Summary of Welding Requirements

junvy

General Requirements

• Only qualified welders are to be authorized to do any welding, heating, or cutting.
• Inspect your work area for fire hazards and proper ventilation before welding or cutting.
• Avoid welding or cutting sparks, and hot slag. Be alert to hot surfaces, and avoid touching metal surface until they have cooled.
• Place compressed gas cylinders in an upright position, and secure them in place to prevent dropping or falling. Handle them with extreme care, and do not store them near any sources of heat.
• Remove any combustibles when welding or cutting must be done. If removal is not feasible, cover combustibles with a non-combustible material. When welding near any combustible material, another employee must be posted to serve as a fire watch. Make sure this person has a fire extinguisher available, and keep him/her in the area after welding/cutting is completed, and until all danger of fire is past.
• When working in the vicinity of welding operations, wear approved goggles and avoid liking directly at the flash, as serious flash burns could result.
• When opening valves on tanks that have regulators installed, be sure the pressure adjustment screw is all the way out, and do not stand in front of the regulator. An internal failure could rupture the regulator and cause the adjustment screw to become a missile.

Gas Welding and Cutting

• When transporting, moving, and storing compressed gas cylinders, always ensure that the valve protection cap is in place and secured.
• Secure cylinders on a cradle, slingboard, or pallet when hoisting. Never hoist or transport by means of magnet or choker slings.
• Move cylinders by tilting and tolling them on their bottom edges. Do not allow cylinders to be dropped, struck, or come into contact with other cylinders, violently.
• Secure cylinders in an upright (vertical) position, when transporting by powered vehicles.
• Do not hoist cylinders by lifting on the valve protection caps.
• Do not use bars under valves, or valve protection caps, to pry cylinders loose when frozen. Use warm, not boiling, water to thaw cylinders loose.
• Remove regulators and secure valve protection caps prior to moving cylinders, unless cylinders are firmly secured on a special carrier intended for transport.
• Close the cylinder valve when work is finished, when cylinders are empty, or when cylinders are moved at any time.
• Secure compressed gas cylinders in an upright position (vertical), except when cylinders are actually being hoisted or carried.

Arc Welding and Cutting

• Use only manual electrode holders which are specifically designed for arc welding and cutting.
• All current-carrying parts, passing through the portion of the holder, must be fully insulated against the maximum voltage encountered to ground.
• All arc welding and cutting cables must be completely insulated, flexible type, and capable of handling the maximum current requirements of the work in progress.
• Report any defective equipment to your supervisor, immediately, and refrain from using such equipment.
• Shield all arc welding and cutting operations, whenever feasible, by non-combustible or flameproof screens, to protect employees and other persons working in the vicinity from the direct rays of the arc.

Fire Prevention

• Locate the nearest fire extinguisher in your work area in case of future need for an emergency. Fire extinguishing equipment must be immediately available in the work area.
• Never use matches or cigarette lighters. Use only friction lighters to light torches.
• Never strike an arc on gas cylinders.
• Move objects to be welded, cut, or heated to a designated safe location. If the objects cannot readily moved, then all movable fire hazards, in the vicinity, must be taken to a safe place, or otherwise protected.
• Do not weld, cut, or heat where the application of flammable paints, or the presence of other flammable compounds, or heavy dust concentrations creates a hazard.
• Additional employees must be assigned to guard against fire, while the actual welding, cutting, or heating is being performed, when the operation is such that normal fire prevention precautions are not sufficient.
• Prior to applying heat to a drum, container, or hollow structure, provide a vent or opening to release any built-up pressure during the application of heat.
• Never cut, weld, or heat on drums, or containers that have contained flammable liquids, until they have been cleaned

安无忧

it seems good.

xiaoke127

charlie.zhong

thnks