Hydraulics

Overview

We run node-by-node hydraulic calculations for sprinkler and manual systems to establish flows, pressures, and residual margins. Outputs are compiled into insurer- and authority-friendly reports with clearly labelled assumptions, supply data and results — aligned to ASIB, NFPA, and relevant SANS codes.

What We Deliver

Calc grids, design densities and remote area selection
Friction loss, K-factors, equivalent lengths and C-values
Node reports: pressures/flows at each calc point
Pipe sizing and optimisation for safety margin
Demand vs. supply curve comparison and summary
Approval-ready hydraulic calculation report

Inputs & Assumptions

Supply data (pump curve / static & residual tests)
Hazard classification and design area selection
Fittings, devices and hose stream allowances
Temperature/head spacing constraints
Water supply reliability and contingency

Compliance & Review

ASIB Rules & directives
NFPA 13 / 14 / 20 methodologies as applicable
Relevant SANS and municipal requirements
Peer review and insurer/AHJ submissions

Demand vs. Supply

Curves prepared from pump tables or hydrant test data with documented assumptions.

Node Report Excerpt

Per-node pressures and flows, including worst-case checks and safety margins.

Typical Process

01. Data & Scope

Collect supply data, hazard classification, head layout and system constraints.

02. Grid & Assumptions

Define remote area, allowances, and calc grid; select C-values and K-factors.

03. Run & Optimise

Run calculations, refine pipe sizes, and check worst-case margins.

04. Document

Compile reports: node tables, curves, assumptions and summary results.

05. Review

Issue approval-ready pack for consultant, insurer and authority review.

06. Finalise

Address comments, update revisions and issue final calculation set.