Sizes of butt welding fitting

The welded fittings (elbows a reducers) are mainly used as part of the piping systems in building and power industries.


Dimensions of elbows according to european standards

– outside diameter x wall thickness (OD x WT):
  • 21.3 x 2.0 – 610.0 x 12.50 mm [15 – 600 DN] [1/2 – 24 NPS]
– application:
  • elbows for elevated temperature *
  • elbows for general use *
  • elbows for low temperature *
  • elbows for pipe line *
  • elbows for room temperature service *
  • elbows for water and gas pipe line *
  • fine grain steel elbows *

Dimensions of long radius elbows and returns according to standard ASME/ANSI B16.9

– outside diameter x wall thickness (OD x WT):
  • 33.4 x 3.38 – 168.3 x 4.37 mm [1.315 x 0.133 – 6.625 x 0.172 in] [1 – 6 NPS]
– application:
  • elbows for elevated temperature *
  • elbows for low temperature *

Dimensions of reducers – Type K

– outside diameter x wall thickness (OD x WT):
  • 26.9 x 2.3 – 114.3 x 3.60 mm [20 – 100 DN] [3/4 – 4 NPS]
– application:
  • butt welding reducers *

Allowed sizes and shapes tolerances of butt welding fittings

– outside diameter x wall thickness (OD x WT):
  • Tab35
– application:
  • elbows for elevated temperature *
  • elbows for general use *
  • elbows for low temperature *
  • elbows for pipe line *
  • elbows for room temperature service *
  • elbows for water and gas pipe line *
  • fine grain steel elbows *


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