PH Tool ERVD (“Extended Range Variable Diameter”) Thickness Calibration Block

Extended Range Variable Diameter (ERVD™) Thickness Calibration Block is used as a versatile curved step block for thickness testing of pipe. Available in both Inch and Metric. 

The Inch ERVD™ Block covers the below diameters and steps -

• 3/4” NPS (1.050” OD) Steps .050, .150, .300”
• 1” NPS (1.315” OD) Steps .050, .200, .400”
• 2” NPS (2.375” OD) Steps .050, .250, .500”
• 4” NPS (4.500” OD) Steps .050, .250, .500, .750”
• Flat area for larger pipes. Steps .050, .200, .400, .600“
• “Bonus” Flat Step by using .750” block thickness
• 18 calibration thicknesses in total
• 2” NPS (2.375” OD) Steps .050, .250, .500”
• 4” NPS (4.500” OD) Steps .050, .250, .500, .750”
• Flat area for larger pipes. Steps .050, .200, .400, .600“
• “Bonus” Flat Step by using .750” block thickness
• 18 calibration thicknesses in total

The Metric ERVD™ Block covers the below diameters and steps -

• DN 20 (26.7mm OD) Steps 1.0, 4.0, 8.0mm
• DN 25 (33.4mm OD) Steps 1.0, 5.0, 10.0mm
• DN 50 (60.3mm OD) Steps 1.0, 6.0, 12.0mm
• DN 100 (114.3mm OD) Steps 1.0, 6.0, 12.0, 18.0mm
• Flat area for larger pipes. Steps 1.0, 5.0, 10.0, 15.0mm
• “Bonus” Flat Step by using 20mm block thickness
• 18 calibration thicknesses in total

Engraved markings show pipe diameters for each section. Narrow slots are cut completely through the block to create multiple points for calibration. The various distances from the OD to the outboard side of the slot represent different wall thicknesses. Thickness values are engraved directly on the block for convenient calibration.