TDC/BDC
Top Dead Centre/Bottom Dead Centre
TDC – Top Dead Centre is traditionally the position of an internal combustion engine’s piston when it is at the very top of its stroke.
BDC – Bottom Dead Centre is the opposite, when the piston is at the very bottom of its stroke.
In non-destructive testing, top dead centre is used as a datum for the location of indications.
Top dead centre is the position at the top of a horizontal pipe or vessel, on the centre line running vertically through the pipe or vessel, as shown in the figure.
Bottom dead centre is located 180° from top dead centre.
WHAT THE HEC?! articles are not intended to be the definitive account on the topic or acronym in question. Readers’ comments and contributions are welcomed. Email: ndtnews@bindt.org
BDC – Bottom Dead Centre is the opposite, when the piston is at the very bottom of its stroke.
In non-destructive testing, top dead centre is used as a datum for the location of indications.
Top dead centre is the position at the top of a horizontal pipe or vessel, on the centre line running vertically through the pipe or vessel, as shown in the figure.
Bottom dead centre is located 180° from top dead centre.
WHAT THE HEC?! articles are not intended to be the definitive account on the topic or acronym in question. Readers’ comments and contributions are welcomed. Email: ndtnews@bindt.org