Impact test thickness limitations

Date 04-28-2011 04:06

Where in the code books would i be able to find Impact test thickness limitations ranges.
I have completed a welding procedure on 6 in sch 80 (A-333) pipe which requires impact testing.
So is there a difference on thickness ranges on a standard wps as compared to one welded for impact test.
If so, where would i find it in the code books?
tks

By Shane Feder (****)

Date 04-28-2011 08:59

Welder5354,
It is actually quite involved.
No impacts - one qualified thickness range
Impacts to ASME IX - a different qualified thickness range
Impacts to B31.3 - a totally different set of thickness ranges.

A good explanation to my similar question was given by jon20013, 803056 and js55 (I think) in a previous post.
Use the search engine above and type Impact Test in Subject and Shane Feder in the Poster.
Regards,
Shane

By js55

Date 04-28-2011 12:17

What Code?

By js55

Date 04-29-2011 11:54

I'm guessing that becasue you are using A-333 pipe it is B31.3 you are dealing with.
B31.3 can be tough to negotiate the first time and almost everyone gets it wrong.

By welder5354 (**)

Date 04-30-2011 04:24

Yes Js55....I have read where it discusses about limitations for impacts.
But it does not give you a direct answer. Either in ASME IX or B31.3.
For standard test, it's no problem.

By jon20013 (*****)

Date 04-30-2011 12:10

Its in Table 323.3.1 and same for High Pressure (K323.3.1) also, as follows: 1/2t to t + 6mm (1/4 inch). "t" being the thickness of the PQR material.

ASME IX ALWAYS defers to the constructing code and it does here also, as follows: QW-171.1 General. Charpy V-notch impact tests shall
be made when required by other Sections. Test procedures and apparatus shall conform to the requirements of SA-370.

QW-171.2 Acceptance. The acceptance criteria shall be in accordance with that Section specifying impact requirements.