scarg
Industrial
- Dec 14, 2001
- 25
I want to build a very cheap hydrostatic pressure testing aparatus for testing a simple 5" IPS vessel that is about 48" long with npt connection on top and bottom for inlet and outlet ports.
I am thinking that I can do this by using a 6" OD x .5" wall tubing by about 6" high, pipe with a 1/4" NPT fitting near the bottom for this "cylinder". I would also weld a plug in the bottom (ID of the tubing) to hold water and allow me to pressurize this "cylinder". I would run braided SS hose with 1/4" npt fittings to connect the "cylinder" to the vessel.
This I plan to preform in a "standard" 20 ton shop press that most any machine shop or factory would have a few of.
I plan to fill the above described "cylinder" with 3" of water (I don't want to deal with any type of oil) so as to leave enough room for a "piston" to pressurize the vessel by using the bottle jack to press down on the top of the "piston" at the top of the 20 tom shop press.
The piston would have 2 orings on it per standard oring spec's for hydraulic fittings (i.e. out of the Hercules Oring catalog) and I hope to read the resulting pressure on a gauge on the vessel. This is assuming the vessel I am testing is full of water before and below the piston and cylinder on the shop press.
Shouldn't this work if I use a bottle jack to "rachet" the piston down through the cylinder bore in a slow fashion?
I would like to get up to ~ 1,000 psi and hold it there for 5 minutes or so to test the welds on the vessel.
Thank you,
Steve
I am thinking that I can do this by using a 6" OD x .5" wall tubing by about 6" high, pipe with a 1/4" NPT fitting near the bottom for this "cylinder". I would also weld a plug in the bottom (ID of the tubing) to hold water and allow me to pressurize this "cylinder". I would run braided SS hose with 1/4" npt fittings to connect the "cylinder" to the vessel.
This I plan to preform in a "standard" 20 ton shop press that most any machine shop or factory would have a few of.
I plan to fill the above described "cylinder" with 3" of water (I don't want to deal with any type of oil) so as to leave enough room for a "piston" to pressurize the vessel by using the bottle jack to press down on the top of the "piston" at the top of the 20 tom shop press.
The piston would have 2 orings on it per standard oring spec's for hydraulic fittings (i.e. out of the Hercules Oring catalog) and I hope to read the resulting pressure on a gauge on the vessel. This is assuming the vessel I am testing is full of water before and below the piston and cylinder on the shop press.
Shouldn't this work if I use a bottle jack to "rachet" the piston down through the cylinder bore in a slow fashion?
I would like to get up to ~ 1,000 psi and hold it there for 5 minutes or so to test the welds on the vessel.
Thank you,
Steve