技术参数(2)Engineering Data (2)
尺寸和参数 - 管道螺纹， 法兰，以及压力换算系数Dimensions and References–Pipe Threads, Flanges, and Pressure Conversion Factors 美国标准锥管，NPT (摘选自ANSI B1.20.1)
American Standard Taper Pipe Thread, NPT (excerpt from ANSI B1.20.1)公称通径
Nominal
Size外径
Outside
Diameter每英寸
螺纹数量
Number
of Threads
Per Inch螺纹的
斜度
Pitch of
Thread正常手动
啮合深度
Normal
Engagement
By Hand有效螺纹
长度
Length of
Effective
Thread用于内端螺纹
的扳手装
配长度
Wrench
Makeup Length
for Internal
Thread管道到消
失点的全长
Total Length:
End of Pipe
to Vanish
Point外端螺纹开始
点的螺纹中径
Pitch Diameter
at Beginning
of External
Thread内端螺纹开始
点的螺纹中径
Pitch Diameter
at Beginning
of Internal
Thread螺纹高度
(最大)
Height of
Thread
(Max.)DnPL1L2L3L4E0E1h英寸
in.英寸
in. 英寸
in.英寸
in.英寸
in.英寸
in.英寸
in.英寸
in.英寸
in.英寸
in.DN6
1/40.540180.055560.2280.40180.16670.59460.477390.491630.04444DN15
1/20.840140.071430.3200.53370.21430.78150.758430.778430.05714DN20
3/41.050140.071430.3390.54570.21430.79350.967680.988870.05714DN25
11.31511-1/20.086960.4000.68280.26090.98451.213631.238630.06957DN32
1-1/41.66011-1/20.086960.4200.70680.26091.00851.557131.583380.06957DN40
1-1/21.90011-1/20.086960.4200.72350.26091.02521.796091.822340.06957DN50
22.37511-1/20.086960.4360.75650.26091.05822.269022.296270.06957DN65
2-1/22.87580.125000.6821.13750.25001.57122.719532.762160.10000DN80
33.50080.125000.7661.20000.25001.63373.340623.388500.10000DN100
44.50080.125000.8441.30000.25001.73374.334384.387120.10000 http://www.h6688.com/valve/nibco/040531/16/img/320_1.jpg
不要与Schedule 40管道的螺纹啮合
Do not thread Schedule 40 pipe.
压力系数
Pressure Factors 压力测量是以标准水压为基础，具有各种不同的英制和公制单位。
Pressure measurements are based on the standardized weight of water expressed in a variety of English and metric units.1 磅/平方英寸(表压)
1 psig (gauge)=
=
=
=
=
=2.3068
2.036
0.0689
0.0703
6894.757
6.8948水柱高度(英尺)
foot of water head
水银柱高度(英寸)
inch of mercury head
巴(压强)
bar
kgm/cm2 (千克/厘米2)
kgm/cm2 (kilograms/centimeter2)
N/m2 (牛顿/米2)
N/m2 (newton/meter2)
kPa (千帕)
kPa (kilopascal)1英尺水柱
1 foot of water=
=
=
=
=0.4335
0.0305
2988.8837
0.33457
0.02989磅/平方英寸(表压)
psig
kgm/cm2 (千克/厘米2)
kgm/cm2 (kilograms/centimeter2)
N/m2 (牛顿/米2)
N/m2 (newton/meter2)
kPa (千帕)
kPa (kilopascal)
巴(压强)
bar1巴(压强)
1 bar=
=
=
=
=100000.0
14.50377
100.0
10197.1621
33.456N/m2 (牛顿/米2)
N/m2 (newton/meter2)
磅/平方英寸(表压)
psig
kPa (千帕)
kPa (kilopascal)
kgm/cm2 (千克/厘米2)
kgm/cm2 (kilograms/centimeter2)
水柱高度(英尺)
foot of water head1N/m2 (牛顿/米2)
1 N/m2 (newton/meter2)=
=
=1.0
0.000010197
0.000145帕(帕斯卡) = 0.001千帕
Pa (pascal) = 0.001 kPa (kilopascal)
kgm/cm2 (千克/厘米2)
kgm/cm2
磅/平方英寸(表压)
psig (gauge)1千克/厘米2
1 kilogram/centimeter2=
=98066.5
14.2233N/m2 (牛顿/米2)
N/m2 (newton/meter2)
磅/平方英寸(表压)
psig ANSI B16.5尺寸参数 - 法兰和法兰连接件
ANSI B16.5 Dimensional Data – Flanges and Flanged Fittings尺寸
Dimensions‡钻孔
Drilling公称通径
Nominal
Pipe Size外径
Outside
Diameter孔数
Number
of Holes螺栓直径
Diameter
of Bolt螺栓圆周直径
Diameter of
Bolt Circle(英寸)
(In.)(英寸)
(In.) (英寸)
(In.)(英寸)
(In.)DN15
1/23.5041/22.38DN20
3/43.8841/22.75DN25
14.2541/23.12DN32
1-1/44.6241/23.50DN40
1-1/25.0041/23.88DN50
26.0045/84.75DN65
2-1/27.0045/85.50DN80
37.5045/86.00DN100
49.0085/87.50DN150
611.0083/49.50DN200
813.5083/411.75DN250
1016.00127/814.25DN300
1219.00127/817.00‡ 尺寸和螺栓符合ANSI B16.5标准的150磅钢法兰。
螺栓孔的直径比螺栓直径大1/8英寸以上。
‡ Dimensions and bolts conform to ANSI B16.5 for 150 lb. steel flanges.
Bolt holes are 1/8" larger in diameter than the required bolts. 真空系数
Vacuum Factors 真空可以被认为缺少压力。真空是以标准大气压的负压和理论完全真空来测量的。
Vacuum may be thought of as the absence of pressure. It is the measure of negative pressure between standardized atmospheric pressure and a theoretically perfect vacuum.1各标准大气压
1 Std. Atmosphere=
=
=
=
=14.6959
760.0
1.0332276
1.01325
101.325磅/平方英寸(绝对压强)
psia (absolute)
毫米汞柱压力
mm (millimeter) of mercury head
kgm/cm2 (千克/厘米2)
kgm/cm2 (kilograms/centimeter2)
巴(压强)
bar
kPa (千帕)
kPa (kilopascal)1毫米
1 mm=0.03937英寸
inch1微米汞柱
1 micron of mercury=
=0.001
0.000019336毫米汞柱压力
mm (millimeter) of mercury head
磅/平方英寸(表压)
psig (gauge)1毫米汞柱
1 mm of mercury=1000.0微米汞柱压力
micron of mercury head1英寸
1 inch=25.4毫米
mm (millimeter)1英寸汞柱
1 inch of mercury=
=25400.0
0.4912微米汞柱压力
micron of mercury head
磅/平方英寸(表压)
psig1英寸水柱
1 inch of water=
=0.0361
1868.2742磅/平方英寸(表压)
psig
微米汞柱压力
micron of mercury head1 磅/平方英寸(表压)
1 psig (gauge)=27.6817英寸水柱压力
inch of water head不要将本样本中的测试数据用在压缩空气或其它气体上。如果需要关于专用于压缩空气和其它气体的抗龟裂热塑塑料管道系统请参阅Chemtrol Chem-Aire®产品样本。
Do not use or test the products in this catalog with compressed air or other gases. See Chemtrol Chem-Aire® literature for information about shatter-resistant thermoplastic piping systems specifically designed for compressed air and other gases.
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