Eagle is professional manufacturer to produce large diameter HDPE/PP spiral wound pipe production line and large diameter Reinforced Thermoplastic Pipe line (LRTP). We are successful to supply all the world with spiral profile wound pipe and LRTP production line from DN300mm to DN4500mm and have more than 15 years' experience.
We focus on developing and manufacturing the technology and equipment to produce HDPE/PP spiral wound pipe and LRTP pipe, HDPE/PP spiral wound tank, fittings manhole, etc. Our product includes HDPE/PP spiral pipes, HDPE or Pp spiral wound pipe production line, HDPE/PP spiral tank winding machine, mandrel (production tooling), single wall corrugated pipe machine, HDPE/PP spiral manhole boring machine, HDPE/PP spiral tank welding machine, etc.
SERVICE CONCEPT
Continuously improve customers' satisfaction with our professional, timely and high-efficient service.
Professional
We have a team of competent after-sale service engineers, who are dedicated, amiable and dutiful for the normal operation of machines.
Timely
After-sales service hotline bilingually. Wherever you are, just pick up your phone, we'll be with you. We will provide you with the best solution in the shortest possible time.
High-efficient
Efficient professional service, one-to-one consulting service, closed-loop operation to minimize failure time.
A granular bed and surround detail is standard for the installation of the Krah pipes system. The trench bed and surround details are to ensure the most cost effective and optimum construction to suit each individual project.
Static calculation and determination of the profiles The more information is available, the more detailed a pipe can be produced according to the requirements by using the Krah pipe system the right profile for every action can be defined. It is very important that the pipe is installed exactly as stipulated in the static calculation. Here the trench depth which has to be given by the customer is particularly significant.
Calculation of Flow Rate To determine the flow rate “Q" for a fully filled pipe in a continuous discharge, the socalled “normal discharge”- for public sewer pipes, the ATV A 110 standard and alsothe European standard DIN EN 752 recommends to use the formula which is relatedto Prandtl-Colebrook and is called the “general discharge formula”:
Q= flow rate [m3/s] Di = internal diameter[m] V= kinematic viscosity for sewage [m2/s] (acc. TO ATV A 110:v=1.31 x10-6[m2/s]) j= energy gradient, at normal discharge [-] k= hydraulic effective roughness [m] g= acceleration due to gravity The values of k is indicated in the table of the ATV A 110 standard as real roughness of 0.25 to 1.50 mm (depending on the kind of pipe). All possible losses are included in the value.
Determined Location
Manhole Design
Site design
Raw Material Selection & Sourcing
HDPE, or High-Density Polyethylene, is a type of polyethylene plastic that is known for its high density, strength, and durability. It has a higher molecular weight and a lower degree of branching than other types of polyethylene, which gives it greater strength and chemical resistance. HDPE is commonly used in applications where these properties are essential, such as in containers, pipes, geomembranes, and injection-molded products. It is also recyclable, which makes it an environmentally-friendly choice. HDPE is resistant to weathering, UV radiation, and temperature changes, making it suitable for outdoor applications.
Manufacturing Process
The plastic (PEHD or PP) is melted in the main extruder (mostly black material to provide the required UV-resistance of the spiral pipe) and in the co-extruder (mostly yellow material to provide the required bright, inspection friendly inside surface). In the melt distributor the material flow of the main extruder is divided into two flows; one flow is for the spiral pipe inner layer and other flow is for the outer layer (corrugation layer). The ratio between the two flows is adjusted. In the inner wall die head the black material (from the main extruder) will be merged with the yellow material (from the co-extruder) and the result will be a solid two-colored band for the waterway of the spiral pipe. In the other die head a core-tube will be coated with the black material to produce a round profile. The band from the inner layer die and the coated core tube from the other one is jointed together on the rotating mandrel (V2) to produce the pipe. By closing the material flow of the second die head a solid socket and spigot are produced homogeneously and during the actual production process of the profiled pipe, which means that no additional work and machines are required. By changing dies and the production program several profile constructions and wall thicknesses can be produced.
