... 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• Excess weld ... • Fillet weld length• Misalignment (high-low) MG-8 bridge cam welding gauge/cam type gage