Which type of vessel or equipment jacketing material provides resistance to fire or caustic environments?

• A. Fiberglass
• B. Aluminum
• C. Stainless steel
• D. PVC

Answer: (C)

The main idea here is choosing a jacket material that can withstand heat and chemical exposure to protect the insulation and equipment. Stainless steel stands out because it is noncombustible and maintains strength at high temperatures, providing real fire resistance. It also offers excellent chemical resistance, including to caustic environments, so it won’t corrode or degrade when exposed to harsh chemicals.

In comparison, PVC can soften or burn and release harmful fumes when exposed to heat; aluminum can corrode in caustic solutions and may not hold up as well under intense heat; fiberglass jackets, while useful in some contexts, can be damaged by prolonged exposure to heat or chemicals and don’t offer the same level of chemical resistance as stainless steel.

So, stainless steel provides the best protection against both fire and caustic environments.