GENERAL WELDING AND CUTTING GUIDELINES（一般焊接与切割的指导方针）.pdf

. GENERAL WELDING AND CUTTING GUIDELINES Only authorized employees who have been properly trained shall be permitted to perform welding or cutting. Employees performing cutting or welding must wear the personal protective equipment required for the job. Clothing shall be free of excessive grease and oil. Fire extinguishers shall be readily available wherever cutting or welding is being done. EQUIPMENT Cylinders Oily or greasy substances shall be kept away from cylinders, cylinder valves, couplings, regulators, hose and other equipment. Any equipment that has been subject to oil and grease shall be thoroughly cleaned before being placed back into service Fittings shall never be lubricated. Only approved materials shall be used on oxygen equipment. Contents of cylinders shall be identified by commonly accepted names legibly marked on the cylinder. Do not rely on color codes because there are no standard codes for cylinders. Report any unlabeled cylinder to your foreman. All cylinders shall be provided with approved pressure relief devices. No repairs of any kind are to be attempted on any cylinder. Safety devices on cylinders or apparatus shall not be tampered with or removed Oxygen cylinders shall not be stored in the same compartment with cylinders of acetylene or other fuel gas. Unless well separated (minimum of twenty (20) feet), there shall be a fire resistant partition between oxygen cylinders and acetylene or fuel gas cylinders. Cylinders shall always be stored in an upright position. Provisions should be made to prevent their falling over or being struck by other objects. Cylinders shall not be stored in locations where they might be exposed to excessive heat. All empty cylinders shall be marked (MT) and returned to their proper storage compartments with valves tightly closed and caps replaced. During transportation, cylinders shall be secured in an upright position. When an oxygen and acet