Grayloc Equipment Design and Calculations

To do a Grayloc design:

• Go to the Grayloc Equipment Details page.

• Scroll to the Grayloc Design section.

• Click Edit.

In the Design section – specify the design input:

• Tightening Step 1

  • Clamp Size - used to determine Torque. See Appendix B: Grayloc Calculations.

  • Stud Size - auto filled with default value. See Appendix B: Grayloc Calculations.

  • Wrench Size - auto filled with default value. See Appendix B: Grayloc Calculations.

• Tightening Step 2

  • Hub Size - auto filled with default value, which is equal to the Clamp Size.

  • IMS determines minimum Torque (this is the 150% Torque). See Appendix B: Grayloc Calculations.

    • Click the arrow < to apply the calculated Torque value, or

    • Input another value. Note: A warnings is given if this is below the calculated value.

  • Also 50% Torque, 100% Torque, and 200% Torque is calculated.

  • Seal Ring size (dropdown) – This does not influence the Torque calculation but is needed to determine the Stand Off Range. See Appendix B: Grayloc Calculations.

Note: Predefined Default values can be changed.

• Recommended Specs– Flange management recommendations:

  • Stud Grade (dropdown)

  • Nut Material (dropdown)

  • Clamp material (dropdown)

  • Shrouded ("yes"/"no")

  • Hub Material (dropdown)

  • Seal ring material (dropdown)

  • Bolt Quantity

  • Hub Thickness

  • Seal Angle

  • Seal length

  • Non-Erosion Ring (dropdown)

  • Heat Trace LOTO – Lock Out Tag Out

  • Bolting Tool

  • Drawing

  • Pipe Schedule

• Click Save when done.

IMS determines the Specs (e.g. Stand Off Range, Tolerance, Reading over ¼ Ball, Seal Ring Range, HC, and Torque Values) from the above defined values. See Appendix B: Grayloc Calculations.