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Copyright © 2007 Fluor Corporation

Horizontal Vessels

Lesson Objectives:

Lesson Objectives

Know the basic mechanical function of horizontal vessels.

Know how to calculate and fill out the Fluor standard Nozzle Chart.

Know how to show nozzles and related callouts on the piping isometric and plan

drawings.

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Horizontal Vessel Or Accumulator

What is a Horizontal Vessel??

A horizontal drum or accumulator is a drum located in horizontal position

with usually no internals

Horizontal vessels are used to collect the overhead product from a

fractionating tower. The overhead product is condensed and is transmitted

back to the fractionation tower from which the fraction came. This liquid is

referred to as the reflux.

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Horizontal Drum On PFD:

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Horizontal Vessel(Accumulator)

Nozzles Names:

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Typical Horizontal Reflux Drum

VAPOR OUT

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Vessel Nozzle Nomenclature:

Fluor uses a system of nozzle names and corresponding letters to make it easier to

identify the nozzles.

The names usually indicate the nozzle function.

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Drum Minimum Height Requirement Shown On P&ID

SET BY

PROCESS

INSIDE BOTTOM OF VESSEL

HPFS

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Sample:Saddle-supported Drum

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Drum Elevation Sketch:

See Piping Design Guide for Complete Instructions

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Drum Locations In An Enclosed Chemical Plant Structure

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Horizontal Drum Shown On

Piping Plan

Vessel headline distance from the pipeway is established by the unit supervisor

and is shown on the plot plan.

The locating coordinate in the other direction might not be established for some

time. Several studies in the adjacent areas will have to be done before we can

establish coordinates for our L.C.P. (Location Control Plan)

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Nozzle Block Chart

Number Or Description - Nozzle connection will be identified by alphanumeric

system. (See vessel nozzle symbols)

Size And Rating

Elevation – Either centerline or Face of Flange

Centerline Coordinate - The centerline coordinate or Face of the nozzle.

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Nozzle Block Chart For Drums

EQUIPM.NUMBER

OR

DESCRIPTION

SIZE

AND

RATING

CENTERLINE

ELEVATION

(OR AS NOTED)(OR AS NOTED)

CENTERLINE COORDINATE

NORTH EAST

NOZZLE BLOCK CHART

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Elliptical Head

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Ladders And Platforms

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Ladders And Platforms

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Horizontal Drum

REFERENCE: Shell Goal Venture - Geismar Plant

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Horizontal DrumSide View

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Horizontal DrumAerial View

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Horizontal DrumFront View

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Horizontal DrumFront View

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Questions??

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Exercise PI-E11C

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