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Letters on a reference line calling for a named inspection method.
Also known as: NDT symbol, Inspection symbol
Letters on a welding-style reference line specify a nondestructive test — RT for radiographic, UT for ultrasonic, MT for magnetic particle, PT for dye penetrant. Each finds a different kind of flaw, so the choice of method is a real engineering decision rather than a formality.
Specifies a nondestructive examination method by letter code on a reference line drawn like a welding symbol.
Contexts: Technical drawing
Names methods that detect different flaw types: radiographic and ultrasonic testing find internal defects, while magnetic particle and dye penetrant find surface-breaking ones.
Contexts: Technical drawing
A horizontal reference line with an arrow, carrying two capital letters in place of a weld shape.