SIST EN ISO 4490:2018 PDF

Metallic powders - Determination of flow rate by means of a calibrated funnel (Hall flowmeter) (ISO 4490:2018)

Название (английский):

SIST EN ISO 4490:2018

Metallic powders - Determination of flow rate by means of a calibrated funnel (Hall flowmeter) (ISO 4490:2018)

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 14
Дата публикации:: 15 июня 2018 г.
Издание:: ISO 4490:2018
ICS:: 77.160

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Описание (английский):

ISO 4490:2018 specifies a method for determining the flow rate of metallic powders, including powders for hard metals, by means of a calibrated funnel (Hall flowmeter). The method is applicable only to powders which flow freely through the specified test orifice.

Технические детали

Технический комитет: I13 - Imaginarni 13
SKU: SIST EN ISO 4490:2018

Abstract

Overview

EN ISO 4490:2018 (ISO 4490:2018) specifies a standardized test method for measuring the flow rate of metallic powders using a calibrated funnel, commonly called the Hall flowmeter. The method quantifies how long it takes for a 50 g test portion of a freely flowing metallic powder (including powders for hard metals) to pass through a standardized orifice. It applies only to powders that flow freely through the specified test orifice.

Key Topics and Requirements

Principle: Measurement of elapsed time for 50 g of powder to flow through a calibrated funnel (reported as seconds per 50 g).
Apparatus:
- Calibrated funnel (Hall flowmeter) of standardized dimensions made from non‑magnetic, corrosion‑resistant metal with adequate hardness and wall thickness.
- Rigid stand with a vibration‑free base.
- Balance with accuracy of ±0.05 g.
- Timing device with accuracy of ±0.1 s.
- Reference grit (reference powder) for funnel calibration.
Calibration:
- Manufacturer supplies a calibrated funnel. Reference grit is dried at 110 °C for 60 min, cooled in a desiccator, and five determinations are made on 50 g until five values fall within 0.4 s. The average (nominally 40.0 s ± 0.5 s/50 g) is stamped on the funnel.
- Users should periodically verify calibration. If reference flow deviates, a correction factor (40.0 ÷ measured value) may be applied; investigate cause (wear or coating). Discontinue use if reference flow

Overview

Key Topics and Requirements

Principle: Measurement of elapsed time for 50 g of powder to flow through a calibrated funnel (reported as seconds per 50 g).
Apparatus:
- Calibrated funnel (Hall flowmeter) of standardized dimensions made from non‑magnetic, corrosion‑resistant metal with adequate hardness and wall thickness.
- Rigid stand with a vibration‑free base.
- Balance with accuracy of ±0.05 g.
- Timing device with accuracy of ±0.1 s.
- Reference grit (reference powder) for funnel calibration.
Calibration:
- Manufacturer supplies a calibrated funnel. Reference grit is dried at 110 °C for 60 min, cooled in a desiccator, and five determinations are made on 50 g until five values fall within 0.4 s. The average (nominally 40.0 s ± 0.5 s/50 g) is stamped on the funnel.
- Users should periodically verify calibration. If reference flow deviates, a correction factor (40.0 ÷ measured value) may be applied; investigate cause (wear or coating). Discontinue use if reference flow

SIST EN ISO 4490:2018 PDF

Технические детали

Abstract

Overview

Key Topics and Requirements

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Abstract

Overview

Key Topics and Requirements

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