COMMENTS ON THE CURRENT MANUFACTURING PROCESSES USED AT STEEL TUBE MILLS IN W. GERMANY——An ivestigation on foreign manufactrers （Part Ⅰ）

The article gives a detailed introduction to the current tube rolling processes used at Sieger Steel Tube Works, Bentler and Walzholz Steel Tube Works, Mannesmann, and also the technical data and parameters with respect to tee the equipments of CPE and Assel tube rolling mills are given, offering referable information concerning the experience for successes and the advanced techniques gained by the mentioned manufacturers.