ISO/TC 5/SC 2 - Cast iron pipes, fittings and their joints

This document provides details about the aggressiveness factors, evaluation indicators of raw water, or inlet water of ductile iron pipe system and relevant lining information applicable to ductile iron pipes, fittings and accessories used in water mains and distribution system. This document is intended to serve as a tool for estimating the properties of certain water and their effect on internal linings of ductile iron pipes, fittings and accessories used in water mains and distribution system which are specified in ISO 2531, ISO 16631 and can be used to decide the most appropriate protective measures to ensure long term durability of pipeline. It is not always possible to definitively determine the aggressive parameters of certain water, and fully considered by limited test and evaluation. Therefore, the history information of the evaluated water, experiences of local water works can be taken for reference. The aggressiveness evaluation of water can be carried out before determining the internal lining materials of certain pipeline, and the evaluation and relevant tests can be done by qualified laboratories and engineers. Water that leads to high-level scaling in the pipeline is believed aggressive. Drainage and waste water are not in the scope of this document, the internal protection of drainage and waste water can be recommended by pipe suppliers.

This document specifies the design factor, technical requirements, test methods, installation technologies and operation advices applicable to ductile iron pipes, fittings and accessories used in piped irrigation applications. NOTE In this document, all pressures are relative pressures expressed in bars. This document also 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. Joint design and gasket shapes are outside the scope of this document. This document applies to pipes, fittings and accessories cast by any type of foundry process or manufactured by fabrication of cast components.

This document specifies a computation method used to determine the length of the ductile iron pipes to be restrained, when used for conveying raw water, drinking water, sewerage under pressure. This computation method takes into account all common pipeline route changes, including changes in the diameter of the pipeline itself and dead ends at the extremity of the pipeline, the outside diameter of the pipe, the system test pressure (to estimate the thrust), depth of cover, the characteristics of the soil surrounding the pipe and trench backfilling methods for a worldwide usage. The characteristics of the restrained joint are not covered by this document but can also be considered to determine the restraining length using any appropriate method. The computation method defined in this document is applicable to all types of restrained joint systems, with their operating pressure ratings of ductile iron pipelines complying with ISO 2531, ISO 7186 and ISO 16631. NOTE 1 ISO 10804 deals with actual design of the joint for various operating pressures of the pipeline. NOTE 2 National standards or established calculation methods can be used instead of this ISO standard.

This document specifies the recommended practices and requirements for the installation of buried and above-ground ductile iron pipeline system conforming to ISO 2531, ISO 7186 and ISO 16631. The recommended practices in this document are intended to provide the practical advices based on the best methods of construction and installation of ductile iron pipeline system including pipes, fittings, valves and accessories.

This document specifies site hydrostatic acceptance tests for installed pressure and non-pressure ductile iron pipelines used for conveying water and other liquids. It does not cover testing of pipelines for gas. NOTE In this document, all pressures are relative pressures expressed in bars, where 1 bar = 0,1 MPa.

This document specifies the characteristics of polyethylene film, commonly called polyethylene sleeving, used as additional protection against corrosion for ductile iron pipelines, particularly when laid in aggressive soil conditions. This film, the efficiency of which has been proved by experience, takes the form of a sheet or tube fitted around the pipes and fittings, on-site, immediately before pipe-laying.

This document specifies the design of earthquake-resistant and subsidence-resistant ductile iron pipelines suitable for use in areas where seismic activity and land subsidence can be expected. It provides a means of determining and checking the resistance of buried pipelines and gives example calculations. It is applicable to ductile iron pipes and fittings with joints as specified in ISO 2531, ISO 7186 and ISO 16631 that have expansion/contraction and deflection capabilities, used in pipelines buried underground. NOTE Subsidence is not the effects of an earthquake or a sinkhole.

This document specifies the evaluation method of life cycle analysis of ductile iron pipes used for water applications as specified in ISO 2531 and ISO 16631. Studies on economic and environmental impacts are important for utility decision-makers as they seek to balance budget concerns over immediate and long-term needs across acquisition, operations and maintenance, and planned end of life. For authorities and engineers designing pipeline systems, the life cycle cost analysis serves as a tool to study various scenarios to determine the right solution for site-specific conditions and community values, as well as to provide the necessary data to support those decisions. Informative annexes are included in this document as a compilation of reference and consensual factors (pumping cost, leakage incident rate, etc.).

