PART 4: POSITION VARIABLES
* For the ASME PQR running without CVN impact test:
Any PQR position can qualified for ALL position. (QW 203)
* For the ASME PQR running with CVN impact test:
It’s advised to run PQR 6G (or 3G, 5G) position for qualifying all the positions of piping welding onsite/workshop. Hence, there will be no any issue later on.
* For the AWS D1.1 PQR, to qualified all position, at least Three (3) PQR 2G/3G/4G qo be carried out as per Tab 4.1
But there’re still flexibility gap if the project can optimize the Rule of construction like ABS/DNV/BV –> Two Highest/Lowest Heat input positions (3G/2G) PQR can qualify for all positions.
Note: the others position like Special position or 6GR will be discussed in separate topic with T-Y-K tubular joint (AWS D1.1 only)!