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1. The highest flexibility
2. Enduring pressure resistance
3. Long working life
4. Effective anti-kinking properties

ASTRAL PEX-a Pro

Astral Pipes introduces its new PEX-a Pro System, based on the well-known expansion ring technology (Shrink-Fit) which is meant for distribution of hot and cold water plumbing applications. This piping system consists of cross-linked polyethylene pipes (PEX-a) in combination with brass / PPSU fittings which can be joined with expansion ring technology. This system is one of the most advanced systems available globally for hot and cold water plumbing.
The cross linking technology in generic way means a process through which Polyethylene molecules get some links between the polyethylene chains that provide high resistance to pressure and temperature. This makes polyethylene reticulate a material especially suitable for making pipes which can handle water circulation at high pressures and high temperatures up to 95°C.
The unique and innovative expansion ring technology makes use of the shrink-back property which is effective only with PEX-a pipes enabling a quick and easy installation. In this process, due to shrinking property of the material, the pipe presses over the body of the fitting with substantial force which makes a reliable and lasting joint – without any need of o’ rings. This system offers much better water flow compared to other alternative fittings and a wide range of tools and accessories help establish safe and trouble-free installation.

Pipes

Fittings

Technical Details tab

NOMINAL SIZE (mm)OUTER DIAMETER (mm)TOLERANCE FOR OD (mm)MINIMUM WALL THICKNESS (mm)
16 16.0 +0.3 1.8
20 20.0 +0.3 1.9
25 25.0 +0.3 2.3
32 32.0 +0.3 2.9

 

STANDARDS AND SPECIFICATIONS

  • ISO 15875-1

Plastic piping systems for hot and cold water installations-Crosslinked Polyethylene(PE-X)- Part 1: General

  • ISO 15875-2

Plastic piping systems for hot and cold water installations-Crosslinked Polyethylene (PE-X) - Part 2: Pipes

 

TECHNICALCHARACTERISTICS

PROPERTIESABBREVIATIONVALUEUNITS
Linear expansion L 1.4x10 -4 K -1
Thermal conductivity Rl 0.38 W/mK
Maximum working temperature T 95 oC
Maximum temperature point T 110 oC
Maximum working pressure at 95oC P 6 Bar
Roughness E 0,007 mm
Density R 0.945 gm/cm3

 

Thermalexpansion

Like all piping material, Astral PEX-a PRO Pipes expand when heated and contract when cooled. Astral PEX-a PROPipes (regardless of pipe diameter) will expand as mentioned in table, therefore, allowances must be made for this resulting movement. However, laboratory testing and installation experience have demonstrated that the practical issues are much smaller than the coefficient of thermal expansion would suggest.The stresses developed in Astral PEX-a PRO Pipes are generally much smaller than those developed inmetal pipe for equal temperature changes because of the difference in elastic modulus. Required loops are smaller than those recommended by the Copper Development Association for coppersys tems. Expansion is mainly a concern in hot water lines. Generally thermal expansion can be accommodated with changes in direction.

 

TABLE OF THERMAL EXPANSION OF THE ASTRAL PEX-a PRO PIPES:

Pipe section (in mtrs) Differenceof temperatures (°C)
  10 20 30 40 50 60 70 80
1.0 2.00 4.00 6.00 8.00 10.00 12.00 14.00 16.00
2.0 4.00 8.00 12.00 16.00 20.00 24.00 28.00 32.00
3.0 6.00 12.00 18.00 24.00 30.00 36.00 42.00 48.00
4.0 8.00 16.00 24.00 32.00 40.00 48.00 56.00 64.00
5.0 10.00 20.00 30.00 40.00 60.00 60.00 70.00 80.00
6.0 12.00 24.00 36.00 48.00 70.00 72.00 84.00 96.00
7.0 14.00 28.00 42.00 56.00 80.00 84.00 98.00 112.00
8.0 16.00 32.00 48.00 64.00 90.00 96.00 112.00 128.00
9.0 18.00 36.00 54.00 72.00 100.00 108.00 126.00 160.00
10.0 20.00 40.00 60.00 80.00   120.00 140.00  

Values of expansion expressed in mm

 

CALCULATION OF EXPANSION

For piping systems having long straight run may require an offset or loop. Only one expansion loop, properly sized is required in any single straight run, regard less of its total length. If more convenient, two or more smaller expansion loops, properly sized, can be utilized in a single run of pipe to accommodate the thermal movement. Be sure to hang pipe with smooth straps that will not restrict movement.

For convenience, loop (or offset) length have been calculated for different pipe sizes and different run length with a temperature. The results, shown in tables, are presented simply as handy guide for quick and easy determinations of acceptable loop length for the approximate conditions. Loop length for other temperatures and run length can be kept as per given table herewith:

PIPE DIAMETER LONGITUDINAL EXPANSION (mm)
  10 20 30 40 50 60 70 80 90 100 110 120 130 140
16 17.71 25.04 30.67 35.42 39.60 43.38 46.85 50.09 53.13 56.00 58.73 61.34 63.85 66.26
20 19.80 28.00 34.29 39.60 44.27 48.50 52.38 56.00 59.40 62.61 65.67 68.59 71.39 74.08
25 22.14 31.30 38.34 44.27 49.50 54.22 58.57 62.61 66.41 70.00 73.42 76.68 79.81 82.83
32 25.04 35.42 43.38 50.09 56.00 61.34 66.26 70.84 75.13 79.20 83.06 86.75 90.30 93.71

£=expansion loop value

 

Supports

Horizontal& Vertical runs of Astral PEX-a Pro Pipes should be supported by pipe clamps or by hangers located on the horizontal connection close to the Riser. Hangers should not have rough or sharp edges, which can come in contact with the pipe.

