Marquage tuyau fonte NATURAL Saint-Gobain PAM

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BLUTOP joints

Technical solutions

BLUTOP joint

Joint performance determines the reliability of the pipelines during the following operations:
– Jointing
– Pressurizing
– During
– The product’s life cycle,
– All conditions of use

PAM has combined all its design skill and know-how, together with that of the very finest gasket manufacturers, in order to create the BLUTOP joint.

One of BLUTOP’s major advantages is the pipeline anchoring system, which eliminates the need for heavy concrete thrust blocks.
The technology developed and patented by PAM has greatly enhanced the competitiveness of its anchoring systems.

Channelling the jointing force

The BLUTOP joint has been specially designed in order to guarantee:

  • Easy laying with a lower force requirement to allow for jointing using a crowbar
  • Safe laying thanks to a mechanism to prevent the gasket from becoming loose during assembly
  • Support points along the fittings make for easy jointing along the correct axis plane

This unique design, which has been perfected in close collaboration with several installers, allows for faster laying without causing additional tiredness and fatigue.

High performance levels

The full use of PAM technologies has made it possible to create high performance BLUTOP joints.

DN/ODClasse

PFA

 

PMA

 

PEA 

 

75 to 160C25253035

 

Angular deflection

DN/ODTolerated deviation during installation (°)Shiftling (cm)
75 to 16062

²

The BLUTOP joint withstands an angular deflection of 6°.

Study of the full range of pressure options

During their useful lifetime, water distribution pipelines are subjected to numerous types of pressure. This naturally includes standard service pressure, but also the following:
- Day / night time pressure cycles
- Water hammer
- Pressure drops
- External pressure from the earth, groundwater
- Period without pressure prior to commencement of operations

In each of these situations, the joints are subjected to specific types of stress. For this reason, all joints for ductile iron pipelines are designed and tested in accordance with strict methods:
- In accordance with EN 545 testing: 4 tests
- PAM’s own specific testing consisting of 4 additional tests

In addition, PAM carefully studies all its new joints using scientific finite element calculus methods similar to those used in the aeronautical and car industries.
These design methods and tests guarantee unbeatable durability and reliability.

Tests

MethodConditionsPressureObjectiveRéférentiel
Positive internal pressureMaximum deviation
Shear force
30 DN
1.2 PFA+5barTo prove the joint’s
capacity to withstand the
hydraulic pressure
EN 545
Negative internal pressureMaximum deviation
Shear force
30 DN
-0.9 barTo prove that the joint is
airtight
EN 545
Cyclic internal pressureShear force
30 DN
24000 cycles
PMA-5 ->PMA
To prove the joint’s fatigue
performance
EN 545
Positive external pressureMaximum deviation
Shear force
30 DN
2 barTo prove that the joint is
resistant to groundwater
EN 545
Positive internal pressureMaximum deviation
Shear force
30 DN
Set up using seal bush
at 1.5 PFA+5 bar
To prove joint performance
at all pressure levels
PAM
AgeingWater at 80°C3 months of cycles
PMA-5 ->PMA
To prove the joint’s ageing
performance PAM
PAM
Fine sand infestationFine sand heavily
compacted around the joint
prior to pressurizing
First three
EN 545 tests
To prove the resistance to
sand entering the joint
PAM
Silt infestationCompaction of silt around
the joint prior to
pressurizing
First three
EN 545 tests
To prove the resistance to
mud and silt under the
gasket
PAM

 

Videos diaporama

Assemblage des tuyaux BLUTOP®
PamlineTV
1 / 1
Logo de la gamme Blutop