BS EN 10217-3 pdf free download

BS EN 10217-3 pdf free download. Welded steel tubes for pressure purposes – Technical delivery conditions.
6.3 Example of an order
500 m of HFW tube with an outside diameter of 168,3 mm, a wall thickness of 4,5 mm in accordance
with EN 10217-3, made of steel grade P355N, test category 1, in 6 m random lengths, with a 3.2
inspection certificate in accordance with EN 10204:
500 m – HFW -Tube – 168,3 x 4,5 – EN 102 17—3 — P355N -TC 1 – 6m – Option 12: 3.2
7 Manufacturing process
7.1 Steelmaking process
The steelmaking process is at the discretion of the steel or tube manufacturer with the exception that steel produced by the open hearth (Siemens-Martin) process shall not be employed unless in combination with a secondary steelmaking or ladle refining process.
Steels shall be fully killed and contain nitrogen binding elements, details of which shall be reported. NOTE This excludes the use of rimming, balanced or semi-killed steel.
7.2 Tube manufacture and delivery conditions
7.2.1 Tube manufacturing shall be as specified in Table 1.
Unless Option 1 is specified, the manufacturing process and route is at the discretion of the manufacturer.
Option 1: The manufacturing process and/or route from Table us specified by the purchaser.
Electric welded tubes shall be manufactured by a process employing high frequency welding (HFW), of minimum frequency 100 kHz.
The submerged arc weld of SAW tubes shall be made using at least one weld run on the inside and one weld run on the outside of the tube.
The strip used for the manufacture of SAWH tubes shall have a width of not less than 0,8 times or more than 3,0 times the outside diameter of the tube.
The finished tubes shall not include the welds used to join together the strip or plate prior to forming, except for SAWH tubes to test category 1, where this is permitted only when the welding procedure for the weld joining the strip or plate has been qualified in accordance with Annex A and has also been subjected to the same inspection and testing regime as the helical pipe welds and base material to test category 2 (see 11.12.2.3).
7.2.2 Tube production welding shall be carried out by qualified personnel in accordance with documented procedures. For tubes to be used in pressure equipment under European legislation, manufacturers shall employ an established procedure for the approval of welding operatives.
7.2.3 The welding procedure for SAW tubes shall be qualified in accordance with Annex A.
7.2.4 The production (welding) process for HFW tubes shall be qualified and approved under the tube manufacturer’s own QA system. Only HFW tubes (see 3.4) shall be supplied for pressure equipment under European legislation.
7.2.5 The delivery conditions for tubes covered by this document are shown in Table 1.
7.2.6 For grades P355N and P355NH full body normalizing may be replaced by normalizing rolling or by a hot (stretch) reduction process carried out within the normalizing temperature range.
7.3.3. It is recommended for the level 3 personnel to be suitably certified, either in accordance with EN ISO 9712 or, at least, an equivalent to it.
7.3.4 The operating authorization issued by the employer shall be in accordance with a written procedure.
7.3.5 All NDT operations shall be authorised by a level 3 NDT technician approved by the employer.
NOTE The definition of levels 1, 2 and 3 can be found in appropriate standards, e.g. EN ISO 9712 and
ISO 11484.
8 Requirements
8.1 General
The tubes shall conform to the requirements of this document when supplied in a delivery condition in accordance with Table 1 and inspected in accordance with the specified requirements in Table 15.
Tubes shall be suitable for hot and cold bending.
In addition, the general technical delivery requirements specified in EN 10021 shall apply.
8.2 Chemical composition
8.2.1 Cast analysis
The cast analysis reported by the steel producer shall apply and shall conform to the requirements ot Table 2.
When welding tubes produced in accordance with this document, account should be taken of the fact that the behaviour of the steel during and after welding is dependent not only on the steel analysis, but also on the welding process, including heat input, any applied heat treatment and the conditions of preparing for and carrying out the welding.BS EN 10217-3 pdf download.