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1 INTERNATIONAL STANDARD ISO 2531 Sixth edition Ductile iron pipes, fittings, accessories and their joints for water applications Tuyaux, raccords et accessoires en fonte ductile et leurs assemblages pour l'eau Reference number ISO 2531:2009(E) ISO 2009
4 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. 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, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 2531 was prepared by Technical Committee ISO/TC 5, Ferrous metal pipes and metallic fittings, Subcommittee SC 2, Cast iron pipes, fittings and their joints. This sixth edition cancels and replaces the fifth edition (ISO 2531:1998), of which it constitutes a technical revision. A new classification system for pipes and fittings based on pressure is introduced with minimum wall thickness determined by allowable operating pressure. iv ISO 2009 All rights reserved
5 INTERNATIONAL STANDARD ISO 2531:2009(E) Ductile iron pipes, fittings, accessories and their joints for water applications 1 Scope This International Standard specifies the requirements and test methods applicable to ductile iron pipes, fittings, accessories and their joints for the construction of pipelines: to convey water (e.g. for human consumption and raw water), operated with or without pressure, and installed below or above ground. NOTE In this International Standard, all pressures are relative pressures expressed in bar 1). This International Standard specifies materials, dimensions and tolerances, mechanical properties and standard coatings of pipes, fittings and accessories. It also gives performance requirements for all components including joints. This International Standard applies to pipes, fittings and accessories cast by any type of foundry process or manufactured by fabrication of cast components, as well as corresponding joints in the size range DN 40 to DN 2600 inclusive. It is applicable to pipes, fittings and accessories which are manufactured with socketed, flanged or spigot ends (joint design and gasket shapes are outside the scope of this International Standard), normally delivered internally and externally coated. Pipes and fittings are classified according to allowable operating pressure. 2 Normative references The following referenced documents are indispensable for the application 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 4016, Hexagon head bolts Product grade C ISO 4034, Hexagon nuts Product grade C ISO 4633, Rubber seals Joint rings for water supply, drainage and sewerage pipelines Specification for materials ISO , Metallic materials Brinell hardness test - Part 1: Test method ISO , Metallic flanges Part 2: Cast iron flanges 1) 100 kpa = 1 bar ISO 2009 All rights reserved 1
17 4.5 Coatings and linings for fittings and accessories Fittings and accessories shall normally be delivered internally and externally coated External coatings Ductile iron pipeline systems can be installed in a wide range of external operating environments. These environments can be characterized by their aggressivity. For relevant factors, see A.1. Coatings specified by relevant International Standards are available as specified in A.3. Other coatings are also available Internal linings Ductile iron pipeline systems can be used to convey a wide range of raw waters and potable waters. These internal environments can be characterized according to their aggressivity. Relevant factors to be considered for cement mortar linings without seal coats are given in B.1. Linings specified by relevant International Standards are available as specified in B.3. Other linings are also available. 4.6 Marking All pipes and fittings shall be durably and legibly marked and shall bear at least the following indications: a) a reference to this International Standard, i.e. ISO 2531; b) the manufacturer s name or mark; c) identification of the year of manufacture; d) identification as ductile iron; e) the DN; f) the PN rating of flanges, if applicable; g) the C pressure class of socket and spigot pipe. Items b) to f) shall be cast-on or cold stamped. Items a) and g) can be applied by any method, e.g. painted on the castings. 5 Leaktightness requirements 5.1 Pipes and fittings Pipes and fittings shall be designed to be leaktight at their allowable site test pressure (PEA). They shall be tested according to 6.5 and shall exhibit no visible leakage, sweating or any other sign of failure. 5.2 Flexible joints General All flexible joints for ductile iron pipes and components shall be designed in compliance with the requirements of 5.2. If the design has been tested and documented by the manufacturer and successfully used for a minimum of 10 years, the performance of a type test as specified in for internal pressure, as specified ISO 2009 All rights reserved 13
Industrial cellular router ICR-2531 is designed for wireless communication in the mobile networks that make use of traditional cellular technologies. The primary purpose of this router is its use in the Category 4 (Cat.4) services on the cellular LTE network. The peak downlink data rate for a Category 4 is approximately 150 Mbps. Also in the uplink, LTE Category 4 provides a peak data rate of 50 Mbps.The router is equipped with four Ethernet ports while three are switched and one is separated. Both 3× ETH0 and 1× ETH1 ports may be independently configurable as LAN or WAN interfaces. The router supports VPN tunnel creation using various protocols to ensure safe communications. The router provides diagnostic functions which include automatic monitoring of the wireless and wired connections, automatic restart in case of connection losses, and a hardware watchdog that monitors the router status.With an open Linux platform and wide possibilities of programming customer SW applications in Python, C/C++. The Advantech existing app library Router Apps (User modules) with apps already developed to enhance specific router functionality including industrial protocol conversions and support of IoT platforms such as MS Azure, Cumulocity, ThingWorx, and others are supported on the router.
ISO 2531:2009 specifies the requirements and test methods applicable to ductile iron pipes, fittings, accessories and their joints for the construction of pipelines:- to convey water (e.g. for human consumption and raw water),- operated with or without pressure, and- installed below or above ground.It specifies materials, dimensions and tolerances, mechanical properties and standard coatings of pipes, fittings and accessories. It also gives performance requirements for all components including joints.ISO 2531:2009 applies to pipes, fittings and accessories cast by any type of foundry process or manufactured by fabrication of cast components, as well as corresponding joints in the size range DN 40 to DN 2600 inclusive. 2b1af7f3a8