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1、BRITISH STANDARD BS EN 10217-7:2005 Welded steel tubes for pressure purposes Technical delivery conditions Part 7: Stainless steel tubes The European Standard EN 10217-7:2005 has the status of a British Standard ICS 23.040.10; 77.140.75 BS EN 10217-7:2005 This British Standard was published under th
2、e authority of the Standards Policy and Strategy Committee on 25 February 2005 BSI 25 February 2005 ISBN 0 580 45610 2 National foreword This British Standard is the official English language version of EN 10217-7:2005. It supersedes BS 3605-2:1992, which is withdrawn. The UK participation in its pr
3、eparation was entrusted by Technical Committee ISE/73, Steels for pressure purposes, to Subcommittee ISE/73/1, Steel plates and bars for pressure purposes, which has the responsibility to: A list of organizations represented on this subcommittee can be obtained on request to its secretary. Cross-ref
4、erences The British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of Briti
5、sh Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present
6、 to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an ins
7、ide front cover, the EN title page, pages 2 to 37 and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. DateComments W - - - - - - - - - - - -7- - - - - - - - - - -A $ - - - - 1,00 2,00 0,10 0,6
8、0 0,03 Molybdenum 2.00 7,00 0,10 Niobium 1,00 0,05 5,00 0,07 5,00 10,00 0,10 10,00 20,00 0,15 Nickel 20,00 32,00 0,20 Titanium 0,70 0,05 Tungsten 1,00 0,05 a If several product analyses are carried out on one cast, and the contents of an individual element determined lie outside the permissible rang
9、e of the chemical composition specified for the cast analysis, then it is only allowed to exceed the permissible maximum value or to fall short of the permissible minimum value, but not both for one cast. EN 10217-7:2005 (E) 17 8.3 Mechanical properties 8.3.1 At room temperature The mechanical prope
10、rties of the tubes shall conform to the requirements in Tables 6 and 7 and in Clause 11. If heat treatments different from, or additional to, the reference heat treatment, are to be carried out after the delivery of the tubes, the purchaser may request, at the time of enquiry and order, additional m
11、echanical tests on samples, that have been given heat treatments different from or additional to, those given in Tables 6 and 7. The heat treatment of the samples and the mechanical properties to be obtained from tests on them shall be agreed between the purchaser and the manufacturer at the time of
12、 enquiry and order. Option 7: Additional mechanical tests on samples, which have undergone a different or additional heat treatment, shall be carried out. Option 8: Impact test shall be carried out at room temperature (see Tables 6 and 7). The location of the test pieces, either from the weld or opp
13、osite to the weld, shall be agreed at the time of enquiry and order. Option 9: (see Table 6, footnote a). 8.3.2 At elevated temperature The minimum proof strength Rp0,2 and Rp1,0 values at elevated temperatures are specified in Tables 8 and 9. Option 10: (see Table 8, footnote a). Option 11: Proof s
14、trength Rp0,2 or Rp1,0 shall be verified (for austenitic-ferritic steels in Table 9 only Rp0,2 apply). The test temperature shall be agreed at the time of enquiry and order. 8.3.3 At low temperature Impact energy values at specified low temperature shall conform to the requirements in Tables 6 and 7
15、. Option 12: Impact test at low temperature shall be carried out. The location of the test pieces, either from the weld or opposite to the weld, shall be agreed at the time of enquiry and order. EN 10217-7:2005 (E) 22 Table 9 Minimum proof strength Rp0,2 at elevated temperatures for wall thicknesses
16、 up to 30 mm of austenitic-ferritic steels in the solution annealed condition (+AT) and guideline for the limit temperature for intergranular corrosion Steel grade Rp0,2 min MPa Temperature C Steel name Steel number 50 100 150 200 250a X2CrNiMoN22-5-3 1.4462 415 360 335 310 295 X2CrNiN23-4 1.4362 37
17、0 330 300 280 265 X2CrNiMoN25-7-4 1.4410 502 450 420 400 380 X2CrNiMoCuWN25-7-4 1.4501 502 450 420 400 380 a Up to this temperature, the material should, within 100 000 h, not have changed so as to show susceptibility to intergranular corrosion, when tested in conformity with EN ISO 3651-2. See also
18、 Table 7. 8.4 Corrosion resistance The information given in Tables 6 and 7 refers to the resistance of the steels to intergranular corrosion when tested according to EN ISO 3651-2 to the indicated method A or B or C. Guideline values for the limit temperature for susceptibility to intergranular corr
