对焊管件尺寸公差
( Tolerances For Butt-welding Fittings
) |
|
公称直径
Nominal Diameter |
坡扣处外径
O.D.For Bevel
End |
端部内径
I.D.For End |
壁厚
Wall Thickness |
90o、45o弯头
Elbow |
三通
Tee |
异径管
Reducer |
管帽
Cap |
180o弯头
Elbow |
| DN |
NPS |
A |
B |
C |
M |
H |
E |
O |
K |
不平度 |
| 15-65 |
1/2-2.1/2 |
+1.6
-0.8 |
±0.8 |
-12.5% |
±1.6 |
±1.6 |
±1.6 |
±1.6 |
±1.6 |
±3.2 |
±6.4 |
±6.4 |
±0.8 |
| 80-100 |
3-4 |
±1.6 |
±1.6 |
| 125-200 |
5-8 |
+2.4
-1.6 |
±6.4 |
| 250-450 |
10-18 |
+4.0
-3.2 |
±3.2 |
±2.4 |
±2.4 |
±2.4 |
±2.4 |
±2.4 |
±9.6 |
| 500-600 |
20-24 |
+6.4
-4.8 |
±4.8 |
±3.2 |
±3.2 |
±3.2 |
±3.2 |
±4.8 |
±9.6 |
|
|
|
| 650-750 |
26-30 |
|
|
|
| 800-1200 |
32-48 |
±4.8 |
±4.8 |
±4.8 |
±4.8 |
|
|
|
| 1250-1500 |
50-60 |
+9.6
-6.4 |
±6.4 |
±9.6 |
±9.6 |
±9.6 |
±9.6 |
±9.6 |
|
|
|
|
| 1550-1750 |
62-70 |
+12.7
-9.6 |
±9.6 |
±12.7 |
±12.7 |
|
|
|
|
|
|
|
| 1800-2000 |
72-80 |
+16
-12 |
±12 |
±16 |
±16 |
|
|
|
|
|
|
|
|
| |
对焊管件形位公差
( Angularity Tolerance of Butt-welding
Fittings ) |
|
公称通径
Nominal Diameter |
DN |
15-100 |
125-200 |
250-300 |
350-400 |
450-600 |
650-750 |
800-1050 |
1100-1200 |
1300-1500 |
| NPS |
1/2-4 |
5-8 |
10-12 |
14-16 |
18-24 |
26-30 |
32-42 |
44-48 |
52-60 |
| 倾斜角度差Angularity
tolerance |
角度偏移
Off Angle |
Q |
1 |
2 |
3 |
3 |
4 |
5 |
5 |
5 |
6.4 |
| 角度平移Off
Plain |
P |
2 |
4 |
5 |
6 |
10 |
10 |
13 |
19 |
20 |
|
注：极限公差在不同标准中可能会略有差异。 |
| |
承插焊管件尺寸的极限公差(Tolerances
For Socket-welding Fittings) |
|
公称通径
Nominal Size |
所有管件
All Fittings |
45o、90o弯头、三通、四通、斜三通
Elbow、Tee、Cross、Lateral |
双承口管箍
Coupling |
单承口管箍、异径接头Half-coupling
Reducing Inserts |
活接头(承插与螺纹)
Union (Socket and Thread) |
承插孔径
Socket Bore |
流通孔径
Water Way Bore |
中心至承插孔底
Center To Bottom of Socket |
结构长度
Laying Lengths |
结构长度
Laying Lengths |
公称装配长度
Length Assem Nominal |
| DN |
NPS |
d1 |
d2 |
A、H |
E |
F |
L |
| 6-8 |
1/8-1/4 |
|
|
±0.8 |
±1.5 |
±0.8 |
±1.5 |
| 10-20 |
3/8-3/4 |
+0.3
0 |
±0.4 |
±1.5 |
±3.0 |
±1.5 |
±1.5 |
| 25-50 |
1-2 |
|
|
±2.0 |
±4.0 |
±2.0 |
±1.5 |
| 65-100 |
2.1/2-4 |
+0.4
0 |
±0.8 |
±2.5 |
±5.0 |
±2.5 |
±1.5 |
|
| |
螺纹管件尺寸的极限公差(Tolerances
For Threaded Fittings ) |
|
公称通径
Nominal Size |
45o、90o弯头、三通、四通
Elbow、Tee、Cross |
双接口管箍、管帽
Coupling、Cap |
单接口管箍、半管接头
Half Coupling、Boss |
中心至端面
Center To End |
端面至端面
End To End |
端面至端面
End To End |
| DN |
NPS |
A |
E、F |
E/2 |
| 6-8 |
1/8-1/4 |
±0.7 |
±0.7 |
±0.4 |
| 10-20 |
3/8-3/4 |
±1.5 |
±1.5 |
±0.8 |
| 25-50 |
1-2 |
±2.0 |
±2.0 |
±1.0 |
| 65-100 |
2.1/2-4 |
±2.5 |
±2.5 |
±1.3 |
|
| |
支管台尺寸的极限公差(Tolerances
For O'lets) |
|
| 支管台尺寸 |
极限偏差
Tolerances |
| DN≤50
(2") |
DN≥65
(2.1/2") |
| 外径
O.D |
±1.6 |
| 长度
The length |
±1.6 |
| 承口内径
I.D |
±0.3 |
±0.4 |
| 内径
I.D |
±0.4 |
±0.8 |
| 承口深度
The depth of socket end |
±0.5 |
| 圆弧半径
Radius |
±0.5 |
|
注：极限公差在不同标准中可能会略有差异。 |
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