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BS EN 14525:2022

BS EN 14525:2022

$167.15

Ductile iron and steel wide tolerance couplings and flange adaptors for use with pipes of different materials: ductile iron, Grey iron, steel, PVC-U, PVC-O, PE, fibre-cement

Published By Publication Date Number of Pages
BSI 2022 38
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This document specifies the requirements and associated test methods applicable to wide tolerance ductile iron and steel (restricted sizes for steel) couplings, stepped/reducing couplings and flange adaptors intended for use with pipe components made from a number of pipe materials (ductile iron, grey iron, PE in conformity with EN 12201-1 to EN 12201-5, PVC-U in conformity with EN ISO 1452-1 to EN ISO 1452-5, PVC-O in conformity with EN 17176-1 to EN 17176-5, steel, fibre-cement), for providing a leak tight seal over a wide range of pipe outside diameters: – to convey water (e.g. water intended for human consumption); – with or without pressure; – to be installed below or above ground, inside or outside buildings. This document is not intended to cover sewerage or gas applications, where additional requirements may be necessary. This document specifies requirements for materials, dimensions and tolerances, mechanical properties and standard coatings of products. This document covers wide tolerance couplings, stepped/reducing couplings and flange adaptors: – manufactured with socketed or flanged ends; – supplied externally and internally coated; – suitable for pipes made from ductile iron in conformity with EN 545, grey iron, PE in conformity with EN 12201-1 to EN 12201-5, PVC-U in conformity with EN ISO 1452-1 to EN ISO 1452-5, PVC-O in conformity with EN 17176-1 tot EN 17176-5, steel, fibre-cement in a size range extending from DN 40 to DN 800, for an allowable operating pressure (PFA) up to 16 bar, for fluid temperatures between 0 °C and 25 °C excluding frost. For higher temperatures, (up to 45 °C for PVC-U and PVC-O or 40 °C for PE) the PFA is derated as given in EN ISO 1452 and EN 12201; – not intended for use in areas subjected to reaction to fire regulations. NOTE 1 This does not preclude special arrangements for the products to be used at higher temperatures. Temperature limitations and pressure limitations are those coming from the PVC-U, PVC-O or PE pipes. This document covers ductile iron couplings, stepped/reducing couplings and flange adaptors cast by any type of foundry process or manufactured by fabrication of cast components, as well as corresponding joints, in a size range extending from DN 40 to DN 800. As long as no equivalent European Standard exists for steel accessories, this document also covers couplings and flange adaptors which are fabricated partly or entirely from steel as well as corresponding joints, in a size range extending from DN 600 to DN 800. This document specifies requirements for materials, dimensions and tolerances, mechanical properties and standard coatings. It also gives minimum performance requirements for all components, including restrained and non-restrained flexible joints. Joint design and gasket shapes are outside the scope of this document. NOTE 2 PFA can be limited depending on pipe materials effectively connected. NOTE 3 In this document, if not specified, all pressures are relative gauge pressures, expressed in bars (100 kPa = 1 bar).

PDF Catalog

PDF Pages PDF Title
2 undefined
7 1 Scope
8 2 Normative references
3 Terms and definitions
12 4 Technical requirements
4.1 General
4.1.1 Diameter range
4.1.2 Surface condition and repairs
13 4.1.3 Types of joints and interconnection
4.1.3.1 General
4.1.3.2 Flexible joints
4.1.3.3 Flanged joints
4.1.4 Materials in contact with water intended for human consumption
14 4.2 Dimensional requirements
4.2.1 Minimum wall thickness of ductile iron couplings and flange adaptors
4.2.2 Minimum wall thickness of steel couplings and flange adaptors
15 4.2.3 Joint gap and depth of engagement
16 4.2.4 Angular deflection
4.3 Material characteristics
4.3.1 Ductile iron
4.3.1.1 Tensile properties
4.3.1.2 Hardness
4.3.2 Mild steel for couplings and flange adaptors (DN600 to DN800 only)
17 4.3.3 Fastener for couplings and flange adaptors
4.4 Coatings
4.5 Product information
4.5.1 Marking requirements
18 4.5.2 Additional information
4.6 Water tightness
4.6.1 Couplings and flange adaptors
4.6.2 Joints
5 Performance requirements for joints
5.1 General
19 5.2 Pressure rating
5.3 Water tightness of flexible joints
5.3.1 General – performance tests principles
5.3.2 Test conditions
5.3.2.1 General
5.3.2.2 Water tightness over OD range – Annulus (R tests in Table 5)
20 5.3.2.3 Water tightness on various pipe materials (D or C or P Tests in Table 6)
5.3.2.4 Shear load
5.4 Restrained flexible joints
23 5.5 Long term hydrostatic strength test
5.5.1 PE pipes
5.5.2 Pull out test at 25 °C for PE restrained joints
24 5.5.3 PVC pipes
5.6 Flanged joints
6 Test methods
6.1 Tensile testing
6.1.1 Samples
25 6.1.2 Preparation of test bar
6.1.3 Apparatus and test method
6.1.4 Test results
26 6.2 Brinell hardness
6.3 Routine water tightness test
6.3.1 General
6.3.2 Air test
6.3.3 Hydrostatic pressure test
7 Performance tests
7.1 Positive internal pressure joint water tightness
7.1.1 Coupling
27 7.1.2 Flange adaptor
28 7.2 Negative internal pressure joint
7.3 Dynamic internal pressure joint water tightness
29 7.4 Long term hydrostatic strength test for joints for PE pipes
7.4.1 Test piece
7.4.2 Test procedure
7.5 Pull out test at 25 °C for restrained joints for PE pipes
7.5.1 Test assembly
7.5.2 Apparatus
7.5.3 Test procedure
30 7.6 Long term hydrostatic strength test for joints of fittings for PVC pipe
7.6.1 Test piece
7.6.2 Test procedure
31 Annex A (informative)Outside diameters of existing pipes
34 Annex B (informative)Quality assurance
B.1 General
B.2 Performance test
35 B.3 Manufacturing process
B.3.1 Quality Control
B.3.2 Tensile strength
B.3.3 Routine test

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BS EN 14525:2022
$167.15