Why is the tail used on the welding symbol?

The tail on a welding symbol serves several important functions, making it a critical element for conveying additional information to the welder.

First, it can be used to refer the welder to the proper code. This is important because different welds may require adherence to specific industry standards or codes for quality and safety. By including this reference in the tail, it ensures that the welder is aware of and follows these requirements.

Second, the tail can indicate the specific welding process to use. Different welding methods—such as MIG, TIG, or stick welding—may be required depending on the materials being joined and the job specifications. This clarity helps eliminate confusion and ensures the correct technique is employed for the task at hand.

Lastly, the tail also often includes additional notes or instructions pertinent to the specific welding operation. This may encompass things like pre-weld treatment or post-weld inspections, which are vital for achieving the desired joint strength and integrity.

Considering these functions, it's clear that the tail plays a multifaceted role, ranging from code references to process indications, as well as directing the welder to further instructions, all of which contribute to the effectiveness and safety of the welding operation.