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The industry standard is referred to as the ten percent rule, a practice that requires 10% of the product tolerance is divided between the GO AND NOGO gauges.
Gauges used against cast iron, aluminum and stainless/duplex steels have faster wear due to lapping effect of these material.
At Northern Gauge we provide a solid ring design because we know that it is superior to AGD (American Gauge Design) for the following reasons:
4-1/2″ Buttress Casing Standoff to End of Pipe, 5″ to 13-3/8″ Buttress Casing Standoff Against End of Pipe
How to use API 7-2 Thread Gauges
Gauge material and heat treatment plays a very important role in obtaining a dimensionally stable and long life gauge.
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