Anchored joint reliability
Self-anchoring solutions fully tried and tested
PAM self-anchoring systems are designed and tested in strict compliance with the quality assurance procedures specified by standard ISO 9001-2000 and based on the standards applicable to ductile iron pipelines including, in particular, standards EN 545 and ISO 10804-1, as well as PAM's specific internal specifications.
These tests are conducted in a COFRAC approved laboratory and various combinations of mechanical conditions are applied in order to reproduce all the installation conditions (not only average conditions). For the design of new products, PAM goes further than the requirements specified in applicable standards :
- Each diameter (DN) is individually tested (rather than just one diameter for each product range).
- The durability of joints is assessed by internal pressure testing at 80°C for six months.
Thanks to this strict approach, PAM is able to provide its customers with selfanchoring solutions of outstanding reliability.
The self-anchoring devices are submitted, specifically, to four essential tests prescribed by European standard EN 545 and international standard ISO 10804-1.
| Method | Condition | Pressure | Why ? |
|---|---|---|---|
| Positive internal pressure | Maximum deflection Shearing force 50 DN | 1.5 PFA+5 bar | To check joint's ability to withstand the hydraulic thrust |
| Negative internal pressure | Maximum deflection Shearing force 50 DN | -0.9 bar | To check joint's air tightness |
| Cyclic internal pressure | Shearing force 50 DN | 24000 cycles PMA-5->PMA | To check joint's fatigue behaviour |
| Positive external pressure | Maximum deflection Shearing force 50 DN | 2 bar | To check joint's resistance to penetration of ground water |
Test methods
| Test methods for resistance to positive, negative and cyclic internal pressure | Test methods for resistance to external pressure |
|---|---|
 |  |
M = weight of pipe
W = vertical force
F = shearing force resulting from application of M and W