What is the term for the opening between two metal pieces being joined by a groove weld?

The term for the opening between two metal pieces being joined by a groove weld is "groove." This term specifically refers to the configuration of the joint where the two pieces of metal are prepared to fit together, allowing for the weld to be made at the bottom of this joint. Groove welds are commonly used when joining thicker materials, and the shape of the groove can vary depending on the type of joint and the welding process being used.

Understanding the correct terminology is crucial in welding print reading as it helps to accurately interpret specifications and welding symbols indicated on technical drawings. The groove is essential as it determines the amount of weld metal needed and influences the strength and appearance of the finished weld.