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常见压力,管径,螺纹单位换算
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常用压力单位换算表 Kgf/cm2 | Mpa | Bar | KPa | mBar | psi | mmH2O | Torr | atm | Pa(N/M2) | 微巴 μbar | inHg | 千克力/厘米2 | ib/in2 | mmAq | mmHg | 帕斯卡 | 工程大气压 | 兆帕 | 巴 | 千帕 | 毫巴 | 磅/英寸2 | 毫米水柱 | 毫米汞柱 | 标准大气压 | 牛顿/米2 | 巴利 | 英寸汞柱 | 1 | 0.098066 | 0.980665 | 98.067 | 980.67 | 14.223 | 10,000 | 735.559 | 0.96784 | 98063.891 | 980638.91 | 28.9641819 | 10.1972 | 1 | 10 | 1,000 | 10,000 | 145.04 | 101,971.6 | 7,500.61 | 9.8692 | 999977.10 | 9999771.0 | 295.353555 | 1.01972 | 0.1 | 1 | 100 | 1,000 | 14.504 | 10,197.16 | 750.062 | 0.98692 | 99997.710 | 999977.10 | 29.5353555 | 0.0102 | 0.001 | 0.01 | 1 | 10 | 0.145 | 101.9716 | 7.50062 | 0.009869 | 1000.2516 | 10002.516 | 0.29543465 | 0.00102 | 0.0001 | 0.001 | 0.1 | 1 | 0.0145 | 10.19716 | 0.750062 | 0.000987 | 100.02516 | 1000 | 0.02954346 | 0.07031 | 0.006895 | 0.06895 | 6.895 | 68.95 | 1 | 703.08 | 51.7157 | 0.06805 | 6891.1564 | 68950 | 2.03537414 | 0.0001 | 0.000009 | 0.000098 | 0.0098 | 0.098 | 0.0014 | 1 | 0.073556 | 0.000096 | 9.8063891 | 98.063891 | 0.00289361 | 0.00136 | 0.000133 | 0.001333 | 0.1333 | 1.3332 | 0.0193 | 13.5951 | 1 | 0.001316 | 133.28947 | 1332.8947 | 0.03936842 | 1.03323 | 0.101325 | 1.013250 | 101.33 | 1013.3 | 14.696 | 10,332.28 | 760 | 1 | 101300 | 1013000 | 29.92 | 1.01*10-5 | 0.000001 | 0.00001 | 0.001 | 0.01 | 1.45*10-4 | 0.010197 | 0.000750 | 9.869*10-6 | 1 | 10 | 0.00029536 | 1.01*10-6 | 0.0000001 | 0.000001 | 0.0001 | 0.001 | 1.45*10-5 | 0.0101974 | 7.5*10-4 | 9.8*10-7 | 0.1 | 1 | 0.00002953 | 0.0345254 | 0.00340 | 0.0340 | 3.375 | 33.75 | 0.491310 | 345.25401 | 25.40106 | 0.03342245 | 3385.69518 | 33856.951 | 1 |
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| PRESSURE CONVERSIONTABLES | kPa | bar | MPa | psi | kg/cm² | mbar | in H2O | mm.hg | cm.hg | met H2O | pa | 1 | 0.01 | 0.001 | 0.145 | 0.01 | 10.0 | 4.021 | 7.525 | 0.752 | 0.102 | 1 000 | 100 | 1 | 0.1 | 14.503 | 1.02 | 1 000 | 402.164 | 752.47 | 75.247 | 10.211 | 100 000 | 1000 | 10 | 1 | 145.03 | 10.197 | | | | | | 1 000 000 | 6.895 | 0.069 | 0.007 | 1 | 0.07 | 68.947 | 27.72 | 51.884 | 5.188 | 0.7 | 6 895 | 98.066 | 0.981 | 0.0981 | 14.223 | 1 | 980.662 | 394.408 | 737.959 | 73.796 | 10.018 | 98 066 | 0.1 | 0.001 | 0.0001 | 0.014 | 0.001 | 1 | 0.402 | 0.752 | 0.075 | 0.0102 | 100 | 0.249 | 0.0025 | 0.00025 | 0.036 | 0.0025 | 2.486 | 1 | 1.871 | 0.187 | 0.025 | 249 | 0.133 | 0.0013 | 0.0001 | 0.019 | 0.0014 | 1.329 | 0.534 | 1 | 0.1 | 0.0136 | 133 | 1.328 | 0.013 | 0.001 | 0.193 | 0.014 | 13.29 | 5.34 | 10 | 1 | 0.136 | 1 328 | 9.807 | 0.098 | 0.01 | 1.422 | 0.099 | 98.066 | 39.37 | 73.796 | 7.379 | 1 | 9 807 | .001 | | | | | | | | | | 1 |
