All the welds on the trans Alaska pipeline are radio-graphed to ensure the weld quality meets specifications. More than 12 feet of film, encased in cassette belts are wrapped around the outside of the weld. At right, the weld identification is passed to the technician to be inserted beneath the film belt and recorded on the film., 1976-07, PCA0002-2b-36, 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/17535 Accessed February 22, 2025.