46 C.F.R. § 153.559
Special requirements for nitric acid (less than 70 percent)
A containment system that carries nitric acid (less than 70 percent) must be of stainless steel that resists corrosion by nitric acid.
A containment system that carries nitric acid (less than 70 percent) must be of stainless steel that resists corrosion by nitric acid.