During a retrofit of an existing process, a vessel used to supply the feed pump to a batch reactor has been replaced because of excessive corrosion. The vessel is essentially identical to the original one, except it is now grounded differently to reduce the corrosion. If the function of the vessel (namely, to supply liquid to a pump) has not changed, answer the following questions:

• Should the new vessel have a new equipment number, or should the old vessel number be used again? Explain your answer.
• On which diagram or diagrams (BFD, PFD, or P&ID) should the change in the grounding setup be noted?