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Retest of Production Test plate for vessel
- Thread starter ahmadire
- Start date
BenStewart
Mechanical
Which code has your vessel been designed to and what are the materials of construction?
Why would you want your PTPs to not reflect the heat treatment your vessel has seen? Some codes have means of waiving the requirement for a PTP, i.e. Annex D D.7.2.2 of PD5500, but a project specification may govern and mandate PTPs.
Why would you want your PTPs to not reflect the heat treatment your vessel has seen? Some codes have means of waiving the requirement for a PTP, i.e. Annex D D.7.2.2 of PD5500, but a project specification may govern and mandate PTPs.
david339933
Industrial
ASME Sec. VIII Div. 1 - UG-84(j) - "If the vessel test plate fails to meet the impact requirements, the welds represented by the plate shall be unacceptable. Reheat treatment and retesting or retesting only are permitted".
Material must be from one of the heats used in the vessel.
Shall also be welded at the same time as the vessel, or as close to the start of welding as possible.
Sec.VIII only....as you don't state a construction code.
Material must be from one of the heats used in the vessel.
Shall also be welded at the same time as the vessel, or as close to the start of welding as possible.
Sec.VIII only....as you don't state a construction code.
- Thread starter
- #4
The Material is A516-70 and the construction code is ASME VIII Div 2.
Since the PTP is tested after PWHT of vessel, after failing the Impact test the vessel has been fully fabricated and there is no Plate of the same heat which vessel has been made of.
Since the PTP is tested after PWHT of vessel, after failing the Impact test the vessel has been fully fabricated and there is no Plate of the same heat which vessel has been made of.
ahmadire, first thing you need to do is see what Div 2 requires. Second, sometimes the material supplier can supply additional material from the same heat, if you don't have any left.
You may be in big trouble here...
Regards,
Mike
The problem with sloppy work is that the supply FAR EXCEEDS the demand
You may be in big trouble here...
Regards,
Mike
The problem with sloppy work is that the supply FAR EXCEEDS the demand
- Thread starter
- #6
david339933
Industrial
PCC2 is for in-service vessels......you have not completed fabrication.
pradipgoswami
Materials
Hello Ahmadire,
Please see the following clause of Sec-VIII, DIV-2, which allows re-test to be permitted. One need to read through all the appropriate clauses get the right direction.
To summarize code allows Re-Test on the same coupon plate.
3.11.7.6 Retests.
(a) Absorbed Energy Criteria – If the absorbed energy criteria are not met, retesting in accordance with the applicable
procedures of SA-370 shall be permitted.
Thanks.
Pradip Goswami,P.Eng.IWE
Welding & Metallurgical Specialist
Ontario,Canada.
ca.linkedin.com/pub/pradip-goswami/5/985/299
Please see the following clause of Sec-VIII, DIV-2, which allows re-test to be permitted. One need to read through all the appropriate clauses get the right direction.
To summarize code allows Re-Test on the same coupon plate.
3.11.7.6 Retests.
(a) Absorbed Energy Criteria – If the absorbed energy criteria are not met, retesting in accordance with the applicable
procedures of SA-370 shall be permitted.
Thanks.
Pradip Goswami,P.Eng.IWE
Welding & Metallurgical Specialist
Ontario,Canada.
ca.linkedin.com/pub/pradip-goswami/5/985/299
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