ASME IX PQR Pipe diameters

[spunky]

Hello
Please can someone clear up a query have about qualification range for pipe diameter in ASME IX. I want produce a PQR to cover 75mm (3") and 100mm (4") welded in 6G position, carbon steel. Can someone please point me to the right section of the code where it tells me what dia pipe tested will qualifiy the range 3" to 4". If the procedure is qualified using 4" pipe, will this also qualifiy 3" or is the 4" miniumum.

Thanks

Spunky

[Admin]

Hi Spunky
do not get procedures and welder quals mixed up
procedures are not diameter limited (covers all in theory) Welder qualifications use the ranges you suggested >75mm ‘OD’
R 

[spunky]

Ok, found it page 148, QW-452.3
Now my question is if the qualification is done with a 100mm test piece will that qualify 73mm to unlimited or 100mm to unlimited.

Thanks

[cassgazz]

Spunky,

As already mentioned, diameter is for qualification of welders only.
See QW202.2, which gives information of groove & fillet welds. This then refers you to Table QW451 for limits of procedure qualification.

[Author]

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