This document specifies the technical delivery conditions for two test categories of electric welded tubes of circular cross section, with specified elevated temperature properties, made from non-alloy quality steel or alloy special steel. NOTE 1 These tube grades are intended to support the essential requirements of EU Directive 2014\/68\/EU in respect of pressure equipment with specified elevated temperature properties, covered under all relevant Categories as set out in Article 13 of that Directive. NOTE 2 Once this standard is published in the Official Journal of the European Union (OJEU), presumption of conformity to the Essential Safety Requirements (ESR) of Directive 2014\/68\/EU is limited to the technical data for the materials in this standard and does not presume adequacy of the material for a specific item of pressure equipment. Consequently, the assessment of the technical data stated in this material standard against the design requirements of a specific item of equipment to verify that the ESRs of the Pressure Equipment Directive are satisfied, needs to be done by the designer or manufacturer of the pressure equipment, taking also into account any subsequent processing procedures which may affect properties of the base materials.<\/p>\n
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| 2<\/td>\n | undefined <\/td>\n<\/tr>\n | ||||||
| 8<\/td>\n | 1 Scope 2 Normative references <\/td>\n<\/tr>\n | ||||||
| 9<\/td>\n | 3 Terms and definitions <\/td>\n<\/tr>\n | ||||||
| 10<\/td>\n | 4 Symbols 5 Classification and designation 5.1 Classification 5.2 Designation 6 Information to be supplied by the purchaser 6.1 Mandatory information <\/td>\n<\/tr>\n | ||||||
| 11<\/td>\n | 6.2 Options <\/td>\n<\/tr>\n | ||||||
| 12<\/td>\n | 6.3 Example of an order 7 Manufacturing process 7.1 Steelmaking process 7.2 Tube manufacture and delivery conditions <\/td>\n<\/tr>\n | ||||||
| 13<\/td>\n | 7.3 Non Destructive Testing Personnel Requirements 8 Requirements 8.1 General 8.2 Chemical composition 8.2.1 Cast analysis <\/td>\n<\/tr>\n | ||||||
| 15<\/td>\n | 8.2.2 Product analysis 8.3 Mechanical properties <\/td>\n<\/tr>\n | ||||||
| 16<\/td>\n | 8.4 Appearance and internal soundness 8.4.1 Weld seam <\/td>\n<\/tr>\n | ||||||
| 17<\/td>\n | 8.4.2 Tube surface 8.4.3 Internal soundness 8.4.3.1 Leak-tightness 8.4.3.2 Non-Destructive Testing 8.5 Straightness 8.6 Preparation of ends <\/td>\n<\/tr>\n | ||||||
| 18<\/td>\n | 8.7 Dimensions, masses and tolerances 8.7.1 Diameter and wall thickness <\/td>\n<\/tr>\n | ||||||
| 22<\/td>\n | 8.7.2 Mass 8.7.3 Lengths 8.7.4 Tolerances 8.7.4.1 Tolerances on diameter and thickness 8.7.4.2 Height of the weld seam <\/td>\n<\/tr>\n | ||||||
| 23<\/td>\n | 8.7.4.3 Tolerances on exact length 8.7.4.4 Out-of-roundness 9 Inspection 9.1 Type of inspection 9.2 Inspection documents 9.2.1 Types of inspection documents <\/td>\n<\/tr>\n | ||||||
| 24<\/td>\n | 9.2.2 Content of inspection documents 9.3 Summary of inspection and testing <\/td>\n<\/tr>\n | ||||||
| 26<\/td>\n | 10 Sampling 10.1 Frequency of tests 10.1.1 Test unit 10.1.2 Number of sample tubes per test unit <\/td>\n<\/tr>\n | ||||||
| 27<\/td>\n | 10.2 Preparation of samples and test pieces 10.2.1 Selection and preparation of samples for product analysis 10.2.2 Location, orientation and preparation of samples and test pieces for mechanical tests 10.2.2.1 General 10.2.2.2 Test pieces for tensile tests on the tube body 10.2.2.3 Test pieces for tensile tests on the weld 10.2.2.4 Test pieces for flattening test, ring tensile test, drift expanding test, ring expanding test 10.2.2.5 Test pieces for impact tests on the tube body <\/td>\n<\/tr>\n | ||||||
| 28<\/td>\n | 11 Verification of test methods 11.1 Chemical analysis 11.2 Tensile test on the tube body 11.2.1 At room temperature 11.2.2 At elevated temperature <\/td>\n<\/tr>\n | ||||||
| 29<\/td>\n | 11.3 Transverse tensile test on the weld 11.4 Flattening test 11.5 Ring tensile test 11.6 Drift expanding test <\/td>\n<\/tr>\n | ||||||
| 30<\/td>\n | 11.7 Ring expanding test 11.8 Impact test <\/td>\n<\/tr>\n | ||||||
| 31<\/td>\n | 11.9 Leak tightness test 11.9.1 Hydrostatic test 11.9.2 Electromagnetic test 11.10 Dimensional inspection <\/td>\n<\/tr>\n | ||||||
| 32<\/td>\n | 11.11 Visual examination 11.12 Non-Destructive Testing 11.13 Material identification 11.14 Retests, sorting and reprocessing <\/td>\n<\/tr>\n | ||||||
| 33<\/td>\n | 12 Marking 12.1 Marking to be applied 12.2 Additional marking 13 Protection <\/td>\n<\/tr>\n | ||||||
| 34<\/td>\n | Annex A(informative)Technical changes from the previous edition A.1 Introduction A.2 Technical changes <\/td>\n<\/tr>\n | ||||||
| 36<\/td>\n | Annex ZA (informative)Relationship between this European Standard and the Essential Requirements of 2014\/68\/EU <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":" Welded steel tubes for pressure purposes. Technical delivery conditions – Electric welded non-alloy and alloy steel tubes with specified elevated temperature properties<\/b><\/p>\n |