ISO INTERNATIONAL STANDARD 1146 First edition 1988-02-01 INTERNATIONAL ORGANIZATION FOR STANDARDIZATION ORGANISATION INTERNATIONALE DE NORMALISATION Pyrometric reference cones for laboratory use Specification Cones pyroscopiques de reference pour emploi en laboratoire-Spécifications Reference number ISO 1146:1988 (E) Not for Resale Foreword ISo (the International Organization for Standardization) is a worldwide federation of national standards bodies (sO member bodies). The work of preparing International Standards is normally carried out through IsO technical committees. Each 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 part in the work. Draft International Standards adopted by the technical committees are circulated to the member bodies for approval before their acceptance as International Standards by the Iso Council. They are approved in accordance with IsO procedures requiring at International Standard ISO 1146 was prepared by Technical Committee ISO/TC 33, Refractories. It cancels and replaces ISo Recommendation R 1146 : 1969, of which it constitutes a technical revision. and that any reference made herein to any other International Standard implies its latestedition,unlessotherwisestated InternationalOrganizationforStandardization,1988 Printed in Switzerland Copyright Intermational Organization for Standardization Not for Resale ISO 1146 : 1988 (E) INTERNATIONAL STANDARD Pyrometric reference cones for laboratory use Specification 1 Scope and field of application 3.1 pyrometric reference cone: A blunt-tipped skew triangular pyramid with sharp edges, of specified shape and dimensions and of such composition that, when mounted and 1.1 This International Standard specifies the characteristics heated under specified conditions,it bends inaknown manner of a standard series of pyrometric reference cones, which are with referenceto the temperature (see 3.2). used for determining the pyrometric cone equivalent (refrac- toriness) of refractory materials, over the temperature range 1:500 to 1 800 °C. 3.2 reference temperature; temperature of collapse: The temperature at which the tip of a pyrometric reference cone reaches the level on which the base of the cone is 1.2 Thepyrometric reference cones specified inthis Interna mounted when the cone is heated at a specified rate under tional Standard are suitable for use in the procedure described specified conditions. in IS0 528, excluding determinations at 1 500 and 1 800 oC. 4Dimensions and shape of cones 2 Reference 4.1 The nominal dimensions of a cone shall be as shown in ISo528,Refractoryproducts Determination of pyrometric figure 1. coneequivalent(refractoriness). 4.2The shape of a cone shall be as indicated in figures 2 or 3. 3 Definitions 4.3 A cone may lean in the direction of an edge, as in figure 2, or in the direction of a face, as in figure 3. The angle to For the purpose of this International Standard, the following the vertical to be made by the leading edge or face when the definitions apply. cone is mounted, shall be 8 ± 1°. Base h=30mm b = 8,5 mm Figure 1 Figure 2 Figure 3 1 Copyright Intemational Organization for Standardization Not for Resale