hey guys as some may know im building a trailer in my other thread im using a mix of galvanized and painted steel, i have read about grinding off the galvanizing which i plan on doing i will also be welding outdoors but the thing is i have been searching and searching the internet and so many people are saying the fumes are really bad for your health now i just found this web site
http://ift.tt/1DJMvEP
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"Arc and oxyacetylene welding
In the arc welding or oxyacetylene welding of galvanized steel, provision must be made for control of welding fumes when planning procedures. Due to the relatively low melting point of zinc a proportion of the coating is volatilised and given off as a white zinc oxide fume. The presence of any fume evolved is obvious and this permits simple observation of the efficiency of the ventilation or extraction system. When welding is carried out in accordance with normal industrial practice with provision for adequate ventilation and air circulation, the non-toxic zinc fumes will cause no inconvenience. If adequate ventilation is not available, supplementary ventilation using air extraction equipment or forced air circulating equipment, should be provided. Although welding fumes from galvanized steel are not toxic, operators welding in a confined space should always be provided with suitable respirators to minimize possible discomfort. Fume development and consequent coating damage may often be minimized with certain joint designs in flat sheet by the use of copper chill bars. The chill bars are used as a backing strip or clamped on the weld side of the joint to absorb some of the heat generated during welding."
is this correct? so i wont harm myself welding this stuff? i have never tried welding gal steel so i dont know how much smoke is produced but ill need to be close while TIG welding it and i cant fit my respirator under the helmet, any ideas on which respirator i can use?
http://ift.tt/1DJMvEP
scroll down to this bit
"Arc and oxyacetylene welding
In the arc welding or oxyacetylene welding of galvanized steel, provision must be made for control of welding fumes when planning procedures. Due to the relatively low melting point of zinc a proportion of the coating is volatilised and given off as a white zinc oxide fume. The presence of any fume evolved is obvious and this permits simple observation of the efficiency of the ventilation or extraction system. When welding is carried out in accordance with normal industrial practice with provision for adequate ventilation and air circulation, the non-toxic zinc fumes will cause no inconvenience. If adequate ventilation is not available, supplementary ventilation using air extraction equipment or forced air circulating equipment, should be provided. Although welding fumes from galvanized steel are not toxic, operators welding in a confined space should always be provided with suitable respirators to minimize possible discomfort. Fume development and consequent coating damage may often be minimized with certain joint designs in flat sheet by the use of copper chill bars. The chill bars are used as a backing strip or clamped on the weld side of the joint to absorb some of the heat generated during welding."
is this correct? so i wont harm myself welding this stuff? i have never tried welding gal steel so i dont know how much smoke is produced but ill need to be close while TIG welding it and i cant fit my respirator under the helmet, any ideas on which respirator i can use?
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