Posts Tagged PEX-AL-PEX

PEX and the PEX-AL-PEX competitor

Jan 18

Posted by Edmundo Plumber in PEX Tubing & Pipe, Radiant Heating | Comments off

When the reinforced PEX showed up on the market, many people cared less about price and looked for the high quality of this product in comparing to the regular polymer piping installation.

PEX-AL-PEX tubing happens to be higher priced as compared to PEX as a result of selection of causes. The main justification is manufacturing tasks. The PEX-AL-PEX offers an aluminum foil in between, encompassed by two levels of PEX. The best part about the reinforced PEX is the fact that it costs only 50 cents more than a regular polymer pipe. For those buying large quantities the price can feel a bit higher, but wholesales and promotions are available online, and one should have no problem in finding cheaper material.

Despite having the aluminum foil, bending the alloy is definitely rather quick rarely are special devices are required. In comparing to the actual natural PEX, the PEX-AL-PEX may resist under increased pressures, like the varieties of hot water, prolonging the pipe’s resistance as many as 100 degrees Celsius.  The layers allow the hot water line produced PEX-AL-PEX can be used close to the cold one without the presence of usual situations of water vapors developing and dripping on to the floor that has been a main dilemma of PEX chosen inside. PEX-AL-PEX also maintains heat in much better when compared to PEX, therefore a lot less power is going to be essential to heat the water or reheat it.

Because of the layers used, PEX-AL-PEX needs quite a few exclusive equipments which are less affordable compared to ones for traditional PEX.

This strengthened PEX may be used outside for main pipes. The regular PEX cannot be used for this type of installations, only due to high pressures in which the regular PEX cannot stand for long. Within winter weather, the PEX-AL-PEX could not resist in frequent hot and cold series, yet for a time of year of three months yearly in cold temperatures, the PEX-AL-PEX might hold on very good. Much more than this, the PEX-AL-PEX isn’t really damaged by freezing water into the tube, though conventional PEX can crack within instance.

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Inaccessible volumes for PEX tubing

Jul 20

Posted by Edmundo Plumber in PEX Tubing & Pipe | Comments off

How to fend off this feature – in fact such a good pipe? Make temperature compensator (see special installation instructions), and at the domestic level has never shut the pipe segments longer than a meter in the closed or close the channel to provide an air gap or a damper pad, enter the pipe in the insulating tube with a wall not less than 13 mm. A gasket in the inaccessible volumes for PEX tubing (after pressing the control) is completely harmless.

Another more radical solution – an introduction to the design of pipe-layer aluminum foil (it turns out that something like a PEX-AL-PEX). And once again achieved several goals – decreasing temperature deformation (one meter is lengthened by 0,026 mm), decreases oxygen barrier dozens of times (which is very important for heating systems), increases the strength of the pipe. But the price of such pipe increases.

PEX-AL-PEX has a lower coefficient of expansion – one meter lengthens when heated by one degree at 0,02 mm. This is quite a bit, and in addition, internal stresses for metal pipes are not so terrible. But the elongation is very unpleasant for the PEX fittings. PEX-AL-PEX tubing can be laid in a dense Stroebe and put in a closed volume, but given the requirements for the compounds – all Collet collapsible PEX fittings must be accessible and controllable.

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In municipal systems can use the following polymeric materials.

Jun 17

Posted by Edmundo Plumber in PEX fittings, PEX Tubing & Pipe, PVC fittings | No Comments

pipe pex not pvc

1. PEX PE-80 (PE-100):

* Minimum of prolonged strength: 6,3 MPa PE-63 (PE-63); 8,0 MPa PE-80 (PE-80); 10,0 MPa PE-100 (PE-100);
* Crosslinked polyethylene PE-C (PEX): with peroxides and EIT (PEX a); by silane process EIT (PEX b);

radiation method with EIT (PEX c); with compounds nitrogen EIT Dr. (PEX d).

2. PP PEX (PP):

* Type 1 (homopolymer) PP-H (PP-H);
* Type 2 (block copolymers) PP-B (PP-B);
* Type 3 (randomsopolimer) PP-R (PP-R).

3. PB Polybutylene (PB).

4. PVC Polyvinyl chloride (fittings, elbows, couplings):

* Chlorinated CPVC (PVC-V);
* Polivinildeftorid PVDF (PEHD).

5. Polytrifluorochloroethylene (PTFE-4) Ft-4 (PTFE).

6. Polyester PE.

7. Polyacryl PA (PA).

8. Composite materials:

* Metal-MP: crosslinked polyethylene-aluminum – crosslinked polyethylene P-Al-P (PEX-AL-PEX); PEX-aluminum-PEX PP-AL-PP (PP-AL-PP); PEX-aluminum-polyethylene P-Al -PP (PEX-AL-PP);
* Glass PO: epoxy STE (GRE); on polyester-based CTP (GRP);
* Reinforced PEXs;
* Polymer.

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