I must get asked that question a dozen times each year. Most times it is from someone outside the chemical industry who has never heard it before asking me what I do. (Or who wanted to know what my license plate PLTPT stands for.) Less often but more challenging it is from a client who is struggling to decide if a code, standard, or recommended practice applies to their research equipment. You would think it would be easy to explain. Here are a few easily found definitions:
What Is A Good Definition Of A Pilot Plant?
Richard P Palluzi LLC 