AWS F3.2M-F3.2 pdf free download

AWS F3.2M-F3.2 pdf free download.Ventilation Guide for Weld Fume.
Beryllium (Be) is found in light metal alloys and some copper alloys. Inhalation of excessive levels of beryllium can results in acute pneumonitis (inflammation of the lung tissue). Chronic inhalation above permissible exposure limits can produce beryllosis (progressive lung disease) and systemic beryllium disease.
*Cadmjum (Cd) occurs as a plating material or brazing alloy. It can be a serious hazard resulting in emphysema, kidney damage, and pulmonary edema.
Carbon Monoxide (CO) in low concentrations results from the reaction of carbon dioxide and the welding arc in gas metal and flux cored arc welding. Symptoms include headaches, dizziness, and mental confusion.
*Chromium (Cr) is an alloying element most commonly found in stainless steels, and some nickel base alloys, hardfacing alloys, and low-alloy steels. It can cause skin Irritation and increased risk of lung cancer.
Copper (Cu) is used in some electrodes and in alloys. It may also be found as a coating material on some bare steel electrodes or rods. Copper can cause respiratory irritation or metal fume fever.
Fluorine (F) in the form of fluorides is used in some fluxes and electrode coatings and as a fill ingredient in some flux cored electrodes. It can cause respiratory and eye irritation.
Iron (Fe) in the form of iron oxide is the most common fume constituent when welding steels. Iron oxide can be a respiratory irritant and can cause siderosis.
Lead (Pb) is found in some coatings and in some brass, bronze and steel alloys and solder alloys. Lead can cause nervous system disorders, kidney damage, and reproductive problems.
1’1agncsium (Mg) is found in light metal alloys and certain exothermic materials used in welding. It can he a respiratory irritant.
1’1anganese (Mn) is used in most steel alloys and may be found at higher levels in some hardfacing electrodes. It can produce nervous system disorders, pneumonia, and loss of muscle control.
Mercury (Hg) may he found as a residue in the form of salts. It is used as a pickling agent for metals that are manufactured with zinc alloy coatings. The principal target organs for mercury are the liver, brain, and central nervous system.
Molybdenum (Mo) is found in some steel alloys and can cause respiratory and eye irritation in high concentrations.
*NickeI (Ni) is present in some stainless steels, low-alloy steels, and nickel alloys. It can cause respiratory and skin irritation and metal fume fever. Nickel can cause increased risk to lung and nasal cancers.
Nitrogen Oxides (N0) consisting of nitric oxide and nitrogen dioxide are formed by the welding arc and are respiratory irritants. High exposures can lead to pulmonary edema.
Ozone (03) is formed by the interaction of the welding arc and atmospheric oxygen. Ozone can irritate the eyes, nose, and throat, and in high concentrations can cause pulmonary edema.
I’hosgene is a highly toxic gas which is formed when the ultraviolet rays from the welding arc come in contact with chlorinated solvents, such as trichioroethylene. Inhalation of high concentrations of phosgene may produce pulmonary edema.AWS F3.2M-F3.2 pdf download.