Rechtliche Hinweise

Nutzungsbedingungen & Technischer Haftungsausschluss

Mit der Nutzung unserer Rechner stimmen Sie diesen Bedingungen zur Vorplanung, ingenieurmäßigen Kontrollpflicht und Haftungsbeschränkung zu.

1. Educational and preliminary scoping scope only

All calculations, equations, reference charts, and fluid mechanics tables published on this website are provided strictly for educational study, conceptual system sizing, and preliminary field estimation. They do not constitute certified engineering plans, stamped construction submittals, or formal regulatory compliance documentation.

2. Life-safety and critical infrastructure exclusion

This website must never be relied upon as the sole basis for designing, installing, testing, or approving life-safety, fire protection, or high-hazard pressure systems, including:

• Automatic fire sprinkler networks governed by NFPA 13, EN 12845, or ABNT NBR 10897
• Standpipe and hose systems governed by NFPA 14
• Stationary fire pump installations governed by NFPA 20
• Municipal potable water distribution infrastructure and fire hydrant capacity governed by AWWA standards
• High-pressure industrial steam, chemical, or gas process lines governed by ASME B31

Systems affecting life safety, structural safety, or environmental integrity must be designed, calculated, and stamped by a licensed Professional Engineer (PE) and authorized by the local Authority Having Jurisdiction (AHJ).

3. Boundary conditions and physical assumptions

Unless explicitly configured otherwise by user inputs, all calculation engines assume:

• Fluid Properties: Standard single-phase liquid water at ambient conditions (60°F / 15.6°C, density ρ ≈ 62.4 lb/ft³ or 1000 kg/m³, kinematic viscosity ν ≈ 1.217 × 10⁻⁵ ft²/s or 1.004 × 10⁻⁶ m²/s). Variations resulting from elevated temperatures, glycol mixtures, slurries, or aeration are not included.
• Steady-State Flow: All models evaluate continuous, non-pulsating flow. Transient dynamic phenomena—such as water hammer, column separation, cavitation collapse, and rapid valve closure surges—require dedicated hydraulic transient analysis.
• Pipe Dimensions and Roughness: Calculations utilize standard wall schedules (such as ASTM Schedule 40/80 PVC, copper tube types K/L/M, or ISO/DIN pressure classes) and typical Hazen-Williams C-factors or Colebrook-White absolute roughness (ε). Field piping subject to tuberculation, internal scale buildup, or wall thinning will exhibit different friction characteristics.

4. Limitation of liability

PSI to GPM, its developers, authors, and contributors make no warranties of any kind, express or implied, regarding calculation accuracy, completeness, or operational fitness for a specific purpose. Under no circumstances shall PSI to GPM or its contributors be held liable for any direct, indirect, incidental, consequential, special, or exemplary damages—including mechanical failure, pipe rupture, equipment damage, commercial downtime, or injury—arising from the use of this website or reliance on its outputs.

5. Acceptable use & intellectual property

You may utilize our calculators for individual reference, contractor troubleshooting, and internal engineering scoping. You may not scrape, frame, mirror, or republish our calculation algorithms, text articles, or UI components within competing commercial platforms without prior written authorization.

6. Revisions, errata and updates

We maintain the right to adjust formulas, published constants, and these terms at any time to reflect revised engineering codes. All updates are logged transparently in our Calculation Errata & Updates Log.

7. Governing law and dispute resolution

These terms and any dispute arising from the use of this website shall be governed by and construed in accordance with the applicable laws of the operating jurisdiction, without giving effect to conflicts of law principles.