Hot Work Safety Training (1122)

 

HOT WORK TR INING

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Why is ‘Safe Hot Work’ important ? •

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An estimated 562,000 employees are at risk for exposure e xposure to chemical and physical hazards of welding, cutting and brazing

For the construction industry, welders flash (burn to the eyes) accounts for 5.6% of all construction eye injuries

For the construction industry, welders flash (burn to the eyes) accounts for 5.6% of all construction eye injuries

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What is the Hot Work ?

Hot Work comprises work activities that involve the application or generation of heat during their execution. Examples : - Cu Cutt ttin ing g - Wel eldi ding ng - Br Braz azin ing g - So Sold lder erin ing g - Use of of blow-la blow-lamp mpss Hot Work, in the main, is associated with the application of heat either directly to, or adjacent to plant, tanks, vessels, pipes etc, that contain or have contained any explosive, flammable or toxic substance. However, for completeness, due to the fire risks intrinsic to any Hot Work Activity, and the risk of personal injuries due to hot debris, toxic fumes etc., 3

 

Risk Point The hazard arising from Hot Work The main hazards likely to be encountered during welding and cutting processes are: ● ● ● ● ● ●

High temperature, temperature, causing burns and fires; Directly or indirectly evolved evolved fumes, liable to cause injur y to health; Thermal radiation causing burns and 'arc eye'; eye'; Oxygen insufficiency or enrichment within confined spaces; Electric shock, which may also lead to a fall; Explosions (often fatal) during the welding of tanks, drums, and vessels which have not been fully freed of flammable contents and inert gas purged.

Ignition source rate

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Basic procedure

General Safety Precautions • Equipment shall be visually inspected by the user daily. daily. • Remove and replace defective equipment. • All welding and brazing operations shall have proper ventilation. • • • • • •

All unsecured work pieces shall be properly clamped. Turned off all equipment when not in use. A portable fire extinguisher shall be available within 3 m (10 ft). Remove & protect combustibles around the work area All sewers within 23 m (75 ft) shall be covered prior to work. A qualified fire watch shall be maintained during operations and for 30 minutes afterwards. • Cutting, welding, and brazing are not allowed in O2 enriched environments (i.e., O2 concentration greater than 23.5%). • Wearing the proper PPE

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PPE

Protective clothing required for welding and burning varies with the size, nature and location of the work to be performed: • Only fire resistant clothing must be worn. • All welders shall use flameproof gloves. • Clothes should be free from oil and grease. • Flameproof leather (or suitable material) aprons should be considered if long term exposure to radiant heat or spark is anticipated.

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Hot Work Permit

Hot Work Permit System • A hot work permit system is devised and used whenever welding, cutting and bracing is to be done • Hot work permit is bring prepared by the supervisor and or the leadman involved in hot work activities. (enclosed/attached to the Daily Safety Work Plan)

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Fire Prevention

* Clear the area of all combustible material such as; paper, card board, rags, grease, liquid fuels, oil etc. • Fuel container must be of metal and equipped with an air-vent. air-vent. • Fuel trucks will be properly grounded when refueling equipment. • Equipment must be switched off during refueling.

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Fire Safety Precautions

• Make sure there is a fire extinguisher within 6 meters. • A 10 kg.(20 Pound) Pound) or larger dry dr y chemical Fire Extinguisher. Extinguisher. • Cover immovable combustible materials with a Fire Blanket. Blanket. • Observe all of the safety precaution listed on the Hot Work Permit. Permit. • Appoint a Fire Watch person.

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Welding Operation

Electric Arc Welding Operations • Electric welding machines shall be properly bonded and grounded • Electric welding machine electrical outlets shall be the 110 volt (V), 3-pronged type with ground fault protection device; 220 V electrical outlets are not permitted. • Welding cables shall be continuous within 3 m (10 ft) of the electrode holder. holder. • temporary All damaged welding removed from service; repairs andcables taped shall jointsbeare prohibited. • Proper welding screens shall be used near other personnel.

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Welding Operation

Gas Welding, Cutting, and Brazing Operations • Lighted torches shall not be left unattended. • Compressed type fittings shall be utilized on hose connections. • All connections/equipment shall be checked for leaks before use (e.g., soap solution). • Gas regulators shall be turned off and hoses bled off at the end of shift or task. task . • Hoses shall be protected from potential damage during operations. • Flashback arrestors shall be placed at O2/acetylene cylinder regulators as shown below in Figure 6. Figure 6. Flashback Arrestor Position on O2/Acetylene Cylinders * Compressed Cylinder • Only strikers shall be used to light a torch; never light a torch with matches or a lighter. • When opening an O2 or fuel cylinder valve, always crack it open first. • Stand to the side of a regulator, not in front of it when opening cylinder valves. • Acetylene cylinders in use shall have a handle or valve wrench in place at all times. 11

 

Cylinders Handling --Oxygen --Oxyg en and Acetylene cylinders mus --Flame arrestors on compressed gas t be stored separately

cylinders are required for all areas insi de the LUBEREF facility.

--When not in use, the protective valv e cap must be kept in place

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Hot Work in Confined Spaces

• Ensure a CSE permit has been issued. • Remove all flammable materials. • Check if there is adequate ventilation. • Check if there is adequate lighting. • Identify what personal protective equipment must be worn. • Position the welding power source outside the confined space. • Cover or arrange welding cables to prevent contact with falling sparks. • Station a person outside, to observe the work and a nd raise the alarm in an emergency emergency..

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Fire Watch

Fire Watch will be required when Hot Work is to be performed; ; in all locations where fire mat develop ; where combustible material stored within 10m (3.5ft.) of Hot Work ; if combustibles are greater than 10m (3.5ft.) away but are easily ignited Duties and Responsibility • A Fire Watch will be familiar with methods to sound an alarm. • Remain on duty for at least 30 minutes after welding operation have stopped. stopped. • He has the authority to stop work when; Sparks are not contained When a fire starts When conditions of the permit are not being met

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Barricading System

• Physical barricading system is implemented • Whenever there is Hot Work activities in the area • Display appropriate signage in the area

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