DIN1629-1984-Seamless-Circular-Unalloyed-Steel-Tubes-Subject-to-special-requirements

Hebei Haihao GroupUDC821.643.2-034.14-462.3:620.1October 1984Seamless circular unalloyed steel tubesNsubject to special requirementsTechnical delivery conditions1629Nahtlose kreisformige Rohre aus unlegierten Stahlen furSupersedes DIN 1629 Part 3,besondere Anforderungen;technische LieferbedingungenJanuary 1961 edition,and parts of DIN 1629 Part 1.January 1961 editionIn keeping with current practice in standards published by the International Organization for Standardization (ISO),a comma has been used throughout as the decimal marker.The subclauses marked with a single dot give specifications which are to be agreed upon at the time of ordering.The subclauses marked with two dots give specifications which are optional and may be agreed upon at the time ofordering.ContentsPagePage1 Field of application15 Testing and documents on materials testing ....62 Classification into grades,.,,。,..·.。.,,·..15.1General,,,,,,.,,,,,,...。,.,,,,.。,63 Designation and ordering252 Test site,...··64 Requirements,,···。·············…···25,3 Scope of test programme..············84.1 Manufacturing process25.4 Sampling and sample preparation .........84.2As delivered condition25.5 Test procedure+，，。。。。▣，。。。。。。。。74.3Chemical composition5.64.4 Mechanical properties .................45.7 Documents on materials testing,,,·····+04.5 Technological properties.....·.··.······44.6 Weldability,......,.,.,,...。,.。.。。·6 Marking。84.7 Appearance of surface44.8 Leak tightness,…···:····…47 Complaints,,,·84.9 Dimensions,masses per unit lengthAppendix A Elevated temperature upper yieldand permissible deviations ...............stress values for tubes............81 Field of application1.2 This standard does not apply to1.1 This standard applies to seamless circular tubes and-high performance seamless circular unalloyed steelpipes (hereinafter briefly referred to as "tubes")madetubes (see DIN 1630):of unalloyed steels as listed in table 2.These tubes are一seamless circular steel tubes for structural steelworkpredominantly used in the construction of chemical(see DIN17121);plant,vessels,pipework and for general mechanicalseamless creep-resisting steel tubes (see DIN 17 175)engineering purposes.The maximum permissible workingseamless precision steel tubes (see DIN 2391 Part 2)pressure and permissible working temperature are speci-fied in table 1.(The upper yield stress values for tubes atmedium-weight threaded steel tubes (see DIN 2440):temperatures up to 300C are specified in Appendix A.)heavyweight threaded steel tubes (see DIN 2441).The limits of application and other specifications givenin this standard shall apply except in cases where otherspecifications are contained in codes of practice forspecific fields of application,e.g.the Technische Regeln2 Classification into gradesfur Dampfkesse/(TRD)(Technical rules on steamThis standard covers tubes made from the steel gradesboilers)or the Technische Regein fur Druckbehalter (TRB]shown in table 2.(Technical rules on pressure vessels),AD-Merkblat