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1、INTERNATIONAL STANDARD IS0 9330-3 First edition 1997-03-01 Welded steel tubes for pressure purposes - Technical delivery conditions - Part 3; Electric resistance and induction welded unalloyed and alloyed steel tubes with specified low temperature properties Tubes en acier soudks pour service sous p
2、ression - Conditions techniques de livraison - Partie 3: Tubes soudks par rtkistance blectrique et par induction en aciers non al/i - whether tubes are to be supplied hot-finished or cold-finished (voir 5.3); - reference to the relevant dimensional standard; - dimensions (outside diameter x wall thi
3、ckness) in millimetres (see 7.1); - length (see 7.2); - tolerances, if exact lengths greater than 12 m are ordered (see 7.3.3); - reference to this part of IS0 9330; - steel grade (see table 1); - test category for unalloyed steels (see 9.2). 4.2 Optional information Enquiries and orders for tubes i
4、n accordance with this part of IS0 9330 shall be supplemented, if it is deemed necessary by the purchaser, with the indi- cation of one or more of the following optional re- quirements, which shall be the subject of special agreements: - - - - - - - - - steelmaking process (see 5. I); special straig
5、htness requirements (see 7.3.5); bevelled ends (see 8.2); product chemical analysis (see 9.3 and 9.10.1) tensile testing of weld for tubes over 219 mm, but with an outside diameter less than 508 mm (see 9.4.3); leak-tightness test (see 9.5); specific marking (see 10.3); protective coating (see claus
6、e 1 I); type of inspection and testing and corresponding document (see 9.1 and clause 12). 4.3 Example of an order Example of an order for a hot-finished welded tube conforming to the dimensional standard IS0 4200, with an outside diameter of 168,3 mm, a wall thick- ness of 4 mm and a standard lengt
7、h (random length) of 4 m to 8 m, made of steel grade PL 21 with specified low temperature properties to be submitted to specific inspection and testing to test category II involving the issuing of an inspection certificate 3.1 .B according to IS0 10474: Tube Hot-finished IS0 4200 - 168.3 x 4 - 4 to
8、8 - IS0 9330-3 - PL 21 - II - 3.1.B 5 Manufacturing process 5.1 Steelmaking process If requested, the purchaser shall be informed of the steelmaking process used. Steels may be cast in ingots or may be strand cast. When steels of different grades are sequentially strand cast, identification of the r
9、esultant transitional material is required. The producer shall remove the transitional material by an established procedure that efficiently separates the grades. 5.2 Deoxidation process Steels intended for the production of tubes covered by this part of IS0 9330 shall be fully killed. 3 Copyright I
10、nternational Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/20/2007 02:28:33 MDTNo reproduction or networking permitted without license from IHS -,-,- IS0 9330-3:1997(E) 0 IS0 Steel grade ) Table 1 - Chemical
11、composition (heat analysis) % (m/m) P S Al total V Nb C Si tvln MO Ni max. max. min. max. max. - - - u PL 21 0,020 0,85 3,75 0.6 t 0.8 d 0.5 0,5 0.6 0.8 z 0.9 219 mm to D 508 mm, the test piece shall be taken in a direction transverse to the axis of the tube. The test piece shall not be taken next t
12、o the weld. 9.4.5.2 Test piece for the tensile test on the weld The test piece for the tensile test on the weld shall be taken transverse to the weld, with the weld at the centre of the test piece. The test piece shall be a strip section with the full thickness of the tube, and the weld bead may be
13、removed. 9.4.5.3 Test piece for the flattening test For tubes with D d 406 mm, the test piece for the flattening test shall consist of a tube section, in con- formity with IS0 8492. For tubes with D 406 mm, the flattening test may be carried out on a half-ring section of the tube. 9.4.5.4 Test piece
14、 for the bend test The test piece for the bend test consists of a section cut in the tube in accordance with the requirements of IS0 7438, with the weld at the centre of the test piece. 9.4.5.5 Test piece for the drift or ring expanding test or ring tensile test The test piece for the drift or ring
15、expanding test or ring tensile test consists of a tube section, in con- formity with IS0 8493 or IS0 8495 or IS0 8496, re- spectively. 9.4.5.6 Test pieces for the impact test For the impact test (see IS0 1481, a set of three IS0 V-notch test pieces shall be taken from each sample tube longitudinal t
16、o the tube axis. By agreement at the time of ordering, test pieces can be taken transverse to the tube axis, provided that the dimension of the tube permits this without flattening of the test piece. The minimum outside diameter D,i“ in millimetres, of the pipe necessary to take transversal test pie
17、ces may be calculated as a function of the wall thickness T by Dmi, = (T - 5) + 756 25 in mm CT - 5) The test pieces shall be taken and prepared in such a way that the axis of the notch is perpendicular to the surface of the tube. 9.4.5.6.1 The dimensions of the test pieces should preferably be 10 m
