55度管螺纹标准尺寸对照表
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55°圆柱管螺纹的型式和尺寸
55度圆锥管螺纹的实际加工尺寸。
55°圆柱管螺纹的型式和尺寸British Pipe Thread (惠氏管螺纹) -- 圆柱(BSPP/BSPF)螺纹代号基本尺寸大径mmd=D螺距mmp每英寸牙数tpi中径mmd2=D2小径外螺纹d3牙型高度H1底孔尺寸mmG 1/8 1/8"9.7280.907289.1478.5660.5818.7 G 1/4 1/4"13.157 1.3371912.30111.4450.85611.6 G 3/8 3/8"16.662 1.3371915.80614.950.85615 G 1/2 1/2"20.955 1.8141419.79318.631 1.16219 G 5/8 5/8"22.911 1.8141421.74920.587 1.16220.75 G 3/4 3/4"26.441 1.8141425.27924.117 1.16224.5 G 7/8 7/8"30.201 1.8141429.03927.877 1.16228 G 1 1"33.249 2.3091131.7730.291 1.47930.5 G 1 1/8 1 1/8"37.897 2.3091136.41834.939 1.47935 G 1 1/4 1 1/4"41.91 2.3091140.43138.952 1.47939.5 G 1 3/8 1 3/8" 44.323 2.3091142.84441.365 1.47941.5 G 1 1/2 1 1/2"47.803 2.3091146.32444.845 1.47945 G 1 3/4 1 3/4"53.746 2.3091152.26750.788 1.47951 G 2 2"59.614 2.3091158.13556.656 1.47957 G 2 1/4 2 1/4"65.71 2.3091164.23162.752 1.47963 G 2 1/2 2 1/2"75.184 2.3091173.70572.226 1.47972.5 G 2 3/4 2 3/4"81.534 2.3091180.05578.576 1.47979 G 3 3"87.884 2.3091186.40584.926 1.47985.G 3 1/4 3 1/4"93.98 2.3091192.50191.022 1.47991 G 3 1/2 3 1/2"100.33 2.3091198.35197.372 1.47997.75 G 3 3/4 3 3/4"106.68 2.30911105.201103.722 1.479104 G 4 4"113.03 2.30911111.55110.072 1.479110.5 G 4 1/2 4 1/2"125.73 2.30911124.251122.772 1.479123 G 55"138.43 2.30911136.951135.472 1.479136 G 5 1/2 5 1/2"151.13 2.30911149.651148.172 1.479148.5 G 6 6"163.83 2.30911162.351160.872 1.479161.555°圆锥管螺纹型式和尺寸55°圆锥管螺纹(BSPT)螺纹代号基本尺寸英寸大径mmd=D螺距mmp每英寸牙数tpi中径mmd2=D2小径外螺纹d3牙型高度H1圆弧尺寸r底孔尺寸mmR 1/16 1/16" 7.723 0.907 28 7.142 6.561 0.581 0.125 6.4 R 1/8 1/8" 9.728 0.907 28 9.147 8.566 0.581 0.125 8.4 R 1/4 1/4" 13.157 1.337 19 12.301 11.445 0.856 0.184 11.2 R 3/8 3/8" 16.662 1.337 19 15.806 14.950 0.856 0.184 14.75 R 1/2 1/2" 20.955 1.814 14 19.793 18.631 1.162 0.249 18.25 R 3/4 3/4" 26.441 1.814 14 25.279 24.117 1.162 0.249 23.75 R 1 1" 33.249 2.309 11 31.77 30.291 1.479 0.317 30 R 1 1/4 1 1/4" 41.910 2.309 11 40.431 38.952 1.479 0.317 38.5 R 1 1/2 1 1/2" 47.803 2.309 11 46.324 44.845 1.479 0.317 44.5 R 2 2" 59.614 2.309 11 58.135 56.656 1.479 0.317 56 R 2 1/2 2 1/2" 75.184 2.309 11 73.705 72.226 1.479 0.317 71 R 3 3" 87.884 2.309 11 86.405 84.926 1.479 0.317 85.5 R 4 4" 113.030 2.309 11 111.551 110.072 1.479 0.317 110.5 R 5 5" 138.430 2.309 11 136.951 135.472 1.479 0.317 136 R 6 6" 163.830 2.309 11 162.351 160.872 1.479 0.317 161.5管螺纹的基本尺寸表（3-29）G1/2 、ZG1/2 、锥管螺纹的基本尺寸表（3-28）1/2PT 、1/2NPT 、螺纹-各国的不同标记方法一.用螺纹密封的管螺纹（GB 7306与ISO7/1相同）1. 用螺纹密封的管螺纹不加填料或密封质就能防止渗漏。
