PQR & WPS thickness limits

I have reviewed a PQR for GTAW+SMAW welding. Test coupon is 50mm thick with GTAW 25mm and SMAW 25mm welding. On the WPS thickness range is given as up to 200mm for both GTAW and SMAW.
How is this possible as more than 38mm test coupon qualifies for up to 200mm welding ??

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Refer ASME SECTION 9 table QW. 451.1

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