Symbols and conventions used in welding documentation

• Welding is process of joining similar or dissimilar metals by the application of heat and sometimes pressure.

Welding process has become popular in recent decades for joining of metal parts with each other. Many techniques and methods have been available for general as well as specific purposes.

For simplicity,it is necessary to have Symbolic Representation and conventions.

Welding

1. Square butt joint
2. Single V preparation joint
3. Lap joint
4. T-joint.

Welding

Types of symbols

Various categories of welded joint are represented by symbols which are similar to the shape of welds to be made. These symbols are categorised as:

• Elementary symbols
• Supplementary symbols
• Combination of elementary and supplementary symbols
• Combination of elementary symbols

Elementary Welding Symbols

The elementary symbols are as follows:

Location of welds

The location of welds is specified by the following:

1. Position of the arrow line
2. position of the reference line
3. position of the symbol