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🚀 The new Engineering Unit Converter is live! Welcome to try it out. For feedback or new tool suggestions, please contact us
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Engineering scenario
A lightweight workflow for early piping layout: size the line from published GB/T 17395 dimensions, check wall thickness with manually entered allowable stress, then estimate pressure drop. Engineering context passes between tools via URL.
Select outer diameter and wall thickness from published CommoditySpec data, or enter custom values. Compute inner diameter and velocity from flow rate.
Open pipe calculatorVerify minimum wall thickness for design pressure. Allowable stress S is entered manually until GB/T 20801.1-2025 appendix B is published.
GB/T 20801.1-2025 allowable stress lookup is in preparation — not yet published online.
Open pipe strength calculatorEstimate major, minor, and elevation losses using inner diameter and velocity from the previous steps.
Open pressure drop calculator