DIN-2391-2-1994

DIN*ENGLISH2391*PT*294■279444b0038557222DEUTSCHE NORMSeptember 1994Seamless precision steel tubesDINTechnical delivery conditions2391Part 21CS23.040.10Supersedes July 1981Descriptors:Tube,steel tube.precision tube,technical delivery conditions.edition.Nahtlose Prazisionsstahlrohre (mit besonderer MaBgenauigkeit);technische LieferbedingungenIn keeping with current practice in standards published by the International Organization for Standardization (ISO),acomma has been used throughout as the decimal marker.Dimensions in mm1 Scope and field of applicationfor precision steel tubes.that do not require an inspec-1.1 This standard specifies technical delivery conditionstion certificate and thus are not subject to special re-for cold finished seamless precision steel tubes of the di-quirements,grade A;mensions listed in DIN 2391 Part 1,which are made fromfor precision steel tubes subject to special require-the steel grades listed in clause 4.ments,grade C.Such tubes are mainly used where accuracy to size and,In accordance with the stated demands of the purchaser.possibly,a small wall thickness,a particular surface condi-such special requirements and the relevant test methodstion and specific mechanical properties are required.shall be the subject of agreement.Table 10 lists possible1.2 This standard does not cover:additional requirements (for grade C).seamless circular unalloyed steel tubes subject tospecial requirements (cf.DIN 1629);high performance seamless circular unalloyed steeltubes (cf.DIN 1630):3seamless circular steel tubes for structural steelworkOrder detaiis and options(c1.DIN17121:The following information shall be supplied by the pur-seamless circular fine grain steel tubes for structuralchaser:steelwork (cf.DIN 17 124);a)the quantity,in metres;seamless circular tubes made from steel with low-b)a reference to this standard:temperature toughness(cf.DIN 17173);c)the quality grade;-seamless tubes made from steel with elevated tem-d)the steel grade;porature properties (cf.DIN 17175);e)the final supply condition;-seamless circular fine grain steel tubes subject tospecial requirements(cf.DIN 17179);f)the outside and inside diameters,or,where relevant,the outside diameter and wall thickness or inside diam-seamless circular tubes made from steel for quench-eter and wall thickness;ing and tempering(cf.DIN 17204);g)the type of tube length to be supplied:seamless circular austenitic stainiess steel tubessubject to special requirements(cf.DIN 17458);h)any inspection document agreed upon-steel pipes for conveying combustible liquids andDesignation for 1000 m seamless precision steel tubes,gases(cf.DIN 17172).made of St35 steel,normalized (NBK)as specified inSubject to agreement,tubes of dimensions specified inDIN 2391 Part 1,of quality grade C,with an outside diam-DIN 2391 Part 1 and in compliance with one of the stand-eter,D,of 100 mm and an inside diameter,D.of94 mm,inards listed above may be ordered in quality grade C.exact lengths of 4000 mm,with