piping elbow, which will pose more dp and may create more bubbles. There is a 3rd silution too, that is to move the valve slighly away from pillar ( instead from left to right, in vertical direction away from pillar). In such case you may need to rotate existing pipe spool from the point of manual valve and add 2 more elbows.
How about rotating the actuator, if that seems feasible.
Q.
Can someone please suggest how should I tackle a problem.
Transformer is feeding to 4 different switch-rooms that have around 30 to 40 drivers each, including free gpo and lights for each room.
If I need to add an extra load/drive in one of the switch-room, how can I determine if transformer has enough capacity or not.
The only way I can see is calculating current of all the drives connected ( for each room) including power sockets and lights. And calculate maximum demand and ensure system will not trip by adding a new load in one of the room
Will this be the right way, this is in australia BTW.
Ans: Are all loads energized and drawing current all the same? If yes then your working will work otherwise we take 0.8 of all such connected loads it is based on probability that all connected loads might not be in operation all the time. A simple cost benefit analysis.
Take data of incomer current for a day and from there you can analyse load on transformer.
Rather then a day, maybe trends for a month ? And max current drawn over the period.
What would be the maximum starting and operating current of all devices if being energized at the same moment? it rarely happens. However, the worst-case scenario is considered to avoid overloading of feeder, it is good advise above, to check past few weeks trend of how much total current draws from feeder and evaluate available capacity, still you can’t use all spare load and you need to check allowable limit to left over for safe operation of transformer and avoid overheating.
Are there any spare breakers on the respective switchroom available? If yes, then the probably transformer is sized for that breaker capacity as per design.