Definitions of Krah Pipes

The Krah Pipe is formed by thermal winding high density polyethylene (HDPE) winding structure wall tube. The wall pipe is made of high density polyethylene resin as the main raw material, adopts the hot winding poplar process, and adopts the polypropylene (PP) single wall corrugated pipe as the supporting structure to produce the special structure wall pipe with high resistance to external pressure.

Krah Pipes products can be divided into PR, OP, SQ, VW three series.

Among them: 

PR, OP - mainly used for underground pipes

SQ - mainly used in the manufacture of container or CMC

VW - is mainly used for tee, elbow, secondary processing and forming of pipe fittings

The product is most used in PR series, the product inside surface is smooth, external adds structure to the special shape pipe standard length is 6 meters, pipe diameter range for 12 - DN4000, product indexes meet the GB/T 19472. 2-2004 type B structure wall tube and PREN - 13476 European standard requirements.

The performance characteristics of Krah Pipes

1. High quality of thermal winding molding fusion joints

The flat and u-shaped material belts extruded from the die of the extrusion molding machine in the molten state are evenly wound on the heated roller molds according to the predetermined positions to ensure the quality of the fusion joints of the structural wall pipes. Especially in the structural design, the welded joint of flat material belt is covered by polyethylene coated support pipe, which improves the overall anti-pressure ability of the product

2. Excellent installation performance

The Krah pipe is connected by the technology of embedded electric fuse at the socket and socket of the same material, with high connection quality. Can achieve 100% without leakage, ensure the same life of the pipeline system and the safety of operation. At the same time, because the product under the condition of the same application than other tube light weight, easy to transport, construction is convenient and quick, can reduce the construction cost, in the range of application, without concrete cushion layer and concrete jaasiel groove can directly apply the tube after qualified, basically stay do under excavation, side tube, while backfilling, simplifies the construction procedures, shortening the time limit for a project. When the project is checked and accepted, the closed air test is used instead of closed water test, which not only speeds up the checking and accepting speed, but also saves the complicated work and a lot of test cost

3. The wall pipes with good flexibility and high density polyethylene winding structure have good flexibility on the macro level, while the local pipe sections have strong rigidity and overall resistance to external pressure, which can ensure the safety of traffic when used under the road surface with heavy load. Due to the flexibility of the HDPE Krah pipe, the damage loss of the pipe can be reduced to the minimum during the geological activities such as earthquake and uneven surface subsidence, thus improving the ability of the public facilities to resist earthquakes and reduce disasters

4.HDPE is recyclable and can be used as the main raw material of wound structural wall pipes of green environment-friendly products. It is a high-density polypropylene without any toxicity and without any dye in the production process. It is a green product of environmental protection and safety

5. Corrosion resistance, aging resistance and service life guarantee 50 years high density polyethylene has strong resistance to chemical corrosion and erosion. Therefore, the winding structure wall pipe, when conveying corrosive fluid or laying in corrosive soil, does not need anti-corrosion treatment, and its performance is much better than other pipe materials. This product in the design process, chooses the reasonable product structure form, guarantees the plastic pipe service life above 50 years, and in the life time avoids the maintenance

6. The inner wall roughness of the pipe is low, and the inner wall roughness N of the product with large water flow around the structure wall pipe is about 0.010. Therefore, the fluid flow is less than the friction resistance. So alternative diameter smaller winding structure wall tube diameter larger cement pipe in application, under the same conditions using wall pipe winding structure engineering and reliability compared with the traditional pipe material will be improved, comprehensive benefits, especially in the narrow construction site, building density, complex and traffic busy roads and underground pipelines in acid alkaline soil, laid the superiority.

EAGLE is a professional China Krah pips manufacturer, provides you with various HDPE/PP profiled pipes, for more Krah pipe services, please rest assured to contact us!