Elevate your quality control standards with the professional-grade
Elevate your quality control standards with the professional-grade G.A.L. Gage Co. Cat # 2 PRO Single Purpose Hi-Lo Welding Gauge. Proudly Made in the U.S.A., this premium wire-type inspection tool is expertly engineered for professional pipe fitters and welding inspectors to quickly verify internal high-lo misalignments and measure root weld fit-up gaps (ranging from 1/32” to 3/16”) after fit-up—particularly in critical piping applications where the backside of the weld is inaccessible. Designed to eliminate costly weld rejects and significantly boost operational productivity, the PRO series delivers uncompromising American-made accuracy and durability. Available in customizable Inch (Imperial) or Metric scale options.
The CAT-2PRO is a robust, single-purpose inspection gauge manufactured by G.A.L. Gage Co. to meet demanding industrial and code-compliance standards. Unlike multi-purpose gauges, this professional single-purpose tool focuses intently on internal high-low alignment and root gap verification, making it an essential instrument for pipefitters, welders, and Certified Welding Inspectors (CWIs).
Constructed from durable, high-quality stainless steel to withstand harsh workshop and field environments, the gauge features permanently laser-etched graduations for long-term legibility. It enables inspectors to verify alignment prior to tack welding, ensuring compliance with strict ASME, ANSI, and API welding codes
Certification
The Cat # 2Pro Professional Single Purpose HI-LO Welding Gauge can be certified. The certification is not included in the base price and is available at an additional cost. Just add it to cart if your quality control or compliance standards require it.
Features
- 100% Made in the U.S.A.: Manufactured to the highest standards of American craftsmanship, ensuring superior durability, reliability, and precision accuracy
- Internal Misalignment (Hi-Lo) Verification: Easily checks internal and external pipe mismatch after fit-up by rotating the gauge 90° against the pipe wall
- Precise Root Gap Measurement: Features an integrated tapered section to accurately measure root weld fit-up gaps from 1/32" to 3/16"
- Eliminates Costly Rejects: Prevents expensive rework by ensuring joints comply with strict code requirements before welding begins
- Flexible Scale Options: Available in user-selectable Inch or Metric configurations to match regional project standards
Applications
- Oil and Gas Pipeline Construction: Essential for field verification of root spacing and high-lo alignment on transmission pipelines
- Petrochemical and Refinery Maintenance: Ideal for rapid, reliable joint fit-up inspections during plant turnarounds and piping modifications
- Pressure Vessel Fabrication: Guarantees strict adherence to rigorous code specifications for internal alignment and joint preparation
- Professional Pipefitting and CWI Quality Control: A dependable, pocket-portable daily tool for Certified Welding Inspectors and master pipefitters
Specifications
| Measurement Scale | Available in Inch or Metric |
| Measurement Range (Gap) | 1/32” to 3/16” (or metric equivalent) |
| Primary Functions | Internal/external high-lo misalignment check and root weld gap verification |
| Measurement Scale | Available in Inch or Metric |
| Manufacturer | G.A.L. Gage Co. |
| Country of Origin | Made in the U.S.A. |
How to Use
- Check Internal Alignment (Hi-Lo): Insert the gauge legs into the internal root opening of the pipe joint. Read the mismatch indicator to verify whether the internal alignment meets allowable tolerances, preventing high-low mismatch defects
- Measure Root Weld Gap: Use the tapered wire-type section of the gauge to measure the root opening (fit-up gap) between pipe ends before tacking or final welding
- Verify Dimensions: Read the clearly engraved imperial or metric scale directly from the tool face to confirm that the gap and alignment satisfy code specifications
- Secure Settings: Utilize the built-in retaining screw mechanism to hold measurements in place for secondary reference or documentation when needed
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