BS EN 10217-4 pdf free download

BS EN 10217-4-2019 pdf free download.Welded steel tubes for pressure purposes – Technical delivery conditions Part 4: Electric welded non-alloy steel tubes with specified low temperature properties.
6 Information to be supplied by the purchaser
6.1 Mandatory information
The following information shall be supplied by the purchaser at the time 01 enquiry and order:
a) the quantity (mass. total length or number of tubes of set length);
b) the term ‘tube’ and tube type, HFW;
c) the dimensions (outside diameter D, wall thickness TJ (see Table 6);
d) the random length range (see 8.7.3);
e) for tubes with a D/T> 100, out of roundness limits (see 8.7.4.4).
f) the designation of the steel grade in accordance with this document (see 5.2);
g) the test category (see 9.3).
6.2 Options
A number of options are specified in this document and these are listed below. In the event that the purchaser does not indicate a wish to implement any of these options at the time of enquiry and order, the tubes shall be supplied in accordance with the basic specification (see 6.1).
1) Tube manufacturing route (see 7.2.2);
2) Restriction on copper and tin content (see Table 2);
3) Product analysis (see 8.2.2);
4) Selection of method for verification of leak-tightness (see 8.4.3.1);
5) Non-Destructive Testing of test category 2 tubes for the detection of transverse imperfections (see
8.4.3.2);
6) Non-Destructive Testing of test category 2 tubes for the detection of laminar imperfections (see
8.4.3.2);
7) Special end preparation (see 8.6);
8) Exact lengths (see 8.7.3);
9) Inspection document 3.2 in place of the standard 3.1 Inspection Certificate (see 9.2.1);
10) Verification of tensile strength of the weld in the transverse direction for tubes of outside diameter D> 219.1 mm (see Table 10);
11) Agreement of a different test pressure for hydrostatic leak-tightness test (see 11.9.1);
12) Wall thickness measurement away from the ends (see 11.10);
13) Selection of the Non-Destructive Testing method for the inspection of the weld seam of test category 1 tubes (see 11.12.1);
14) Selection of the Non-Destructive Testing method for the full peripheral inspection of test category
2 tubes (see 11.12.2);
15) Additional marking (see 12.2);
16) Protection (see Clause 13).
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 102 17-4. made of steel grade P265NL 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 10217-4 — P265NL- TC 1- 6m – Option 9: 3.2
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 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 The tubes shall be manufactured by an electric welding process employing high frequency welding (HFW), of minimum frequency 100 kHz in accordance with one of the manufacturing routes specified in Table 1.
Unless Option 1 is specified the manufacturing route is at the discretion of the manufacturer. Option 1: The manufacturing route from Table I is specified by the purchaser.
The finished tubes shall not include the welds used to join together the lengths of the strip prior to forming.
7.2.2 Tube production welding shall be carried out by suitably qualified personnel in accordance with documented procedures. For tubes intended for use in pressure equipment under European legislation, manufacturers shall employ an established procedure for the approval of welding operatives.
The production (welding) process for HFW tubes shall be qualified and approved under the tube manufacturer’s own QA system.
7.2.3 The delivery conditions of tubes covered by this document are shown in Table 1.BS EN 10217-4 pdf download.