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BS EN ISO 23856:2021

BS EN ISO 23856:2021

$215.11

Plastics piping systems for pressure and non-pressure water supply, drainage or sewerage. Glass-reinforced thermosetting plastics (GRP) systems based on unsaturated polyester (UP) resin

Published By Publication Date Number of Pages
BSI 2021 72
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This document specifies the properties of piping system components made from glass-reinforced thermosetting plastics (GRP) based on unsaturated polyester resin (UP). It is suited for all types of water supply, drainage and sewerage with or without pressure. Types of water supply include, but are not limited to, raw water, irrigation, cooling water, potable water, salt water, sea water, penstocks in power plants, processing plants and other water-based applications. This document is applicable to GRP UP piping systems, with flexible or rigid joints with or without end thrust load-bearing capability, primarily intended for use in direct buried installations.

PDF Catalog

PDF Pages PDF Title
2 National foreword
4 European foreword
8 Foreword
9 Introduction
11 1 Scope
2 Normative references
13 3 Terms and definitions
14 3.5 Joint movement
17 3.12 Pressure
19 3.15 Ring deflection
20 3.16 Resistance to strain corrosion
21 3.17 Ring stiffness
22 4 General
4.1 Classification
4.1.1 Categories
4.1.2 Nominal size
23 4.1.3 Nominal stiffness
4.1.4 Nominal pressure
24 4.2 Materials
4.2.1 General
4.2.2 Reinforcement
4.2.3 Resin
4.2.4 Aggregates and fillers
4.2.5 Thermoplastics liners
4.2.6 Elastomers
25 4.2.7 Metals
4.3 Wall construction
4.3.1 Inner layer
4.3.2 Structural layer
4.3.3 Outer layer
4.4 Appearance
4.5 Reference conditions for testing
4.5.1 Temperature
26 4.5.2 Properties of water for testing
4.5.3 Loading conditions
4.5.4 Conditioning
4.5.5 Measurement of dimensions
4.6 Elapsed time, x , for determination of long-term properties
4.7 Joints
4.7.1 General
4.7.2 Types of joint
4.7.3 Flexibility of the joint
27 4.7.4 Sealing ring
4.7.5 Adhesives
4.8 Effect on water quality
4.9 Assessment of conformity
28 5 Pipes
5.1 Type of pipes
5.2 Geometrical characteristics
5.2.1 Diameter
33 5.2.2 Wall thickness
5.2.3 Length
34 5.3 Mechanical characteristics
5.3.1 Initial ring stiffness
5.3.2 Long-term creep ring stiffness
35 5.3.3 Initial resistance to failure in a deflected condition
37 5.3.4 Ultimate long-term resistance to failure in a deflected condition
38 5.3.5 Initial longitudinal tensile strength
40 5.3.6 Initial design and failure pressures for pressure pipes
42 5.3.7 Long-term failure pressure
5.4 Resistance to chemical attack
5.4.1 General
43 5.4.2 Procedure using failure points
44 5.4.3 Procedure using specified levels of strain
45 5.4.4 Test piece length
5.4.5 Test solution
5.5 Marking
46 6 Fittings
6.1 All types
6.1.1 General
6.1.2 Diameter series
6.1.3 Nominal pressure (PN)
6.1.4 Nominal stiffness (SN)
6.1.5 Fitting type
6.1.6 Mechanical characteristics of fittings
47 6.1.7 Installed leaktightness of fittings
6.1.8 Dimensions
6.2 Bends
6.2.1 Classification of bends
48 6.2.2 Dimensions and tolerances of bends
51 6.3 Branches
6.3.1 Classification of branches
6.3.2 Dimensions and tolerances of branches
54 6.4 Reducers
6.4.1 Classification of reducers
6.4.2 Dimensions and tolerances of reducers
56 6.5 Non-pressure saddles
6.5.1 Classification of saddles
57 6.5.2 Dimensions of saddles and associated tolerances
6.6 Flanges
6.6.1 Classification of flanges
58 6.6.2 Dimensions and tolerances for adaptors
59 6.7 Marking
60 7 Joints
7.1 General
7.1.1 Interchangeability
7.1.2 Requirements
61 7.1.3 Test temperature
7.1.4 Non-pressure joints
7.1.5 Dimensions
7.2 Flexible joints
7.2.1 General
7.2.2 Maximum allowable draw
7.2.3 Maximum allowable angular deflection
7.2.4 Flexible non-end-load-bearing joints with elastomeric sealing rings
62 7.2.5 Flexible end-load-bearing joints with elastomeric sealing rings
7.3 Rigid joints
7.3.1 Wrapped or cemented
63 7.3.2 Bolted flange joints
64 7.4 Marking
65 Annex A (normative) Principles used to establish the design requirements based on regression testing and consideration of the variability of the product
70 Bibliography

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BS EN ISO 23856:2021
$215.11