Free CWI Part C D1.1 flashcards

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Flashcard · Qualification

A WPS meets Clause 5 in full. What does that exempt the contractor from?

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A WPS meets Clause 5 in full. What does that exempt the contractor from?: Only the procedure test weld under Clause 6 Part B, so no PQR is needed. Nothing else is waived.AWS D1.1/D1.1M:2025 Clause 5, prequalification; Clause 6 Part B
Name the things a prequalified WPS still needs.: A written WPS, welders qualified under Clause 6 Part C, and full compliance with Clauses 7 and 8. CVN testing under Clause 6 Part D too if the contract calls for it.AWS D1.1/D1.1M:2025 Clause 5; Clause 6 Parts C and D; Clauses 7 and 8
Which items must all conform to Clause 5 for a WPS to be prequalified?: Process, base metal, filler metal match, joint detail with its tolerances, preheat and interpass, process variables, and position. One miss and it is not prequalified.AWS D1.1/D1.1M:2025 Clause 5, prequalification of WPSs
One variable on a WPS falls outside Clause 5. What are the contractor's two options?: Change the WPS so it conforms to Clause 5, or qualify it by test under Clause 6 Part B.AWS D1.1/D1.1M:2025 Clause 5; Clause 6 Part B, WPS qualification
What is the classic process mode that can't be prequalified, and why?: Short-circuit transfer GMAW. It is prone to incomplete fusion, so a WPS using it must be qualified by test.AWS D1.1/D1.1M:2025 Clause 5, prequalified processes
In a prequalified groove joint label, what do the first letters tell you?: The joint type: B butt, C corner, T tee, or a combination such as BC or TC.AWS D1.1/D1.1M:2025 Clause 5, prequalified joint designations
In a prequalified joint label, what do L, U and P mean?: L is limited thickness, U is unlimited thickness and P is partial joint penetration. So the label alone tells you CJP or PJP.AWS D1.1/D1.1M:2025 Clause 5, prequalified joint designations
On a prequalified joint label, what does a lowercase letter right after the detail number mean?: It marks a variant of that same numbered detail, such as a different groove shape or backing. Don't confuse it with the process letters at the end of the label; the detail's table shows which processes it covers.AWS D1.1/D1.1M:2025 Clause 5, prequalified joint designations
The parts are tacked and you have a gauge in hand. Which tolerance column of the joint detail figure do you read?: As fit-up. The as detailed column is for reviewing the drawing or WPS. The two can allow different tolerances.AWS D1.1/D1.1M:2025 Clause 5, prequalified joint detail figures
Why read the notes under a prequalified joint detail figure?: They add conditions the sketch doesn't show, such as back gouging or backing.AWS D1.1/D1.1M:2025 Clause 5, prequalified joint detail figures and notes
How do you read the prequalified minimum preheat and interpass table?: Find the steel's category, then the row for the thickest part at the point of welding, then read the minimum temperature. Check the notes.AWS D1.1/D1.1M:2025 Clause 5, prequalified minimum preheat and interpass table
Two steels with different preheat requirements are joined. Which preheat applies?: The more demanding one. The table gives a minimum, so a WPS may call for more but never less.AWS D1.1/D1.1M:2025 Clause 5, prequalified minimum preheat and interpass table