The purpose of this standard are to provide a nationally recognized standard for the guidance of manufacturers, distributors, and purchasers of porcelain enameled formed steel plumbing fixtures, to promote better understanding between suppliers and users regarding significant features of the fixtures, to provide a basis for fair competition in furnishing fixtures that meet the principal demands of the trade, and to encourage development and design of innovations and improvement of durability of the fixture. This standard covers materials, methods of inspection, dimension, testing,and identification of porcelain enameled formed steel plumbing fixtures, such as bathtubs, sinks, and lavatories, which are in general use and demand.