EN 1237:1995

Fertilizers - Determination of bulk density (tapped) (ISO 5311:1992 modified)

This International Standard specifies a method for the determination of the bulkdensity (tapped) of solid fertilizers, except powder fertilizers. The method is not suitable for materials which contain more than 20 % by mass of particles exceeding 5 mm in diameter.

Düngemittel - Bestimmung der Rütteldichte (ISO 5311:1992 modifiziert)

Diese Internationale Norm legt ein Verfahren zur Bestimmung der Rütteldichte von festen Düngemitteln mit Ausnahme von pulverförmigen Düngemitteln fest. Das Verfahren ist für frei fließende Düngemittel anwendbar. Das Verfahren ist nicht anwendbar bei Materialien, welche einen Massenanteil von mehr als 20 %von Partikeln mit mehr als 5 mm Durchmesser enthalten.

Engrais - Détermination de la masse volumique après tassement (ISO 5311:1992 modifiée)

La présente Norme internationale prescrit une méthode de détermination de la masse volumique après tassement des engrais solides, à l'exclusion des engrais en poudre. La méthode est applicable aux engrais à écoulement fluide. Elle n'estpas applicable aux matériaux contenant plus de 20 % en masse de particules dépassant 5 mm de diamètre.

Gnojila - Določanje prostorninske gostote (s potresanjem) (ISO 5311:1992, modificiran)

General Information

• Status: Published
• Publication Date: 20-Jun-1995
• ICS: 65.080 - Fertilizers
• Technical Committee: CEN/TC 260 - Fertilizers and liming materials
• Drafting Committee: CEN/TC 260 - Fertilizers and liming materials
• Current Stage: 9093 - Decision to confirm - Review Enquiry
• Start Date: 05-Feb-2021
• Completion Date: 11-Feb-2026
• Ref Project: SIST EN 1237:1998 - Fertilizers - Determination of bulk density (tapped) (ISO 5311:1992 modified)

Overview

EN 1237:1995 (adopting ISO 5311:1992, modified) is a CEN standard that specifies procedures for determining the bulk density (tapped) of solid fertilizers (excluding powder fertilizers). The standard defines how to compact a known volume of fertilizer by tapping and calculate tapped bulk density as mass per unit volume (g/cm3). It is not suitable for materials that contain more than 20% by mass of particles larger than 5 mm in diameter. Two complementary methods are covered: a machine‑tapping method and a hand‑tapping method.

Key topics and technical requirements

• Scope and limits
  • Applies to dry solid fertilizers; powders and materials with excessive coarse particles (>5 mm, >20% by mass) are excluded.
  • Method 2 (hand tapping) is limited to spherical granules and prills, not sharp‑edged grains.
• Sample preparation
  • Test samples must be prepared according to ISO 7742 and ISO 8358 (sample reduction and preparation).
• Test methods
  • Method 1 - Machine tapping
    • Pour fertilizer through a funnel into a specified measuring cylinder, then tap using a tapping machine (specified camshaft frequency ~250 min‑1).
    • Typical procedure: controlled discharge time, use of a plastic collar, tap 2 500 times, remove surplus and weigh.
  • Method 2 - Hand tapping
    • Manual filling and tapping of the measuring cylinder (gentle taps during discharge, final drops/raises), scraping excess and weighing.
    • Specific procedural steps include discharge time control and light hand tapping (2–3 taps/s), with final 2 mm–3 mm lifts/drops.
• Measurement and expression
  • Bulk density (tapped) = mass of test portion (g) / volume of measuring cylinder (cm3).
  • Repeatability: difference between two successive determinations by the same operator should not exceed 0.01 g/cm3.
• Test report requirements
  • Include sample identification, method used, numerical result and units, any unusual observations and any deviations or optional operations.

Applications and users

• Useful for fertilizer manufacturers, QC/analytical laboratories, packaging and logistics planners, storage managers and regulators.
• Practical uses:
  • Designing packaging and storage capacity (silos, bags, bulk containers).
  • Calculating expected volume for bulk shipments and stock management.
  • Quality control to ensure consistent physical properties and handling behaviour.
  • Regulatory compliance and specification reporting.