ISO 10804:2018 specifies the design rules and type testing for restrained joint systems to be used on ductile iron pipelines complying with ISO 2531 and ISO 7186, in order to determine their mechanical properties and leaktightness.

ISO 8179-1:2017 specifies an external protective coating system which is factory applied to ductile iron pipeline components as specified in ISO 2531, ISO 7186 and ISO 16631. This coating system comprises an electro-deposited metallic zinc-based coating of - pure metallic zinc with a purity of 99,99 %, - zinc and aluminium alloy with or without other metals, or - other zinc alloys followed by a finishing layer that can be bituminous paint or synthetic resin compatible with zinc-based coating. NOTE ISO 8179-2 deals with zinc-rich paint coating.

ISO 8179-2:2017 specifies an external protective coating system which is factory-applied to ductile iron pipeline components as specified in ISO 2531, ISO 7186 and ISO 16631. This coating system comprises a zinc-rich paint followed by a finishing layer that can be bituminous paint or synthetic resin compatible with zinc rich paint coating. NOTE ISO 8179-1 addresses metallic zinc-based coatings.

ISO 18468:2017 specifies the requirements and test methods applicable to factory applied epoxy coatings (fusion bonded or 2-pack liquid epoxy) for ductile iron fittings and accessories supplied to ISO 2531 and ISO 7186, and ductile iron valves. It covers internal and external coatings for use in the conveyance of raw water, potable water and waste waters for operating temperatures up to 60 °C. ISO 18468:2017 contains specifications for performance tests and routine tests of the coating.

ISO 9349:2017 specifies the requirements and test methods applicable to preinsulated ductile iron pipes, fittings, accessories and their joints for the construction of pipelines (or parts thereof): - to convey water (e.g. potable water), wastewater and other liquids; - to be operated with or without pressure; - to be installed below or above ground; - to limit temperature variations of the conveyed fluids. These pipelines are mainly used to prevent the water to be conveyed from freezing by providing external insulation. NOTE 1 In this document, all pressures are relative pressures expressed in bars[1]). ISO 9349:2017 gives, in addition to the specifications of the existing International Standards for the conveying ductile iron pipes and fittings, specifications for materials, dimensions and tolerances, mechanical and thermal properties of the thermal insulation layer and external casing of preinsulated ductile iron pipes, fittings and accessories. ISO 9349:2017 covers preinsulated ductile iron pipes, fittings and accessories of a size range extending from DN 60 to DN 600 inclusive, which are as follows: - manufactured with socketed, flanged or spigot ends for jointing by means of various types of gaskets which are not within the scope of this document; - preinsulated in the works (excluding on site application of the insulation layer and/or the casing); - normally delivered internally and externally coated; - intended for fluid temperatures from 0 °C to 50 °C, excluding frost. NOTE 2 Other applications are possible by agreement between manufacturer and purchaser. [1]) 100 kPa = 1 bar.

ISO 16132:2016 specifies the requirements for seal coatings for factory application to the surfaces of cement mortar linings, which are factory applied to the interior of ductile iron pipes and fittings. It provides the performance requirements for short-term sealing efficiency, long-term durability and cyclic pressure, as well as the routine testing requirements for visual appearance, coating thickness and adhesion. ISO 16132:2016 is applicable to products for potable and other water applications.

