Pipe Standards Made Simple

Weld Neck Flange Dimensions

ASME B16.5 Standard Technical Data (Metric)



General Dimensions
  • Outside Diameter (O)–
  • Thickness (C)–
  • Length thru Hub (Y)–
  • Hub Diameter (X)–
  • Weld End Dia (A)–
Facing (RF & RTJ)
  • RF Dia / Height–
    • RTJ Ring No. (R)–
    • RTJ RF Diameter–
    • Pitch / Width / Height–
Bolting & Mass
  • No. of Bolts / Size–
  • Bolt Hole Diameter–
  • Stud Length (RF/RTJ)–
  • PCD–
  • Estimated Weight
    – kg

Dimension Guide

O: Outside Dia
C: Thickness
Y: Height
X: Hub Dia
A: Weld End Dia