Pre Insulated Pipe Standard HDPE Winding Structure-Wall Pipe

PRODUCT DESCRIPTION

Typical type-B structure-wall pipe as per GB/T194722-2004Buried polyethylene(PE)structure-wall piping system -Part 2:PE winding structure-wall pipe 
Typical bell-and-spigot electric fusion jointing, elastic sealing ring connection, and throttle-type bell-and-spigot connection are used to avoid leakage
HDPE pipe with spirally enwound structured wal an extra-large-diameter high-end buried water drainage pipe, is a new kind of safe and green pipe It is a type of profiled structure-wall flexible tubing which has a smooth inner wall, a spiral stiffening b as its outer wall, and rib interface is manufa tured via O-type spiral winding technology It is once-molded by winding with high-density polyethylene
(as shown)in hot melt state. Before demoulding in hot state, it is rolled and cooled in air to allow gradual heat dissipation. The wall thickness is uniform Pipe connection may be a bell-and-spigot electric fusion jointing and a flexible seal ring connection, and throttle-type bell-and-spigot connection. For bell-and-spigot electric fusion jointing, both ends of pipe are processed to bell ind spigot type respectively during product. Electric fuse is embedded into the middle section of inner wall of bell end. When the pipe is connected, energizing is the only process for installation, and zero leakage can be realized for the pipe network system, For elastic sealing ring connectionand throttle-type bell-and-spigot connection. it overcomes the construction difficulty which hinder the electric fusion jointing or heat fusion jointing operation, such as high underground water level, and inflammable and explosive pipelines at the construction It th ds the scope of application for the product, and meets the needs for more customers As it is safe, reliable, environmental-friendly, the product has been widely used in fields such as nuclear power and thermal power plant, petrochemical industry, metallurgy,transportation hub and municipal works, and has also been extensively applied globally for a long time In China, it has been rated as a key promotional product by Ministry of Construction, and is a new type of high quality product in the national promotion of substitution of steel by plastic, substitution of cement by plastic" for urban rain sewerage system
TECHNICAL STANDARDS
The production and construction shall be in strict accordance with CHINESE STANDARDS  AND NATIONAL STANDARDS
· ISO 21138-2020          Plastics piping systems for non-pressure underground drainage and sewerage
· GB/T 19472-2019       Polyethylene structure-wall piping system for underground usage
· DIN 16961-2018         Thermoplastics pipes and fittings with profiled outer and smooth inner surfaces
· BS EN 13476-2007    plastics piping systems for non-pressure underground drainage and sewerage
 

PRODUCT SRECIFICATIONS

Ring Stiffness Class
Up to 20KN/m²
Customizable
Thickness of earth-fill cover is up to 20m

Presuure Level
Gravity flow
0.2MPa,top to 0.4MPa
 

PRODUCTION PROCESS

The buried reinforced HDPE pipe wrapped with HDPE has been developed and produced by Newchoice Pipe through processing imported raw materials exclusively for high-density polythene(HDPE)pipes with introduced internationally-leading production equipment, advanced large-diameter pipe making techniques and the technology of molding by thermal-insulated winding of external pipe walls with reinforced frame tubes. The R&D and production departments keep technical innovation and technological improvement in practice and have obtained new product technology patents one after another. Advancement of production equipment and continuous improvement and innovation of technology &techniques are a guarantee for excellent technical performance of products.
Polyethylene is heated and molten in main extruder(1)co-extruder(2)A black strap is formed at co-extruder a protective casing is formed at main extruder(4). The strap are winded on a pipe to constitute its wall, whilst supporting tubes and protective casing are attached to the strap-type internal wall to make external structure of the pipe With modification of molds and production procedures, the pipes with various kinds of external structures and wall thicknesses can be achieved
QUALITY INSPECTION

Newchoice pipe always persists in the principle of quality-based operation. It has advanced inspection and test devices, instruments and a complete inspection and test system. No matter for raw materials and production process flow or product performance indicators, international and national supreme standards are followed in regard of inspection and test to ensure good performance of each pipe product
Raw Material Inspection and Test

Arrival of raw material at factory-Visual inspection before delivery to warehouse Performance test by Quality Inspection Department- Labeling and delivery to warehouse
To ensure the quality of raw materials, we measure the density and moisture of them in strict accordance with relevant inspection procedures and control every part of quality process

Product Inspection and Test

Mixing-first article assurance -batch production -self-inspection-special inspection warehouse-in inspection -warehouse-out inspection -statistic analysis and improvement.
To ensure good quality of every pipe from factory, the appearance, specifications, dimensions, ring stiffness and ring flexibility of products are inspected

OUR ADVANTAGES

Sealing for Zero Leakage
HDPE winding structure-wall pipe employs bell-and-spigot connection, by which means the ends of both pipes connected are totally fused (fusing surface length 2 6cm)for absolute sealing that assures zero leakage at the connection


