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Tolerance For Flange Dimension
flanges can be used for petroleum industry, WANLEI offers ASME, JIS, EN, GB standard flanges to clients. For example, ASME B16.5, ASME B16.47, JIS B2220, EN 1092, GB 9119 and so on. Diameter from 1/2” to 60”. Welcome to visit our website to purchase.
Description
Tianjin Wanlei Steel Pipe Co., Ltd. is one of the leading manufacturers and suppliers of tolerance for flange dimension in China, featured by quality products and low price. If you're going to wholesale durable tolerance for flange dimension made in China, welcome to get pricelist and free sample from our factory.
TOLERANCE FOR FLANGE DIMENSION
Related standard for flange:
ASME B16.5 Pipe Flanges and Flanged Fittings from 1/2inch to 24inch
ASME B16.47 Large Diameter Steel Flanges from 26inch to 60inch
Pressure class of flange:
Class 75, Class 150, Class 300, Class 400, Class 600, Class 900, Class 1500, Class 2500
WANLEI has Slip-on welding flange, Welding neck flange, Socket welding flange, Lapped joint flange, Threaded flange, Blind flange
Tolerance for flange dimension:
PART 1, ASME B16.5 flange 1/2inch to 24inch (15A to 600A)
|
Part of flange |
Division by dimension |
Dimensional tolerance |
||
|
Outside diameter |
O |
610mm max. |
±1.6 |
|
|
Bore |
B1 |
WN |
250A (10") max. |
±0.8 |
|
300A~450A (12"~18") |
±1.6 |
|||
|
500A(20") & Over |
+3.2, -1.6 |
|||
|
B2 |
SO |
250A (10") max. |
+0.8, 0 |
|
|
B2 |
SW |
15A~50A (1/2"~2") |
+0.3, 0 |
|
|
B1 |
15A~50A (1/2"~2") |
±0.4 |
||
|
Diameter at Base of Hub |
X |
WN |
610mm max. |
±1.6 |
|
SO |
300A (12") max. |
+1.6, -0.8 |
||
|
Diameter of Hub at Bevel |
A |
WN |
125A (5") max. |
+2.4, -0.8 |
|
Thickness |
t |
450A (18" ) max. |
+3.2, 0 |
|
|
Length thru Hub |
Y1 |
WN |
100A (4") max. |
±1.6 |
|
125A~250A (5"~10") |
+1.6, -3.2 |
|||
|
300A (12") & Over |
+3.2, -4.8 |
|||
|
Y2 |
SO |
450A (18") max. |
+3.2, -0.8 |
|
|
Bolt Holes |
C |
Bolt circle diameter |
±1.6 |
|
|
Interval of bolt holes |
±0.8 |
|||
|
H |
Diameter of bolt holes |
±0.5 |
||
|
Eccentricity between Bore and Bolt circle Diameter |
0.8 max |
|||
|
Eccentricity between Bore and Bolt & Raised Face diameter |
0.8 max |
|||
|
Thickness at Bevel end |
W |
For all nominal pipe size |
-12.5% |
|
PART 2, ASME B16.47 flange 26inch to 60inch (650A to 1500A)
|
Part of flange |
Division by dimension |
Dimensional Tolerances |
|
|
Outside Diameter |
O |
For all sizes |
±3.2 |
|
Bore |
B |
For all sizes |
+3.2, -1.6 |
|
Hub Diameter |
H |
At Bevel of Hub |
+5.3, -1.6 |
|
X |
At Base of Hub |
±3.2 |
|
|
Diameter of raised face |
R |
1.6mm Raised Face |
±2 |
|
6.5mm Raised Face |
±1 |
||
|
Thickness |
Q |
50.8mm incl. |
+4.8, 0 |
|
Over 50.8mm to 76.2mm incl. |
+7.9, 0 |
||
|
Over 76.2mm |
+9.7, 0 |
||
|
Length |
Y |
For all sizes |
±4.8 |
|
Thickness of Hub End |
t |
For all sizes |
-12.5% |
|
Parallelism between bearing surface of nut and gasket contact face |
1° max. |
||
|
Bolt Holes |
c |
Bolt circle diameter |
±1.6 |
|
d |
Diameter of bolt holes |
±0.5 |
|
|
Interval of bolt holes |
±0.8 |
||
|
Eccentricity between Bore and Bolt circle Diameter |
0.8 max. |
||
|
Eccentricity between Bore and Bolt & Raised Face diameter |
0.8 max. |
||
|
Eccentricity between Bolt circle diameter and Machined raised face diameter |
±1.6 |
||
Measure for flange dimension:
This is the measurement of bolt hole (C)
This is the measurement of Thickness (t)
This is the measurement of Outside diameter (O).
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