• Outer surface for pipes and fittings of non-ferrous materials unless otherwise specified• All equipment and materials fabricated from aluminum, bronze, copper, plastic, or protected metal( such as rubber lined surfaces)• Inside and internals of pressure vessels, towers, tanks, heat exchangers and coolers• Name plates and identification numbers• Finished machine parts of machinery (for example, valve stems, packing units of regulator valves)• Outside face of insulation jacket unless otherwise specified• Concrete structures and foundation unless otherwise specified• Spring hanger scales and load points• Sealing face of flange