Rörledningskomponenter och rörledningar

ISO 3994:2014 specifies the requirements for three types of helical-thermoplastic-reinforced thermoplastics hoses for suction and discharge of water, weak aqueous chemical solutions and abrasive solids and slurries, for use in the ambient temperature range from −10 °C to 55 °C. The three types of hose are for light-, medium- and heavy-duty applications.

 This document specifies requirements and test methods for pipes and fittings which are part of piping systems for the rehabilitation by means of renovation and trenchless replacement of underground gas supply networks. It is applicable to polyethylene (PE) pipes, fittings and assemblies, as manufactured and as installed. It is not applicable to the existing pipeline. It is applicable to technique families for renovation:

— lining with continuous pipes;

— lining with close-fit pipes; and technique families for trenchless replacement:

— pipe bursting and pipe extraction;

— horizontal directional drilling and impact moling. and intended to be used at an operating temperature of 20 °C as the reference temperature.

NOTE Annex A. For applications operating at constant temperatures greater than 20 °C and up to 40 °C, see ISO 4437-5:2024,

This document is applicable to:

— PE solid wall single layered pipes (nominal outside diameter, dn), including any identification stripes;

— PE pipes with co-extruded layers on either or both the outside and inside of the pipe (total outside diameter, dn), as specified in Annex D, where all layers have the same MRS rating.

Furthermore, when used with lining with continuous pipes and trenchless replacement this document is applicable to:

— PE coated pipes (outside diameter, dn) having a peelable, contiguous, thermoplastics additional layer on the outside of the pipe (“coated pipe”), as specified in Annex D. When used with lining with close-fit lining pipes, the lining pipe is reduced in the factory or on site to provide a close-fitting independent or interactive pressure pipe liner.

This document is applicable to jointing by means of butt fusion and electrofusion and to fabricated and injection-moulded fittings and mechanical connections of PE.

This document is not applicable to push-fit jointed discrete pipes assembled as part of the trenchless installation process.

 ISO 2507 specifies a general method for determining the Vicat softening temperature (VST) of thermoplastics pipes and fittings.

It includes the adaption of method B 50 of ISO 306: 2022 using a force of 50 N and a heating rate of 50 °C/h. It includes the particular test conditions for determining the Vicat softening temperature (VST) of unplasticized poly(vinylchloride) (PVC-U) or chlorinated poly(vinylchloride) (PVC-C) pipes and fittings, for high impact resistance poly(vinylchloride) (PVC-HI) pipes and for acrylonitrile/butadiene/styrene (ABS) and acrylonitrile/styrene/acrylic ester (ASA) pipes and fittings.

It also gives, for information, the corresponding base specifications.

It is not applicable to crystalline or semi-crystalline polymers.

This document specifies the steps of the overall process of pipeline rehabilitation, comprising: — information on strategic and tactical activities: a) investigation and condition assessment of the existing pipeline; b) pipeline rehabilitation planning. — information on and requirements for operational activities: c) project specification; d) applications of techniques; e) documentation of the design and application process. Definitions and classification of families of renovation and trenchless replacement techniques are provided, and their respective features described. Areas of application covered include underground drainage and sewerage networks and underground water and gas supply networks. The following aspects are not covered by the scope of this document: — new construction provided as network extensions; — calculation methods to determine, for each viable technique, the characteristics of lining or replacement pipe material needed to secure the desired performance of the rehabilitated pipeline; — techniques providing non-structural pressure pipe liners; — techniques for local repair. It is the responsibility of the designer to choose and design the renovation or trenchless replacement pipeline system.

This document specifies the definitions and requirements for solid-wall pipes with or without internal skin and smooth internal and external surfaces extruded from the same compound throughout the wall, fittings and the system of polyethylene (PE) piping systems to be intended for use in non-pressure underground drains and sewers for foul wastewater.

NOTE 1 Products complying with this document can also be used in non-pressure underground drains and sewers for surface water.

This document is applicable to:

a) non-pressure drains and sewers, which are intended to be used buried underground outside the building structure; reflected in the marking of products by “U”;

b) non-pressure drains and sewers, which are intended to be used buried underground both outside (application area code “U”) and within the building structure, reflected in the marking of products by “UD”.

This document specifies test methods referred to in this document and test parameters.

This document is applicable to pipes and fittings with or without an integral socket.

This document covers a range of pipe and fitting sizes, stiffness classes, tolerance classes and gives recommendations concerning colours.

NOTE 2 It is the responsibility of the purchaser or specifier to make the appropriate selections from these aspects, taking into account their particular requirements and any relevant national regulations and installation practices or codes.

In conjunction with CEN/TS 12666-2 [1] it is applicable to PE pipes and fittings, their joints and to joints with components of other plastics and non-plastics materials intended to be used for buried piping systems for non-pressure drains an sewers.

The fittings can be manufactured by injection moulding or can be fabricated from pipes and/or mouldings.

This document is applicable to PE pipes and fittings for the following types of joints:

— elastomeric ring seal joints;

— butt fused joints;

— electrofusion joints;

— mechanical joints.

NOTE 3 Pipes, fittings and other components conforming to any of the plastics product standards listed in the Annex D (informative) can be used with pipes and fittings conforming to this document, provided they conform to the requirements for joint dimensions given in Clause 7 and to the requirements of Clause 7 and Table 13.