This welding gauge is suitable for the detection of boilers, bridges, ships, pressure ... vessels and oil pipes. This welding gauge is suitable for the detection of boilers, bridges, ships, pressure vessels and ... oil pipes.Bridge Cam Gauge MG-8• Angle of preparation, 0º to 60º• ... weld length• Misalignment (high-low) MG-8 bridge cam welding gauge/cam type gage