Ductility and Flexibility
HDPE pipe is a high-ductility pipe. Its elongation at break exceeds 500%. Due to strong adaptability to non-uniform settlement and misplacement of pipe foundation and good seismic resistance, it is deemed as the most suitable for earthquake-prone areas It is well proven in the world that HDPE pipe has the best seismic resistance among all pipes. It was reported that only HDPE pipes and water supply pipes survived dwning 1995 Kobe earthquake in Japan.
The flexibility of HdPE pipes enables them to be coiled, especially for those with small diameter, thus reducing a lot of pipe fitting Depending on construction requirements, it is easy to change the route of HDPE pipe. During construction, an obstacle can be avoided in allowable bending radius of pipe and hence decreasing construction difficulty.
It shows excellent performance in installation. The pipe is connected by embedding the same material as electric fuse in the bell end. The bell-and-spigot electric fusion jointing technology provides high connection quality.

Ring Flexibility
Plastic pipe is flexible pipe. The load-bearing mechanism under external load is totally different between flexible and rigid pipe Before compression failure, flexible pipe may suffer large deformation, but this is impossible for rigid pipe. When external load is applied on a rigid pipe, the load is completely transmitted through pipe wall to the pipe bed at the bottom to generate bending moment in pipe wall. Since the bending moment and stress exerted on pipe wall increases sharply with larger pipe diameter, concrete water drainage pipes with large diameter often need addition of reinforcements. A flexible pipe deforms, in the manner of lateral expansion, before compression failure. The backfill around the flexible pipe can suppress such deformation
(external expansion), that is to say, external load is transmitted and distributed to the backfill around. Consequently, the stress applied in the wall of the flexible pipe under the same external load is smaller, and the flexible pipe and the backfill around it act together to bear load, which is called pipe-soil interaction. It is concluded that it is not necessary for plastic buried drainage pipe to have the same strength and stiffness as rigid concrete pipe and that a plastic pipe can fully meet use requirements when it has reasonable stiffness. This point has been demonstrated by developed European countries in application practices.

PERFORMANCE ADVANTAGES

· High Resistance to Corrosion
Due to corrosion-resistant material, the pipe may not suffer corrosion arising from acid, alkali and grease in wastewater and sewage.

· Strong resistance to Impact
The excellent flexibility of polyethylene contributes to the superior resilience in the case of external impact the pipe will not rupture even in the case of foundation settlement; its seismic fortification intensity is as high as level 9.

· High Resistance to Aging
The properties of base materials used for pipes effect an available service life of over 50 years, so the expenses on maintenance are low.

· Resistance to heat and cold
At ambient temperature of -60C, the pipe is not subject to frost-induced breakage or expansioninduced leakage. If the temperature is not higher than 45C, the pipe can keep good performance.

· Light Weight
The weight of the pipe does not exert pressure on the foundation bearing capacity which is sufficient when it reaches 60Kpa.

· Low Construction Cost
Light weight, esay installation, plenty of time and costs can be thus saved.

· Convenient connection
Bell-and-spigot electric fusion jointing, elastic sealing ring connection, and throttle-type bell-and-spigot connection are used for easy and quick connection.

· Resistance to Wearing
Low friction resistivity coefficient of the pipe contributes to strong capacity of medium transmission.

· Unobstructed drainage
Internal smoothness and small friction resistance procures quick drainage of water.

· Freedom from Environmental pollution
Polyethylene is a non-toxic recycling material and will not pollute the environment. The electric fusion joint effects zero leakage and can prevent secondary pollution.

· High Ring Stiffness
The pipe has a good outer pressure resistance and a ring stiffness of above SN20.

· Full Range of specifications
A full family of DN200-DN4000 products can be produced and a fully plastified piping system can be realized.
 

CONSTRUCTION PRINCIPLES

HDPE-wrapped reinforced pipe is flexible pipe. It has significant difference from rigid pipe in design. A rigid pipe is usually considered as an independent load-bearing structure whose strength should be enough to withstand all internal and external loads. However, a flexible pipe is a load-bearing structure system formed by both pipe and fill, that is to say, the pipe under load gains counterforce through deforming in a moderate way while extruding the backfill around it. Due to larger area of action, HDPE-wrapped reinforced pipe which relies on pipe-soil interaction has better load-bearing capacity.
In engineering applications of such pipe, the compactness of the pipe bottom cushion and the compactness of backfill decide the load-carrying capacity of the "pipe-soil" system and the radial deformation ratio of the pipe. To assure safe operation of the project, the backfill is required to reach specified compactness (generally, 95%).
 

CONNECTION TYPE

SOCKEN-AND-SPIGOT ELECTRO-FUSION JOINT
The PE at the contact surface of bell-and -spigot is heated and melted by fusion heat, and its molecules bind together to be integrated The pipes are thus connected after coolin.
The strength of such connection is consistent with pipe strength. It is resistant to root resistance and tension. The bell is integrated with spigot. The operation is simple and convenient.

