Design Validation versus Design Verification

Codes are mandatory. It is mandated by jurisdiction or the project. You can not violate or ignore a code requirement else, you are not complying with the code. For example, if a pressure vessel is built and stamped as per

When butt welding a pipeline, achieving strenght weld is crucial, a weldment with good penetration. To ensure this, connecting the electrode to the negative pole is essential. This setup generates more heat at the base metal, reducing electrode burn rate