DIN2391-2-1994бесшовныепрецизионныетрубычасть2参考技术资料

DEUTSCHE NORMSeptember 1994Seamless precision steel tubesNTechnical delivery conditions2391Part21c523.040.10Supersedes Juty 1981edition.Descriptors:Tube,steel tube,precision tube,technical delivery conditions.Nahtlose Prazisionsstahlrohre (mit besonderer MaBgenauigkelt);technische LleferbedingungenIn keeping with current practice in standards published by the international Organization for Standardization (SO),acomma has been used throughout as the decimal marker.Dimensions in mm1Scope and field of applicationfor precision steel tubes,that do not require an inspec-可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 speclal 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 condl-such special requirements and the relevant test methodstion and specific mechanical properties are required.shall be the subject of agreement.Table 10 lists possiblensuos eq pinoysadditional requirements (for grade C).1.2 This standard does not cover:-seamiess circular unalloyed steel tubes subject tospecial requlrements (cf.DIN 1629):high performance seamless circular unalloyed steeltubes(ct,DiN1630)月3 Order details and optionsseamless circular steel tubes for structural steelworkuo 5an BuPj-Uew9(cf.DN17121:The following information shall be supplied by the pur-seamless circular fine grain steel tubes for structuralchaser:steelwork (cf.DIN 17124);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;perature 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;8seamless circular austenltic stainless steel tubesh)any inspection document agreed uponsubject to special requirements (cf.DIN 17458):Designation for 1000 m seamless precision steel tubes,steel plpes for conveying combustible liquids and2made of St 35 steel,normalized (NBK)as specitied ingases (cf.DIN 17172).DIN 2391 Part 1,of quality grade C.with an outside diam-Subject to agreement,tubes of dimensions specified ineter,D,of 100 mm and an inside diameter,D,of 94 mm,inDIN 2391 Part 1 and in compliance with one of the stand-exact lengths of 4000 mm,with type 3.1.B inspection cer-ards listed above may be ordered