Machined Weld Rings

Imperial Weld Ring manufactures precision weld rings (also known as backing rings or chill rings) in both standard and custom sizes. Our weld rings ensure the proper root gap to allow full weld penetration in pipe or tube welding and expedite the welding process by eliminating the need for manual fit-up or spacer blocks. Machined to ±0.003", this precision fit prevents weld contamination inside of the pipe that could inhibit proper internal flow. We offer multiple standard spacer styles including long removable type spacers that compensate for the highest degree of pipe misalignment, short spacers that are readily consumed in the initial root pass, pressed type spacers that offer a root gap setting without the addition of foreign material and can be furnished on rings of all material types including non-ferrous metals (ex. Aluminum) on which stud welding is ineffective. Rings may also be supplied without spacers ("plain") which allows the welder to have more control over the size of the root gap.

Our custom weld rings can be machined to fit any standard or non-standard pipe or tube dimensions. We offer a variety of profiles that are designed to meet multiple pipe welding applications. Rings can be produced in mild steel, stainless steel, duplex, aluminum, copper-nickel (C71500 70/30, C70600 90/10), chrome-moly, nickel alloys, and titanium alloys to match parent pipe chemical and physical requirements.

Our weld rings are a trusted product and perform in critical applications. Our products meet all applicable industry standards including ASME, ASTM, AWS, Military, nuclear ASME NCA 3800, and OEM specific requirements. For more information about our custom weld rings, see the table below or contact us directly.

Machined Weld Ring Styles

Examples of Our Work

• Low Carbon Steel Weld Ring for Oil & Gas Pipeline Systems
• Orifice & Transition Rings for Steam Boiler Applications
• Custom Weld Spools for the Power Generation Industry

Machined Weld Ring Capabilities

Additional Information