Editorial & Quality Standards

Editorial & Calculation Verification Policy

At PSI to GPM, our mission is to deliver dependable, mathematically transparent hydraulic calculation tools and engineering references. This policy defines our editorial principles, review procedures, fact-checking methodology, and standards on artificial intelligence.

1. Mathematical Accuracy & Primary Sourcing

Every calculation model published on PSI to GPM must be backed by authoritative, peer-reviewed engineering literature or established consensus industry codes, including:

• National Fire Protection Association (NFPA) standards (e.g., NFPA 13, 20, 291).
• American Water Works Association (AWWA) manuals (e.g., M11, M17, M31).
• ASTM International dimensional pipe specifications (e.g., D1785, B88).
• Crane Co. Technical Paper No. 410 (Flow of Fluids Through Valves, Fittings, and Pipe).
• ANSI / ISA and Hydraulic Institute Standards.

We do not rely on unverified third-party blogs, secondary blog aggregators, or anecdotal formulas. When an empirical equation is used (such as Hazen-Williams), its inherent limitations (such as temperature ranges and applicability to water only) are explicitly declared.

2. Verification & Peer Review Process

Before any interactive calculator or technical reference guide is published or updated, it undergoes a three-stage verification process:

1. Formula Derivation Verification: Equations are checked for dimensional consistency and compared against primary source literature.
2. Boundary & Edge Case Testing: Calculators are tested across extreme boundary conditions (zero flow, extreme friction, laminar/turbulent transitions) to ensure inputs outside safe operational limits trigger informative notices rather than erroneous outputs.
3. Cross-Validation Against Benchmark Solvers: Output values are cross-checked against benchmark reference tables (e.g., NFPA 291 pitot discharge tables or Cameron Hydraulic Data) to confirm numerical parity within standard rounding tolerances.

3. Artificial Intelligence (AI) Policy & Human Accountability

We maintain strict standards regarding the use of computational assistance and generative artificial intelligence:

• No Machine-Generated Physics: Fluid dynamics formulas, discharge constants, and mathematical models are never generated autonomously by AI models. All algorithms are hand-coded from standard engineering texts.
• Human Verification of Content: Where AI tools are utilized for code scaffolding, automated testing scripts, or editorial phrasing, all technical explanations, equations, and worked examples are verified by human technical editors against primary engineering references.
• No Hallucinated Credentials: We never generate fictional experts, simulated peer reviews, or fabricated user testimonials.

4. Corrections & Errata Policy

We are committed to immediate transparency when mathematical discrepancies, outdated code citations, or typographical errors are detected. When an error is reported or identified:

1. Logging: The report is recorded in our internal tracking queue.
2. Verification: The claim is reviewed against governing standards within 1 to 2 business days.
3. Correction & Public Disclosure: If a calculation requires adjustment, the code is updated immediately, and the change is documented in our public Calculation Errata & Updates Log.

To report an error, please visit our Contact page with the tool URL, input conditions, observed vs. expected output, and the governing engineering citation.

5. Commercial Independence & Advertising Disclosure

PSI to GPM is an independent educational and technical reference platform. We do not accept sponsored formula modifications, paid product endorsements, or vendor-biased calculation constants. Any future advertising integrations will be clearly separated and labeled distinctly from technical calculation interfaces.