55°圆柱管螺纹的型式和尺寸螺纹代号基本尺寸大径mmd=D螺距mmp每英寸牙数tpi中径mmd2=D2小径外螺纹d3牙型高度H1底孔尺寸mmG 1/8 1/8"9.7280.907289.1478.5660.5818.7 G 1/4 1/4"13.157 1.3371912.30111.4450.85611.6 G 3/8 3/8"16.662 1.3371915.80614.950.85615 G 1/2 1/2"20.955 1.8141419.79318.631 1.16219 G 5/8 5/8"22.911 1.8141421.74920.587 1.16220.75 G 3/4 3/4"26.441 1.8141425.27924.117 1.16224.5 G 7/8 7/8"30.201 1.8141429.03927.877 1.16228 G 1 1"33.249 2.3091131.7730.291 1.47930.5 G 1 1/8 1 1/8"37.897 2.3091136.41834.939 1.47935 G 1 1/4 1 1/4"41.91 2.3091140.43138.952 1.47939.5 G 1 3/8 1 3/8" 44.323 2.3091142.84441.365 1.47941.5 G 1 1/2 1 1/2"47.803 2.3091146.32444.845 1.47945 G 1 3/4 1 3/4"53.746 2.3091152.26750.788 1.47951 G 2 2"59.614 2.3091158.13556.656 1.47957 G 2 1/4 2 1/4"65.71 2.3091164.23162.752 1.47963 G 2 1/2 2 1/2"75.184 2.3091173.70572.226 1.47972.5 G 2 3/4 2 3/4"81.534 2.3091180.05578.576 1.47979 G 3 3"87.884 2.3091186.40584.926 1.47985.G 3 1/4 3 1/4"93.98 2.3091192.50191.022 1.47991 G 3 1/2 3 1/2"100.33 2.3091198.35197.372 1.47997.75 G 3 3/4 3 3/4"106.68 2.30911105.201103.722 1.479104G 4 4"113.03 2.30911111.55110.072 1.479110.5 G 4 1/2 4 1/2"125.73 2.30911124.251122.772 1.479123 G 55"138.43 2.30911136.951135.472 1.479136 G 5 1/2 5 1/2"151.13 2.30911149.651148.172 1.479148.5 G 6 6"163.83 2.30911162.351160.872 1.479161.555°圆锥管螺纹的型式和尺寸螺纹代号基本尺寸大径mmd=D螺距mmp每英寸牙数tpi中径mmd2=D2小径外螺纹d3牙型高度H1圆弧尺寸r底孔尺寸mmR 1/16 1/16" 7.723 0.907 28 7.142 6.561 0.581 0.125 6.4R 1/8 1/8" 9.728 0.907 28 9.147 8.566 0.581 0.125 8.4R 1/4 1/4" 13.157 1.337 19 12.301 11.445 0.856 0.184 11.2 R 3/8 3/8" 16.662 1.337 19 15.806 14.950 0.856 0.184 14.75 R 1/2 1/2" 20.955 1.814 14 19.793 18.631 1.162 0.249 18.25 R 3/4 3/4" 26.441 1.814 14 25.279 24.117 1.162 0.249 23.75R 1 1" 33.249 2.309 11 31.77 30.291 1.479 0.317 30 R 1 1/4 1 1/4" 41.910 2.309 11 40.431 38.952 1.479 0.317 38.5 R 1 1/2 1 1/2" 47.803 2.309 11 46.324 44.845 1.479 0.317 44.5R 2 2" 59.614 2.309 11 58.135 56.656 1.479 0.317 56 R 2 1/2 2 1/2" 75.184 2.309 11 73.705 72.226 1.479 0.317 71R 3 3" 87.884 2.309 11 86.405 84.926 1.479 0.317 85.5R 4 4" 113.030 2.309 11 111.551 110.072 1.479 0.317 110.5R 5 5" 138.430 2.309 11 136.951 135.472 1.479 0.317 136R 6 6" 163.830 2.309 11 162.351 160.872 1.479 0.317 161.51、密封管螺纹（R）密封管螺纹不加填料或密封质就能防止渗漏。
