Steel Reinforced Corrugated Pipe

Introduction

Obsolete and inadequate sewer pipes, intense rainfalls, and frequent landslides require innovative solutions for the disposal of large quantities of storm water. Sewage pipelines nowadays, have to bear all internal and external stresses that are potentially damaging the sewage systems. Japan was the first country, that came up with a new technology in the 1990s, to manufacture sewage pipes in large sizes with high mechanical strength and low weight to solve their problem .As a result, the transportation and installation process have became a lot more convenient. The Rothen Plast production group in Iran, is now manufacturing polyethylene sewage pipes with great advantages such as resistant against abrasion, corrosion, and chemical fluids, light weighted, quick and easy installation with the properties of steel. The spiral corrugated polyethylene pipes of Rothen Plast, are made of polyethylene materials and a layer of steel profile. In other words, these pipes contain an inner layer in polyethylene, an outer structured wall in polyethylene and a core of galvanized steel covered by a polyethylene-based primer, which ensures a perfect blending with the two walls. The combination of these two materials, along with the use of an omega-shaped profile, ensures a performance that is by far better than other type of pipes such as fiber glass, concrete, and cast iron available on the market.

The presence of the steel has several advantages: higher resistance against pressure (up to 20 kN/m2), smaller thickness of outer layer, which reduces the amount of raw materials in production, and better long term performance. Rothen Plast manufactures the spiral corrugated pipes in different diameters from 600mm to 2400mm, to represent the best solution to business and technical needs of designers, project managers, and construction companies.

Specification

Rothen Plast manufactures the HDPE spiral pipe with galvanized steel reinforcement suitable for sewage systems, drainage systems, and ventilation ducts, in accordance with ISIRI 18781 and ASTM-F 2435 standards. The inner surface of these pipes is smooth, and the outer layer is in corrugated shape, reinforced with galvanized steel. The welding process for these pipes is with Electrofusion method.

Ring stiffness classes according to EN ISO 9969: 2008:

Class A (= 8 kN/m2) corresponding to SN8

Class B (= 12 kN/m2) corresponding to SN12

Class C (= 16 kN/m2) corresponding to SN16

NORMS- ISIRI 18781

In 2015, Iranian National Standards Organization issued ISIRI 18781 standard which applies to PE spiral pipes reinforced with a steel profile completely embedded between pipe walls. These pipes have a smooth inner surface with a diameter (DN/ID) from 600mm to 2400mm and are used for sewage systems, drainage systems and ventilation ducts. Taking into account the features of an innovative product, the Rothen Plast group used the following references: American standard ASTM ( American Standard Testing Materials) F 2435-07; Iranian National Standard ISIRI 18781; German DIN 16961; European EN 13476 standard. European standards which arfe known as EN standards, were used as testing methods.

Marking

The pipes of Rothen Plast are marked with ISIRI 18781 standard.

Marking includes the following information:

Number of standard reference

Manufacturer brand and/or brand

Nominal dimension (inside)

Pipe class Example: A (= SN8)

Material

Date of production

Marking is an essential element to enhance product traceability required by ISO 9001:2000 standard.

Non-marked pipes are not compliant with any standard.

Certificates

The PE pipes reinforced with steel, are being used widely for various projects in the USA, Canada, Japan, Europe, Russia, China, and France for over a decade. The pipes of Rothen Plast are manufactured in accordance with the technical requirements of ISIRI 18781 and ASTM F2435-15 standards .

Download Standard Specification

Dimensional Table

Pipe form 6 to 12 M long are available upon customer’s request.

