ISO 21809-3 Petroleum and Natural Gas Industries —External Coatings for Buried or Submerged Pipelines Used in Pipeline Transportation Systems — Field Joint Coatings – Testing Equipment
Annex AInspection of thickness A.2 EquipmentA.2.1 Magnetic, electromagnetic or ultrasonic measuring instrument, with ± 10 % reading accuracy,calibrated for the range of coating thickness being measured. Annex BHoliday detection test B.2 EquipmentB.2.1 Holiday detector, adjustable, high-voltage, with ± 10 % reading accuracy, equipped with a soundand/or light signal.B.2.2 Scanning electrode, in the form of a…
