Anchored joint reliability

Technical solutions

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.

MethodConditionPressureWhy ?
Positive internal pressureMaximum deflection
Shearing force 50 DN
1.5 PFA+5 barTo check joint's ability to withstand the hydraulic thrust
Negative internal pressureMaximum deflection
Shearing force 50 DN
-0.9 barTo check joint's air tightness
Cyclic internal pressureShearing force 50 DN24000 cycles 
To check joint's fatigue behaviour
Positive external pressureMaximum deflection
Shearing force 50 DN
2 barTo check joint's resistance to penetration of ground water


Test methods

Test methods for resistance to positive, negative and cyclic internal pressureTest methods for resistance to external pressure
internal pressure testsexternal pressure tests


M = weight of pipe
W = vertical force
F = shearing force resulting from application of M and W