Dear Experts,
A CRO (Corrosion resistant weld overlay) PQR is done on pipe in 5G position. Chemical analysis is to be done as part of the PQR and as per ASME Sec IX Figure QW-462.5(b), for 5G and 6G position the locations are mentioned for chemical analysis. However there is a note states "specimen required for a minimum of three locations".
kindly advise what does it mean. do we need to extract the chemical analysis specimen at least three location (three specimens) or a single specimen at uphill position is sufficient as mentioned in QW 405.4
A CRO (Corrosion resistant weld overlay) PQR is done on pipe in 5G position. Chemical analysis is to be done as part of the PQR and as per ASME Sec IX Figure QW-462.5(b), for 5G and 6G position the locations are mentioned for chemical analysis. However there is a note states "specimen required for a minimum of three locations".
kindly advise what does it mean. do we need to extract the chemical analysis specimen at least three location (three specimens) or a single specimen at uphill position is sufficient as mentioned in QW 405.4