FeatureBuilt · in the lab
Hydraulics and surge
Steady flow and water hammer on piping.
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. Hydraulics and surge is planned (roadmap row CH.10) as steady flow and water hammer on piping read from the model. A network solver exists in the lab and is shared with the flare header; no app uses it yet. It is also the planned follow-on for the networks engine.
Who it’s for
- Process and piping engineers sizing lines and pumps.
- Designers checking surge on a pipe.
What you can do
- Nothing works yet. Planned: liquid and gas network flow with pumps, check valves, control valves and fittings, velocity and Mach checks, available NPSH, compressor surge margin, and water hammer in a single pipe (CH.10).
Methods and standards
Planned: a global gradient method with Darcy-Weisbach friction, and the method of characteristics for water hammer. The same published algorithm already exists in the water mains work; folding them together is an open owner decision.
Data and sources
Pipe, fitting and pump data come from the model or your inputs. Fitting losses come from the 2-K and 3-K tables of the fitting-loss pack (a draft until an engineer has checked it against the papers).
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 reproduces Korteweg wave speed and Joukowsky surge against closed forms. The log says the typed tables and constants still need an engineer's check against the standards.
Limits
Not built: pump trip and start transients, transients across a whole network, column separation (only flagged), unsteady friction, two-phase flow, and compressor maps. Water hammer covers one pipe between a reservoir and a closing valve.
Files and formats
Planned: results on the model and in a 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
- Networks engine 700 KB
Adding it brings these too. Engines are shared: each downloads once for every add-on that uses it.
Needed by: Hydrogen and emerging fuels, Oil and gas (upstream, pipelines), Piping and plant design, Relief and flare.
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.