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Vent stack

Vent Stacks

Vertical devices for safe non-combustion discharge of defined gas streams where permitted by the design basis.

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Vent-stack section during fabrication
Vent-stack section during fabrication

Purpose

Discharge gas at the engineered elevation while meeting dispersion, noise and hazardous-area requirements.

Arrangement and integration

Equipment functional diagram

The diagram identifies the principal process duties, equipment connections and product handover points. Final scope, redundancy and battery limits are established from project data.

Vent stackVent stack functional diagramFunctional diagram
Vent Stacks: Vent stack functional diagramPackage boundaryVent or reliefgasLiquid knockoutVent stackDispersion tipDischarge atdesignelevation
Gas

A typical equipment arrangement is shown. Final execution, redundancy and valve scope are established during engineering.

Engineering basis

Design parameters

Final ratings, materials and supply scope are established from project-specific operating data.

Relief compositioncomposition, liquid and solids content
Relief ratescontinuous, intermittent and emergency cases
Pressure and temperatureat the package boundary for each case
Safety basisradiation, dispersion, noise and separation distances

Process functions

Principal process duties

  • Gas discharge at a safe elevation
  • Drainage and liquid-ingress prevention
  • Pressure control and electrical bonding

Typical scope

Main equipment

  • 01

    Main process vessel or package

  • 02

    Skid, supports, platforms and piping

  • 03

    Valves, instrumentation and protection systems

  • 04

    Insulation, heat tracing, shelter and electrical systems as required

Questionnaire

Data required for engineering

Worked examples and vessel-volume fields are retained. Use them as guidance or provide parameters from an existing design.

Vent stack questionnaire
  1. 01

    Process fluid and physical properties

  2. 02

    Flow, pressure and temperature for all cases

  3. 03

    Required process result and allowable pressure drop

  4. 04

    Materials, climate and installation category

  5. 05

    Dimensional constraints, battery limits and automation requirements

Proposal request

Operating data for a technical and commercial proposal

Attach the completed questionnaire or provide the principal operating data below. Equipment scope, design ratings and battery limits follow engineering review.

Email the questionnaire, specification and attachments

Related scope

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