ASME Code Calculator

This page calculates the approval range for both welding procedures and welder approvals. It was developed for groove welds but fillet welds follow the same basic rules except parent metal thickness is not considered, but welding positions for performance qualification should be correct and also diameter limits.

Note: Diameter limits don't apply to fillet welds if qualified by a groove weld

Enter test piece data above horizontal line. Click the 'Calculate Approval Range' button and the range of approval will appear below it.

Min Thickness Tmin:     Max Thickness Tmax: 

Max Thickness Of Weld Deposit t:    No Minimum
Note GMAW In Dip Transfer Mode restricts max deposit size

Position: 

Special Requirements: 

Diameters: All Diameters and product forms approved Ref QW211

Joint Type: All Joint Types Approved, a double sided weld will approve single sided.

Fillet Welds: All weld sizes and parent metal thickness approved QW451.3
Note Fillet welds must be approved by a groove weld for pressure retention

Welder Qualification Approval Range

Max Thickness Of Weld Deposit t:   No Minimum

Min Diameter:   No Maximum Diameter.
Any Part containing a weld prep is subject to Diameter Limits

Welding Positions QW461

Plate & Pipe > 610mm:

Pipe < 610mm:

Fillet Welds: All weld sizes and parent metal thickness approved QW451.3

Single Sided Welds: Approve double sided welds and welds with backing

Double Sided Welds: Approve welds with backing and vice versa

• ASME 9 Introduction
• Procedure Qualification Record (PQR)
• Welding Performance Qualification (WPQ)
• ASME definitions for welding processes, consumables and welding positions