Lap Joint – Short, Buttweld, ANSI, WCS (in)

300px-Data_lap_joint_bw
  • Dimensions per ANSI/ASME B16.9.
  • T = Pipe wall and lap thickness.
  • A lap joint is useful when the alignment of bolt holes is difficult, as when spools are to be attached to flanged nozzles of vessels.
PipeSize (NPS) M N PSTD PXS R
1/2 2 1 3/8 0.109 0.147 1/8
3/4 2 1 11/16 0.113 0.154 1/8
1 2 2 0.133 0.179 1/8
1 1/4 2 2 1/2 0.140 0.191 3/16
1 1/2 2 2 7/8 0.145 0.200 1/4
2 2 1/2 3 5/8 0.154 0.218 5/16
2 1/2 2 1/2 4 1/8 0.203 0.276 5/16
3 2 1/2 5 0.216 0.300 3/8
3 1/2 3 5 1/2 0.226 0.318 3/8
4 3 6 3/16 0.237 0.337 7/16
5 3 7 5/16 0.258 0.375 7/16
6 3 1/2 8 1/2 0.280 0.432 1/2
8 4 10 5/8 0.322 0.500 1/2
10 5 12 3/4 0.365 0.500 1/2
12 6 15 0.375 0.500 1/2
14 6 16 1/4 0.375 0.500 1/2
16 6 18 1/2 0.375 0.500 1/2
18 6 21 0.375 0.500 1/2
20 6 23 0.375 0.500 1/2
22 6 25 1/4 0.375 0.500 1/2
24 6 27 1/4 0.375 0.500 1/2

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