Hello, we got a deformation in a 9 mm plate, S-275-J2, of a storage tank, for error some fitters tried to correct the problem applying flame straightening but they heating up 10 cm length directly above the weld, we decided to make it a hardness test and we got 205 and 225HB in the HAZ, our client says that we got to do a full PWHt in the weld, that have 2,5 m of length but only 10 cm was really affected, in API 582 says that the max hardness it can be 225 HB and 200 in crack-inducing environments (that is our client requirement), API 650 indicates that we can have a max of 22 HRC, It's really need it to do a PWHt?; The weld its in the upper rings ;Its this hardness value a critic indicator that the weld its going to fail?
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