API接头扣型与尺寸对照表

附 表

一、API接头扣型与国内名称对照表

国内油田API标准接头扣型每英寸公扣小头母扣台肩现场叫法扣数直径/毫米内径/毫米211х210NC26 2 3/8"IF460.3574.61 211х210NC31 2 7/8"IF471.3187.71 311х310NC38=3-1/2"IF485.06103.58

NC40=4"FH489.66110.33

NC44498.42119.06 4A11х4A10NC46= 4"IF4103.73124.61 411х410NC50=4 1/2"IF4114.3134.91

NC56 4117.5150.81

NC61 4126.6165.1

NC704147.65187.33

NC774161.85204.79

2 3/8"REG547.6268.2

231х230 2 7/8"REG553.9777.78 331х330 3 1/2"REG565.0790.48 431х430 4 1/2"REG590.47119.06 531х530 5 1/2"REG4110.06141.68 631х630 6 5/8"REG4131.03153.99 731х7307 5/8"REG4144.47180.18 831х8308 5/8"REG4167.84204.39 321х320 3 1/2"FH577.62102.79

4"FH=NC40489.66110.33 421х420 4 1/2"FH596.31123.83 521х520 5 1/2"FH4126.79150.02 621х620 6 5/8"FH4150.37173.83 211х210NC26 = 2 3/8"IF460.3574.61 211х210NC31 = 2 7/8"IF471.3187.71 311х310NC38 = 3 1/2"IF485.06103.58 4A11х4A10NC46= 4"IF4103.73124.61 411х410NC50=4 1/2"IF4114.3134.91 511х510 5 1/2"IF4141.32163.91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标准接头不完全一致，略有误差。

3、IF=internal flush 内平扣

4、Fh=full hole 贯眼扣

5、REG=regular 正规扣