Related standards

• ISO 5311:1992 (base international method) - referenced/modified
• ISO 3944:1992 - determination of bulk density (loose)
• ISO 7742:1988 - sample reduction for solid fertilizers
• ISO 8358:1991 - preparation of samples for analysis

Keywords: EN 1237:1995, ISO 5311:1992, bulk density tapped, fertilizer testing, tapped bulk density, fertilizer quality control, packaging design, storage density.

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.PRGLILFLUDQDüngemittel - Bestimmung der Rütteldichte (ISO 5311:1992 modifiziert)Engrais - Détermination de la masse volumique apres tassement (ISO 5311:1992 modifiée)Fertilizers - Determination of bulk density (tapped) (ISO 5311:1992 modified)65.080GnojilaFertilizersICS:Ta slovenski standard je istoveten z:EN 1237:1995SIST EN 1237:1998en01-maj-1998SIST EN 1237:1998SLOVENSKI
STANDARD
INTERNATIONAL STANDARD 5311 Third edition 1992-07-0 1 Fertilizers - Determination of bulk density @PP=9 Engrais - Determination de Ia masse volunkyue apr& tassemenf - -.-- -- ---___-_--_I__ _ ._-__. -_. _-_.----__ ___ Reference number ISO 5311:1992(E) SIST EN 1237:1998

ISO 5311:1992(E) Foreword ISO (the International Organization for Standardization) is a worldwide federation of national Standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Esch member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, govern- mental and non-governmental, in liaison with ISO, also take patt in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an inter- national Standard requires approval by at least 75 % of the member bodies casting a vote. International Standard ISO 5311 was prepared by Technical Committee ISO/TC 134, FerMizers and seil conditioners, Sub-Committee SC 3, Physical properties. This third edition cancels and replaces the second edition (ISO 5311:1983), which has been technically revised. 0 ISO 1992 All rights reserved. No part of this publication may be reproduced or utilized in any ferm or by any means, electronie or mechanical, including photocopying and microfilm, without Permission in writing from the publisher. International Organization for Standardization Case Postale 56 l CH-121 1 Genkve 20 l Switzerland Printed in Switzerland ii SIST EN 1237:1998

ISO 5311:1992(E) lntroduction The bulk densities (loose and tapped) of a fertilizer provide information relative to the required size of packaging materials, store-houses, stock-rooms, etc. Generally, the bulk density (tapped) is up to IO % greater than the bulk density (loose), and sometimes it may exceed this value. Both bulk densities depend on the actual density, surface form and particle size of the fertilizers. The bulk density (loose) tan be used to calculate the maximum volume of a given weight of fertilizer which may be expected in practice. The actual volume occupied by a given weight of fertilizer will normally be within the range calculated from the bulk density (loose) and the bulk density (tapped). SIST EN 1237:1998

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INTERNATIONAL STANDARD ISO 5311:1992(E) Fertilizers - Determination of bulk density (tapped) 1 Scope This International Standard specifies two methods for the determination of the bulk density (tapped) of solid fertilizers: - the machine-tapping method (method 1); - the hand-tapping method (method 2). These methods are applicable to dry fertilizers only. If the fertilizer has absorbed moisture during trans- port or storage, it is necessary to dry it in an en- vironmental chamber, with constant low humidity, Prior to the determination. Neither method is suitable for materials which con- tain a large proportion of particles exceeding 5 mm in diameter. Method 2 is applicable only to spherical granules and to prills. lt is not applicable to sharp-edged grains. NOTE 1 Because of the differentes in tapping tech- nique, the two methods will not necessarily give the same value for the bulk density (tapped). 2 Normative references The following Standards contain provisions which, through reference in this text, constitute provisions of this International Standard. At the time of publi- cation, the editions indicated were valid. All stan- dards are subject to revision, and Parties to agreements based on this International Standard are encouraged to investigate the possibility of ap- plying the most recent editions of the Standards in- dicated below. Members of IEC and ISO maintain registers of currently valid International Standards. ISO 3944:1992, Fertilizers - Determination of bulk density (loose). ISO 7742:1988, Solid fertilizers - Reduction of sam- ples. ISO 8358:1991, Solid fertilizers - Reparation of samples for chemical and physical analysis. 3 Definition For the purposes of this International Standard, the following definition applies. 3.1 bulk density (tapped) of a fertilizer: The mass
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