FeatureBuilt · in the lab
Relief and flare
Relief scenarios, valve sizing, flare headers.
Use this add-on:
Screenshots and a short video come with the listing (AL.3).
Overview
Planned. This add-on is not built and no host app mounts it. Relief and flare is planned (roadmap row CH.12) as relief scenarios, valve sizing and flare header checks tied to the P&ID and the HAZOP. A sizing library exists in the lab; no app uses it yet.
Who it’s for
- Process safety engineers who size relief devices.
- Process engineers checking a flare header.
What you can do
- Nothing works yet. Planned: relief area for gas, liquid and two-phase flow, fire heat input, trapped liquid expansion, tube rupture, orifice letter selection, an inlet loss check, a flare header as a gas network, and flare radiation distance (CH.12).
Methods and standards
Planned after API 520 and API 521 by clause, including the omega method for two-phase flow. The flare header runs on the hydraulics solver.
Data and sources
Scenarios and fluid data are your inputs; scenarios are meant to come from the HAZOP (CH.14). The orifice areas and fire constants were typed into the library and are marked for an engineer to check.
Verification
Planned: no add-on test yet. The engine library behind it has a test, tools/process-test/test-equip.mjs, which the session log chem-equip_PART_3 records as 119 passed, 0 failed on 2026-10-28. It compares the gas coefficient and fire constants with the published values to within the tolerances the log gives. The log says the typed tables and constants still need an engineer's check against the standards.
Limits
Not built: steam relief, rupture disc combinations, outlet and reaction forces, depressuring, flame length, several flares at once, a load summary per header, and the P&ID hook that sets the valve tag. Sizing is a study aid, not a certified valve selection.
Files and formats
Planned: a relief valve data sheet and a scenario report. Nothing is written today.
Get started
- Nothing to open yet. The add-on is planned and cannot be added.
- Watch the roadmap row named in this listing for when it is built and enters the lab.
Languages
No languages are listed for this add-on yet. Its maker may add some.
Works in
| Edition | Works | Note |
|---|---|---|
| Browser (/use) (yours) | Added on demand | Fetched the first time you use it, then kept for offline use. |
| Studio from getcadcraft.com | Added on demand | Fetched the first time you use it, then kept for offline use. |
| Microsoft Store | Added on demand | Fetched the first time you use it, then kept for offline use. |
| Google Play | Added on demand | Fetched the first time you use it, then kept for offline use. |
| iPad and iPhone (App Store) | Included; switch it on | Part of the reviewed app; your list switches it on. |
| Custom build | Added on demand | Fetched the first time you use it, then kept for offline use. |
Comes with
- Hydraulics and surge Size when built
- Networks engine 700 KB
- Process engine 2.5 MB
Adding it brings these too. Engines are shared: each downloads once for every add-on that uses it.
Needed by: Hydrogen and emerging fuels, Process safety engineering.
Versions
| Version | Channel | Date | What changed |
|---|---|---|---|
| 1.0.0 | lab | October 31, 2026 | First version in the Library. |
Licence and maker
CadCraft (CadCraft, first-party). Licence: Apache-2.0. Dependencies carry their own licences, listed on their pages.