Recent content by collism

I am trying to find out if there is a good rule of thumb for the maximum filling rate in a floating roof tank? I know for static discharge you want to keep below 3 ft/s, but we were thinking there has to be a limit to keep the roof from getting hung up, ect. Has anyone heard of any guidance...

Thank you!!!

I have a document about resetting a vacuum vent on a sphere that refers to the MEP of the vessel. In this case the set pressure of the vent is 1.5 oz/in^2 which they say the required inbreathing capacity is still vented below the MEP of the vessel of 2.0 on/in^2. I would assume it is like the...

Does anyone know the requirements for sample bombs, particularly including dip tube requirements and usage? Valve requirements on sample bombs and stations? Expected safe normal working pressure and service life of a 1900 pound rupture disk? Maintenance and documentation requirements...

We have an atmospheric storage tank storing Heavy Naptha that was converted from a cone roof to an internal floating roof a while back. It has hard pipe up to the top of the tank (where you can hook up foam in case of a fire) that leads into a box with this coiled up hose in it. The idea is...

Good idea, will do.

We have an atmospheric storage tank storing Heavy Naptha that was converted from a cone roof to an internal floating roof a while back. It has hard pipe up to the top of the tank (where you can hook up foam in case of a fire) that leads into a box with this coiled up hose in it. The idea is...

Is there a requirement for size & reinforcement for cutting doorsheets in tanks? I have looked through API 620, 650 & 653 and have not found anything except for distance from welds & HAZ. I am looking at cutting a 6 ft x 8 ft doorsheet in the second shell ring of a 144 ft diameter by 40 ft...

I am looking at installing a mixer on a standard tank manway opening. We have several mixers in service currently, but they are all on tank nozzles. I can't find any guidance from API 650 or 653. The mixer vendor has calculations, but they only take into account the stress at the weld...