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ChE Plus Newsletter Volume 3, Issue 2
MS Excel Spreadsheet
Contest, $100 Cash Prize!
The ABCs of Process Safety and Risk Management
Managing Wild Yeast Contamination in
Mr. Julian Taylor, owner and CEO of Rupture Pin Technology, invented the Buckling Pin Valve to solve the many problems that rupture disk users have come to accept as hassles of doing business. The ASME and API accepted Rupture Pin Valve offers accuracy, reliability, and dependability. It will allow higher working pressures for longer time periods without the fear of premature failure of the pressure relief devices.
The Rupture Pin Valve obeys Eulers Law of Compressed Columns to buckle a metallic pin that senses an axial force from a piston that senses system pressure. The pin will buckle precisely at set pressure allowing instantaneous full bore relief. The Rupture Pin Valve has only one moving part, the piston. It will maintain a bubble tight seal (ASME Class 6) until the set pressure is reached. ASME allows a variance of +5% from set pressure, but less than +2% is normally seen on actual valve certifications. The Rupture Pin Valve does not have the additional manufactures tolerance of +10% that the rupture disk is allowed. The pin is held in place with tight tolerance inserts and will never fatigue or be affected by pulsation. The pin has two stable conditions, straight or buckled - providing an excellent visual indicator.
Many companies using the Rupture Pin Valves have found the cost savings advantage over using a rupture disk, you can find a list of these companies on the Rupture Pin website. Also on the website is a Rupture Pin vs. Rupture Disk cost comparison MS Excel work sheet so you can estimate your savings.
While many companies are replacing rupture disks, Shell Offshore has found success with the Rupture Pin valve replacing conventional spring loaded pressure relief valves installed on high pressure positive displacement pumps. The pulsation created by positive displacement pumps will fatigue the springs in conventional pressure relief valves. Because the Rupture Pin Valve is immune to pulsation, Shell Offshore is installing the Model H Rupture Pin Valve on their chemical injection pumps. The set pressures on the valves are 15,000 psig and 9500 psig. Cost savings for Shell Offshore was quoted in the millions of dollars range!
Rupture Pin Technology is currently (April
2005 delivery) building a valve for NASA at the
By adding a small Rupture Pin Valve to your existing Pilot Operated valve, you can make the valve a fail open valve. This was the very first application for the Rupture Pin Valve. Contact Rupture Pin Technology for additional information if you are having problems with your pilot operated valves.
The Buckling Pin Valve, invented and manufactured by Rupture Pin Technology will have a larger initial investment than inferior pressure relief devices, but after installation of the Rupture Pin Valve, you may pick the day your return on investment is achieved; because that is the day you didnt have a premature failure.
The Rupture Pin Valve is custom made to solve individual problems. Rupture Pin Technology has made valves as small as 1/8 to 36 and pressure ranges from inches of water column to 15,000 psig. Rupture Pin Valves are in gas and liquid services all over the world, in all industries.
Determine how a pump will operate in a new duty by projecting a new curve based on the original curve. Great tool for changing the duty of a pump. Provided cortesy of Langley Ventures. Grab this free spreadsheet here.
We're looking for the best process engineering calcuation spreadsheets out there. Enter our contest and a chance to win a $100 prize! The spreadsheets will be judged on the following criteria:
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Problems at a Gas Processing Plant
"I'm working on a project where the
operations folks say that the devices they have at the inlet to a pair of recip
compressors are not effective. They have 2 parallel horizontal separators that seem
to do basically nothing (no liquid ever drains from these vessels), and a vertical
scrubber that I think is plugged. The latter has a vertical element, containing wire
mesh and vanes, a liquid collection pan, and a diptube to drain coalesced liquid to the bottom of the vessel.
The bottom should contain enough liquid to form a seal. Unfortunately, the bottom
is dry, and attempts to fill it with water have resulted in liquid slugs to the
compressors. Compressor maintenance has been a problem. Operations suspects
that some burnt glycol got into the system (perhaps pretty long ago) and has been slowly
sloughing off the pipes and equipment where it resides. Recently, gas production has been
accompanied with some very fine solids (referred to as "doughy"). We could
call it fine sand though some refer to it as clay-like. The gas contains very, very
little liquid normally, though there are wellhead drying systems at each well.
Upsets or misoperation could possibly generate liquids.
TANKJKT is one the best selling software titles in our online store, and it's little wonder. The author, Stephen Hall, based the program on years of experience in designing heat transfer systems with jacketed vessels and vessel with internal coils. The interface is extremely user-friendly and can be previewed here.
When you're ready to get your copy of TANKJKT,
you can purchase from the online store and download the software immediately.
Did you know that you can get a 10% discount on a variety of online CE courses offered by RedVector.com? Visit the CE Credit section of our online store for instructions. Remember, don't put the course in your "basket", use the link provided with each course description to order from RedVector.com.
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