What is a Welding Procedure Data Sheet (WPDS)?

• A. A document detailing welding parameters and ranges for joints, over a range of thicknesses and weld sizes
• B. A register of welders
• C. A safety manual
• D. A schematic drawing

Answer: (A)

The main idea being tested is that a Welding Procedure Data Sheet records the specific welding parameters and their valid ranges for joints across different thicknesses and weld sizes so welding can be done consistently and traceably. A WPDS isn’t about who the welders are, nor is it a safety manual or a drawing. It serves as the data backbone that shows what settings are approved to achieve the same weld quality when joint thickness or weld size varies, covering details like the process, filler metal, base metal, joint configuration, and the acceptable parameter ranges (preheat, interpass temperature, heat input, etc.). This is why it’s the best description: it precisely defines the variables and their allowable ranges needed to apply a welding procedure across a family of joints and thicknesses, ensuring repeatability and compliance.