On the Suitability of Vibration Acceptance Criteria of Process Pipework

Table 5

Classification of cases and the number of cases in each category (1-sigma results, 68.27% confidence).

Category	Description	Number of cases
OO	OK vibration, OK stress	1048
OC	OK vibration, CONCERN stress	72
OP	OK vibration, PROBLEM stress	88
CO	CONCERN vibration, OK stress	87
CC	CONCERN vibration, CONCERN stress	54
CP	CONCERN vibration, PROBLEM stress	128
PO	PROBLEM vibration, OK stress	0
PC	PROBLEM vibration, CONCERN stress	1
PP	PROBLEM vibration, PROBLEM stress	122
Total		1600