Unless these measures are taken, a hazardous situation can easily lead to personnel injury or material damage.
Hot works
Any work activities that will produce or may have a chance of producing sparks e.g welding, cutting, grinding, blastic e.t.c.
Welding
Welding is Union of pieces of metal by fusing the opposing surface which has been made molten by heat or occasionally by pressure.
Welding & Cutting Hazards
➜The Brillant light of an arc ( Exposure to it can result in eye injury).
➜The Heat of an arc, molten slag, sparks hot objects etc ( causing burns fire/explosion)
Toxic Fumes and Respiratory Protection
➜To ensure the protection of the person carrying out welding or cutting operation from inhalation of toxic fumes or vapors adequate exhaust ventilation must be provided.
➜Mechanical Air Purifier can be used to limit and purify the smoke generated during welding.
➜In a location where adequate exhaust ventilation is not possible, welding and cutting can be carried out safely by personnel wearing suitable respiration protection.
Dust or fume masks do not Provide adequate protection.
➜NB: Welding or cutting in enclosed spaces can deplete the oxygen content in Air.
Preparation of Work
Inspection of Work:
➜All Welding machines, leads, handpieces must be inspected before use.
➜All Welding machines (240) power outlets must be protected by a core balance earth leakage protection circuit breaker.
➜All Welding associated equipment must be inspected accordingly
➜Installation and removal of purge dams
➜Make a procedure for the installation removal of a dams
➜Obtain a Confined space permit be entering into confined space for the installation or removal of dams.
Housekeeping:
➜Housekeeping must be maintained to a high standard in all areas but especially where welding and cutting taking place.
➜All Welding studs used grinding discs etc must be contained in a receptacle located at the workplace.
➜The receptacle must be emptied daily at dumbs site.
Routing of cables:
➜All welding and electrical lead must be suspended (2m) by approved means ( Not tied with wire).
➜All cables that can not be suspended must be protected and kept out of water.
Fire Prevention:
➜ Areas must be cleared off all flammable and combustible materials
➜Use of fire retardant blank for elevated areas to capture sparks or hot metals.
➜Provide al least one fully charged 9kg Fire Extinguisher.
➜Trained the employees involved in the operation of the fire extinguisher.
Cutting
Inspection of Equipment:
➜All Gas equipment must be inspected before use on site.
➜All Gas cylinders used on the project (oxygen, acetylene or propane, etc ) must have an approved flashback arrester fitted to the gauge of the cylinders.
Inspection of Equipment:
➜Gas Troches shall be ignited by the use of a flint gun ( Cigarettes lighters, matches or hot must not be used as an ignition source )
Plasma Cutting:
➜All equipment associated with the plasma cutting must be subjected to the same safety consideration as those of welding equipment.
Gas Cylinders:
➜Gas cylinder valves should be closed and a valve protection cap in place when cylinders are no in use.
➜Gas cylinders must be away from all sources of heat.
➜Oily rags, waste should not be allowed to accumulate on or near the storage area.
➜Different gas cylinders should be store differently.
➜A gas cylinder in use should be kept far enough away from any welding and cutting operation.
Gauges & Valves:
➜Open cylinder valve slightly and close immediately before use.
➜The regulator should be used only for the gas indicated by the supplier.
➜The Oxygen regulator connection has a right-hand tread while the fuel gauge connection has a left-hand tread.
➜Avoid Oil and grease contact with the oxygen regulators.
Hoses:
➜Red hoses are for fuel gases, green for oxygen
➜Hoses must be inspected frequently for leaks, wear and lose connection.
➜Hoses must be protected from kinking.
Detailed welding procedure and site implementation monitoring will eliminate or minimize hazards.
The Welding & Cutting Safety HSE Professionals Presentation has attached in Download the main Contents of the Presentation are:
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