螺纹尺寸

镀锌管外经塑料管外经公制ZG英制NPT公制ZG英制NPT公制ZG英制NPT公制ZG英制NPT公制ZG英制NPT公制ZG英制NPTG（直牙）公制ZG（锥牙）英制NPT公制ZG英制NPTG公制ZG英制NPT公制ZG英制NPT公制ZG英制NPT公制ZG英制NPT公制ZG英制NPT公制ZG英制NPT公制ZG英制NPT1/16287.7231/82828279.7281/413.513.6213.1613.6212.6613.131.301.430.861.131.341.4119191813.1613.6213.1612.3012.4911.4511.366.005.79φ11.2φ11.19.70——4.494.107.26——3/81717.1216.6617.0616.1316.551.331.450.861.131.341.4119191816.6617.0616.6615.8115.9314.9514.806.406.10φ14.7φ14.510.10——4.794.327.56——DN1521.32021.5820.9621.2220.2720.551.591.731.161.451.811.8114141420.9621.2220.9619.7919.7718.6318.328.208.13φ18.3φ17.913.20——4.524.487.28——DN2026.82527.0426.4126.5725.6225.851.671.761.151.451.811.8114141426.4126.5726.4425.2825.1224.1223.679.508.61φ23.6φ23.214.50——5.244.757.99——DN2533.53234.0533.2533.2332.3832.381.892.021.481.772.312.21111111.533.2533.2333.2531.7731.4630.2929.6910.4010.16φ29.7φ29.216.80——4.504.607.28——DN3242.34042.7141.9141.9940.8541.102.032.051.481.772.312.21111111.541.9141.9941.9140.4340.2238.9538.4512.7010.67φ38.3φ37.919.10——5.504.838.27——DN40485048.6047.8048.0546.7447.172.032.051.481.772.312.21111111.547.8048.0547.8046.3246.2944.8544.5212.7010.67φ44.1φ43.919.10——5.504.838.27——21159.6142-1/21175.18431187.884411113.03BSPT,BSP是英国规格的椎度螺纹NPT是英国规格的椎度螺纹Pt是日本旧JIS规格椎度螺纹，55度，属于英制锥螺纹，是管用平行螺纹，相当于R，RcZG是密封用管螺纹，俗称管锥，老国标标为RcG是管螺纹的统称，俗称管圆，非螺纹密封管螺纹，是圆柱螺纹？细节尺寸和ZG一样nipple是指单头丝的意思英制管螺纹是细牙螺纹，因为粗牙螺纹的牙深大，会严重的降低所切螺纹外径管子的强度。公制螺纹/美制螺纹为60度，英制螺纹为55度55度圆柱管螺纹代号：中国/法国/苏联G，日本G、PF，英国BSP、BSPP，德国R（内螺纹），K（外螺纹），ISORp55度圆锥管螺纹代号：中国ZG、R（外螺纹），英国BSPT、R，Rc，法国G（外螺纹）、R（外螺纹）德国R（外螺纹）ISOR，Rc日本Pt、R60度圆锥管螺纹：中国Z（旧），NPT（新），美国NPT，苏联B建议底孔有效长度基准距离内牙数有效距离内牙数牙距每寸牙数大径中径小径基准距离尺寸代号理想管道外经有效距离内全部为全深牙最小外经4-5全深牙时最小外经1-2全深牙时最小壁厚4-5半深牙时牙深