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BW Fittings General
LR Elbows
SR Elbows
3D Elbows
LR & SR Returns
Straight Tees
Reducing Tees
Pipe Reducers
Stub Ends
Caps
Welding Bevels
Tolorances
Approx Weight
Elbows (EN10253.2)
Caps (EN10253.2)

Tolorances 

 Tolorances,BW Fittings
Tolerance  ASME B16.9

All Fittings [Note(1) and (2)]      Center-to-End   Dimensions  Overall Length  of Reducers and  Lap Joint  Stub Ends, F,H  Overall  Length  of Caps, E 180-deg Returns
NPS                         DN  Outside  Diameter  at Bevel, D[Notes(3) and (4)] Inside  Diameter  at End 
[Notes(3) and (5)]
90-deg and 45-deg Long and  Short Radius  Elbows and Tees. 
 A,B,C,M
3D Radius 
 Elbows, A,B
Center-to-Center  Dimension, O Back-to-Face  Dimension, K Alignment  of Ends, U
 1/2to2 1/2 15-65  +1.6-0.8 0.8 2 3 2 3 6 6 1
3to3 1/2 80-90 1.6 1.6 2 3 2 3 6 6 1
4 100 1.6 1.6 2 3 2 3 6 6 1
5to8 125-200  +2.4 -1.6 1.6 2 3 2 6 6 6 1
10to18 250-450  +4.0 -3.2 3.2 2 3 2 6 10 6 2
20to24 500-600  +6.4 -4.8 4.8 2 3 2 6 10 6 2
26to30 650-750  +6.4 -4.8 4.8 3 6 5 10 ... ... ...
32to48 800-1200  +6.4 -4.8 4.8 5 6 5 10 ... ...  ... 

NPS DN Center-to-End Diamensions  NPS DN Angularity Tolerance
Outside  Diameter  of Lap, G Fillet Radius  of Lap, R Lap 
Thickness
Off Angle, Q Off Plane, P
 1/2to2 1/2 15-65 +0,-1 +0,-1 +1.6,-0 1/2to4 15-100 1 2
3to3 1/2 80-90 +0,-1 +0,-1 +1.6,-0 5to8 125-200 2 4
4 100 +0,-1 +0,-2 +1.6,-0 10to12 250-300 3 5
5to8 125-200 +0,-1 +0,-2 +1.6,-0 14to16 350-400 3 6
10t018 250-450 +0,-2 +0,-2 +3.2,-0 18to24 450-600 4 `10
20to24 500-600 +0,-2 +0,-2 +3.2,-0 26to30 650-750 5 10
26to30 650-750 ... ... ... 32to42 800-1050 5 13
32to48 800-1200 ... ... ... 44to48 1100-1200 5 19
a) All dimensions are in mm.
b) Tolerances are equal plus and minus except as noted.
Notes:
1) The inside diameter and the nominal wall thicknesses at ends are to be specified by the purchaser.
2) A minimum wall thickness of 87.5% applies unless the purchaser specifies a different wall thickness tolerance.
3) Out-of-round is the sum of absolute values of plus and minus tolerances.
4) This tolerance may not apply in localized areas of formed fittings where increased wall thckness is required to meet design requirements of ASME B16.9 para 2.2
5) Unless otherwise specified by the purchaser,these tolerances apply to the nominal inside diameter,which equals the difference between the nominal outside diameter and twice the nominal wall thickness.