18、m x 10 mm. Test pieces having a width of less than 10 mm, but not below 5 mm, are also permitted. 9.4.5.6.2 In the case of test pieces less than 10 mm wide, the two faces perpendicular to the notch shall only be machined by the amount necess- ary to obtain a minimum dimension of 5 mm. 9.5 Leak-tight
19、ness test 9.5.1 All the tubes shall be submitted to a leak- tightness test. 9.5.2 Unless otherwise specified by the purchaser, the hydraulic leak-tightness test may be replaced, at the discretion of the manufacturer, by a non- destructive test (see 9.10.5.2). 9.6 Dimensional testing The tubes shall
20、be checked with respect to dimen- sions by suitable methods. The tolerance on diameter is normally measured across the diameter; however, for tubes where 11 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001
21、Not for Resale, 04/20/2007 02:28:33 MDTNo reproduction or networking permitted without license from IHS -,-,- IS0 9330-3:1997(E) 0 IS0 D 457 mm, this tolerance may be measured by a circumference tape. Unless otherwise specified at the time of enquiry and order, the wall thickness shall be measured a
22、t the tube ends. The ovality shall be measured across the diameter at the pipe ends, for a distance of 100 mm. 9.7 Visual examination The tubes shall be submitted to a visual examination to confirm, in particular, their conformity with the re- quirements of 8.1 and 8.2. 9.8 Non-destructive testing T
23、he tubes shall all be submitted to a non-destructive inspection of the weld seam (see 9.10.6.1). The tubes of test category II shall all be submitted to a non-destructive inspection for longitudinal defects (see 9.10.6.2). If agreed at the time of enquiry and order, tubes of test category II may als
24、o be submitted to non- destructive testing for transverse defects (see 9.10.6.3). 9.9 Material identification of alloyed steels Each alloyed steel tube shall be tested by an appro- priate method to ensure that the correct grade has been supplied. 9.10 Test methods and results 9.10.1 Chemical analysi
25、s 9.10.1.1 If agreed at the time of ordering, a check analysis shall be carried out (see 9.3.1 and 9.3.2). 9.10.1.2 The elements shall be determined in con- formity with the methods considered in the corre- sponding International Standards. Spectrographic analysis is permitted. 9.10.1.3 The results
26、shall comply with the values in table 1, taking into account the permissible deviations given in table2. 9.10.1.4 In the case of dispute about analytical methods, the chemical composition shall be deter- mined in accordance with a reference method in one of the International Standards listed in ISO/
27、TR 9769. 9.10.2 Tensile test 9.10.2.1 The tensile test shall be carried out at room temperature in conformity with IS0 6892 (see 9.4.3, 9.4.5.1 and 9.4.5.2). 9.10.2.2 The tensile strength (I for tubes with an outside diameter below 200 mm and above or equal to 152,4 mm, the flattening test or the ri
28、ng tensile test is usually carried out, for tubes with an outside diameter below 152.4 mm, only the flattening test is usually carried out. 9.10.3.2 Flattening test The flattening tests (see 9.4.3) shall be carried out according to IS0 8492. For the two flattening tests, the weld shall be at 0” and
29、90” (or equivalent) to the direction of the approach of the platens, respectively. The test shall be carried out in two stages: a) firstly, no crack shall appear in the weld up to the moment when the distance between the platens reaches two-thirds of the outside diameter of the tube; 12 Copyright In
30、ternational Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/20/2007 02:28:33 MDTNo reproduction or networking permitted without license from IHS -,-,- 0 IS0 IS0 9330-3:1997(E) b) then, the base material shall n
31、ot crack up to the moment when the distance between the platens reaches one-third of the outside diameter of the tube. A slight incipient crack at the edges shall not be re- garded as a justification for rejection. 9.10.3.3 Bend test 9.10.3.3.1 The bend test (see 9.4.3) shall be carried out in accor
32、dance with IS0 7438. One of the two test pieces shall be doubled over, cold, in the direction of initial curvature and the other in the opposite direction around a mandrel with a diameter as indicated in table3 for the steel grade concerned. The weld line being positioned at the centre of the test p
33、iece and the weld bead removed. 9.10.3.3.2 After testing, the test piece shall show no crack or flaw, but slight premature failure at the edges shall not be considered a cause for rejection. 9.10.3.4 Ring tensile test 9.10.3.4.1 The ring tensile test is only applicable for tubes with an outside diam
34、eter equal to or greater than 152,4 mm. The test shall be carried out in accordance with IS0 8496. 9.10.3.4.2 The tube section (see 9.4.5.5) shall be subjected to strain in the circumferential direction until fracture occurs, the weld line being placed at 90” to the line of pull. 9.10.3.4.3 After te
35、sting, the test piece shall show no crack visible without the use of magnifying aids. 9.10.4 Drift expanding test or ring expanding test 9.10.4.1 General At the option of the manufacturer, either a drift ex- panding test or a ring expanding test shall be carried out at room temperature (see 9.4.3).
