BS ISO 9631:2018 pdf download

BS ISO 9631:2018 pdf download,Rubber seals — Joint rings for pipelines for hot-water supply up to 110 °C — Specification for the material
1 Scope
This document specifies material requirements for vulcanized rubber seals for hot drinking and non- drinking water supply (up to 110 °C). The different seal designations specified are defined according to seal type, seal application and the requirements for a particular seal (see Table 2). General requirements for finished joint seals are also given. Any additional requirements called for by the particular application are specified in the relevant product standards, taking into account that the performance of pipe joints is a function of the seal material properties, seal geometry and pipe joint design. This document is intended to be used where appropriate, in conjunction with product standards which specify performance requirements for joints. This document is applicable to joint seals for use with all pipeline materials, including metals, clay, fibre cement, concrete, reinforced concrete, plastics and glass-reinforced plastics. It is applicable to elastomeric components of composite and non-composite seals. In the case of composite seals made from materials with hardness ranging from 76 IRHD to 95 IRHD, the requirements for elongation at break, compression set and stress relaxation apply only when the material participates in the sealing function or contributes to the long-term stability of the seal. The material requirements specified in this document are designed for long term performances and a potential lifetime of 50 years. The lifetime of a sealing depends not only on material performance but also on other parameters which are not defined in this document like the mounting design, the quality of assembly and the combination with operating conditions. Joint rings made from cellular rubber materials are not covered by this document.
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 34-2, Rubber, vulcanized or thermoplastic — Determination of tear strength — Part 2: Small (Delft) test pieces
ISO 37, Rubber, vulcanized or thermoplastic — Determination of tensile stress-strain properties
ISO 48, Rubber, vulcanized or thermoplastic — Determination of hardness (hardness between 10 IRHD and 100 IRHD)
ISO 188:2011, Rubber, vulcanized or thermoplastic — Accelerated ageing and heat resistance tests
ISO 815-1, Rubber, vulcanized or thermoplastic — Determination of compression set — Part 1: At ambient or elevated temperatures
ISO 1431-1, Rubber, vulcanized or thermoplastic — Resistance to ozone cracking — Part 1: Static and dynamic strain testing
ISO 1629, Rubber and latices — Nomenclature
ISO 1817, Rubber, vulcanized or thermoplastic — Determination of the effect of liquids
ISO 3302-1, Rubber — Tolerances for products — Part 1: Dimensional tolerances
ISO 3384-1:2011, Rubber, vulcanized or thermoplastic — Determination of stress relaxation in compression — Part 1: Testing at constant temperature
ISO 6914:2013, Rubber, vulcanized or thermoplastic — Determination of ageing characteristics by measurement of stress relaxation in tension
ISO 9691:1992, Rubber — Recommendations for the workmanship of pipe joint rings — Description and classification of imperfections
ISO 10508:2006, Plastics piping systems for hot and cold water installations — Guidance for classification and design
ISO 15510, Stainless steels — Chemical composition
ISO 23529, Rubber — General procedures for preparing and conditioning test pieces for physical test methods