19、osion are indicated in Tables 8 and 9. Option 13: A test for the resistance to intergranular corrosion shall be carried out. If other specific corrosion tests are required, they shall be agreed at the time of enquiry and order. 8.5 Appearance and internal soundness 8.5.1 Appearance 8.5.1.1 The tubes
20、 shall be free from external and internal surface defects that can be established by visual inspection. 8.5.1.2 The internal and external surface finish of the tubes shall be typical of the manufacturing process and, where applicable, the heat treatment employed. Normally the finish and surface cond
21、ition shall be such that any surface imperfections requiring dressing can be identified. 8.5.1.3 It shall be permissible to dress, only by grinding or machining, surface imperfections provided that, after doing so, the wall thickness in the dressed area is not less than the specified minimum thickne
22、ss. All dressed areas shall blend smoothly into the contour of the tube. 8.5.1.4 Surface imperfections which encroach on the specified minimum wall thickness shall be considered defects and tubes containing these shall be deemed not to conform to this Part of EN 10217. 8.5.1.5 Repairs to the weld ar
23、e permitted only by agreement with the purchaser. Any repairs shall be carried out before heat treatment and all repaired areas shall be non-destructively tested according to 11.11. Option 14: Repair welding is permitted by agreement by the purchaser. For tubes welded with or without filler metal, w
24、ith a diameter greater or equal to 168,3 mm, weld repair may be made with the addition of compatible filler metal. Weld repairs shall not exceed 20 % of the seam length. The repair welding shall be carried out according to a written welding procedure specification (WPS). EN 10217-7:2005 (E) 23 8.5.2
25、 Internal soundness 8.5.2.1 General The weld area shall be free from cracks, lack of fusion and lack of penetration. 8.5.2.2 Leak-tightness The tubes shall pass a hydrostatic test (see 11.8.1) or an eddy current test (see 11.8.2) for leak-tightness. Unless option 15 is specified, the choice of the t
26、est method is at the discretion of the manufacturer. Option 15: The test method for verification of leak-tightness according to 11.8.1 or 11.8.2 is specified by the purchaser. 8.5.2.3 Non-destructive testing The full length of the weld seam of tubes shall be submitted to a non-destructive testing fo
27、r the detection of imperfections according to Clause 11.11.1. Option 16: The tubes of test category 2 shall be submitted to a non-destructive testing for the detection of laminar imperfections at the tube ends according to Clause 11.11.2. Option 17: The edges of strip or plate used for the manufactu
28、re of tubes of test category 2 shall be submitted to a non-destructive testing for the detection of laminar imperfections according to Clause 11.11.3. 8.6 Straightness The deviation from straightness of any tube length L shall not exceed 0,0015 L. Deviations from straightness over any one meter leng
29、th shall not exceed 3 mm. 8.7 Preparation of ends Tubes shall be delivered with square cut ends. The ends shall be free from excessive burrs. Option 18: Tubes with wall thickness 3,2 mm shall be delivered with bevelled ends (see figure 1). The bevel shall have an angle of 30 5 0 with a root face C o
30、f 1,6 mm 0,8 mm, except that for wall thickness greater than 20 mm, an agreed alternative bevel may be specified EN 10217-7:2005 (E) 24 24 Key a Angle c Root face D Outside diameter Figure 1 Tube end bevel 8.8 Dimensions, masses and tolerances 8.8.1 Outside diameter and wall thickness Tubes shall be
31、 ordered by outside diameter D and wall thickness T. Preferred outside diameters D and wall thicknesses T are given in EN ISO 1127. 8.8.2 Mass For the calculation of mass per unit length the density values given in EN 10088-1 shall be used. 8.8.3 Lengths Unless Option 19 is specified, the tubes may
32、be delivered in random lengths. The delivery range shall be agreed at the time of enquiry and order. Option 19: The tubes shall be delivered in exact lengths and the length shall be specified at the time of enquiry and order. The tolerances on these lengths shall conform to 8.8.4.4. 8.8.4 Tolerances
33、 8.8.4.1 Tolerance on outside diameter and on wall thickness The diameter and the wall thickness of the tubes shall be within the relevant tolerance limits given in Table 10. Tolerance classes are according to EN ISO 1127. EN 10217-7:2005 (E) 25 Table 10 - Tolerances on outside diameter and wall thi
