This document specifies technical delivery conditions for two test categories of submerged arc longitudinally (SAWL) or helically (SAWH) 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 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 this 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 the subsequent manufacturing processes 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 <\/td>\n<\/tr>\n | ||||||
| 11<\/td>\n | 6 Information to be supplied by the purchaser 6.1 Mandatory information 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 <\/td>\n<\/tr>\n | ||||||
| 14<\/td>\n | 8.2 Chemical composition 8.2.1 Cast analysis 8.2.2 Product analysis <\/td>\n<\/tr>\n | ||||||
| 16<\/td>\n | 8.3 Mechanical properties <\/td>\n<\/tr>\n | ||||||
| 18<\/td>\n | 8.4 Appearance and internal soundness 8.4.1 Weld seam 8.4.2 Tube surface 8.4.3 Internal soundness 8.4.3.1 Leak tightness 8.4.3.2 Non-Destructive Testing <\/td>\n<\/tr>\n | ||||||
| 19<\/td>\n | 8.5 Straightness 8.6 Preparation of ends 8.7 Dimensions, masses and tolerances 8.7.1 Diameter and wall thickness 8.7.2 Mass <\/td>\n<\/tr>\n | ||||||
| 22<\/td>\n | 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 8.7.4.3 Radial offset of plate or strip edges at the weld <\/td>\n<\/tr>\n | ||||||
| 23<\/td>\n | 8.7.4.4 Misalignment of the weld seam 8.7.4.5 Tolerances on exact length 8.7.4.6 Out of roundness <\/td>\n<\/tr>\n | ||||||
| 24<\/td>\n | 9 Inspection 9.1 Type of inspection 9.2 Inspection documents 9.2.1 Types of inspection documents 9.2.2 Content of inspection documents\u00b5 <\/td>\n<\/tr>\n | ||||||
| 25<\/td>\n | 9.3 Summary of inspection and verification testing <\/td>\n<\/tr>\n | ||||||
| 27<\/td>\n | 10 Sampling 10.1 Frequency of tests 10.1.1 Test unit 10.1.2 Number of sample tubes per test unit 10.2 Preparation of samples and test pieces 10.2.1 Selection and preparation of samples for product analysis <\/td>\n<\/tr>\n | ||||||
| 28<\/td>\n | 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 weld bend test 10.2.2.5 Test pieces for impact tests on the tube body <\/td>\n<\/tr>\n | ||||||
| 29<\/td>\n | 10.2.2.6 Test pieces for impact tests on the weld 11 Verification of test methods 11.1 Chemical analysis <\/td>\n<\/tr>\n | ||||||
| 30<\/td>\n | 11.2 Tensile test on the tube body 11.2.1 At room temperature 11.2.2 At elevated temperature 11.3 Traverse tensile test on the weld 11.4 Weld bend test 11.5 Impact test <\/td>\n<\/tr>\n | ||||||
| 31<\/td>\n | 11.6 Hydrostatic leak tightness test 11.7 Dimensional inspection <\/td>\n<\/tr>\n | ||||||
| 32<\/td>\n | 11.8 Visual examination 11.9 Non-Destructive Testing 11.9.1 Non-Destructive Testing of the weld seam 11.9.2 Non-Destructive Testing for the detection of laminations for tubes of test category 2 <\/td>\n<\/tr>\n | ||||||
| 33<\/td>\n | 11.9.3 Supply of strip end welds in SAWH tubes 11.10 Material identification 11.11 Retests, sorting and reprocessing 12 Marking 12.1 Marking to be applied <\/td>\n<\/tr>\n | ||||||
| 34<\/td>\n | 12.2 Additional marking 13 Protection <\/td>\n<\/tr>\n | ||||||
| 35<\/td>\n | Annex A (normative)Qualification of welding procedure A.1 General A.2 Welding procedure specification A.2.1 General A.2.2 Parent metal Steel name or number A.2.2.2 Tube dimensions A.2.3 Weld preparation A.2.4 Filler wires and fluxes <\/td>\n<\/tr>\n | ||||||
| 36<\/td>\n | A.2.5 Electrical parameters A.2.6 Mechanical parameters A.2.7 Heat input (kJ\/mm) A.2.8 Preheat temperature A.2.9 Interpass temperature A.2.10 Postweld heat treatment A.2.11 Example of welding procedure specification form <\/td>\n<\/tr>\n | ||||||
| 37<\/td>\n | A.3 Preparation of sample tube and sample assessment A.3.1 Sample tube A.3.2 Sample assessment <\/td>\n<\/tr>\n | ||||||
| 38<\/td>\n | A.4 Inspection and testing of the weld A.5 Weld test pieces A.5.1 Weld bend test pieces A.5.2 Macro-examination A.5.3 Transverse weld tensile test A.5.4 Weld impact test A.6 Test methods A.6.1 Visual examination A.6.2 NDT test A.6.3 Weld bend test <\/td>\n<\/tr>\n | ||||||
| 39<\/td>\n | A.6.4 Macro-examination A.6.5 Transverse weld tensile test A.6.6 Weld impact test A.7 Test acceptance levels A.7.1 Visual examination A.7.2 NDT test A.7.3 Weld bend test A.7.4 Macro-examination A.7.5 Transverse weld tensile test <\/td>\n<\/tr>\n | ||||||
| 40<\/td>\n | A.7.6 Weld impact test A.7.7 Example of test result document <\/td>\n<\/tr>\n | ||||||
| 41<\/td>\n | A.8 Range of use of qualified procedures A.8.1 Materials groups A.8.2 Materials thickness A.8.3 Filler wire classification <\/td>\n<\/tr>\n | ||||||
| 42<\/td>\n | A.8.4 Welding flux A.8.5 Other parameters A.9 Qualification record <\/td>\n<\/tr>\n | ||||||
| 43<\/td>\n | Annex B (informative)Technical changes from the previous edition B.1 Introduction B.2 Technical changes <\/td>\n<\/tr>\n | ||||||
| 45<\/td>\n | Annex ZA(informative)Relationship between this European Standard and the Essential Requirements of EU Directive 2014\/68\/EU <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":" Welded steel tubes for pressure purposes. Technical delivery conditions – Submerged arc welded non-alloy and alloy steel tubes with specified elevated temperature properties<\/b><\/p>\n |