Relief Systems · Intermediate · 1 day

Flare and Vent System Design (API 521)

Header hydraulics, knock-out drums, flare tips and radiation for new and modified disposal systems

Duration1 day
LevelIntermediate
FormatOn-site · virtual
CodeTR-C03
V-201 To flare Set 14.5 bargFire · blocked outlet
Course flyer

Flare and Vent System Design (API 521) — one-page catalogue.

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Flare and Vent System Design (API 521) — one-page course flyer
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Request this courseDownload the Training Request Form, quote course code TR-C03, sign and e-mail it to sales@cerasus.ai — or use the consultation form below.
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At a glance

What you will be able to do.

Process and project engineers designing or modifying flare and vent systems; relief engineers moving from single-valve sizing to the collection network

A correctly sized PSV discharging into an undersized header is still an unprotected vessel. This course covers the disposal side of relief: defining global scenarios, building the flare load summary, sizing headers for back-pressure and Mach limits, and designing the knock-out drum, seal, tip and stack so that radiation, noise and dispersion are acceptable. Participants build one complete flare network case from load summary to stack height.

  • Define global relieving scenarios (total power failure, cooling water failure, fire zones) and build a load summary
  • Size flare and vent headers for allowable back pressure, Mach number and noise
  • Design knock-out drums and liquid seals for the governing liquid load
  • Select flare tip type and estimate radiation, stack height and sterile radius
  • Check flashback, purge, air ingress and low-flow smoking conditions
  • Assess the impact of a new tie-in on an existing flare system
Course outline

Day by day

Morning

Disposal system philosophy and API 521 structure · global scenario definition and fire zoning · load summary and simultaneity · header hydraulics: back pressure, Mach, temperature and material limits · segregated wet, dry and acid headers

Afternoon

Knock-out drum and seal drum sizing · flare tip selection and radiation calculation · stack height, dispersion and noise · purge, flashback and smokeless operation · adding a new relief source to an existing network · worked case in CeraVent

Standards referenced
API 521
API 537
API 520 Part II
ASME BPVC Section VIII
NFPA 30
Request a consultation

Tell us about the unit and the problem.

Send a short brief — plant, service of interest and what you need to achieve — and a Cerasus engineer will respond with a proposed scope and next steps.

Prefer email or phone? sales@cerasus.ai · +974 5506 2743