BS ISO 4898:2018 pdf download

BS ISO 4898:2018 pdf download.Rigid cellular plastics – Thermal insulation products for buildings – Specifications
1 Scope
This document specifies requirements and methods of testing for three categories of rigid cellular plastics thermal-insulation products for buildings. It covers rigid cellular plastics in the form of flat or profiled boards, with or without natural skins. They can also be faced or laminated with foil, plastic or metal films or sheets, mineral coatings, paper, cardboard or other materials. This document is not applicable to materials used for the thermal insulation of pipes and vessels, for impact sound absorption or for acoustical insulation.The limiting quality values in this document are for use only in the specification of materials between purchaser and supplier, and are not intended to be used for design purposes. Additional requirements for special applications can be added to those specified in this document by agreement between purchaser and supplier.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 291, Plastics — Standard atmospheres for conditioning and testing
ISO 844, Rigid cellular plastics — Determination of compression properties
ISO 845, Cellular plastics and rubbers — Determination of apparent density
ISO 1040, Building construction — Modular coordination — Multimodules for horizontal coordinating dimensions
ISO 1209-1, Rigid cellular plastics — Determination of flexural properties — Part 1: Basic bending test
ISO 1663, Rigid cellular plastics — Determination of water vapour transmission properties
ISO 1923, Cellular plastics and rubbers — Determination of linear dimensions
ISO 2796, Cellular plastics, rigid — Test for dimensional stability
ISO 2896, Rigid cellular plastics — Determination of water absorption
ISO 7616, Cellular plastics, rigid — Determination of compressive creep under specified load and temperature conditions
5 Physical-property requirements
5.1 Categories
Physical-property requirements are organized into product categories to meet purchaser and supplier needs over a range of end-use applications. Category I — Suitable for non-load-bearing applications such as wall and cavity insulation, vented roofs, cavity wall insulation and similar applications. Category II — Suitable for limited load-bearing applications such as in built-up roofs, under floors and comparable applications, where elevated temperatures may be encountered and where compressive creep resistance is required. Products in this category may also be used for applications listed in category I. Category III — Suitable for load-bearing applications such as in parking decks, floors of cold-storage areas and comparable applications requiring a higher level of compressive strength and compressive creep resistance. Products in this category may also be used for applications listed in categories I and II.