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BS EN ISO 9202:2019 pdf free

BS EN ISO 9202:2019 pdf free.Jewellery and precious metals -Fineness of precious metal alloys. 1 Scope This document specifies a range of fineness of precious metal alloys (excluding solders) recommended for use in the field of jewellery. NOTE， There is a possibility that national legal requirements for the designation, marking, and stamping of finished articles exist in the respective countries....

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BS EN ISO 307:2019 pdf free

BS EN ISO 307:2019 pdf free.Plastics - Polyamides - Determination of viscosity number. Transfer 50 ml of m-cresol (5.1.3) into a weighing flask (6.4) and add with a glass pipette (6.5) 0,14 ml of orthophosphoric acid (5.1.Z). Close the flask and stir with a magnetic stirrer for 30 min at 100 °C. Add the solution to approximately 800 ml of...

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BS EN 12407:2019 pdf free

BS EN 12407:2019 pdf free.Natural stone test methods -Petrographic examination. A macroscopic description of the sample is undertaken at first. The macroscopic description may involve a visual inspection aided by a hand lens or a stereoscopic microscope. Then one or more thin sections prepared from the sample are examined using an optical polarized transmitted light microscope in order to give...

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BS EN 3645-010:2019 pdf free

BS EN 3645-010:2019 pdf free.Aerospace series - Connectors, electrical, circular, scoop-proof, triple start threaded coupling, operating temperature 175 °C or 200 °C continuous. 1 Scope This European Standard specifes the characteristics of hermetic receptacles with jam nut mounting in the family of circular, electrical connectors, with triple start threaded coupling. It applies to models in Table 3. For plugs and...

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BS EN 17298:2019 pdf free

BS EN 17298:2019 pdf free.Animal feeding stuffs一Methods of sampling and analysis一Determination of benzoic and sorbic acid by High Performance Liquid Chromatography (HPLC). The sample is extracted with a mixture of sodium acetate buffer and methanol. The extract is filtered or centrifuged and - if necessary - diluted. The amount of organic acids extracted from the sample is determined with high-performance...

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BS EN IEC 60974-5:2019 pdf free

BS EN IEC 60974-5:2019 pdf free.Arc welding equipment. The WIRE FEEDER motor shall be loaded to provide a current corresponding to the MAXIMUM LOAD in accordance with 11.7 for all tests. WIRE FEEDERS designed for use with manual torches shall be capable of operating at rated welding current at 60 % duty cycle (6 min "on" and 4 min "off")...

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BS ISO 1656:2019 pdf free

BS ISO 1656:2019 pdf free.Rubber; raw natural, and rubber latex, natural - Determination of nitrogen content. A known mass of the sample is digested with a mixture of sulfuric acid and catalytic amount converting nitrogen compounds into ammonium hydrogen sulfate from which the ammonia is distilled after making the mixture alkaline. The distilled ammonia is absorbed either in standard volumetric...

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BS ISO 21194:2019 pdf free

BS ISO 21194:2019 pdf free.Elastic adhesives一Testing of adhesively bonded joints - Bead peel test. 4 Principle Adhesive beads are applied onto substrates. These are then peeled off again after curing and a possible subsequent climate resistance test. If an ageing is performed, the individual steps shall progress in succession with the test specimen, whereby a partial area is peeled off...

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BS EN 2638:2019 pdf free

BS EN 2638:2019 pdf free.Aerospace series-Aluminium alloy 2024-T3 - Extruded bar and section- 1,2 mm≤(a orD)≤ 1 50 mm with coarse peripheral grain control. 1 Scope This document specifies the requirements relating to: Aluminium alloy 2024-T3 Extruded bar and section 1,2 mm (a or D) 150 mm with coarse peripheral grain control for aerospace applications. 2 Normative references The following...

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BS EN 893:2019 pdf free

BS EN 893:2019 pdf free.Mountaineering equipment一Crampons一Safety requirements and test methods. Measure the slippage of the crampon on the ice when the force F has been applied for at least 1 mm. Then apply the minimum force Fin the backward direction and measure the slippage of the crampon on the ice when the force F has been applied for at least...

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