Excerpt from "National" Pipe Standards: Appendix to 1913 Edition Book of Standards; Containing Tables and Useful Information Pertaining to Tubular Goods as Manufactured by National Tube Company, Pittsburgh, Pa For a number of years National Tube Company has been publishing, at intervals, informatory, educational literature in various forms which has a widely acknowledged value, as evidenced by the constantly increasing requests from technical and practical engineers, mechanical men, manufacturers, students and many others interested in pipe and allied products. Much of the data will not be found elsewhere, for it represents years of research work in the mills and laboratories of this company; years of careful investigation of results of various materials installed under identical conditions of service, and in addition the reports made by unbiased authorities in the course of their service investigations. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.