Enter the flat head attachment factor, calculated or selected from ASME Code, Section VIII, Division 1, Paragraph UG-34, Figure UG-34. Some typical attachment factors display below, however consult Paragraph UG-34 before using these values:
0.17 (b-1) |
Head welded to vessel with generous radius |
0.20 (b-2) |
Head welded to vessel with small radius |
0.20 (c) |
Lap welded or brazed construction |
0.13 (d) |
Integral flat circular heads |
0.20 (e f g) |
Plate welded inside vessel (check 0.33*m) |
0.33 (h) |
Plate welded to end of shell |
0.20 (I) |
Plate welded to end of shell (check 0.33*m) |
0.30 (j k) |
Bolted flat heads (include bending moment). To compute the required thickness of the bolted flat heads (type j and k), use the Flange module and model it as a blind flange. |
0.30 (m n o) |
Plate held in place by screwed ring |
0.25 (p) |
Bolted flat head with full face gasket |
0.75 (q) |
Plate screwed into small diameter vessel |
0.33 (r s) |
Plate held in place by beveled edge |