36、9.10.4.2 Drift expanding test 9.10.4.2.1 The drift expanding test shall be carried out in accordance with IS0 8493. It is carried out on tubes with outside diameter up to 150 mm and a wall thickness up to 9 mm. The end of the tube section (see 9.4.5.5) shall be ex- panded on a conical mandrel until
37、the increase in the outside diameter of the expanded tube reaches the value indicated in table3 for the steel grade con- cerned. 9.10.4.2.2 After testing, the test piece shall show no crack or flaw, but slight premature failure at the edges shall not be considered a cause for rejection. 9.10.4.3 Rin
38、g expanding test 9.10.4.3.1 The ring expanding test shall be carried out in accordance with IS0 8495. The tube section (see 9.4.5.5) shall be expanded until the increase in the outside diameter reaches the value indicated in table3 for the steel grade concerned. 9.10.4.3.2 After testing, the test pi
39、ece shall show no crack or flaw, but slight premature failure at the edges shall not be considered a cause for rejection. 9.105 Leak-tightness test 9.10.5.1 Hydraulic test If the leak-tightness test is carried out by a hydraulic test, the test pressure is defined, up to a maximum of 80 bar, by the f
40、ollowing equation: PE = 20 x y where PE is the test pressure, in bars; D is the specified outside diameter, in milli- metres; T is the specified wall thickness, in milli- metres; s is the stress, in newtons per square milli- metre, corresponding to 80 % of the specified minimum value of ReH or R, or
41、 R t0,5 (see table31 for the steel grade con- cerned. The test pressure shall be maintained for at least 5 s. The tube shall withstand the test without showing leaks or deformation beyond the limits of the dimen- sional tolerances. 13 Copyright International Organization for Standardization Provided
42、 by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/20/2007 02:28:33 MDTNo reproduction or networking permitted without license from IHS -,-,- IS0 9330-3:1997(E) Q IS0 9.10.5.2 Non-destructive test If the tube is not submitted to the hydraulic test de- fi
43、ned in 9.10.5.1, it shall be submitted to a non- destructive test (see 9.5.2), namely; a) an electromagnetic test in accordance with IS0 9302, or b) an ultrasonic test in accordance with IS0 10332. 9.10.6 Non-destructive testing 9.10.6.1 All tubes shall be submitted to non- destructive testing of th
44、e weld seam in accordance with IS0 9764, with acceptance level L3. 9.10.6.2 Tubes of test category II shall be submitted to ultrasonic testing of the full periphery for longitudi- nal defects in accordance with IS0 9303, with ac- ceptance level L2. 9.10.6.3 If agreed at the time of enquiry and order
45、, tubes of test category II may also be submitted to non-destructive testing for the detection of transverse defects. The corresponding test method and the rel- evant acceptance level shall also be agreed upon at the time of enquiry and order. 9.10.7 impact testing 9.10.7.1 Impact testing shall be c
46、arried out (see 9.4.5.6) in accordance with IS0 148. The impact energy shall always be determined at the lowest test temperature specified for the steel grade and wall thickness concerned in table4; the values of impact energy at higher test temperatures shall be considered to have been demonstrated
47、 by the same determination. The mean value of the three test pieces (see 9.4.5.6) shall be taken. If the width of the test piece is less than 10 mm, the impact energy A, in joules, shall be calculated from the specified energy A , using the formula B A, = A , x 1. grade and wall thickness: only one
48、individual value may fall short of this minimum value by up to 30 %. 9.10.7.3 If the mean value of the three test pieces is below the minimum specified value, or if one indi- vidual value is less than the minimum specified value by more than 30 %, then three further test pieces shall be taken from t
49、he sample tube and shall be tested in accordance with IS0 148. 9.10.7.4 The mean value of all six tests shall corre- spond to the minimum value given in table4 for the relevant steel grade and wall thickness; of the six in- dividual values, only two may fall below this minimum value, and of these two, only one by more than 30 %. 9.11 Invalidation of the tests See IS0 404. 9.12 Retests See IS0 404. 9.13 Sorting o