BS EN 10305-3:2010 pdf download

BS EN 10305-3:2010 pdf download.Steel tubes for precision applications Technical delivery conditions Part 3: Welded cold sized tubes.
27) specified corrosion protection (see Clause 13);
28) unbundled tubes or specific method of packag,ng (see Clause 13).
6.3 Example of an order
12 000 m tube with an outside diameter of 40 mm and a wall thickness of 1.5 mm in accordance with this document, made of steel grade E235 in the normalized condition. pickled, to be delivered in standard lengths of 6 m with an 3.1 inspection certificate in accordance with EN 10204.
12000 m tubes —40 x 1.5— EN 10305-3 — E235+N, S2 —6 m standard length — Option 20
7 Manufacturing process
7.1 Steelmaking process
The steelmaking process is at the discretion of the manufacturer with the exception that the open hearth (Siemens-Martin) process shall not be employed unless In combination with a secondary steelmaking or ladle refining process.
Steels shal be fully killed.
NOTE Thés excludes the use of rvnnhelg, balanced or seml.kllled steel.
7.2 Tube manufacture and delivery conditions
7.2.1 The tubes shall be manufactured from strip by electric welding. The tubes shall not contain stnp end welds except for tubes to be supplied coiled for which the delivery conditions +A or +N may be specified.
Poss4ble surface conditions are:
a) SI (black);
b) S2 (pickled);
C) S3 (cold rolled);
d) S4 (coated to an agreed condition).
NOTE The surface conditions SI and S3 apply for the strip. The surface condition S2 and S4 mey ply for the strip or the tube; the purchaser should, whee necessary, indicate the required condition at the time of enquiry and orde.
7.2.2 Tubes made of the steel grades E155. E195. E235. E275 and E355 shall be supplied in the delivery condition +CR1 or +A or +N (see Table 1). Tubes made of the grades E190. E220, E260. E320, E370 and E420 shall be supplied in die delivery condition +CR2.
7.2.3 All non-destructive testing (NDT) activities shall be carried out by Qualified and competent level 1. 2 and/or 3 personnel authonzed to operate by the employer.
The qualification shall be in accordance with EN 10256 or, at least, an eqwvalent to it.
It Is recommended that the level 3 personnel be certified In accordance with EN 473 or. at least, an equivalent
The operating authorization issued by the employer shall be in accordance with a written procedure. NDT operations shall be authorized by a level 3 NDT individual approved by the employer.
Normally, the finish and surface condition shall be such that any surface imperfections requinng dressing can be identified. Any surface imperfections, wti.ch m accordance with the manufacturers experience might be considered defects as specified in 8.4.5, shall be dressed in accordance with 8,4,6, or the tube or part of tube shall be rejected.
8.4.2 The external weld bead shall be removed flush with the surface. The height of the Internal weld Is not limited, unless option 4 is specriied.
OptIon 4: The height of the internal weld bead shalt not exceed a specified value or be removed, The wall thickness in the weld area shall not be lower than the specified minimum wall thickness.
8.4.3 Outside the weld area, the roughness on the outside surface shall be: Ru  4 .im.
8.4.4 Verification of surface roughness and/or improved levels oF roughness may be specified (see options 5 arid 6).
Option 5: The surface roughness shall be measured in accordance with 11.5 and reported.
OptIon 6: A specific surface roughness of agreed type and linwting value is specified. The roughness shall be measured and reported.
8.4.5 Surface imperfections wi,ich encroach on the specified minimum wall thickness shall be considered defects and tubes containing these shall be deemed not to conform to this document
8.4.6 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 wall thickness All dressed areas shall blend smoothly into the contour of the tube.
8.4.7 Tubes wi the delivery condition +A or .N shall be free of loose scale but may show discoloration.
8.4.8 Verification of internal soundness by non-destructive testing may be specified by the purchaser (see options 7 to 9).
Option 7: Non-destructive testing of the weld seam for the detect,or, of longitudinal imperfections shall be carried out in accordance with 11.7.1 is specified.
Option 8: Non-oestructive testing of the full tube circumference for the detection of longitudinal imperfections shall be camed out in accordance with 11.7.1 is specified.
Option 9: Non-destructive testing for verification of leak tightness shall be carried out in accordance with 11. 7.2
Strip end welds on tubes to be supplied coiled shall be subjected to an additional testing. The testing method Is left to the discretion of the manufacturer, unless option 10 Is specified.
Option 10: A testing procedure (with agreed type of test and acceptance criteria) for the detection of imperfections in transverse welds is specified.
8.5 Dimensions and tolerances.