1 kpa= 0.145 psi | 1psi = 6.895 kpa | 1 kpa =4.021 inH2O | 1 H20 = 0.249 kpa | 1 kpa = 102 mmWater | 1mm Water =0.0098 kpa | 1 kpa = 0.102 MetWater | 1 met Water=9.807 kpa | 1 kpa = 0.01bar | 1 bar = 100kpa | 1 kpa = 0.001mpa | 1 mpa = 1000kpa | 1 kpa = .01kg/cm² | 1kg/cm² = 98.066kpa | 1 kpa =0.335 fthd H2O -20°C | 1 Ft HdH2O = 2.984 kpa | 1 kpa = 7.525 mmHG | 1 mm HG = 0.133kpa | 1 KN = 98.066kg | 1 Torr = 760 mmHg at 0°C | 10KN =980.66kg | 1 kg = 2.2046lbs |
SPECIFIC GRAVITY | HFO Heavy Fuel OilSG | 0.9962 | HFO Heavy Fuel Oil SG | 0.9782 @ 15°C | HFO Heavy Fuel Oil SG | 0.9419 @ 70°C | Diesel | 0.85 | Water | 1.00 | Sea Water | 1.0257 | P = Head (in met) x SGx 9.8066 |
CONVERSION OF TONSGAUGES | To get presssure inkg/cm2. | To get presssure in MPa usethe following | P = | Mass in kg's Area in cm2 |
| P = | Mass in kg's x0.098066 Area in cm2 |
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| NPT螺纹PT螺纹G螺纹和公制螺纹的区别 NPT,PT,G 都是管螺纹. NPT 是 National (American) Pipe Thread的缩写,属于美国标准的 60 度锥管螺纹,用于北美地区.国家标准可查阅 GB/T12716-1991 PT 是 Pipe Thread 的缩写,是 55度密封圆锥管螺纹,属惠氏螺纹家族,多用于欧洲及英联邦国家.常用于水及煤气管行业,锥度规定为 1:16. 国家标准可查阅GB/T7306-2000 G 是 55 度非螺纹密封管螺纹,属惠氏螺纹家族.标记为 G代表圆柱螺纹.国家标准可查阅 GB/T7307-2001 另外螺纹中的1/4、1/2、1/8 标记是指螺纹尺寸的直径,单位是英吋.行内人通常用分来称呼螺纹尺寸,一吋等于8分,1/4吋就是2分,如此类推.G就是管螺纹的统称(Guan),55,60度的划分属于功能性的,俗称管圆。即螺纹由一圆柱面加工而成。 ZG俗称管锥,即螺纹由一圆锥面加工而成,一般的水管接头都是这样的,国标标注为Rc 公制螺纹用螺距来表示,美英制螺纹用每英寸内的螺纹牙数来表示,这是它们*大的区别, 公制螺纹是60度等边牙型,英制螺纹是等腰55度牙型,美制螺纹60度。 公制螺纹用公制单位, 美英制螺纹用英制单位。 管螺纹主要用来进行管道的连接,其内外螺纹的配合紧密,有直管与锥管两种。公称直径是指所连接的管道直径,显然螺 纹直径比公称直径大。 1/4,1/2,1/8是英制螺纹的公称直径,单位是英寸。 |
| 英制管螺纹美制管螺纹对照表 英制管螺纹 | 英制管螺纹 | 美制管螺纹 | 规格 | 标准径 | 钻孔径 | 规格 | 标准径 | 有交牙部之长度(*小)中之毋螺牙内径 | 标准长度(*小)中之毋螺牙内径 | 规格 | 钻孔径 | *大 | *小 | 使用纹刀时 | 不用纹刀时 | NPT | NPS | 使用绞刀时 | 不用绞刀时 | PS 1/16-28 | 6.50 | 6.632 | 6.490 | PT 1/16-28 | 6.10 | 6.20 | 6.244 | 6.384 | 1/16 - 27 | 6.10 | 6.25 | 6.35 | PS 1/8-28 | 8.50 | 8.637 | 8.495 | PT 1/8-28 | 8.10 | 8.20 | 8.249 | 8.388 | 1/8 - 27 | 8.33 | 8.43 | 8.74 | PS 1/4-19 | 11.40 | 11.549 | 11.341 | PT 1/4-19 | 10.70 | 11.00 | 10.962 | 11.174 | 1/4 - 18 | 10.72 | 11.13 | 11.13 | PS 3/8-19 | 15.00 | 15.054 | 14.846 | PT 3/8-19 | 14.20 | 14.50 | 14.448 | 14.658 | 3/8 - 18 | 14.27 | 14.27 | 14.68 | PS 1/2-14 | 18.50 | 18.773 | 18.489 | PT 1/2-14 | 17.60 | 18.00 | 17.979 | 18.263 | 1/2 - 14 | 17.48 | 17.86 | 18.26 | PS 3/4-14 | 24.00 | 24.259 | 23.975 | PT 3/4-14 | 23.00 | 23.50 | 23.378 | 23.663 | 3/4 - 14 | 22.63 | 23.01 | 23.42 | PS 1-11 | 30.20 | 30.471 | 30.111 | PT 1-11 | 29.00 | 29.50 | 29.459 | 29.822 | 1 - 11-1/2 | 28.58 | 28.98 | 29.36 | PS 1-1/4-11 | 38.80 | 39.132 | 38.772 | PT 1-1/4-11 | 37.50 | 38.00 | 37.976 | 38.339 | 1-1/4-11-1/2 | 37.31 | 37.69 | 38.10 | PS 1-1/2-11 | 44.80 | 45.025 | 44.665 | PT 1-1/2-11 | 43.40 | 44.00 | 43.869 | 44.232 | 1-1/2-11-1/2 | 43.66 | 44.04 | 44.45 | PS 2 - 11 | 56.50 | 56.836 | 56.476 | PT 2 - 11 | 54.90 | 55.50 | 55.412 | 55.844 |
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