The Pie Gauge is an American test body and is used to check the field direction in magnetic particle testing.
The following standards and guidelines describe or recommend the pie gauge:
ASME Section V, Article 7 (D250)
ASME Section V, Article 25, SA-275
ASTM E-1444
ASTM E-709
MIL-STD 1949
MIL-STD 2132
MIL-STD 271
NAVSHIPS 250-1500-1, ยง12.4.1.5