Weight of the pipe

The particular and innovative structure of polyethylene pipe produced by Rothen Plast, is reinforced with an omega shape profile made of galvanized steel which is entirely embedded between two polyethylene layers. By this design, the pipe will be lighter in weight and more stronger than similar types of pipes with high ring stiffness. The average weight of a spiral pipe DN/DI 1200 SN8 is 70 kg/m. on the other hand, the weight of an traditional polyethylene spiral pipe is about 120 kg/m and a concrete pipe is more than 1900 kg/m.The light weight of Rothen Plast pipes does not affect the ring stiffness and ensures the following advantages:

Affordable prices
Quick and easy installation
Lower transportation cost due to ability of storing smaller pipes with lower diameter within larger pipes
No expensive equipment is needed for installation process

Ring stiffness

The ring stiffness of these pipes is in accordance with EN 476 ( 1997 ) standards. This indicates the resistance of the pipe against vertical deformation due to external pressure .

S : ring stiffness [KN/m2]

E : modulus of elasticity with transversal bending [ kN/m2 ]

I : longitudinal inertial moment of the pipe wall, cross section for every unit [m4/m]; the value is equivalent to the ratio I = s3/12

where s is equivalent to pipe thickness

D : neutral pipe wall diameter [m].

The vertical deformation of the pipe depends on the type and volume of the soil surrounding the pipe too. The ring stiffness may be determined using the method reported in EN ISO 9969 (2007) standard.

Junction System

One of the most relevant factors to determine the quality of a pipeline is the ability to convey fluids and preventing potential damaging leaks in the junction system. Therefore, the junction between pipes is a crucial issue, especially in those projects that require involving pipes with high internal diameter (e.g. DN > 1000mm) and where groundwater flows, affects the working environment . Although, they are mainly non-pressure sewage systems and drains, it is necessary that the junction system proposed by the manufacturer, ensures efficiency and long-term performance. The junction between the pipes is made by Extruder and Electrofusion welding, and the fittings are in corrugated shape with a smooth inner surface. This manufacturing method ensures a higher ring stiffness and increases the resistance of the product in the most critical sections of the pipeline which is the junction. Before installation of the fittings, the pipe must reach ambient temperature.

The junction system of Rothen Plast ensures an easy and cheap laying with better safety. The “male” and “female” components are manufactured in a special method that makes the laying and adjusting process much easier by using ordinary equipment and tools. The installation cost of these pipes is quite low due to convenient assembling. It is possible, upon request, to connect Rothen Plast pipes by heat shrink method on the outer layer of the pipes, and then the inner layer of the pipes can be welded by extrude welding. The junction system of Rothen Plast ensures the sealing of the system. These pipes are available in 6m, 9m, and 12m in length.

Physical/mechanical characteristics of materials

Rothen Plasts pipes are a combination of typical properties of polyethylene such as resistance against abrasion, light weight, minimum frictional resistance, resistance against chemical fluids, quick and easy installation; with the properties of steel, featuring an elastic modulus 200 times higher than the polyethylene. The resistance of reinforced spiral corrugated pipes, and the polyethylene pipes against the chemical materials, is in accordance with ISO TR 10358.

Abrasion

The inner layer of Rothen Plasts pipe is made of polyethylene which ensures a high resistance against abrasion. Therefore, this pipe is a great choice to be used in the pipelines with high speed flow and slope environment (max speed up to 10 m/s) without producing relevant abrasion effects on the inner surface. The diagram shows how polyethylene pipes are more resistant against abrasion than other pipes made of other materials (concrete, fiber glass,clay, PVC, etc.)

Resistance to UV rays

The outside black wall of this pipe is resistant against damages caused by environmental factors and UV radiation, due to the carbon black added to the polymer. Therefore, the Rothen Plast pipes can be kept in the outdoors.

Accessories

Upon request, Rothen Plast is able to supply a complete range of products for every required diameter and ring stiffness, such as: elbows, tees, manholes, and etc. The pipes manufactured at Rothen Plast can get connected with other similar pipes (HDPE corrugated pipes, HDPE pipes, PVC pipes, etc.) by their special fittings.

Transportation and relocation

The reinforced spiral corrugated pipes must be handled according to the requirements generally observed with traditional pipes. Rothen Plast pipes can be stacked up without any problem thanks to their light weight and high ring stiffness. Loading, transporting, unloading, and all related operations must be carried out with great care, by using means and devices appropriate to the type of pipes, and taking all the safety measures in order to avoid breakage, cracks, and damages. The pipes should be stored in a flat and safe area. The first row of the pipes that is placed on the ground must be arranged to avoid possible damages to the outer surface, such as bending and deformation.