THROTTLE-TYPE BELL-AND-SPIGOT CONNECTION
According to the patented technology introduced by Newchoice, the bell mouth or socket is provided with an independent annular ring for mechanical engagement; in addition, seal ring is used for the dual sealing design of zero leakage; the construction is so easy that no third-party equipment is needed; the adaptability of pipe to construction conditions is improved since the construction is available in the case of trenches with accumulated water and rainy days.

· CONNECTION TO STEEL FLANGE
Connection to steel flange through loose flange achieves a transition of steel-plastic connection

· CONNECTION TO SUPPORTING HDPE INSPECTION WELL
A short pipe, the diameter of which can be designed according to the model used by the customer, with socket and spigot is prefabricated for the equipment to make a socket-and-spigot electrofusion joint with the pipe at the site.

· CONNECTION TO CONCRETE NSPECTION WELL
Rigid type:cast-in-situ concrete enveloped connection; expansive cement connection at reserved hole of inspection manhole Flexible type:special connection for pipe fittings of inspection manhole transitional connection of flexible joints of two short pipes.

 
COMPANY PROFILE

Fujian Newchoice Pipe Technology Co, Ltd (referred to as Newchoice Pipe") is a leading hi-tech environmental protection group in China. Main business coving environmental-friendly pipe product, clean-energy vehicles, PPP investment and construction and bulk trade, etc, with 21 members enterprises Fujian Newchoice Pipe Industry Technology LLC, a wholly-owned subsidiary of Fujian Newchoice Pipe Technology Co, Ltd founded in 2003, dedicated to R&D, production and sales of environment-friendly, new-type pipes for the comprehensive pipe corridor, urban underground pipe network, water supply and sewage treatment, offer leading comprehensive water supply drainage pipe network solutions necessary for urban construction After over a decade development, Newchoice Pipe Industry has nearly 10 production bases in Fujian, Tianjin, Hubei, iangsu, Shanghai, Guangdong, Sichuan and other places, nearly 50 automated production line. Products comprehensive involved water ecosystem, including HDPE winding reinforced pipes, steel-framed polyethylene(PE) plastic composite pipes, Green environmental protection(PE) solid wall pipe, Glassfiber Reinforced Continuous Winding Pipe, FRP Pipe(Reinforced) and related supporting pipe fittings, etc. The product has been widely used i in the fields of national infrastructure construction such as municipal works, nuclear power and thermal power plant, petrochemical industry and transportation hub, etc. The service network is extended to South Asia, the Middle east, Africa, South America and other 10 overseas countries and regions As a leading company in the same sector, Newchoice adhering to the enterprise spirit of "be honest, be reliable", follows closely the pace of the country'" One Belt and One Road" strategy, continues with innovation and industrial upgrading, provide more quality products and better services both at home and abroad, promoting the sustainable development of human life and ecological environment.


service network
Set up business relationship with Southeast Asia, the Middle East, Africa, Philippines, Indonesia, Burma, Vietnam, Pakistan, Egypt, Chad, Trinidad and Tobago and several countries Set up wholly owned subsidiaries in Quanzhou, Xiamen, Beijing, Shanghai, Tianjin, Wuhan, Siyang, Mianyang, Huizhou, also developed business office in Fuzhou, Guangzhou, Nanchang, Nanjing, Qingdao, Xi 'an and other 20 cities
Newchoice, with the business vision of be an integrated supplier of safe and environmental friendly water supply drainage pipeline keep in step with the national sstrategy, devote g reat efforts to Promoting its development of "sponge cities", infrastructure construction with PPP. Newchoice product line is now covering rainwater harvesting and discharge, rainwater drainage water diversion, distribution and supply, drainage and sewerage, reclaimed water recycling, industrial field

 

APPLICATION FIELD & PROJECT CASE
Thanks to its safety, reliability, environmental friendliness, and high quality, HDPE winding structure-wall pipe is extensively used for such key sectors as municipal engineering, nuclear power stations, thermal power station, petrochemical, mining, metallurgy, transportation hub, port wharf, metallurgy mining, having been well received and recognized by customers and authorities.

Municipal Engineering
Transportation Hub
PPP Project
Overseas Project
Nuclear Power
Thermal Power
Petrochemical
Newchoice has established sound quality control system, altering the business scope from single pipeline products to comprehensive integrated supplier of safe and environmental -friendly water supply &drainage pipeline. Newchoice have set up 10 manufacturing Bases successively it covers in excess of 1500 Mu. Newchoice product line is now covering rainwater harvesting and discharge, rainwater drainage water diversion, distributionand supply, drainage and sewerage, reclaimed water recycling, industrial fiel.

AFTER-SALES SERVICE
Newchoice focus on customer needs, all from the customer needs to meet customer needs and exceed customer expectations for service objectives.
Engineer team provide the full service, promise to offer technical service for full product life (50 years under normal service conditions)
 
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