Basic Weld Symbols Explained
Here are some reasons why you might despise welding symbols: They appear to be a drunken band of crop-circling aliens attempting to decipher the Enigma code. Here are some reasons why you should enjoy welding symbols: It may make a significant impact after you’ve channelled the Turring deep inside you to obtain some understanding of this turmoil. Even a simple grasp of welding symbols may make a huge difference in the quality of your welds. So put on your safety goggles and prepare for a crash education in fundamental welding symbols.
Welding symbols are used by the designer and the welder to communicate. They were widely sprinkled throughout most drawings for a welding project.
An arrow, a leader line (connected to the arrow), a horizontal reference line, a tail, and a weld symbol (not to be confused with welding symbol, which refers to the entire thing) make up the skeleton of a welding sign. 1 (see symbol). Don’t panic if you’ve already lost your way. Everything will start to make sense soon.
The arrow and leader line indicate the location of the joint in issue, while the weld symbol indicates the sort of weld to be performed. The weld should be made on the same side as the arrow if the weld symbol is below the reference line (as in symbol 1). The weld should be on the side opposite the arrow if the weld sign is above the reference line. If the sign shows on both sides of the joint, the weld must be completed on both sides (see symbol 2).
But what if there are two somewhat offset weld symbols (symbol 2)? This implies you’ll have to conduct a weld that’s made up of several smaller welds. The welding sign in this situation will include numbers to the left and right of the weld symbol (tricky, we know). The width (or diameter) of the weld is indicated on the left, while the length is indicated on the right. The number to the right in the example of symbol 2 above will tell you the length of the increment first (which is 2), then the pitch (distance between increment centres), which in this case is 5.
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Because the weld sign is not offset in symbol 3, the values relate to the total length of the weld. This indicates that the weld will be 20 units long from start to end, rather than being finished in parts.
In the tail of the welding sign, there may be specific instructions (see symbol 3). This usually instructs the welder to utilise a certain form of welding or to pay close attention to a specific feature. The tail is regarded optional if nothing is contained in it, and it can even be taken off altogether.
There’s a lot more to learn about welding symbols, but this quick primer should help you get started.
