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15) NEW PE-Xc Hot Pipes System: ALMATHERM PE-Xc Material: PE-Xc / EVOH / PE-Xc Standard: EN ISO 15875, DIN 4726 Details: 5-layer, particularly resistant pipe of cross- polyethylene PE-Xc with increased heat resistance (acc. to EN ISO 15875), with an oxygen barrier of EVOH according to DIN 4726, Tmax 110°C.
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| Dimension | Unit | Large package | Small package | Weight [kg/pcs] |
Volume [dm3/pcs] |
Catalog number | D [mm] | s [mm] | I [mm] |
|---|---|---|---|---|---|---|---|---|---|
| 16 x 2,0 | m | 200 | cardboard | 0,090 | 0,60 | AA121016200 | 16 | 2,0 | 200 |
| 16 x 2,0 | m | 400 | foil | 0,090 | 0,60 | AA121016400 | 16 | 2,0 | 400 |
| 17 x 2,0 | m | 200 | cardboard | 0,100 | 0,60 | AA121017200 | 17 | 2,0 | 200 |
| 17 x 2,0 | m | 400 | foil | 0,100 | 0,60 | AA121017400 | 17 | 2,0 | 400 |
| 18 x 2,0 | m | 200 | cardboard | 0,110 | 0,60 | AA121018200 | 18 | 2,0 | 200 |
| 18 x 2,0 | m | 400 | foil | 0,110 | 0,60 | AA121018400 | 18 | 2,0 | 400 |
| 20 x 2,0 | m | 200 | cardboard | 0,125 | 0,60 | AA121020200 | 20 | 2,0 | 200 |
| 20 x 2,0 | m | 400 | foil | 0,125 | 0,60 | AA121020400 | 20 | 2,0 | 400 |
Demands on the heating pipe:
The most important component of a heating system is the heating pipe.
The PE-Xc 5-layer heating pipe provides the following benefits:
* very good long-term resistance during the internal pressure test
* good thermal ageing stability, thus no damages caused by thermal ageing when used in ccordance with the regulations
* stress cracking resistance
* good resistance to authorized chemical solvents, i.e. also resistant to heating water additives such as inhibitors
* oxygen tightness according to DIN 4726
* installation at low temperatures possible without heat treatment
* laying with narrow bending radii
* corrosion resistance
* smooth pipe walls, i.e. minimal pressure loss and no incrustations
* good rapid crack propagation resistance and abrasion resistance
* impact resistance at low temperatures
The ALMATHERM electron beam cross-linked PE-Xc heating pipe has all these properties. The requirements set forth in EN ISO 15875-1 for PE-Xc pipes and in DIN 4726 for heating pipes are met and even surpassed.
Classification of operating conditions according to EN ISO 15875-1:
Standard PE-Xc pipes:
Raw Material:
The basic material consists of high density polyethylene types of a high molecular weight supplied by renowned raw material producers. Special additives prevent thermal degradation and the influence of metal ions (e.g. of brass fittings).
Pipe Production:
The pipes are extruded in a pipe extrusion process on state-of-the-art manufacturing plants, which have been optimized for the processing of polyethylene of high molecular weight. The multilayer structure is produced in a specially devoloped co-extrusion process. The outer protective layer of this special 5-layer-pipe keeps the oxygen barrier safe from mechanical influences.
Corsslinking:
Crosslinking, i.e. the linking of the polyethylene molecules to a macromolecule with a spatial network is continuously done after extrusion by fast high-energy electrons on Europe's most modern and efficient electron accelerators.
Due to the crosslinking the known dropping of the internal pressure resistance - particularly when higher temperatures are concerned - is avoided. In addition, the pipe is insensitive to stress cracking and the influence of chemicals ensured by the crosslinking procedure.
Technical properties of the ALMATHERM PE-Xc pipes:
Quality assurance by internal control:
During production the PE-Xc pipe of ALMATHERM has to undergo strict controls according to the relevant product standards such as EN ISO 15875 and DIN 4726.
Among other investigations, the following tests are made:
* preprocessing control of the raw material charges
* dimensional continuity and accuracy of the pipes
* mechanical-technological tests according to standard, eg internal pressure test
Quality assurance by external control:
The most important characteristics are constantly tested within the scope of supervision contracts.
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