Version: February 2026

All modules incorporate the requirements of PD 5500:2024 up to and including Amendment 2, September 2025. In addition to minor enhancements, the following modifications have been made:

• Shells - Internal Pressure: Version 24.02.01

None.

• Shells - External Pressure: Version 24.02.01

None.

• Nozzles & Openings: Version 24.02.01

None.

• Saddle & Ring Supports: Version 24.02.01

None.

• Local Loads on Cylinders: Version 24.02.01

None.

• Local Loads on Formed Heads: Version 24.02.01

None.

• Bolted Flanged Connections: Version 24.02.01

• If the bolting is insufficient, the software will use the average of the required and available bolt area to calculate W, instead of the required bolt area..

• Bolted or Welded Flat Heads: Version 24.02.01

• If the bolting is insufficient, the software will use the average of the required and available bolt area to calculate W, instead of the required bolt area.

• Fixed Tubesheets: Version 24.02.01

• If the bolting is insufficient, the software will use the average of required and available bolt area to calculate W, instead of the required bolt area.

• Floating Tubesheets: Version 24.02.01

• If the bolting is insufficient, the software will use the average of required and available bolt area to calculate W, instead of the required bolt area.

• U-Tube Tubesheets: Version 24.02.01

None.

• External Loads on Vertical Vessels: Version 24.02.01

None.

• External Loads on Horizontal Vessels: Version 24.02.01

None.

• Cyclic Loading: Version 24.02.01

None.