1. ProductionProcessDifference
(1) PE-XA refers to Peroxide Crosslinked ,presently in China, pexa pipe production line adopts Plunger/Ram type extruder like below photo.
(2) PE-XB refers to Silicane Crosslinked, the PEXB Pipe production line adopts single screw extruder.
2. PhysicalPerformanceDifference
PE-XA and PE-XB have similar chemical component, basic raw materials is same, but their physical performance has some difference.
(1) PE-XaisinitiatedinFranceat1950s.
(2) PE-XbisinitiatedinEngland,German,Italyafterprocessmodificationat1960s.
3. FinalPipeDifference
(1) ColorMasterBatchadded
(2) Flexibility
PE-Xa pipe is more flexible than PE-Xb, so during pipe line installation process, the bend performance is better than pexb.
4. EVOH/OxygenBarrierLayerEquipment
(1) ThreeLayers
(2) Fivelayers
Differences of PEX-a, PEX-b and PEX-c |
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Tube |
PEX-a |
PEX-b |
PEX-c |
Method of Cross-Linking |
Peroxide |
Silane |
Radiation |
Density |
0.938 |
0.95 | 0.94 |
Rigidity |
Good |
Best | Better |
Pliability |
Best |
Good | Better |
Health degree |
Better |
Good | Best |
Cross-linked de gree |
≥70% |
≥65% |
≥60% |
Life extent |
Long |
Longest | Longer |
Best usage
|
drinking water supply |
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under floor heating |
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medical, food and chemical industry |
high temperature heating system |
Medical food and chemical industry |