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.

Grayloc specs are determined based on design data.