This page lists the size range held for the HDPE socket fusion Coupling and the wall series against each band. Dimensions are given as dn, the outside diameter of the pipe in millimetres, and wall series as SDR.
Use this page to fix the numbers before an enquiry goes out; use the selection page when the pipe itself has not been specified yet.
Size ladder
The HDPE socket fusion Couplings are supplied dn20 to dn63. The full size ladder inside that range is dn20, dn25, dn32, dn40, dn50, dn63.
Every size in the HDPE socket fusion Coupling ladder is a separate tool, so the ladder is also the list of sizes worth confirming against stock before a schedule is committed.
Wall series by size band
| Size band | Wall series | Typical use |
|---|---|---|
| dn20 - dn63 | SDR11 | service and house connections |
The table splits the HDPE socket fusion Coupling ladder into bands because the wall series that matters changes with the job: small bands are usually specified in both series, while the top of the ladder is normally tooled in one series only.
How to read a size
A size on its own is ambiguous. dn63 exists in SDR11, and the socket depth differs between them, so dn63 alone does not identify a HDPE socket fusion Coupling.
Always read a HDPE socket fusion Coupling size as a pair: the dn figure and the SDR. That pair is what the mould is cut to, and it is what a quotation has to carry.
Tolerances
Pipe outside diameter and ovality follow the pipe standard the line was designed to. Fusion socket dimensions follow the fitting drawing issued with the quotation, and that drawing is the document to work to for the HDPE socket fusion Coupling.
Related pages
Other pages in the HDPE socket fusion Coupling section, each covering a different angle of the same product family:
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