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Part B, Appendix III - As detailed vs As fitup

Part B, Appendix III - As detailed vs As fitup

(OP)
Hello all,


New guy here studying for the CWI exam. Due to the price of prep courses and the number of guys I know that have taken them and still failed, I'm studying mainly using the internet and material given to me by other CWIs.

The chart on Appendix III contains various tolerances for angle, root face, and root opening. The two columns for each are "as detailed" and "as fitup".

I'm working on practice questions about the tolerances, and so far, all the answers came from adding the tolerances in the "as fitup" column to the given range.

What is the exact difference between the two? I can't find any full explanation of what exactly "as detailed" and "as fitup" are, at least not in the spec itself and not on Google!

Also, in which situations do we use the tolerances from the "as detailed" column to add to the range?

Any help would be appreciated!

Thank you

RE: Part B, Appendix III - As detailed vs As fitup

Go to the AWS welding forum and do a search. The subject has been discussed several times.

aws.org

look for member services tab

look for forum.

You are good to go.

Best regards - Al

RE: Part B, Appendix III - As detailed vs As fitup

Good luck on the exams bud, they are no joke. There was a post about the exams labeled 'AWS CWI/CWE EXAM RESULTS' under this heading. I put a thorough list of books one should get to study before the test. Have fun, I was glad when it was done and behind me.

RE: Part B, Appendix III - As detailed vs As fitup

(OP)
You guys were correct.

I searched both forums and found it. Since I'm not sure if it's allowed, I'm not going to post the link to another forum on this forum. I'll try to summarize, though.

Basically, "as detailed" means the maximum tolerance that can be designed. "As fit up" means the maximum allowed deviation FROM the design.

Thank you guys for the reference.

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