https://www.usa.gov/copyrighted-government-workshttps://www.rawpixel.com/image/12307142Edit ImageSaveSaveEditCropCustom Text Make it Yours.Edit, remix and personalize with your own textCustomizeOr start from these designsConversion. Copper and brass processing. Copper tube is made either by extrusion or piercing. In the piercing method, illustrated here, a hot round billet, or solid piece of copper, about fourty-five inches long, is rotated between tapered rolls and forced against a pointed mandrel which pierces the center of the billet. The billet then emerges in the form of a tube about eleven feet long. The Chase Copper and Brass Company, Euclid, Ohio. Sourced from the Library of Congress.View public domain image source hereMorePublic DomainFree CCO U.S. Government image for Personal and Business useInfoView CC0 LicenseEditorial use only JPEGTIFFSmall JPEG 1200 x 902 px | 300 dpiLarge JPEG 3500 x 2631 px | 300 dpiBest Quality JPEG 10211 x 7676 px | 300 dpiTIFF 10211 x 7676 px | 300 dpi | 149.5 MBEdit ImageMonthlyYearlySave 50%Get PremiumProfessional design resources and creative toolsfromfrom$6.50/mo$78 billed yearlyUnlimited downloadsAd-free experienceUnlock millions of creative assets and our entire Creative Studio of editable templates, mockups and design toolsBuy Now