is D1.4 covered under section IX?

By jon20013 (*****)

Date 01-17-2007 16:11

D1.4 and ASME IX are separate standards. Why would D1.4 be covered by ASME IX? If you're asking about the materials, that may be a whole new answer... not quite sure exactly what your asking? The question is posed kind of like are K-mart products listed in the Sears cataloge...

By masterfab55 Date 01-17-2007 16:18

Thanks. I understood ASME section IX covers pipe and structural, I wasn't sure if it covered reinforcing bar welding also.

By jon20013 (*****)

Date 01-17-2007 16:50

I don't see A615 listed in QW-422, so the only way you could make it qualify would be to qualify a welding procedure spec., and list the A615 as an unlisted material; which should include the chemistry of the A615.

EDIT: Logically thinking, there's not a lot of applications where rebar would be used in a boiler and pressure vessel applications, likely why the material is unlisted.

By masterfab55 Date 01-17-2007 18:37

Thanks. This is a great forum! Let me ask on last question, would a 6-G certification allow for welding rebar under the AWS D1.1 Sec. V portion of the certification? I know I'm twisting your brain and obviously I don't know squat about ASME or AWS, but I'm trying to save my butt and keep this job moving. I'm also certified with SMAW; ANSI/AWS D1.1 Sec. 5 Part C....does welding either A706 or A615 rebar fall in there anywhere. You mentioned you didn't see A615 listed in QW-422, is A706 listed? Thanks for the help.

By jon20013 (*****)

Date 01-17-2007 19:26

A706 isn't listed either. I usually qualify my welders to both ASME IX and AWS D1.1 simulatenously. It's my opinion that a 6G would qualify under D1.1 Section V for the welder but the question will come with regard to the procedure (WPS). I don't think rebar is a perqualified material under D1.1 and is so would require procedure quals. :(

By masterfab55 Date 01-17-2007 23:55

Just tell me where to send the check!....... I have another question. I just received a statement from the engineers. They state that AWS D1.4 permits the use of A615 bars if preheat of 300 or more degrees was used. I did do that! They go on to say: if preheat was used and "all other applicable requirements in AWS D1.4 were used, we accept welding A615 to top of steel beam". I have been online looking at AWS D1.4 and it just states I can use either SMAW, GSAW or FCAW. I can't find where it states specifically to us a 90 series rod. Would it be your definition that a 7018 is okay to use with this preheat procedure? I'm looking in my Lincoln procedure book and it states to use 70XX rod. Thanks again........

By hogan

Date 01-18-2007 15:00

if it was a fillet weld like in a t connection, then it is prequalified in d1.4. i don't have the code in front of me. i'm sure someonelse can be more specific.

By jon20013 (*****)

Date 01-18-2007 17:50

Very cool masterfab55! Glad to hear it! Once in a while you luck out and get a good engineer! <jk> 7018 sounds like ot would work although if I were researching it I might like to look for something with a bit higher carbon content... I'm sure others will offer better advice on this issue.

By henri

Date 01-25-2007 04:58

For welding parameters, we have to look at D1.1-Steel and D1.4 for rebar.

Use filler metal for lower strength group. D1.4 Table 5.1 indicates 90 ksi tensile strength low hyrdogen filler metalt...compare that to D1.1 Table 3.1 and use lower value (ref D1.1 Sec 3.3 and D1.4 Sec 5.1.2).

The preheat for rebar is based on CE and bar size....see D1.4 Table 5.2. If chemistry of rebar is unknown, see 1.3.4.3 items 1 and 2. Compare this with D1.1 Table 3.2 preheat for lintel and use higher value (ref D1.4 Table 5.2 footnote 1).

D1.4 Sec 4 Sec 6 deals with procedure and welder qualification testing. With the exception of fillet welds, WPS's need to be qualified by testing. As for welder qualification, my intepretation is that even if you are qualified for the 6GR position per D1.1, you'll still have to qualify under D1.4 if you want to weld rebar to structural steel.