Galvanized pipe for wet chemical systems is permitted if specifically listed.

Galvanized pipe for wet chemical systems is permitted if specifically listed.

• A. It is never permitted.
• B. It is always permitted.
• C. It depends on the system.
• D. True

Answer: (D)

The main idea is that material approval for wet chemical systems comes from explicit listing. For galvanized pipe to be used in this context, there must be a recognized listing that specifically covers galvanized piping for that exact wet chemical service. The listing shows that the pipe has been evaluated for compatibility with the chemical, its concentration, and the system’s temperature and pressure, confirming it won’t corrode or fail in that environment. Without such a listing, galvanized pipe isn’t permitted because the zinc coating or the steel could react with the chemical and lead to leaks or contamination. So, the statement is true: galvanized pipe may be permitted in a wet chemical system only if there is an explicit listing approving it for that service.

The main idea is that material approval for wet chemical systems comes from explicit listing. For galvanized pipe to be used in this context, there must be a recognized listing that specifically covers galvanized piping for that exact wet chemical service. The listing shows that the pipe has been evaluated for compatibility with the chemical, its concentration, and the system’s temperature and pressure, confirming it won’t corrode or fail in that environment. Without such a listing, galvanized pipe isn’t permitted because the zinc coating or the steel could react with the chemical and lead to leaks or contamination. So, the statement is true: galvanized pipe may be permitted in a wet chemical system only if there is an explicit listing approving it for that service.