socket fusion Couplings are moulded from HDPE and fused to PE pressure pipe. The range covered on this page runs dn20 to dn63 in SDR11. Sizes are quoted as dn, the outside diameter of the pipe in millimetres.
Everything below applies to the socket fusion Coupling specifically. The neighbouring pages in this section cover selection, dimensions, installation and the application side separately.
Product range
The socket fusion Coupling family covers couplings and repair couplings.
Each type is moulded to the outside diameter of the pipe it joins, so a fitting and its pipe share one fusion geometry. For the socket fusion Coupling that means the socket depth and the fusion zone are set by the dn size and the wall series together, not by the fitting type.
Size range and wall series
Sizes for the socket fusion Coupling are grouped into bands by the work they do.
| Size band | Wall series | Typical use |
|---|---|---|
| dn20 - dn63 | SDR11 | service and house connections |
Wall series held are SDR11. A unit moulded for one series will not close correctly on pipe of the other, which is the single most common cause of a rejected joint on this product.
Material and marking
socket fusion Couplings are moulded from HDPE compound with the lot certificate on file. Each unit carries the dn size, the SDR and the material grade on the body; black compound with a co-extruded stripe is the standard supply.
Do not fuse a socket fusion Coupling whose marking cannot be read. If the marking is missing, the unit cannot be matched to a wall series and the joint cannot be qualified.
Applications
socket fusion Couplings are used for potable water distribution, gas distribution, industrial process lines, mining dewatering and irrigation. Where the trench is narrow or the pipe cannot be clamped square, this family is chosen over socket fusion because the joint is made from outside the pipe.
For the socket fusion Coupling the range that matters in every one of those sectors is dn20 to dn63, and the wall series follows from the design pressure of the line rather than from the sector itself.
Ordering information
Quote the type, the dn size, the SDR of the mating pipe and the destination port. For the socket fusion Coupling the size band to state is dn20 to dn63.
Related pages
Other pages in the socket fusion Coupling section, each covering a different angle of the same product family:
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