API round thread coupling---Dimensions, tolerances and masses
Label 1 | Size a | outside diameter | Min length mm | Diameter of recess | Width of bearing face | Mass kg | ||
OD mm | Wb,c mm | Short NL | Long NL | Qd mm | b mm | Short | Long | |
1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |
4-1/2 5 5-1/2 6-5/8 7 9-5/8 13-3/8 | 114.30 127.00 139.70 168.28 177.80 244.48 339.72 | 127.00 141.30 153.67 187.71 194.46 269.88 365.12 | 158.75 165.10 171.45 184.15 184.15 196.85 203.20 | 177.80 196.85 203.20 222.25 254.00 266.70 - | 116.68 129.38 142.08 170.66 180.18 248.44 343.69 | 3.97 4.76 3.18 6.35 4.76 6.35 5.56 | 3.62 4.66 5.23 9.12 8.39 18.03 25.66 | 4.15 5.75 6.42 11.34 21.67 25.45 - |
a The size designation for the coupling is the same size designation for the pipe on which the coupling is used. B Groups1,2 and 3--Tolerance on outside diameter W,±1% but not greater than±0.38mm C Group4--Tolerance on outside diameter W,±1% but not greater than+3.18 –1.59mm. d Tolerance on diameter of recess Q ,for all groups is+0.79 0mm. |
Casing coupling