MODULE 14- SPECIAL WORKSAFE COMPANY

WELDING - Technique used to bond materials to each other. uses heat. Special

safety measures.

- Risks:

Electrocution (Insulation, insulated gloves and a power supply with lower safety voltage)

Fire and explosion. Removing flammable material and, if necessary, cover the ground with fire-resistant material. Welding apron),

UV radiation (Welding mask, welding curtains appropriate, close-fitting work clothing)

Poisoning by welding smoke (good ventilation, extraction, if necessary: filtering mask or a breathing hood).

WELDING II- Autogenous welding: the heat is generated by a mix of flammable

gas (acetylene or propane) and oxygen.

- Areas clear and clean, screens and work permits.

- No flammable materials near the welding site. Fire extinguisher.

- Avoid welding in wet areas.

- Maintenance operations: switch-off.

- Special attention: welding at height and welding in confined spaces.

WELDING III• To avoid gas release : hose break protection (cuts off the feed

immediately).

• To avoid flash-back: flame damper (blocks backfire of the flame to the bottle).

• Welding glasses protect the eyes against radiation and against small glowing metal parts.

• Gloves, protective clothing, goggles, safety boots, noise protection, respiratory protection.

• To avoid welding fumes, the working area must be ventilated.

EXPLOSION-PRONE ENVIRONMENT

- Flammable liquids, gases, fumes or dust clouds are present.

- Clearly marked: warning sign.

- Explosion hazard zones: classified depending on the frequency and duration of the potentially explosive atmosphere. 2 main systems : EU and USA

- Written authorization. Use of an explosion meter. Supervision of the area.

- Equipment used: suitable for use in the explosion hazard zone.

EXCAVATIONS• Risks: flooding or collapsing, suffocation and intoxication

• Identifying power cable and other services run (plan of mains) and keep at least 0.5 metres from any power cable.

• Toothless bucket if you work with an excavator

• No unsupported excavations. Plant, equipment and people: safe distance (barriers). No gas cylinders in the excavation.

• Always at least two ladders to offer sufficient opportunity to escape. A deep excavation: confined space.

DEMOLITION WORKS

• Risks: working at height (danger of fall), unstable construction, falling demolition material, danger of collapse, release of dangerous substances like asbestos and quartz dust and noise.

• Work demolition plan. Securing openings, edge protection , safety nets and personal fall protection. Waste chute.

• PPE

• Inventory of the concentration of dangerous substances (asbestos).