This post is a little stale, but I will add that hexavalent chrome is the concern when welding and grinding materials containing chrome. Part of the inspection work I do at the refinery is ongoing inspection during weld overlay work inside of vessels. The overlay material generally has a high chrome content. We go over a lot of safety information prior to these jobs, welders who are working continuously in this environment are required to be in enclosed helmets with breathing air supplied from outside the vessel. Personnel such as myself who are in the area periodically can do so with a proper respirator. However, while arc gouging chrome material is in process inside a vessel generally only the welders with the sealed helmets are allowed inside. I’ll attach an OSHA link on hex-chrome.
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Today's Featured Article - New Hitches For Your Old Tractor - by Chris Pratt. For this article, we are going to make the irrational and unlikely assumption that you purchased an older tractor that is in tip top shape and needs no immediate repairs other than an oil change and a good bath. To the newcomer planning to restore the machine, this means you have everything you need for the moment (something to sit in the shop and just look at for awhile while you read the books). To the newcomer that wants to get out and use the machine for field work, you may have already hit a major roadblock. That is the dreaded "proprietary hitch". With the exception of the
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