This document specifies the technical delivery conditions for two test categories of electric welded and submerged arc longitudinally (SAWL) or helically (SAWH) welded tubes of circular cross section, made from weldable fine grain 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 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
| PDF Pages<\/th>\n | PDF Title<\/th>\n<\/tr>\n | ||||||
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| 2<\/td>\n | undefined <\/td>\n<\/tr>\n | ||||||
| 9<\/td>\n | 1 Scope 2 Normative references <\/td>\n<\/tr>\n | ||||||
| 11<\/td>\n | 3 Terms and definitions <\/td>\n<\/tr>\n | ||||||
| 12<\/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 | ||||||
| 13<\/td>\n | 6.2 Options <\/td>\n<\/tr>\n | ||||||
| 14<\/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 | ||||||
| 15<\/td>\n | 7.3 Non Destructive Testing Personnel Requirements <\/td>\n<\/tr>\n | ||||||
| 16<\/td>\n | 8 Requirements 8.1 General 8.2 Chemical composition 8.2.1 Cast analysis <\/td>\n<\/tr>\n | ||||||
| 18<\/td>\n | 8.2.2 Product analysis 8.3 Grain size 8.4 Mechanical properties <\/td>\n<\/tr>\n | ||||||
| 21<\/td>\n | 8.5 Appearance and internal soundness 8.5.1 Weld seam 8.5.2 Tube surface <\/td>\n<\/tr>\n | ||||||
| 22<\/td>\n | 8.5.3 Internal soundness 8.5.3.1 Leak tightness 8.5.3.2 Non-Destructive Testing 8.6 Straightness 8.7 Preparation of ends <\/td>\n<\/tr>\n | ||||||
| 23<\/td>\n | 8.8 Dimensions, masses and tolerances 8.8.1 Diameters and wall thickness <\/td>\n<\/tr>\n | ||||||
| 29<\/td>\n | 8.8.2 Mass 8.8.3 Lengths 8.8.4 Tolerances 8.8.4.1 Tolerances on diameter and thickness 8.8.4.2 Height of the weld seam <\/td>\n<\/tr>\n | ||||||
| 30<\/td>\n | 8.8.4.3 Radial offset of plate or strip edges at the weld of SAW tubes 8.8.4.4 Misalignment of the weld seam of SAW tubes <\/td>\n<\/tr>\n | ||||||
| 31<\/td>\n | 8.8.4.5 Tolerances on exact length 8.8.4.6 Out-of-roundness 9 Inspection 9.1 Type of inspection <\/td>\n<\/tr>\n | ||||||
| 32<\/td>\n | 9.2 Inspection documents 9.2.1 Types of inspection documents 9.2.2 Content of inspection documents 9.3 Summary of inspection and testing <\/td>\n<\/tr>\n | ||||||
| 35<\/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 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 <\/td>\n<\/tr>\n | ||||||
| 36<\/td>\n | 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 weld bend tests (SAW tubes) 10.2.2.6 Test pieces for impact tests on the tube body <\/td>\n<\/tr>\n | ||||||
| 37<\/td>\n | 10.2.2.7 Test pieces for impact tests on the weld 11 Verification of test methods 11.1 Chemical analysis 11.2 Tensile test 11.2.1 Tensile test on the tube body 11.2.1.1 At room temperature <\/td>\n<\/tr>\n | ||||||
| 38<\/td>\n | 11.2.1.2 At elevated temperature 11.2.2 Transverse tensile test on the weld 11.3 Flattening test 11.4 Ring tensile test 11.5 Drift expanding test <\/td>\n<\/tr>\n | ||||||
| 39<\/td>\n | 11.6 Ring expanding test 11.7 Weld bend test 11.8 Impact test <\/td>\n<\/tr>\n | ||||||
| 40<\/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 | ||||||
| 41<\/td>\n | 11.11 Visual examination 11.12 Non-Destructive Testing 11.12.1 Non-Destructive Testing of HFW tubes 11.12.2 Non-destructive testing of SAW tubes 11.12.2.1 Non-Destructive Testing of the weld seam <\/td>\n<\/tr>\n | ||||||
| 42<\/td>\n | 11.12.2.2 Non-Destructive Testing for the detection of laminations for tubes of test category 2 11.12.2.3 Supply of strip end welds in SAWH tubes 11.13 Material identification 11.14 Retests, sorting and reprocessing <\/td>\n<\/tr>\n | ||||||
| 43<\/td>\n | 12 Marking 12.1 Marking to be applied 12.2 Additional marking 13 Protection <\/td>\n<\/tr>\n | ||||||
| 44<\/td>\n | Annex A (normative)Qualification of welding procedure for SAW tube production A.1 General A.2 Welding procedure specification A.2.1 General A.2.2 Parent metal A.2.2.1 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 | ||||||
| 45<\/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 form A.3 Preparation of sample tube and sample assessment A.3.1 Sample tube A.3.2 Sample assessment <\/td>\n<\/tr>\n | ||||||
| 47<\/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 | ||||||
| 48<\/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 A.7.6 Weld impact test <\/td>\n<\/tr>\n | ||||||
| 49<\/td>\n | A.7.7 Example of test result document <\/td>\n<\/tr>\n | ||||||
| 50<\/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 A.8.4 Welding flux <\/td>\n<\/tr>\n | ||||||
| 51<\/td>\n | A.8.5 Other parameters A.9 Qualification record <\/td>\n<\/tr>\n | ||||||
| 52<\/td>\n | Annex B (normative)Elevated temperature properties for steel grades P275NL1 and NL2 <\/td>\n<\/tr>\n | ||||||
| 53<\/td>\n | Annex C (informative)Technical changes from the previous edition C.1 Introduction C.2 Technical changes <\/td>\n<\/tr>\n | ||||||
| 55<\/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 and submerged arc welded alloy fine grain steel tubes with specified room, elevated and low temperature properties<\/b><\/p>\n |