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What does PWHT stand for?

PWHT stands for Post-Weld Heat Treatment

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Samples in periodicals archive:

However, welding of P91 and T91 alloy requires a precise heat control during welding and subsequent post-weld heat treatment (PWHT), and the welds between dissimilar metals should be minimized and if it is absolutely necessary it must be very carefully designed.
As part of its expansion, MIS Arabia recently commissioned additional large size post-weld heat treatment furnace, which was 9 m high, 8.
The new Excalibur stick electrodes are specifically designed for all-position welding of low-alloy steels and are capable of exceeding AWS minimum-strength requirements after long term post-weld heat treatment.
As part of the expansion, MIS Arabia recently commissioned additional large size post-weld heat treatment furnace with 9 m height, 8.
Bid bond: QR40,000, Fee: QR200 Details: Qatar Petroleum, Contracts Depart-ment, Corporate Division, PO Box 3212, Royal Plaza, G Wing, 4th Floor, Room G11, Doha, Qatar Tel: + +974 4774324 Closing date: May 24 Post-weld heat treatment Tender no: GT09105900 Description: Post-weld heat treatment on call-off basis for QP facilities.