AWWA 7A.5-1949: Coal-Tar Enamel Protective Coatings for Steel Water Pipe of Sizes 30 In. and Over, and 7A.6-1949: Coal-Tar Enamel Protective Coatings for Steel Water Pipe of Sizes Up to 30 In. (PDF)
SKU: STC_0073871-PDF
These specifications cover the material and application requirements for coal-tar enamel protective coatings for steel water pipe of large diameter (7A.5), and also steel water pipe up to, but not including, 30 in. in diameter (7A.6), where conditions warrant their use. An appendix has been added to these specifications to provide additional exterior protective measures for extraordinary or severe soil conditions. The purchaser, when inviting bids, shall specify his requirements for protective coating by referring to the designation of these specifications and to the section and subdivision of the appendix for the type of additional protection if such be required. In addition, the purchaser shall supply certain detailed information covering each individual contract in accordance with 7A.5, Sec.5-1.3, and 7A.6, Sec.6-1.3 of these specifications. The 7A.1, 7A.2, 7A.3, 7A.5, 7A.6, and 7A.7 Committee reports are tentative specifications and are published to solicit constructive criticism from the membership as a whole.
Description
Three reports (7A.5, 7A.6, and 7A.7) have been prepared to provide protection for steel water pipe for both underground and surface requirements. However, it is recognized by this committee that in some waters and in some soils, protection to the inside and outside pipe surfaces is not necessary and this committee does not attempt to make mandatory the use of such protection or to evaluate the condition of its use. -The above paragraph is found on page 1 of the insert in the yellow-covered publication, "For Use of 7A Committee Only." (reprinted from the Journal AWWA, Vol. 32, No.1, January 1940)