Hewai Wholesale Pex-Al-Pex Pipe Plumbing Material Underfloor Heating System

HEWAI is one of the leading Chinese producers specialized in integratedplastic piping system,we are mainly export and poroduce PEX pipe,PERTpipe,PPR pipe,EVOH PEX/PERT oxygen barrier pipe, PEX-Al-PEXpipe,PE-AL-PE Gas pipe,PERT-AL-PERT pipe.Our products are widelyused in floor heating,water supply,gas,air condition,solar,heating&coolingsystem etc.

With the growing market demand,HEWAI invest and build a new plant withall production lines upgraded to the most advanced high-speed  extrusionequipments, which can produce 300,000meters per day.We have a strict quality control      management from raw material to finishedproducts,only select highest quality raw material  suppliers such as Dowlex, Mitsui Chemicals ,SK ,LG ,BORELEALIS, Lyondellbasell,Kuraray,Hyundai,etc.we have a constant online monitory on all production parameters, and when finally produced there's consist monitory and testing onour on- site labs, that make sure only the best pipes leave the factory.

HEWAI is one of the only Chinese manufacturers that produces in-houseboth the PEX and multilayer pipes and their fittings. This let us offer afull guarantee for the complete system,which is an important advantagefor our clients.
 

Hewai Wholesale PEX-AL-PEX Pipe Plumbing Material Underfloor Heating System

1.What's the multilayer pipe?
Multilayer Pipe, also called multilayer composite pipe MLCP, or composite pipe, has been widely used for hot & cold water plumbing systems, underfloor heating systems & indoor gas distributions.,etc.
Multilayer pipes are a "composite pipe", which are made of composite materials with a five layers' structure. The inner & outer layers are regularly made of PEX/ PERT (or HDPE) material, middle layer is aluminum core, which is welded in a seamless laser welding technology or overlap welding technology. To bond the PEX layers to aluminum layer, a special adhesive shall be used.

2.What types of multilayer pipe can HEWAI provide? And which specifications of multilayer pipe that  can manufacture?

PE-AL-PEXa Pipe,PEXb-AL-PEXb Pipe,PEXc-AL-PEXc Pipe,PERT-AL-PERT Pipe,PEXc-AL-PEXc Pipe

3.Which standards do  multilayer pipe be made into?
Multilayer pipe is made into GB/T18997 standard.At the same time, it can confirm to ASTM F 1281/1282 & EN ISO 21003 standard.


4.What's the main difference between butt welding & overlap welding of multilayer pipe?
Butt welding & overlap welding are the most regular welding technology for aluminum core of multilayer pipe.
 
Overlap welding technology is ultrasonic type welding, by using ultrasonic to weld the aluminum in a overlap way.
utt welding technology, also called "seamless butt laser welding", is to weld the aluminum by laser in a seamless butt welding way.
 
By comparison to overlap welded multilayer pipe, the laser welded pipe is considered to be more stable on aluminum welding jointing, especially when the pipe is rounded & beveled by reamer, the multilayer pipe with laser welding is no easy to crack off.