NFPA in USA

Engineering work procedure

Fire Pump Sizing Workflow

Screen fire pump flow, pressure, elevation, and horsepower before detailed pump selection and curve review.

Guide workflow

Follow the sequence as an engineering workflow: each phase lists the action, tools, and evidence to retain before moving forward.

PhaseActionToolsEvidence to keep
Step 1Define sprinkler and hose demand.Fire Pump Rated Flow and Pressure CalculatorDocument the source used to start the Engineering workflow.
Step 2Determine required discharge pressure at the pump.Fire Pump Rated Flow and Pressure Calculator, Fire Pump Horsepower CalculatorKeep calculation notes showing how this step supports: determine required discharge pressure at the pump.
Step 3Account for elevation and friction loss.Fire Pump Rated Flow and Pressure Calculator, Fire Pump Horsepower Calculator, Available Water Supply CalculatorKeep calculation notes showing how this step supports: account for elevation and friction loss.
Step 4Estimate horsepower from flow, head, and efficiency.Fire Pump Rated Flow and Pressure Calculator, Fire Pump Horsepower Calculator, Available Water Supply CalculatorKeep calculation notes showing how this step supports: estimate horsepower from flow, head, and efficiency.
Step 5Compare against listed pump ratings and water supply data.Fire Pump Rated Flow and Pressure Calculator, Fire Pump Horsepower Calculator, Available Water Supply CalculatorRecord the reviewed output, warning state, and next review decision.

Required records

  1. 1Engineering workflow basis and project condition that triggered this guide.
  2. 2Input source notes for each calculator used in the sequence.
  3. 3Intermediate results, warnings, and pass/fail states from linked tools.
  4. 4Final review notes for engineering review, submittal review, field check, or AHJ coordination.

Review gates

  1. 1The sequence starts with project-specific inputs, not untouched default values.
  2. 2Each intermediate result is checked before being transferred into the next calculator.
  3. 3Warnings or failed screens are resolved or documented before final project use.
  4. 4Engineering context and local AHJ requirements remain part of the final review.

Next-step notes

  1. 1Use this guide as a workflow checklist, not as a sealed design package.
  2. 2Start with the related worksheet before treating the guide as complete.
  3. 3Open the linked calculators when a step needs a numeric screen.
  4. 4Transfer only reviewed values and documented assumptions into project calculations or submittal material.

Worksheet handoff

Calculation tools

Next records

Fire Pump Sizing Workflow

Before filing

  1. 1Start from the standard workflow context when the guide controls a design or field-review decision.
  2. 2Open the related worksheet before treating the guide as complete.
  3. 3Run the related calculator sequence when a step needs numeric screening.
  4. 4Retain reviewed inputs, warnings, and handoff notes before final project use.