BS/EN 10217-4-2019 pdf download.Welded steel tubes for pressure purposes – Technical delivery conditions
Part 4: Electric welded non-alloy steel tubes with specified low temperature properties.
10.2.2.1 General
Samples and test pieces shall be taken at the tube ends and in accordance with the requirements of
EN ISO 377.
10.2.2.2 Test pieces for tensile tests on the tube body
The test piece for the tensile test at room temperature shall be prepared in accordance with the requirements of EN ISO 6892-1.
At the manufacturer’s discretion:
— for tubes with an outside diameter D< 219,1 mm, the test piece shall be either a full tube section or a strip section and shall be taken in a direction longitudinal to the axis of the tube;
— for tubes with an outside diameter D 219,1 mm the test piece shall either a machined test piece with circular cross section from an un-flattened sample or a strip section and be taken in a direction either longitudinal or transverse to the axis of the tube.
Except when a full tube section is used, the test piece shall be taken diametrically opposite the weld. 10.2.2.3 Test pieces for tensile tests on the weld
The test piece 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; any remnant of the internal weld bead may he removed.
10.2.2.4 Test piece for the flattening test, ring tensile test, drift expanding test, ring expanding test
The test piece for the flattening test, ring tensile test, drift expanding test, ring expanding test shall consist of a full tube section in accordance with EN ISO 8492, EN ISO 8496, EN ISO 8493 or EN ISO 8495 respectively.
10.2.2.5 Test pieces for impact tests on the tube body
Three standard Charpy V-notch test pieces shall be prepared in accordance with EN ISO 148-1. Unless
otherwise specified (see below), the test pieces shall be taken transverse to the tube axis.
The test pieces shall be taken diametrically opposite the weld.
If the tube specified wall thickness is such that standard width test pieces cannot be produced without flattening of the section, then test pieces of standard width less than 10mm, but not less than 5 mm shall be prepared; the largest obtainable standard width, either 7,5 mm or 5 mm, shall be used.
For guidance, transverse test pieces shall be taken unless Dm as calculated by the following formula, is greater than the specified tube outside diameter, in which cases longitudinal test pieces shall be used.
Option 13: The test method Is specified by the purchaser.
11.12.2 Tubes of test category 2 shall be tested in accordance with one of the following:
— EN ISO 10893-3 to acceptance level F2;
— EN ISO 10893-10 for longitudinal imperfections to acceptance level U2 sub-category C.
Regions at the tube ends not automatically tested shall either be subjected to manual/semi-automatic ultrasonic testing in accordance with EN ISO 10893-10:2011, Annex B or shall be cropped off.
Unless Option 14 is specified, the selection of test method is at the discretion of the manufacturer. Option 14: The test method is specf led by the purchaser.
11.12.3 When Option 5 (see 8.4.3.2) is specified, tubes of test category 2 shall also be subjected to ultrasonic testing for the detection of transverse imperfections in accordance with EN ISO 10893-10 to acceptance level U2. sub-category C.
11.12.4 When Option 6 (see 8.4.3.2) is specified, tubes of test category 2 shall also be subjected to ultrasonic testing for the detection of the laminar imperfections in accordance with EN ISO 10893-8 to acceptance level
U2.
11.13 Retests, sorting and reprocessing
For retest, sorting and reprocessing the requirements of EN 10021 shall apply.
12 Marking
12.1 Marking to be applied
At least one end of each tube shall be indelibly marked by a suitable and durable method, such as an automated ink or paint marking process, paint stencil or hard stamping (using low stress or pin stamps) or a combination of these.
The marking shall include the following information:
— the manufacturer’s name or trade mark or product brand;
— the type of tube (HFW);
— the number of this European Standard, e.g. EN 102 17-4;
— the steel name or steel number (see 5.2.1 and 5.2.2).BS/EN 10217-4-2019 pdf download.
BS/EN 10217-4-2019 pdf download
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