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) bar |
| 1巴(压强) 1 bar | = = = = = | 100000.0 14.50377 100.0 10197.1621 33.456 | N/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 head |
| 1N/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 14.2233 | N/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 1/2 | 3.50 | 4 | 1/2 | 2.38 |
| DN20 3/4 | 3.88 | 4 | 1/2 | 2.75 |
| DN25 1 | 4.25 | 4 | 1/2 | 3.12 |
| DN32 1-1/4 | 4.62 | 4 | 1/2 | 3.50 |
| DN40 1-1/2 | 5.00 | 4 | 1/2 | 3.88 |
| DN50 2 | 6.00 | 4 | 5/8 | 4.75 |
| DN65 2-1/2 | 7.00 | 4 | 5/8 | 5.50 |
| DN80 3 | 7.50 | 4 | 5/8 | 6.00 |
| DN100 4 | 9.00 | 8 | 5/8 | 7.50 |
| DN150 6 | 11.00 | 8 | 3/4 | 9.50 |
| DN200 8 | 13.50 | 8 | 3/4 | 11.75 |
| DN250 10 | 16.00 | 12 | 7/8 | 14.25 |
| DN300 12 | 19.00 | 12 | 7/8 | 17.00 |
| ‡ 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 inch |
| 1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 head |
| 1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) psig |
| 1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 head |
| 1 磅/平方英寸(表压) 1 psig (gauge) | = | 27.6817 | 英寸水柱压力 inch of water head |