 

HORIZONTAL & VERTICAL SUPPORTS

NOMINAL PIPE SIZE (mm) SUPPORT SPACING (inch)
20 °C 80 °C
HORIZONTAL VERTICAL HORIZONTAL VERTICAL
16 23 30 18 23
20 25 33 20 26
25 29 38 23 30
32 34 45 27 35

FEATURES & ADVANTAGES

RESISTANCE TO HIGH TEMPERATURES & PRESSURES

Astral PEX-a Pro pipes are suitable for use in working temperatures up to 95ºC, being able to withstand accidental spikes of up to 110ºC. Also, given its manufacturing quality and process, it offers much more pressure resistance than any other cross-linked systems.

 

LOW THERMAL CONDUCTIVITY

Its low conductivity coefficient (0.38 W/mK) provides energy savings by reducing heat losses. Cross-linked polyethylene pipes, being bad heat conductors, are excellent thermal insulators.

 

ABSENCE OF CONDENSATIONS

The condensations, very routine in metal pipes, occur rarely in Astral PEX-a Pro pipes, due to its low thermal conductivity.

 

LIGHTNESS

Astral PEX-a Pro pipes are 4 times lighter than metal pipes which facilitates their handling and transport.

 

FLEXIBILITY

The flexibility of Astral PEX-a Pro pipes saves money, joints and reduces installation times.

 

PLASTIC MEMORY

Astral PEX-a Pro pipes have plastic memory which means that if the pipe is blocked/impacted during the installation, it can be reused easily, since it recovers its original form with an application of hot air.

 

NONCONDUCTIVE - NON CORROSIVE

Astral PEX-a Pro pipes do not produce galvanic corrosion. Also, they do not get affected by harsh water and are completely free of any kind of corrosion. Thanks to its extremely smooth surface, inlays are avoided of lime rust which are so frequent in metallic pipes. The Astral PEX-a Pro pipes ensure that the initial flow will keep for life.

 

LESS NOISE

Thanks to its manufacturing material - Polyethylene - and the resulting flexibility, PEX-a Pro attenuates the problem of noise and offers higher water circulation speeds. The metal pipes are very noisy at water speeds above 1m/sec, while the PEX-a Pro pipes do not produce noise upto the speeds of 2.5m/sec.

 

HIGHER FLOWS

Thanks to its smooth surface, Astral PEX-a Pro pipes have lower losses of loading than the metal pipes, and with that, higher flows are achieved at equal inner diameters.

 

LONG LIFE

The life of Astral PEX-a Pro pipes under normal conditions can exceed 50 years of service even at elevated temperatures and pressures. In any case, the Astral PEX-a Pro pipes guarantee a life superior to any other metal or plastic pipe.

 

SUITABLE FOR DRINKING WATER

Astral PEX-a Pro pipes respect the organoleptic properties of water. Its use is authorized by the health authorities of the European Union. With PEX-a Pro, one can be assured of the purity of water and avoid the problems of salt / rust formation which is so frequent in metal pipes.

 

ADVANTAGES OF ASTRAL PEX-a PRO SYSTEM

    • Quick and easy assembly

    • Better water flow and, smaller pressure loss

    • Watertight without using o' rings and irrespective of the condition of the assembly tool

    • Even compression force throughout the ring length

    • A 20-year safety record

 

Unique Benefits
 

WATERTIGHT

The Astral PEX-a Pro joining system guarantees an absolute watertight joint, without the need to perform reviews. During the manufacturing process, it goes through multiple tests using advanced laboratory equipments such as one used for the test of temperature cycles, in which the joint is subjected to cycles of cold water and hot water that simulate working conditions throughout its life. These tests guarantee the absolute tightness of the joints made with Astral PEX-a Pro pipes and fittings. The strength and duration of the joint is even greater than the pipe itself.

 

COMPACT

Astral PEX-a Pro accessories don’t protrude from the pipe, making it ideal for use in narrow partitions or pladur type partitions.

 

RECESSED

The Astral PEX-a Pro system is one of the few systems authorized by the European Union authorities for wall embedment use.

 

NO WAITING TIME

The Astral PEX-a Pro system eliminates the time of waiting before you can perform the pressure test, and put the installation to work immediately.

 

LEAK PROTECTION

Although a properly installed Astral PEX-a Pro system is secured from leakage, there may be occasions when extra precautions against damage to the construction of a building from leakage are needed. Astral’s Pipe-in-Pipe allows the pipe to be withdrawn and replaced, especially in solid floors or walls. Any leakage is retained within the conduit and can be detected.

 

EASY RENOVATION

In addition, in a concealed pipe run without any T-joints, an accidentally damaged section of pipe can be withdrawn and replaced, whilst minimising structural damage.

 

Expansion ring technology with stop edge for accurate positioning on pipe

• No O' rings or other movable parts, reducing chances of leakages

• Visual connection and possibility of full plastic system