For all information regarding leak tightness tests, please consult our technical manual. Page 105-107 chapter 7.21 Leak tightness and pressure resistance tests.

Use appropriate formers and bend springs. References BI, BA, BM and BM-F

Both grades comply with operational conditions 10 bar at 70 °C however the standard pipe has a thicker aluminium core and even higher performance in fail safe conditions.

A PE-RT or PE-Xc pipe expands more because it is a solid plastic pipe. A RIXc or standard pipe has an aluminium core and therefore expands less.

There is physical and chemical cross-linking. Tubes are cross-linked to optimise the strength and durability of the tube.

Chemical cross-linking is achieved by adding peroxide or silane to polyethylene. A physical cross-linking is created by exposing the tube to electron beams. Henco uses physical cross-linking because it is the purest cross-linking.

National regulation relating to hot water vary between 60- 70°C.

1. Lighter weight
2. Fully modular composition
3. Prefabricated assembly possible
4. Re-usable

No, this is not permitted by law.

Specialist advice should be sought from companies such as Promat.

Henco naked pipes are Euro Class E, in some instances when embedded Henco produce a special sprinkler range that is approved by VdS.

Yes, for example as ground pipes. In this case, we recommend combining the Henco standard multilayer pipe with the PVDF press fittings. It is best to protect the pipe additionally with, for example, a PVC protective tube. Please note that Henco inspection certificates only apply to indoor installations.

Yes, at a maximum pressure of 10 bar and ambient temperatures between -10°C and 40°C.

Only if the soil does not contain any chemicals and the pipe is protected from external damage. Brass fittings should always be protected from corrosion and we also recommend protecting PVDF fittings from external impact with, for example, a PVC pipe.

The insulation is vapour-proof, but not suitable for long-term outdoor use or applications in moist sandy soil. If the insulation must nevertheless be used in those conditions, it is best to apply a waterproof protective tube (such as a PVC pipe) around the insulation.

Yes, the pipes may be exposed to sunlight for a short period of time. Polyethylene is not UV-resistant, so Henco tubes should not be permanently exposed. For specific outdoor applications, Henco can produce unique UV-resistant pipes on request.

The minimum temperature for Henco multilayer pipes and PVDF press fittings is -20°C. For solid plastic pipes, the minimum temperature is 7°C.

Henco multilayer pipes and PVDF press fittings with gas marking may be used for gas. Please note that gas application is only allowed in countries where a Henco gas inspection and certificate is available.

Yes, when Henco multilayer pipes are combined with PVDF or brass press fittings with yellow gas marking. For diesel applications, the sealing material should be HNBR (hydrogenated nitrile rubber). HNBR is a type of rubber that is resistant to high temperatures and petroleum-based oils. This is only the case with gas-marked Henco products.

This is currently being investigated, but we cannot guarantee it yet.

Only Henco standard multilayer pipes and PVDF fittings qualify for this. The Henco brass products may not come into contact with seawater.

It can if the paint is water based.

We recommend draining Henco pipes in good time if there is a risk of freezing. To prevent freezing, pipes can be thoroughly insulated or fitted with a heat tape.

Yes, in combination with Henco multilayer pipe and PVDF fittings. The brass threaded fittings must not come into contact with softened water.

Yes, and for fittings this applies to both PVDF and brass fittings. For that application, the correct ratio is 45% glycol and 55% water. The minimum temperature is -10°C.

The 24P-/25P fitting and a jacketed or pre-insulated pipe.

The PE foam has a solid PE outer shell with grid structure in red or blue that is also vapour-tight. This structure protects the foam from damage, thus maintaining its insulating effect even during rough construction work.

Henco tubes up to and including 26 mm diameter can be bent with the appropriate tools from the Henco product range. For pipes with a diameter from 32mm onwards, it is best to use couplings.

Check which certificates Henco complies with here.

The correct ratios and temperatures for combining Henco tubes with Hadex -Herlisil and can be found in our technical manual on the Henco website.

Can Henco tubes be rinsed with hydrogen peroxide/sodium hypochlorite/chlorine dioxide?

When rinsing pipes, it is best to consult the table below. In case of additional questions, please contact your Henco representative.

Table 1: disinfectants for short-term chemical disinfection of Henco ML pipes according to DVGW W577

 (*) The concentration indicated is that of free chlorine.
Maximum frequency: once a year

The standard dimension is 153mm, only the 28PV-16031603-1 has a centre distance of 120mm.