ISO 16631:2016 specifies the requirements and test methods applicable to ductile iron pipes, fittings, accessories and their joints with dimensions compatible with plastic (PVC or PE) piping systems: - to replace or repair existing plastic pipelines; - to convey water (e.g. for human consumption, raw water, etc.); - operated with or without pressure; - installed below or above ground; - defined according to their external diameter (DN/OD series); - classified according to pressure (C class). The pressure class specified in this International Standard is C25. This pressure resistance level will meet or exceed those of plastic pipes. These ductile iron pipes, fittings, accessories and joints can be used along with plastic pipelines, where they are needed (for example, with higher pressure rating sections, higher traffic load, etc.), for the construction of water pipelines. The dimensions of the products according to this International Standard, in the size range DN/OD 50 to DN/OD 225, are compatible with those of plastic pipes (ISO 1452‑2 for PVC and ISO 4427‑2 for PE). The spigots of plastic pipes used for water applications can be inserted into sockets of pipes manufactured according to this International Standard. The spigots and sockets of products defined in this International Standard are not dimensionally compatible with the products defined in ISO 2531. ISO 16631:2016 gives specifications for materials, dimensions and tolerances, mechanical properties and standard coatings and linings of pipes, fittings and accessories. It also gives performance requirements for all components including joints. ISO 16631:2016 covers 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/OD 50 to DN/OD 225 inclusive. ISO 16631:2016 is applicable to pipes, fittings and accessories which are - manufactured with socketed or spigot ends for jointing by means of various types of gaskets (which are not within the scope of this International Standard), and - compulsory delivered internally and externally coated. ISO 16631:2016 is also applicable to socketed fittings which include flanged connections. NOTE In this International Standard, all pressures are relative pressures expressed in bar[1]. [1] 100 kPa = 1 bar.

1 Scope This International Standard specifies the requirements, test methods and installation technologies applicable to ductile iron pipes used in trenchless applications: — to convey water or wastewater; — operated with or without pressure. NOTE In this International Standard, all pressures are relative pressures expressed in bar(s)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. Joint design and gasket shapes are outside the scope of this International Standard. 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, of a size range DN 80 to DN 2 600 inclusive.

ISO 10803:2011 specifies the design of ductile iron pipes used for conveying water, sewerage and other fluids, with or without internal pressure and with or without earth and traffic loading.

ISO 7186:2011 specifies the requirements and test methods applicable to ductile iron pipes, fittings, accessories and their joints for the construction of drains and sewers outside buildings: - to convey surface water (e.g. rainwater), domestic waste water and/or certain types of industrial effluents, either in separate systems or in combined systems; - operating without pressure (gravity sewers) or with positive or negative pressure; - for installation below or above ground. ISO 7186:2011 contains specifications for 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 7186:2011 is applicable 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 80 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 shape are outside the scope of ISO 7186:2011) and normally delivered internally and externally coated.

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.

ISO 6594:2006 specifies the characteristics of cast iron drainage pipes and fittings used for the installation of discharge pipes for waste and sewage, rain water pipe systems, and ventilation pipe systems. The technical specification is applicable to the range of nominal sizes, DN: 40 - 50 - 70 - 75 - 100 - 125 - 150 - 200 - 250 - 300 - 400 - 500 - 600. In addition, ISO 6594:2006 gives the dimensions for the most commonly used pipe and fitting sizes. It also provides control testing and test methods for checking compliance with the technical specification and the dimensional and other requirements.

ISO 4179:2005 specifies the nature, the method of application, the surface condition and the minimum thickness of internal linings of cement mortar for ductile iron pipes and fittings for pressure and non-pressure pipelines as defined in ISO 2531 and ISO 7186. ISO 4179:2005 covers cement mortar linings which are used to improve the hydraulic properties of pipes and fittings compared to un-lined pipes and fittings and/or to prevent corrosion damage and includes special requirements for linings of gravity sewers operating partially filled. ISO 4179:2005 also covers linings used for the conveyance of particularly aggressive fluids, where the following solutions may be used either separately or in combination: a) an increase in the thickness of the lining; b) a change of the type of cement; c) a coating over the lining.

ISO 10804:2010 specifies the design rules and type testing for restrained joint systems to be used on ductile iron pipelines complying with ISO 2531 and ISO 7186, in order to determine their mechanical properties and leak tightness.

ISO 8180:2006 specifies the characteristics of polyethylene film, commonly called sleeving, used as additional protection against corrosion for ductile iron pipelines, particularly when laid in aggressive soil conditions. This film, the efficiency of which has been proved by experience, takes the form of a sheet or tube fitted around the pipes and fittings, on-site, immediately before pipe-laying.

ISO 16134:2006 specifies the design of earthquake- and subsidence-resistant ductile iron pipelines suitable for use in areas where seismic activity and land subsidence can be expected. It provides a means of determining and checking the resistance of buried pipelines and also gives example calculations. It is applicable to ductile iron pipes and fittings with joints that have expansion/contraction and deflection capabilities, used in pipelines buried underground.

