Plumber (Basic Knowledge of Safe Operation for Construction Workers)

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II. Basic Safety Operation Knowledge
1. All machinery and equipment used for installing plumbing pipes or equipment must have dedicated final-level switch boxes, and the distance between the switch box and the machinery shall not exceed 3 meters. It is mandatory to implement the "one machine, one switch, one leakage protector, one box" system.
2. The plugs of tools shall not be arbitrarily removed or altered. When the original plug is damaged, it should be replaced with an identical model promptly.
3. When plumbing workers perform on-site prefabrication and installation, the work area should be dry and level. When multiple tools are used simultaneously, there must be ample operating space.
4. The rigging used for hoisting air ducts must be secure. During hoisting, the hoisting ropes should be tied firmly to the air ducts and kept at a safe distance from electrical wires.
5. When hoisting pipes, the load capacity of the chain hoist should match the weight being lifted, and the chain hoist must be in good condition. No one should stand under the hoisted item. The pipes must be secured firmly before releasing the chain hoist.
6. When striking pipes with machinery, no one should stand under the pipes. When striking pipes manually, personnel should keep clear. When heating pipes, no one should stand in front of the pipe openings.
7. Vertical pipes should be installed from bottom to top and secured promptly after installation to prevent accidents.
8. When moving or aligning pipes, actions should be coordinated, and hands should not be placed near the pipe openings or flange joints.
9. When turning over workpieces, sliding and tilting should be prevented to avoid accidents.
10. When bending pipes with a manual pipe bender, a flat area should be chosen, and work should not be performed on uneven or high-slope surfaces. During operation, the face should be kept clear to prevent accidents.
11. Linkage or ropes should be used between folding ladders. On smooth surfaces, ladder feet should be equipped with insulating covers or rubber pads. On muddy ground, ladder feet should be fitted with metal tips for stability. The ideal angle for the upper section of a folding ladder is between 35° and 45°.
12. When climbing ladders, face the ladder and do not hold any objects.
13. When installing pipes, a completed structure or an operating platform must be used as a foothold. It is strictly prohibited to stand or walk on pipes during installation.
14. When assembling air ducts, the flange holes should be aligned precisely with a pointed tool; do not touch them with fingers.
15. When riveting flanges or punching holes for straps inside air ducts, personnel outside the duct should avoid the riveting and punching positions.
16. When threading wires, do not call out or blow air near the pipe openings to prevent wire tension from hooking eyes. Coordination is required when threading wires to prevent hand injuries.
17. No one should approach the underside of the floor or behind the wall when drilling through brick walls.
18. Wear safety goggles when cutting grooves or holes. The hammer head must be secure, and light, slow strikes should be used when the hole is nearly completed.
19. When performing electric or gas welding, protective equipment must be worn as required (e.g., safety helmet, insulated shoes, insulated gloves).
20. Use sawing machines, steel saw stands, pipe cutters, or abrasive pipe cutting machines to cut pipes. Ensure they are leveled and secured; do not use excessive force when nearing the cut, and use hands or supports to steady the pipes.
21. When using a folding machine for bending, operators should coordinate with each other and maintain a safe distance from the machine to avoid being struck by the flipping steel plates or counterweights.