Final answer:
The statement that non-load-bearing attachments to pressure-retaining items not requiring post weld heat treatment do not need a design survey submission is generally true. However, it's important to adhere to specific engineering standards and project requirements.
Step-by-step explanation:
The addition of non-load-bearing attachments to pressure-retaining items when post weld heat treatment is not required does not necessarily have to be submitted for a design survey. This is because these types of attachments do not affect the pressure integrity or the structural capacity of the item. However, this could vary depending on the specific codes and standards applicable to the project or the jurisdiction it is in. It is also important to consult with the relevant engineering guidelines and design requirements before making any such modifications, even if they seem minor or inconsequential.