Unbalanced force determination around a critical surge relief system has illustrated what I've considered to be unreasonable. I'm interested to discuss this with other SR Engineers that may have faced this issue. The currently designed system sketch is attached. The classical calculations...
Gentlemen, all of the comments have been greatly appreciated and excellent comments for which I've thoroughly agreed with most all the made. Meter skids have long been purchased by our client, are in process of being installed and I've not agreed to seal the design. The solution that we will...
I absolutely agree with the CTM response as it should go open (valve is a fisher V150), however the client instructed the automation team to close the valve on any downstream valve movement since the spec break PCV valve is slower that the CTM PCV and the CTM is much closer to the nearest...
In this system the Tank Valves are Gate valves with a 2.5 minute closing, flow does not reduce until the last 5-10% of stroke so the PCV upstream of the meter can solve this without issue as long as the CTM check valve remains open to the pressure wave. In the manifold 12 butterfly valve close...
The computer program is DNVL's Synergy Pipeline Simulator, alias Stoner Pipeline simulator, alias Drem Pipeline Simulator, alias SSI Intercomp TCON. I've been using it since 1974 and a Senior Specialist using this technology, At one time the program was the only DOT approved software for...
This system is a multitude of storage facilities (tanks feed by 3rd parties anywhere from a few thousand feet to a mile away. Each facility has an incoming pig receiver and most have a PCV at the receiver just inside the facility fence and (in most cases with a few exceptions) also serves as the...
The meter skid does have a check valve immediately on the skid at the exit of the skid. The surge is too fast (3500 ft/sec) thru the system and doesn't close the check valve (which is good otherwise the pressure would jump from 35-40 psi to about 500 psi. Client wants a mechanical stop on the...
The BTF is 200-800 feet away in a tank manifold that feeds several tanks. There is an MOV at the tank that could close. Meter skids require a back pressure valve to prevent flashing in the meter. The BTF is for cutting off a manifold run to specific tanks and not designed for holding back...
The pressure wave is coming from a closing butterfly valve and the only valve faster is the CTM backpressure valve, the limit stops are to prevent the CTM valve from completely closing and setting off a secondary pressure wave. The CTM back pressure valve would be commanded to close by...
The surge is coming from downstream, the product is crude oil, the client is proposing to put limit stops on the back pressure control valve so it does not fully close, but closes ahead of the surge wave thereby sending a rarefaction wave downstream reducing the surge impact. My position is...
In 40years of experience I've never considered (or seen) a CTM back pressure control valve used to mitigate a surge event. My question, is there anyone out there that have or would consider using a CTM back pressure control valve to mitigate s surge. I've real issues with this and question the...
