BS ISO 18225:2012
$142.49
Plastics piping systems. Multilayer piping systems for outdoor gas installations. Specifications for systems
| Published By | Publication Date | Number of Pages |
| BSI | 2012 | 28 |
This International Standard specifies general and performance requirements for multilayer pipe systems based on pipes made from thermoplastics and intended to be used for gas supply outdoors.
It gives requirements for the design of pipe systems consisting of multilayer pipes based on thermoplastics and for which at least 60 % of the wall thickness is of a polymeric material. The polymeric material used for stress design layers and all inner layers must be polyethylene (PE) and/or crosslinked polyethylene (PE-X), in accordance with Annex A. The outer layers of metal multilayer pipes must be of either PE or PE-X.
NOTE For the purposes of this International Standard, PE-RT is considered as PE, while PE-X and adhesive layers are considered as thermoplastics materials.
This International Standard is applicable to systems intended to be operated at temperatures ranging from −20 °C to 40 °C. It is applicable to pipes in these systems having a nominal diameter up to and including 630 mm, and to the supply of gaseous fuels of categories D (natural gas) and E (LPG vapour and natural gas or LPG vapour) (see ISO 13623).
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 6 | Foreword |
| 7 | Introduction |
| 9 | 1 Scope 2 Normative references |
| 10 | 3 Terms and definitions 3.1 Structural definitions |
| 11 | 3.2 Geometrical definitions |
| 12 | 3.3 Definitions related to pressure 3.4 Materials definitions 3.5 Definitions related to material characteristics |
| 13 | 3.6 Terms related to service conditions 4 Pipes 4.1 Material |
| 14 | 4.2 General characteristics 4.3 Dimensions of pipes |
| 15 | Table tab_1 |
| 16 | Table tab_2 4.4 Mechanical properties |
| 18 | Table tab_3 Table tab_4 4.5 Physical properties |
| 19 | Table tab_5 5 Fittings 5.1 Fittings reference standards 5.2 Materials 5.3 Dimensions 5.4 Elastomeric seals 6 Fitness for purpose of the system |
| 20 | Table tab_6 7 Marking and documentation 7.1 Legibility 7.2 Damage 7.3 Minimum marking requirements |
| 22 | Table tab_A.1 Annex A (normative) List of reference product standards |
| 23 | Annex B (normative) Testing resistance to gas constituents |
| 24 | Table tab_C.1 Annex C (normative) Testing resistance to weathering of outer layer of M-pipes |
| 25 | Reference ref_1 Reference ref_2 Reference ref_3 Reference ref_4 Reference ref_5 Reference ref_6 Reference ref_7 Reference ref_8 Reference ref_9 Reference ref_10 Reference ref_11 Bibliography |