34、ckness Tolerance on outside diameter D Tolerance on wall thickness T Outside diameter D mm Tolerance class Permissible deviation Tolerance class Permissible deviation D3 0,75 % or 0,3 mm whichever is the greater D 168,3 D4a 0,5 % or 0,1 mm whichever is the greater D 168,3 D2 1,0 % T3 10 % or 0,2 mm
35、whichever is the greater a Option 20: Tolerance class D4 is specified. 8.8.4.2 Height of the weld seam The height of the external and internal weld seam shall be within the limits indicated in Table 11. Table 11 - Maximum height of the weld seam Dimensions in millimeters Maximum height of the weld s
36、eam Route (according to Table 1) Weld condition T 8 T 8 01 and 04 As welded 0,10 T + 0,5 T/6 Welded, outside ground for D 114,3 0,06 T + 0,3 - 02 and 05 Welded, outside ground for D 114,3 0,05 T + 0,5 T/10 03 and 05 Welded, bead worked 0,15 - 8.8.4.3 Radial offset of plate or strip edges at the weld
37、 The radial offset of the abutting plate or strip edges shall be within 10 % of the specified wall thickness. EN 10217-7:2005 (E) 26 26 8.8.4.4 Tolerances on exact lengths The tolerances for exact lengths shall be as given in Table 12. Table 12 - Tolerances on exact lengths Length L (mm) Tolerance o
38、n exact length (mm) L 6 000 + 5 0 6000 L 12 000 + 10 0 L 12 000 + by agreement 0 EN 10217-7:2005 (E) 27 8.8.4.5 Out of roundness The out-of-roundness (0) shall be calculated using the following equation: 1000 minmax D DD (1) where: 0 = out-of-roundness, in %; D max, D min = maximum and minimum outsi
39、de diameter, measured in the same plane, in mm; D = specified outside diameter, in mm. For tubes of outside diameter D 406,4 mm, out-of-roundness, shall be included in the limits of the diameter tolerances. For tubes of outside diameter D 406,4 mm and with D/T 100, out-of-roundness shall not exceed
40、2 %. For tubes with a D/T ratio 100 the values for out-of-roundness shall be agreed at the time of enquiry and order. 9 Inspection 9.1 Type of inspection Conformity to the requirements of the order, for tubes according to this Part of EN 10217, shall be checked by specific inspection. When an inspec
41、tion document 3.1.B is specified, the material manufacturer shall state in the confirmation of the order whether he is operating according to a “quality-assurance system”, certified by a competent Body established within the Community, and having undergone a specific assessment for materials and pro
42、cesses relevant to manufacture of welded tubes, including welding procedure approvals, welder/weld operator approval and NDT operator approval. NOTE See Directive 97/23/EC Annex I section 4.3 third paragraph 9.2 Inspection documents 9.2.1 Types of inspection documents Unless option 21 is specified,
43、an inspection certificate 3.1.B, according to EN 10204, shall be issued. Option 21: One of the inspection documents 3.1.C or 3.2 according to EN 10204 shall be issued. If an inspection document 3.1.C or 3.2 is specified, the purchaser shall notify the manufacturer of the name and address of the orga
44、nization or person who is to carry out the inspection and produce the inspection document. In the case of the inspection report 3.2 it shall be agreed which party shall issue the certificate. 9.2.2 Content of inspection documents The content of the inspection document shall be according to EN 10168.
45、 In all types of inspection documents a statement on the conformity of the products delivered with the requirements of the specification and the order shall be included. The inspection certificate or inspection report shall contain the following codes and information: A commercial transactions and p
46、arties involved; EN 10217-7:2005 (E) 28 28 B description of products to which the inspection document applies; C01-C03 location of the samples and direction of the test pieces and testing temperature; C10-C13 tensile test; C40-C43 impact test if applicable; C60-C69 other tests (e.g. flattening); C71
47、-C92 chemical composition on cast analysis (product analysis if applicable); D01 marking and identification, surface appearance, shape and dimensional properties; D02-D99 leak-tightness, NDT, material identification; Reference to welding procedure approval; Reference to welder and or welding operato
48、r approval; Reference to non-destructive testing operators approval; Z validation. In addition for inspection document 3.1.B the manufacturer shall state the references to the certificate (see 9.1) of the appropriate “quality-assurance system“, if applicable. 9.3 Summary of inspection and testing The tubes shall be inspected and tested according to test category 1 or test category 2 as specified at the time of enquiry and order (see