Consumable Insert EB Sizing Calculator

Size EB (extended backing) consumable inserts for GTAW pipe root passes per ASME Section IX and AWS specifications

Input Parameters

Results

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Insert Thickness
in
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Insert Height
in
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Insert Inner Diameter
in
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Approximate Insert Weight
oz
Note: Consumable inserts melt into the root pass, providing consistent full penetration. They are mandatory for many nuclear (ASME III) and high-purity piping applications.

Reference

Consumable Insert Classes per AWS A5.30 / ASME SFA-5.30: Class 1: J-shaped, most common for pipe GTAW root passes Class 2: Y-shaped, alternative profile Class 3: Rectangular, for thin-wall applications Class 5: Solid round wire ring Insert thickness: 0.030-0.065" depending on wall thickness Insert provides consistent root reinforcement and full penetration