ISO 15011-4:2017

ISO 15011-4:2017 pdf free.Health and safety in welding and allied processes—Laboratory method for sampling fume and gases—Fume data sheets.
4 Principle
4.1 Tests are carried out to determine the emission rate and chemical composition of welding fume produced when a welding consumable is used under a defined set of operating conditions. The welding fume is generated in accordance with the procedure described in ISO 15011-1 and under the conditions specified in this document.
4.2 Emission rate and chemical composition data are reported in a recommended format, and various ways in which the data may be used are described.
5 Procedure
5.1 Determine the fume emission rate and/or collect fume samples for analysis, as required, in accordance with the procedure described in ISO 15011-1. Carry out the tests under the conditions prescribed in 6.2, f and .fA as appropriate.
NOTE In practice, emission rates can vary significantly from those determined under the test conditions specified in 6.2, and 4 This is because the welding conditions used in the workplace can be significantly different from those specified in this document. The conditions specified are typical of common practice and have been standardized to generate comparative data for a welding fume consumable classification.
5.2 Analyse the welding fume samples to generate chemical composition data for all the principal components of the welding fume (see Table E1). Identify these, if necessary, by carrying out an initial qualitative analysis of the fume.
5.3 Estimate and report the uncertainty of measurements in accordance with the ISO GUM.[1] See Annex C for examples of performance data obtained in an interlaboratory comparison.
6 Test conditions
6.1 Generic test parameters
Table 1 lists the test parameters that apply to all the welding processes included in the scope of this document and it also gives cross-references for parameters that are process-specific.
Where it is specified in Tables 1 to f that a test condition is established by an experienced welder, if possible use the median of test conditions established by a number of experienced welders.
All instruments used for measuring test parameters shall have a calibration traceable to national standards.
The following lists the reasons for the test requirements in Table 1:
— Diameter: FER increases with consumable diameter because higher currents are used with larger diameter consumables and FER increases with current. Consequently, FER data should ideally be generated for all product diameters. However, the relationship between current and consumable diameter is linear for processes within the scope of this document, other than gas-shielded metal arc welding with solid wires. Hence, for these processes, it is permissible to generate FER data for the smallest and largest diameter consumables in the product range, and estimate the FER of other diameters by interpolation. For gas-shielded metal arc welding with solid wire welding, the relationship between diameter and FER is not linear and it is therefore necessary to generate FER data for all wire diameters of interest. Consumable diameter does not influence CC to any great extent, so it is sufficient to test one diameter only for CC measurements.
— Welding speed: The speed of welding does not significantly affect FER or CC. FER is increased at very low welding speeds, but these are outside the range of optimum working conditions. Hence, it is appropriate to carry out tests using an optimum welding speed, as established by an experienced welder.
— Test piece: Cost considerations support the use of commercial bar stock. The test piece can influence CC and possibly FER. From this, it is important to use a steel test piece for ferrous consumables and test pieces made of comparable materials for non-ferrous consumables.
— Power source: For gas-shielded metal arc welding, the welding machine type has a great influence on the FER. Pulse welding is not addressed by this document, but it is expected that this exhibits a lower FER than conventional welding and that the fume generated has a similar CC.
— Configuration: Bead-on-plate tests are recommended because they give a higher FER than fillet welding and therefore represent the worst-case scenario. A 900 torch angle is used for gas-shielded metal arc welding and self-shielded metal arc welding because FER is affected by the torch angle,and using this configuration avoids the need to specify whether the test should be carried out using
the push or pull technique. CC is not affected by the welding configuration.ISO 15011-4 pdf download.

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