Illinois Society of Architects · Chicago · leaf 27
AL Pipe—When you read it you will keep it on file for permanent use—Its free ^ To readily identify-NATIONAL-material and as protection tomanufacturer and consumer alike,the practice of National TubeCompany is to roll in raised lettersof good size on each few feet ofevery len);lh of welded pipe… … ^ ^A/llen writing specifications orordering tubular goods, alwaysspecify NATIONAL pipe, andidentify as indicated.<3 In addition, all sizes ofNATIONALwelded pipe belowfour or five inches are subjected toa roll-knobbling process known asSpellerizing to lessen the tendencyto corrosion, especially m…
Architecture · Building · Architects
Internet Archive · University of Illinois Urbana-Champaign · Public Domain Mark 1.0. Free to use for anything.
