EXPRESS NEW Vi and EXPRESS New Vi "special insertion" junctions
The EXPRESS NEW Vi junction is a new generation of mechanical junctions. The EXPRESS NEW Vi and EXPRESS NEW Vi “special insertion” junctions were designed to simplify installation and rationalize the components while retaining the performance of the EXPRESS junction.
The EXPRESS New Vi joint is an anchored mechanical joint used to make self-restrained pipelines.
Anchoring takes up the axial forces, making concrete thrust blocks unnecessary.
It adapts to all EXPRESS sockets and all smooth spigots.
Main characteristics
- Simplified components:
- a single joint for both tightness and locking
- no spacer (unlike the EXPRESS Vi joint)
- gland and nuts are similar to the non-anchored version
- It can be pre-assembled outside the trench
- Easy to assemble
Range: DN 60 to 300.
Accessories: gland, joint and bolts.
The bodies of the EXPRESS range pipes and fittings are kept
Principle
The basic principle of the anchored joint consists of transferring the axial forces from one pipeline element to the next, therefore making it impossible to separate the junction.
The locking ring with inserts on the EXPRESS New Vi joint is used to anchor the fittings (bends, tees, tapers, sleeves, etc.) by hooking onto the pipe spigot, thereby avoiding the need for concrete thrust blocks.
With this type of anchoring, there is no weld bead on the spigot. Therefore, it can be fitted on all smooth spigots and EXPRESS sockets.
Description
Express New Vi
Express New Vi joint
Express New gland
Express New bolts
Since the EXPRESS New and EXPRESS New Vi glands are similar, it will no longer be possible to distinguish between non-anchored and anchored junctions after installation. A ring identifying anchored junctions can be inserted on the spigot, against the side of the flange.
EXPRESS New Vi « special insertion »
Express New joint
Express New gland
Express New Vi joint
Express New gland “special insertion”
Range
Express New accessories: DN 60 to 300
Application
Buried or above-ground pipelines.
Replacement of concrete thrust blocks when space is limited or when they are difficult to produce. Laying on a steep slope or in a casing. Faster installation.
The EXPRESS New Vi joint is suitable for all EXPRESS fittings and anchors on all the spigots of ductile cast iron pipes and fittings presented in this catalogue.
The thickness of the spigots’ coatings must not be greater than 600 microns
The EXPRESS New Vi joint cannot be used on lamellar graphite cast iron pipes (“grey cast iron”).
Performances
The tightness of this joint depends directly on the tightening torque of the bolts and on the compliance with the assembly instructions determined by PAM.
Resistance to pressure
| DN | Class | PFA | PMA | PEA |
|---|---|---|---|---|
| Allowable operating pressure bar | Allowable maximum pressure bar | Allowable test pressure bar | ||
| DN 80-100-150 | C40 | 16 | 19 | 24 |
Angular deflection
| DN | Allowable laid deflection (degrees) | Displacement (cm) |
|---|---|---|
| DN 80-100-150 (6m) | 5° | 52 |
Gap
| DN | Gap | |
|---|---|---|
| Aligned (mm) | Deflected (mm) | |
| 80 | 42 | 34 |
| 100 | 43 | 33 |
| 150 | 47 | 33 |
1- Start of tightening (O Nm)
No anchoring
No watertightness.
Insert-pipe anchoring
No watertightness
3- Complete tightening (12 Nm)
Insert-pipe anchoring
Watertightness
Standards
This joint complies with the technical specifications of standard EN 545 and ISO 2531.
Performance tests advised by this standard have been performed.
The joint ring complies with standard EN 681.1.
Packing
EXPRESS New junction: supplied in kit only, with ruler.
EXPRESS Vi and EXPRESS New Vi components (gland, joint and nuts) are not interchangeable since the geometries of the joints, glands and nuts are different.
Installation
The EXPRESS New Vi joint assembly (gland, joint gasket and bolts) is available in kits, from DN 60 to 300.
It can be pre-assembled outside the trench.
Joint assembly direction: the white ink marking indicates which side of the joint faces the flange.
Never push fully into the socket and respect the joint depths indicated on the assembly instructions (ruler supplied).
“Special insertion” Express New Vi for maintenance and repair
The EXPRESS New Vi kit cannot be used alone for insertion between two static spigots since:
- The EXPRESS Vi junction requires movement (of the spigot or the sleeve) when tightening to ensure water tightness and anchoring.
- Using the EXPRESS Vi in insertion creates serious risks of leakage. When tightening, anchoring is activated before the joint is correctly compressed to ensure water tightness.
The “special insertion” Express New Vi kit is the technical solution required if the two elements to be connected are completely static.
Application
- Tightness function
Firstly, tightness is guaranteed by the EXPRESS New locking joint and its EXPRESS New gland.
- Locking function
Secondly, locking is guaranteed by the EXPRESS New Vi joint plus a second “special insertion” EXPRESS New gland.
