Each joint of pipe welded receives a permanent weld identification number which is not only painted on the side of the pipe, but is recorded in the “as-built” drawing (which, show the location of every weld by number) and is imprinted on the radiograph of the completed weld., 1976-07, PCA0002-2b-13, Folder: PCA0002-2b. Alyeska Pipeline Service Company : Trans-Alaska Pipeline Construction Collection, 1976-1977, PCA 2. Alaska State Library - Historical Collections Finding Aids. https://alaska.libraryhost.com/repositories/2/archival_objects/17512 Accessed February 22, 2025.