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Data Sources & References

Engineering calculators are only as good as their data sources. We document where our formulas, constants, and material properties come from.

Standards Organizations

ASME (American Society of Mechanical Engineers)
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Boiler and Pressure Vessel Code, B31 piping standards, pump standards

ASME B31.1 Power PipingASME B31.3 Process PipingASME BPVC Section VIII
ASTM International
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Material properties, testing standards, and material specifications

ASTM A36 Carbon SteelASTM A312 Stainless Steel PipeASTM material property tables
API (American Petroleum Institute)
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Petroleum and chemical industry standards for pumps, valves, and equipment

API 610 Centrifugal PumpsAPI 6D Pipeline ValvesAPI 650 Storage Tanks

Reference Sources by Category

Material Properties
  • ASM International Materials Handbook
  • ASTM material specifications (A36, A53, A106, A312, etc.)
  • Manufacturer data sheets and published material properties
  • MatWeb material property database
Fluid Mechanics & Hydraulics
  • Crane Technical Paper 410 — Flow of Fluids
  • Darcy-Weisbach equation (standard fluid mechanics)
  • Moody friction factor charts and Colebrook-White equation
  • Idelchik Handbook of Hydraulic Resistance
Pump Engineering
  • API 610 — Centrifugal Pumps for Petroleum, Chemical and Gas Industry
  • Hydraulic Institute Standards
  • Karassik, I.J. — Pump Handbook
  • Gulich, J.F. — Centrifugal Pumps
Heat Transfer
  • Incropera & DeWitt — Fundamentals of Heat and Mass Transfer
  • TEMA Standards for heat exchangers
  • LMTD method (standard thermal design)
  • Perry's Chemical Engineers' Handbook
Structural & Mechanical
  • AISC Steel Construction Manual
  • Roark's Formulas for Stress and Strain
  • Beer/Johnston — Mechanics of Materials
  • Shigley's Mechanical Engineering Design

Corrections & Updates

Standards are updated periodically, and we strive to keep our calculators current with the latest editions. If you find a reference that is out of date or a formula that does not match the current standard, please report it.

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