---
title: "Grayloc Equipment Design and Calculations"
slug: "grayloc-equipment-design-and-calculations"
tags: ["FCM"]
updated: 2026-10-27T23:12:05Z
published: 2026-10-27T23:12:05Z
canonical: "ims-handbook.cenosco.com/grayloc-equipment-design-and-calculations"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://ims-handbook.cenosco.com/llms.txt
> Use this file to discover all available pages before exploring further.

# 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](/v414/docs/smx-torque-lookup).
  - Stud Size - auto filled with default value. See [Appendix B: Grayloc Calculations](/v414/docs/smx-torque-lookup).
  - Wrench Size - auto filled with default value. See [Appendix B: Grayloc Calculations](/v414/docs/smx-torque-lookup).
- 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](/v414/docs/smx-torque-lookup).
    - 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](/v414/docs/smx-torque-lookup).

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](/v414/docs/smx-torque-lookup).

![A screenshot of a cell phone  Description automatically generated](https://cdn.document360.io/e492a0e0-a4ba-4aca-8fc6-76b95f91fdf3/Images/Documentation/grayloc-equipment-design-and-calculations-image-9am1loqs.png?sv=2026-02-06&spr=https&st=2026-11-03T00%3A30%3A59Z&se=2026-11-03T01%3A30%3A59Z&sr=c&sp=r&sig=MHO83u8m2%2FENkvmg%2BDiP%2BiLZqEppvfmBQGq17Mp7t3c%3D)

Grayloc specs are determined based on design data.