Min weld spacing again
Min weld spacing again
(OP)
I have read the many threads on in weld spacing.
4t between weld toes seems to be a well stated rule of thumb to separate the HAZs. But why should they be separated? If they over lap or get close what happens?
The t4 tee rule is offen broken. E.g reinforced tee pads. SO flange welds.
Does aone know of a paper where some had actually looked at the effect of close HAZs?
4t between weld toes seems to be a well stated rule of thumb to separate the HAZs. But why should they be separated? If they over lap or get close what happens?
The t4 tee rule is offen broken. E.g reinforced tee pads. SO flange welds.
Does aone know of a paper where some had actually looked at the effect of close HAZs?





RE: Min weld spacing again
This is a good picture relating color and temperatures from wikimedia.org,
Temperature F And Color
400 Faint Straw
440 Straw
475 Deep Straw
520 Bronze
540 Peacock
590 Full Blue
640 Light Blue
For a description of the microstructures developed with each temperature see this,
http://www.navaching.com/forge/cooling.html
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"Pumping accounts for 20% of the world's energy used by electric motors and 25-50% of the total electrical energy usage in certain industrial facilities."-DOE statistic (Note: Make that 99% for pipeline companies) http://virtualpipeline.spaces.live.com/
RE: Min weld spacing again
http://www.navaching.com/forge/heat.html
**********************
"Pumping accounts for 20% of the world's energy used by electric motors and 25-50% of the total electrical energy usage in certain industrial facilities."-DOE statistic (Note: Make that 99% for pipeline companies) http://virtualpipeline.spaces.live.com/