Thermal insulation  pipe——PVC Pre-insulated pipe

PVC outer protective pipe rigid polyurethane foam plastic prefabricated direct buried insulation pipe uses PVC pipe as the outer protective pipe of the insulation pipe to protect the insulation layer and the working steel pipe from water, moisture erosion and mechanical damage. Compared with the traditional PE outer protective insulation pipe, it has superior performance, good insulation performance, and saves a lot of energy in long-term operation. It also has good waterproof and anti-corrosion properties, can be directly buried underground, and is convenient and quick to construct.

DHPI PVC pre- insulated pipe insulation technology is one piece, factory applied in a controlled environment. insulated, pre-insulated pipe utilizes a Polyethylene Jacket designed for above or below ground applications. Pipe freeze protection systems, heat tracing systems involving plastic pipe involve a Constant wattage cable system and thermostat control to only turn on when required.

Product advantage

 PVC outer sheath insulation pipe compared with PE outer sheath insulation pipe, the specific advantages are as follows:

1. PVC material and insulation layer polyurethane bonding degree is good: not easy to appear delamination.(processing effect will be better).

2. Good uniformity and consistency of the foam layer, good quality stability: PVC pipe strength, PVC pipe roundness is far better than HDPE pipe, pipe roundness is high at the same time in the foaming process is easier to process, the foam layer uniformity and consistency of the foam layer, quality stability, consistency, good heat preservation.

3. Better thermal insulation: from the thermal conductivity analysis of the same wall thickness, PVC material sheath pipe heat loss compared to the PE sheath pipe this for its 1/2. better thermal insulation, energy saving and consumption.

4. Excellent stress cracking resistance: PVC stress cracking resistance is better than the PE material is not easy to appear such problems occur.

5. Excellent abrasion resistance: the abrasion resistance of PVC material is better than PE, the strength and rigidity of PVC material is far better than PE material, the relative effect in the pipe construction and application will be better.

   Good weather resistance: PVC material to do outdoor use of weather resistance is more excellent, for non-buried use of insulation pipe, PVC sheath can be made into a weather-resistant products, long-term service life in the outdoors can reach ≥ 30 years.

6. Foaming process processing performance is more excellent: because PVC pipe strength, in the same outer diameter of the same wall thickness, the pipe roundness is high at the same time in the foaming process is easier to process, product molding and stability is relatively better.

7. Cost advantage: PVC has a certain price advantage over PE materials. 

8. To solve the problem of recycled materials: pvc material is cheap and inexpensive, there is no use of outsourcing recycled materials problem.

Product Application

1.Municipal freeze pritection including water and sewer mains,service connections ans bridge crossings;

2.Disttice heating and cooling;

3.Steam and comdensate return;

4.Outdoor wood furnace and solar hydronic heating;

5.Mine intake,tailings and reclaim;

6.Snow melt systems;

7.Cryogenice systems;

8.Chemical feed and temperature maintenance;

9.Industrial process