DIN EN 3718:2012-08

The document specifies the requirements for inspection of tubes in metallic materials with an external diameter >= 5 mm. For other cases, the use of this document is by agreement between the manufacturer and the purchaser. The purpose of the ultrasonic inspection is the detection of defects within the wall thickness and at the outer and inner surface of the tube. The method will detect two dimensional defects in the longitudinal and circumferential directions perpendicular to the tube wall. Where inspection for other types of defects is required, this requirements shall be stated on the order.