Dimensions of lap joint stub ends ASME B16.9

Dimensions of lap joint stub ends ASME B16.9

Dimensions of lap joint stub ends ASME B16.9

Dimensions of lap joint stub ends ASME B16.9

NPS OD of Barrel Long Pattern Short Pattern Radius of  Diameter of
Max Min Length, F  Length, F Fillet, R Lap, G
1/2 22.8 20.5 76 51 3 35
3/4 28.1 25.9 76 51 3 43
1 35 32.6 102 51 3 51
1 ¼ 43.6 41.4 102 51 5 64
1 ½ 49.9 47.5 102 51 6 73
2 62.4 59.5 152 64 8 92
2 ½ 75.3 72.2 152 64 8 105
3 91.3 88.1 152 64 10 127
3 ½ 104 100.8 152 76 10 140
4 116.7 113.5 152 76 11 157
5 144.3 140.5 203 76 11 186
6 171.3 167.5 203 89 13 216
8 222.1 218.3 203 102 13 270
10 277.2 272.3 254 127 13 324
12 328 323.1 254 152 13 381
14 359.9 354.8 305 152 13 413
16 411 405.6 305 152 13 470
18 462 456 305 152 13 533
20 514 507 305 152 13 584
22 565 558 305 152 13 641
24 616 609 305 152 13 692
Notes:
1) Gasket face finish shall be in accordance with ASME B16.5 for raised face flanges.
2) The lap thickness T shall not be less than nominal pipe wall thickness.
3) When short pattern stub ends are used with larger flanges in Classes 300 and 600,with most sizes in Classes 900 and higher,and when long pattern stub ends are used with larger flanges in Classes 1500 and 2500,it may necessary to increase the length of the stub ends in order to avoid covering the weld with the flange.Such increases in length shall be a matter of agreement between the manufacturer and purchaser.
4) When special facings such as tongue and groove,male and female,etc.,are employed,additional lap thickness must be provided and such additional thickness shall be in addition to (not included in)the basic length F.

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