Middle flange bolt tensile stress verification per Practical Valve Design Manual Table 5-112. Formula: σL = QL/SL, QL = max(Q', Q'')
Open Calculator →
QL = max(Q', Q'') considers both operating and preloading cases.
Q' = QDJ + QDF + QDT with medium, sealing and elastic components.
Q'' = QYJ from gasket seating pre-stress per Table 3-24.
ASTM A193 B7 stud bolts with [σL]=172 MPa preset.
QL=24942 transcription typo in book corrected to 24642.
Instant verdict: σL vs. allowable per ASME II-D.
Input gasket diameter DDP, width bDP and factor mDP.
Calculate QDJ, QDF, QDT for total operating force Q'.
Compute QYJ and compare to Q' for design load QL.
Check σL = QL/SL against ASME II-D allowable.
Input allowable tensile stress [σL] for body material.
Specify corrosion allowance C based on service conditions.
Compare actual body thickness SB to calculated S'B.
Enter your design parameters and get instant verification results.
Open Calculator →