Specification for steel bar welding (GB500 17-20 17)

Specification for steel bar welding (GB500 17-20 17)

introduce

Reinforcement welding is an important process in reinforcement processing, which is widely used in buildings, bridges, tunnels, water conservancy and other fields. In order to ensure the welding quality of reinforcement and improve the safety and reliability of the project, the state has formulated the Code for Welding of Reinforcement (GB500 17-20 17).

operation sequence/order

Preparatory work/about to start work

Before rebar welding, the following preparations should be made:

1. Remove the oil stain and oxide on the steel bar surface to ensure the welding surface is clean.

2. For corroded steel bars, derusting treatment is required.

3. Check the status of welding equipment and tools to ensure their normal operation.

welding operation

1. Align the steel bars and fix them with clamps.

2. Choose the appropriate welding current and voltage according to the welding requirements.

3. Insert the covered electrode into the arc welding machine and adjust the electrode spacing and arc length.

4. Start welding, and maintain a stable welding speed and arc length during the welding process to avoid overheating or supercooling.

5. After the welding is completed, the appearance and size of the weld shall be inspected to ensure that it meets the requirements.

Welding quality control

In order to ensure the welding quality, the following controls are required:

1. The selection of welding materials should meet the design requirements, and the welding materials should have good weldability and mechanical properties.

2. In the welding process, attention should be paid to protect the weld to avoid oxidation and pollution.

3. Welding parameters should be strictly controlled during welding to avoid welding cracks, blowholes, slag inclusion and other defects.