Telford foundry

PAMLOCK Joint

Joints

PAMLOCK joint

The PAMLOCK (Pk) joint is a STANDARD joint equipped with an anchoring system especially designed for large diameters. The novelty of the system lies in the use of shot particles,which hold the joint together without recourse to bolts.
The anchorage takes up the axial forces and allows concrete anchor blocks to be dispensed with.

Range : DN 1400 to 1800 (for 2000, please consult us.)

pamlock
Caption: 

Principle

The basic principle of joint anchoring consists of transferring the axial forces from one pipeline component to the next, thus rendering joint separation impossible.
Anchored joints allow the axial thrusts arising at particular points (bends, tapers, tees, blank flanges) to be distributed over one or more pipes, thus avoiding construction of concrete anchor blocks.

Description

The seal is provided by a STANDARD joint gasket.
The axial forces are transmitted by a mechanical arrangement, independent of the sealing function, comprising :
- a weld bead, applied at works,
- a locking ring, consisting of several segments held together by elastomer connectors,
- a device known as a conformator, which transmits the axial force to the internal socket surface by means of shot filling the annular gap formed by the socket and conformator.

The shot behaves like a fluid and ensures :
- distribution of the axial force on the socket surface and conformator,
- automatic stretching of the main on assembly.

Any subsequent movement of the main during testing is consequently restricted to residual shot settlement.

Range

Pipes and fittings: DN 1400 to 1800.
For DN 2000, please consult us.

Applications

The ANCHORED PAMLOCK joint is of particular interest where congested conditions preclude the construction of anchor blocks, or in poorly cohesive soils.

Performances

The ANCHORED PAMLOCK joint combines the advantages of flexible joint pipes with welded joint pipes.

The leaktightness of the joint relies on the proven qualities of the push-in STANDARD joint.

Angular deflection :

− 1° (pipe end displacement 14 cm), DN 1400 to 1600.
− 0.5° (pipe end displacement 7 cm), DN 1800

Allowable operating pressure (PFA) :

DNClassPFAPMAPEA
  Allowable operating
pressure
bar 
Allowable maximum
pressure
bar
Allowable test
pressure
bar
DN 1400 to DN 1600C25253035
DN 1800C25161924
DN 2000C25---

Installation

ANCHORED PAMLOCK joint assembly is dealt with in a special leaflet. Please consult us.

Contact

Technical Enquiries:
+44 (0)115 930 0700 
technical.pipes.uk.pam@saint-gobain.com
Customer Services:
+44 (0)115 930 5000 
sales.uk.pam@saint-gobain.com

Videos

Self-anchoring system for potable water and sewer applications - Pamlock | Saint-Gobain PAM UK
Available for ranges DN1400 - 1800 (DN2000 on consultation) that is compliant with our Classical and Natural pipes and fittings with joint deflection of up to 1°. PFA: 25-16 bar (depending on diameter). The joint features a double chambered socket design. The first chamber uses the same sealing socket and gasket as the Rapid Joint. The second chamber provides anchorage by the use of a locking ring, which abuts to the weld bead on the spigot, a conformator held in place by two locking clamps and a steel shot
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pamlock joint

See also

Range of joints
PAM’s anchoring solutions are designed according to two different levels of performance, plus a supplementary range to cater for some specific situations.