Hi Kix, below is the obligations of a contractor under the CWB (w59.1) code in canada.
A lot of those codes are similar, so read between the lines as to who is responsible.
7.3 Obligations of Contractor
7.3.1
The Contractor shall be responsible for meeting all the quality control requirements of this Standard.
7.3.2
The Contractor shall comply with all requests of the Engineer to correct improper workmanship and to
remove and replace or correct all welds that do not comply with the contract drawings and specifications
or with this Standard.
7.3.3
In the event that faulty welding, or its removal for rewelding, will so damage the base metal that its retention
is not in accordance with the intent of the plans and specifications, the Contractor shall remove and replace
the damaged material or shall otherwise rectify the deficiency in a manner approved by the Engineer.
7.3.4
If nondestructive examination other than visual inspection is not specified in the original contract agreement
but is subsequently requested by the Purchaser, the Contractor shall perform any requested examination or
shall permit any examination to be performed in accordance with Clause 7.4. The Purchaser shall be
responsible for all associated costs, including handling, surface preparation, nondestructive examination,
and repair of defects other than those listed in Clauses 11.5.4.1 and 12.5.4.1, whichever is applicable, at
rates agreeable to both the Purchaser and the Contractor. However, if such examination discloses gross
nonconformance to this Standard, repair work shall be done at the Contractor's expense.
dh