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Tolerance of ASME B16.9 standard butt welding pipe fittings

2019-07-16 17:27:01 Hits:3737 American Standards / Product Standards
Tolerance of ASME B16.9 butt welding pipe fittings

Tolerance of ASME B16.9 butt welding pipe fittings

Alignment tolerances are concerned with the way that the ends of a fitting are cut.

All Fittings[Note(1) and (2)] Center-to-End Diamensions Overall Length of Reducers and Lap Joint Stub Ends,F,H Overall Length of Caps, E 180-deg Returns
Nominal  Pipe Size(NPS) DN Outside Diameter at Bevel,D[Note(3) and (4)] Inside Diameter at End [Note(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 Demensoin, K Alignment of Ends, U
 1/2 to 2 1/2 15-65  +1.6-0.8 0.8 2 3 2 3 6 6 1
3 to 3 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
5 to 8 125-200  +2.4 -1.6 1.6 2 3 2 6 6 6 1
10 to 18 250-450  +4.0 -3.2 3.2 2 3 2 6 10 6 2
20 to 24 500-600  +6.4 -4.8 4.8 2 3 2 6 10 6 2
26 to 30 650-750  +6.4 -4.8 4.8 3 6 5 10 … … …
32 to 48 800-1200  +6.4 -4.8 4.8 5 6 5 10 … … …
All Fittings[Note(1) and (2)] Center-to-End Diamensions Nominal Pipe Size(NPS) DN Angularity Tolerance
Nominal  Pipe Size(NPS) DN Outside Diameter at Bevel,D[Note(3) and (4)] Inside Diameter at End [Note(3) and (5)] Outside Diameter of Lap,G Fillet Radius of Lap,R Lap Thickness Off Angle,Q Off Plane,P
 1/2 to 2 1/2 15-65  +1.6-0.8 0.8 +0,-1 +0,-1 +1.6,-0 1/2 to 4 15-100 1 2
3 to 3 1/2 80-90 1.6 1.6 +0,-1 +0,-1 +1.6,-0 5 to 8 125-200 2 4
4 100 1.6 1.6 +0,-1 +0,-2 +1.6,-0 10 to 12 250-300 3 5
5 to 8 125-200  +2.4 -1.6 1.6 +0,-1 +0,-2 +1.6,-0 14 to 16 350-400 3 6
10 to 18 250-450  +4.0 -3.2 3.2 +0,-2 +0,-2 +3.2,-0 18 to 24 450-600 4 `10
20 to 24 500-600  +6.4 -4.8 4.8 +0,-2 +0,-2 +3.2,-0 26 to 30 650-750 5 10
26 to 30 650-750  +6.4 -4.8 4.8 … … … 32 to 42 800-1050 5 13
32 to 48 800-1200  +6.4 -4.8 4.8 … … … 44 to 48 1100-1200 5 19

GENERAL NOTES:

(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 thickness 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.

Meanwhile,we manufacture & supply different types of butt welding fittings according to ASME B16.9 standard as follows:

Haihao Group manufacture & supply & export pipeline products more than 30 years,which contain butt welding pipe fittings(elbows,tees,reducers,caps,bends,crosses,etc),forged pipe fittings(socket weld/threaded elbows,tees,reducers,crosses,couplings,union,outlet,nipple,etc),steel pipes(seamless steel pipes,SAW/ERW steel pipes,casing and tubing pipes,etc) and forged flanges(weld neck flange,slip on flange,blind flange,lap joint flange,plate flange,threaded flange,socket weld flange,orifice flange,spectacle blind flange,weld overlay cladding flange,etc).We supply the products in different standards such as ANSI/ASME, ASTM, BS, EN, JIS, GOST, ISO, MSS, etc.If you want to know more about our pipeline products,please email us:sales@haihaogroup.com

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