Pipe gauge (MTG) – Mechanical Thickness Gauge for Pipes Pipe gauge - MTG Mechanical Thickness Pipe Gauge Specifications MTG-Pipe – 1.2 m Weight 30 kg Height 840 mm Width 1250 mm Depth 420 mm Max thickness to be measured 140 mm Max outer diameter 666 mm Min inner diameter 15 mm Standards EN 13467 Thermal insulating products for building equipment and industrial installations – Determination of dimensions, squareness and linearity of preformed pipe insulation