MATERIALS, DESIGN AND CONSTRUCTION: GROUP C
§ 37.111. Materials.
(a) —
(1) Surfaces within the food product zone shall be smooth, free from pits, crevices and loose scale, and shall be relatively nonabsorbent. Furthermore, surfaces shall be nontoxic and unaffected by food products and cleaning compounds.
(2) Sponge rubber, stone slab, linoleum, flannel and unglazed ceramic material are basically objectionable and shall not be used.
(3) Wood and cloth, if used, shall be indicated under specific application.
(b) The finish of corrosion-resistant surfaces such as stainless steel or nickel alloy shall be of 125 grit, and properly applied.
(c) Finishes of cast iron, cast and forged steel, and cast nickel alloy shall not exceed a surface roughness of American Standard #125 or its equivalent.
(d) The use of galvanized surfaces shall be minimal and where used shall be of the smoothness of high quality commercial hot dip.
(e) Copper and its alloys shall not be used in equipment where edible oils, liquid shortening, chocolate liquor and other fatty food products come in contact with the metal.
(f) Cadmium shall not be used in any manner or form on the food equipment.
(g) Lead shall not be used within or adjacent to the food product zone, with the exception of its inclusion in dairy solder, in an amount not to exceed 5.0%.
(h) Plastics shall be in conformity with regulations for the Federal Food, Drug, and Cosmetic Act (21 U.S.C.A. § 301 et seq.) as published in the Code of Federal Regulations. (See 21 CFR 1.1 et seq.)
(i) Gasketing and packing materials shall be relatively non-porous, relatively non-absorbent, and installed in a manner that results in a true fit to prevent protruding into the product zone of the creation of recesses or ledges between the gasketed joints.
(j) Coatings used in the food product zone as a lining to prevent corrosion of the base material of food equipment shall be in conformity with regulations for the Federal Food, Drug, and Cosmetic Act (21 U.S.C.A. § 301 et seq.) as published in the Code of Federal Regulations. (See 21 CFR 1.1 et seq.)
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