Attachment Factor for Flat Head - PV Elite - Help - Hexagon

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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