ISO 16132:2004 specifies the requirements for seal coatings for factory application to the surfaces of cement mortar linings, which are factory applied to the interior of ductile iron pipes and fittings. It also gives performance test requirements for short term sealing efficiency and long term durability and requirements for routine testing for visual appearance, coating thickness and adhesion. ISO 16132:2004 is applicable to products for potable and other water applications.

ISO 9349:2004 specifies the requirements and test methods applicable to preinsulated ductile iron pipes, fittings, accessories and their joints for the construction of pipelines (or parts thereof) to convey water (e.g. potable water), wastewater and other liquids, to be operated with or without pressure, to be installed below or above ground, to limit temperature variations of the conveyed fluids. ISO 9349:2004 gives, in addition to the specifications of the existing ISO standards for the conveying ductile iron pipes and fittings, specifications for materials, dimensions and tolerances, mechanical and thermal properties of the thermal insulation layer and external casing of preinsulated ductile iron pipes, fittings and accessories. ISO 9349:2004 covers preinsulated ductile iron pipes, fittings and accessories of a size range extending from DN 60 to DN 600 inclusive, which are manufactured with socketed, flanged or spigot ends for jointing by means of various types of gaskets which are not within the scope of this International Standard; preinsulated in the works (excluding on-site application of the insulation layer and/or the casing); normally delivered internally and externally coated; intended for fluid temperatures from 0 °C to 50 °C, excluding frost.

ISO 8179-1:2004 deals with an external protective coating system which is factory applied to centrifugally cast ductile iron pipes as specified in ISO 2531 and ISO 7186. This coating system comprises a metallic zinc layer followed by a finishing layer.

Requirements and test methods applicable to ductile iron pipes, fittings, accessories and their joints for the construction of drains and sewers outside buildings.

Specifies design rules und type testing for joint systems to be used on ductile iron pipelines complying with ISO 2531 and ISO 7186, in order to determine their mechanical properties and leaktightness.

Deals with a factory-applied protective external coating system for centrifugally cast ductile iron pipes. This coating system comprises a zinc rich paint with inorganic binder followed by a finishing layer. This edition replaces ISO 8179, which has been technically revised.

Deals with a factory-applied protective external coating system for centrifugally cast ductile iron pipes. This coating system comprises a metallic zinc layer followed by a bituminous paint as finishing layer. This edition replaces ISO 8179, which has been technically revised.

Lays down the material specifications of solid vulcanized rubber sealing rings and specifies requirements for their effect on the organoleptic properties (colour, taste and odour) and the total organic carbon content of water. In the case of composite seals (which comprise, e.g. both rigid and flexible rubbers), applies only to the requirement for their effect on the total organic carbon content of water.

Specifies site hydrostatic acceptance tests for installed pressure and non-pressure pipelines used for conveying water and other liquids. Does not cover testing of pipelines for gas.

Specifies requirements and test methods for buried and above-ground pipeline systems. Includes terms and definitions. Annexes A, B, C and D form an integral part of this standard.

This second edition cancels and replaces the first edition (1980). Specifies the nature, the method of application, the surface condition and the minimum thickness of internal linings for pipes as defined in ISO 2531 and ISO 7186. Tabulates nominal sizes from DN 40 up to and including DN 2600.

Specifies the characteristics of polyethylene film, commonly called sleeving and used as additional protection against corrosion of pipelines particularly when laid in aggressive soil conditions. This film takes the form of a sheet or tube and is fitted around the pipes on site immediately before pipe laying.

Comprises three sections: technical specification, dimensions and masses, control testing and test methods. Several figures illustrate the fittings. The range of nominal sizes is as follows: 50 - 70 - 75 - 100 - 125 - 150 - 200 - 250 - 300.

Specifies a certain number of methods used for controls of mortar linings complying with requirements of ISO 4179 and applied csntrifugally on the inner surface of pipes intended for transporting water under pressure as defined in ISO 2531. Describes the drying method and the xylol method.

Specifies the properties of the pipes, special castings and parts manufactured by any one of the following processes: centrifugal casting in metal or sand moulds; vertical casting in sand moulds. Applies to products with sockets, spigots or flanges defined by this standard. It does not apply to the down pipes and their specials used in the building industry.