small pipe extending from the top to the bottom of a horizontal vessel
often required to prevent a vessel from collapsing under external pressure, or to prevent long, horizontal vessels from buckling under their own weight. If
allows for the connection of hooks or slings
attached at some conspicuous location on the vessel
most complex and expensive to maintain.
common than bubble cap trays due to their simplicity, low cost and minimal maintenance
changes the direction of flow or to promote the mixing of a fluid
A plate that maintains a certain liquid level on one side of a vessel.
used in vertical vessels to transport liquid from one tray to the tray below.
have two downcomers
have one downcomer per tray
required below the downcomer of the lowest tray to prevent vapours from bypassing through the downcomers.
also known as mist extractors or mist eliminators
They extract small droplets or particles of undesirable liquids from the gas stream that would otherwise carry over into the vapour stream as it leaves the vessel
an assembly using two crossed plates at the liquid outlet of a vessel to eliminate the vortex
a container having a design pressure between 15 psi and 3000 psi
sometimes called the can, ring or course belt.
indicates the longitudinal and circumference welds in hemispherical heads
indicates the welds of nozzle to vessel.
indicates the circumference welds in shell and joins to other heads.
indicates the welds to flanges.
usually referred to as flanged and dished
the distance between the tangent line of the head and the circumferential seam between the head and the shell
is not a pressure-holding part
Large or tall vessels may require a double base ring and
the most common support for horizontal vessels.
Spherical vessels, as well as some vertical vessels, are supported on
Nozzles may be located on either the shell or the head and may be connected either concentrically
reinforcing pads also known as
is required in each repad to ensure that no pressure is allowed to accumulate between the repad and the shell.
provide access for personnel to enter the inside of the vessel
must be used to hold up the flange while the manway is open because of the weight of the blind flange
a vertical appendage off the bottom of a horizontal vessel
allows a heavy liquid to separate from a lighter liquid
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