NARROW GAP WELDING

Narrow Gap Welding (NGW) is a specialized welding technique designed to efficiently join thick materials—typically those over 50 mm in thickness—by utilizing a reduced groove width. This approach minimizes the amount of filler material required and reduces welding time, making it both cost-effective and suitable for high-precision applications.

Narrow Gap Welding involves preparing a joint with a narrow groove, often as small as 3 degrees in bevel angle, compared to the standard 37.5 degrees. This design allows for deeper penetration with fewer passes, resulting in reduced filler metal consumption and shorter welding times. The technique is particularly advantageous for welding thick materials, such as pressure vessels, nuclear power plant components, and heavy structural elements.