扣型对照表
2021-10-06
来源：好走旅游网
API接头扣型与国内名称对照表国内油田现场叫法211×210211×210311×310公扣小头 直径母扣台肩内每英寸扣数/毫米径/毫米460.3574.61471.3187.71485.06103.58489.06110.33498.42119.064103.73124.614114.30134.91117.50150.814126.60165.104147.65187.334161.85204.79547.6268.20553.9777.78565.0790.48590.47119.064110.06141.684131.03153.994144.47180.184167.84204.39577.62102.79489.66110.33596.31123.834126.79150.024150.37173.83460.3574.61471.3187.71485.06103.584103.73124.614114.30134.914141.32163.914A11×4A10411×410231×230331×330431×430531×530631×630731×730831×830321×320421×420521×520621×620211×210211×210311×3104A11×4A10411×410511×510注意：1. 某些NC型接头可以与FH、IF型接头互换。
2. 国内的接头加工尺寸与API标准不完全一致，略有误差。3. IF=inetrnal flush 内平扣 FH=full hole 贯眼扣 REG=regular 正规扣
API标准接头扣型NC26=2 3/8\"IFNC31=2 7/8'IFNC38=3 1/2\"IFNC40=4\"FHNC44NC46=4\"IFNC50=4 1/2\"IFNC56NC61NC70NC772 3/8\"REG2 7/8\"REG3 1/2\"REG4 1/2\"REG5 1/2\"REG6 5/8\"REG7 5/8\"REG8 5/8\"REG3 1/2\"FH4\"FH=NC404 1/2\"FH5 1/2\"FH6 5/8\"FH2 3/8\"IF=NC262 7/8\"IF=NC313 1/2\"IF=NC384\"IF=NC464 1/2\"IF=NC505 1/2\"IF