Sources · Evidence Register

See what supports each kind of HowNote information.

HowNote separates official standard metadata, manufacturer reference data, metrology conversion factors, calculated outputs and interface research.

OFFICIAL

ASME B36.10-2022

Used for standard designation, title, edition and official scope summary.

Open ASME source →

MANUFACTURER

Wheatland Tube standard-pipe literature

Used as one side of the limited OD, wall and nominal-mass cross-check for the initial Schedule 40 subset.

Open Wheatland resource →

MANUFACTURER

Nucor Tubular A53 standard pipe

Used as an independent manufacturer reference for the first public pipe-size subset.

Open Nucor source →

METROLOGY

NIST unit-conversion references

Used for the exact international inch and traceable mass and pressure conversion factors.

Length Mass Pressure

INTERFACE REFERENCE

Whole-Spec

Reviewed for product-family navigation, integrated size lookup and tool-to-reference workflow. It is not used as the production source for HowNote’s published pipe dimensions.

Open Whole-Spec reference →

CALCULATED

HowNote calculation engine

Inside diameter, cross-sectional area, kg/m, lb/ft, piece mass and order mass are calculated from the user-visible geometry and density inputs.

Review the formula →