Weld beads stringer vs. weave

By Surefireinspect Date 06-24-2004 06:42

I am having a hard time finding any restrictions on the weave bead not allowed in structural joints in any code so far. I am personally a stringer bead certified welder. ABS Coast Guard and Nucular power plant. This is from years ago. I am now primarily inspection and management. I have a fellow who insists on the weave bead and I am talking WEAVE. Any one know were I can find this issue addressed
Thanks SFW

By Daon

Date 06-24-2004 06:56

Hi SFW,
To the best of my knowledge, bead width is usually addressed 2 ways. One is specific customer requirements. For example, many Natural Gas Pipeline specs will limit the bead width to 3-5 time the electrode diameter. I'm also familliar with the fossil fuel industry where 5-7 times the electrode diameter goes.
However the main restriction is in the welding Codes. When we talk bead width (for any process) we're talking heat input, which is a function of weld speed, which is addressed in most codes as an essential variable. See AWS D1.1 Table 4.5, (17).
ASME Section IX (QW409.1lists heat input as a Supplementary variable (for low-temperature applications). This is because high heat input reduces mechanical properties.
Hope this helps,
Daon

By pipewelder_1999 (****)

Date 06-24-2004 21:03

Here is a thread to look at http://aws.org/cgi-bin/mwf/topic_show.pl?id=2134#6314