7 Mechanical characteristics
7.1 Mechanical characteristics of pipes
7.1.1 General requirements
When tested in accordance with the test method as specified in table 16, using the indicated parameters, the pipe shall have mechanical characteristics conforming to one of the requirements given in table 16.
7.1.3 Mechanical characteristics of fittings
For application area BD the fittings shall have mechanical characteristics conforming to the
requirements as specified in EN 1401-1:1998 for fittings of SDR 41 or SDR 34, as applicable.
When a fitting conforming to this standard has the same wall thickness as the corresponding pipe, the stiffness of this fitting because of its geometry, is equal to or greater than the stiffness of that pipe.
Consequently fittings are classified with the corresponding pipe stiffness.
8 Physical characteristics
8.1 Physical characteristics of pipes
When tested in accordance with the test method as specified in table 19 using the indicated parameters, the pipe shall have physical characteristics conforming to the requirements given in table 19.
8.2 Physical characteristics of fittings
When tested in accordance with the test method as specified in table 20 using the indicated parameters, the fitting shall have physical characteristics conforming to the requirements given in table 20.
9 Performance requirements
When tested in accordance with the test method as specified in table 21 using the indicated parameters, the joints and the system shall have characteristics conforming to the requirements given in table 21.
10 Requirements for application area code D
Pipes and fittings for application area D shall conform to the following requirements in addition to those
necessary for application area B alone.
– Material: for material for pipes and fittings used for application D, the requirements for resistance to internal pressure (long-term behaviour) are as specified in table 22 or table 23, as applicable.
– Stiffness: the pipe and fitting shall have a nominal stiffness of not less than SN 4 in conformance with EN 1401-1:1998.
– Combined tightness test: when tested in accordance with EN 1277:1996, the joints shall conform to table 21.
Summary of Testing Equipment
- Dimensional measurement equipment for pipes and fittings
- Vicat Softening Point EN 727
- Resistance to Dichloromethane EN 580
- MFI MFR Melt Flow Indexer ISO 1133
- DSC OIT Differential Scanning Calorimeter EN728
- Falling Weight Impact Tester EN 744
- Longitudinal Reversion (Hot Air Oven) EN 743
- Water Tightness Tester EN 1053
- Air Tightness Tester EN 1054
- Thermal Cycling tester EN 1055
- ISO Ring Stiffness Tester ISO 9969
- Hydrostatic Pressure Tester EN 921
- Hot Water Bath for Hydrostatic Pressure Tester EN 921
- SS304 End Caps
- Combinational Test for Seals EN 1277