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Length of pipe to be used in PQR

Length of pipe to be used in PQR

Length of pipe to be used in PQR



We prepared a welding piece for pqr flange A350-LF2 to pipe A333-6 Thk 8mm filler Er80sni1 , in UG-84 not mentioned the length of pipe to be cut for sending to lab
350mm is enough???

RE: Length of pipe to be used in PQR

Look in Section IX for answer - not Section VIII.

RE: Length of pipe to be used in PQR


Refer to code ix ... 10x10 but thk is 8 mm

RE: Length of pipe to be used in PQR

You are very confused. Consult a welding engineer.


RE: Length of pipe to be used in PQR

Dear Ali,wavey

Kindly find below notes:

1-length and number of test coupon shall consider in PQR preparation.

2-At the first you shall refer to project specification. if there is note any note in spec refer to related welding code./standard such as AWS D1.1/ASME IX ,ISO 15614.

3-ASME IX has not define special length for pipe test coupon. According to QW-210 : "The dimensions of the test coupon shall be sufficient to provide the required test specimens." length of pipe test coupon shall be sufficient to obtain the longest specimens such as tensile and bend.

4-25cm is good for length of pipe test coupon. if you face shortage material may reduce length but it shall be consider that if length of test coupon is very short its affect on Interpass temperature and cooling rate and affect on hardness and impact test result.

5- if external or internal clamp used for fit-up, length of clamp shall be consider.
6- for such diameter such as 32",42",etc its prefer to cut 50cm test coupon.

Best Regards,wavey2

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