Dimensional Tolerances for Butt Welding Fittings

All Fittings 90 Deg. & 45 Deg.
Elbows and Tees		 Reducers
& Lap Joint
Stub Ends		Caps
Nominal Pipe
Size		 Outside
Diameter
at Bevel		 Inside
Diameter
at End		 WallThickness T Center-to-End
Dimension
A ,C ,B		 Over-all
Length H		 Over-all
Length F
1/2 to 2-1/2+0.06Not less than 87.5%
of nominal thickness		+/- 0.06+/- 0.06+/- 0.12
-0.03
3 to 3-1/2+/- 0.06+/- 0.06+/- 0.06+/- 0.06+/- 0.12
4+/- 0.06+/- 0.06+/- 0.06+/- 0.06+/- 0.12
5 to 8+/- 0.06+/- 0.06+/- 0.06+/- 0.06+/- 0.25
10 to 18+0.16+/- 0.12+/- 0.09+/- 0.09+/- 0.25
-0.12
20 to 24+0.25+/- 0.19+/- 0.09+/- 0.09+/- 0.25
-0.19
26 to 30+0.25+/- 0.19+/- 0.12+/- 0.19+/- 0.38
-0.19
32 to 48+0.25+/- 0.19+/- 0.19+/- 0.19+/- 0.38
-0.19
All dimensions are in inches. Tolerances shown are in accordance with the dimensional tolerances approved by the American National Standards Institute (ANSI B16.9) for all carbon alloy fittings except Short Radius Elbows and Returns. These are governed by ANSI B16.28.
  
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