Advantage of technology
Online to produce socket and spigot Eagle Machinery make special design to produce the spiral profile pipe with socket and spigot for several different jointing method during the spiral profile pipe production process, such as electro fusion joint and rubber seal joint. The socket and spigot is made online without other machine, it can meet any engineering design and helps to keep the low investment. Flexible production Eagle Machinery make unique design for the spiral profile pipe machine to produce the PEHD/PP spiral pipe from DN200 to DN4000mm on one line. The production changing time is less than 15minutes to change one diameter to another diameter or to change one profile design to another design. This machine can produce the spiral pipe with ring stiffness from SN1 to SN16, even more and it can produce pressure pipe and non-pressure pipe
High output The machine output can be upto 1400kg/h with high efficiency extruder.
Machine component Extrusion unit Winding unit Cooling and milling unit Dismantling unit Finishing unit
Quality Control & Testing
Before production control The raw materials and any other input are tested before production, for example the melting flow ratio, moisture and color. Usually any new delivery of material is tested before it is stored. Every test is documented, analyzed and filed.
During production control During the production the individual working steps are continuously supervised and documented. Moreover the most important dimensions are measured and if necessary, corrected.
After production control
After the production, the final product is tested and compared to the requirements of the customer. The final minute is written and the documentation is finished. In order to guarantee that the static theoretic values are conforming to the reality, pipes are continuously taken out of production and they are tested with the help of ring stiffness according to DIN 16961 or ISO 9969.
Before production control
During production control
After production control
Logistics & Transportation
The transport of Krah pipes is very easy as they are very good to move due to the low weight. It only has ensured, that the pipe cannot move and that they are stored in the right way, in special cases, e.g. if the pipes are shipped in containers, it is recommendable to adapt the total length of the pipe to the shipping conditions in order to use the space efficiently.
On-site Installation & Technical Support
KRAH PIPE BENEFITS
HDPE/PP Krah spiral wound pipe systems with various stiffness classes which are designed for utility and industrial applications. It is made from High Density Polyethylene (HDPE) or PP to manufacture these pipes. The diameter of HDPE/PP Krah spiral pipe is from DN/ID300mm to DN/ID 4000mm. The ring stiffness is SN2, SN4, SN8, SN16 or according to customer requirements.
HDPE/PP Krah spiral wound pipe systems with various stiffness classes which are designed for utility and industrial applications. It is made from High Density Polyethylene (HDPE) or PP to manufacture these pipes. The diameter of HDPE/PP Krah spiral pipe is from DN/ID300mm to DN/ID 4000mm. The ring stiffness is SN2, SN4, SN8, SN16 or according to customer requirements.
Pipe Weight
Pipe Weight
The low weight of Krah spiral pipe allows a simpler and faster installation of the pipes, as in most cases no heavy machinery is necessary for the installation and handling of them.
Flexibility
Flexibility
Flexible pipes absorb external loads by deformation. Due to its flexibility the piping can also be bent to a certain extent so that some fittings needed for rigid systems can be saved.
Effective Roughness
Effective Roughness
Due to its low roughness there is almost no accumulation on the pipe bottom and low roughness has an economic advantage as maintenance expenditure is kept to a minimum.
Abrasion Resistant
Abrasion Resistant
Polyethylene pipes are among the most abrasion resistant pipes. This has been tested in the Darmstadt procedure.
Jointing
Jointing
Krah spiral pipe do not require large butt welding machines as they are joined either by rubber ring joint or electro-fusion.
Transportation
Transportation
As it is possible to nest these profile spiral pipes, transportation costs can be reduced.
Long life time
Krah pipes is of low investment costs and a service life over 100 years reduce the operating costs due to the material and special E-fusion joint.
Earthquake resistance
Due to the flexibility of the Krah pipes, it allows deformation without leakage or breaks, even in areas, which are highly affected by earthquakes.
Corrosion Resistance
Profiled pipe and fittings are made of the same material and jointed to one homogenous piece and they are joined by a rubber ring or electro-fusion water tight joint.
UV-Resistant
Black polyethylene sprial pipes are permanently resistant to atmospheric corrosion and UV radiation, as the polyethylene used contains carbon black which acts as both a pigment and an ultra violet stabiliser.
Resistant to Micro Organisms
Polyethylene is not nutrient media for bacteria, fungi and spores, so that the material is resistant to all forms of microbial attack as well as both sulphureous acid and sulphates.
Installation
The installation time is faster than other materials as the standard pipe lengths are between 5.5 to 6 meters long. Fewer lifts mean unloading and loading the pipes into position saves even more time.