Stacked pipes must be protected with appropriate wedges in order to prevent sudden falls.

The spiral double-wall corrugated pipes, have a high ring stiffness due to their design. The HDPE-PP raw materials are more resistant against chemicals compared to all the plastic materials. Therefore, Rothen Plast offers corrugated pipe as the best choice in terms of resistant against chemicals. The studies show that corrosion in metal and concrete sewer pipes, are more than pipes made of polymer. Corrugated and spiral pipes are resistant against acids and bases. These pipes are not conductive and due to their weight, they are suitable for telescopic transmission (pipe in pipe) and also, they are optimized and convenient in terms of cost and installation time. Therefore, corrugated pipes, unlike concrete and metal pipes , do not need heavy equipment and high expenses to get installed. Corrugated pipes, compared to concrete and metal pipes are about 30 times lighter and they are recommended to be used in sewage systems as the best

option for longevity and cost-effectiveness

A : Base fill

base of the ditch should be compact sand for AH should be minimum 150 mm for easy installation.

B : side fill

After the installation of the pipes by centering over the base fills are prepared out of compact ground cleared of keen and sharp particles

C : Upper fill

after completing the side fill the ditch is filled with the soil closed

CH should be minimum 500 mm extracted from the channel and closed CH should be minimum 500 mm.

SPR pipes

LARGE DIAMETER TRENCHLESS PIPE RENEWAL

The SPR trench-less method is the best choice for pipeline renewal process and rehabilitation of large diameter pipelines up to 5000mm. SPR utilizes steel reinforced interlocking PVC profile strips grouted in place with a high compressive strengths grout. The installation equipment can be used through standard access points with no need with no need for excavation. The Japanese SPR technology can also be installed in vertical applications such as water wells, access shafts, and other large diameter structures. The SPR process is unique in providing a customized structural solution to eroding pipelines. This method can also be used to fix hydraulic anomalies as well as restoring the slope of the original pipe by appropriate engineering.

SPR pipes have been examined in accordance with Industry standards for spiral and PVC Profiled-wall pipes ASTM F 1697 and ASTM F 1741. Furthermore, the PVC profile of SPR contains Manning’s n of 0.01

INSTALLATION PROCESS – MINIMAL IMPACT ON THE ENVIRONMENT

The installation process of SPR pipe can be divided in the following steps:

Inspection and cleaning of host pipe 2. Wound lining
Installation of bracing system 4. Grouting

Inspection

Prior to the SPR wound lining, the host pipe gets inspected via camera and all incrustation and debris should be removed by hydraulic jet cleaning.

SPR wound lining

The SPR profile gets fed through the manhole into the winding machine placed in the existing pipe. Due to the forward motion, the winding machine moves to the next access chamber. For longer rehabilitation sections, the profile gets cut off at the intermediate shaft and the winding machine should be installed behind it to continue the winding process.

Bracing system

After the winding process is completed, the bracing system will be installed. The bracing material gets lowered through standard manhole openings. In the next step, the bracing system gets set up to provide structural support during the grouting process and positions the SPR profile in the existing pipe according to engineering specifications.

Grouting

The grouting process is injection of grouting material into annular space between existing pipe and wounded PVC profile. The pipe will be ready to use after this stage.

Benefits of SPR at a glance

Rehabilitation of large diameter pipes (800-5000 mm)
Rehabilitation of circular, non-circular and custom shapes
Truly trench-less – requires only standard manhole entry
Designed for installation in live flow conditions
can be installed in curves and bends
Improved flow with smooth PVC material (Manning’s n of 0.01)
Environmental – friendly installation and application
Over 400 km successfully installed world-wide

SPR PE

THE HDPE REINFORCED PIPE FOR GRAVITATIONAL PIPELINE

The SPR PE pipe is a great choice to restore and rehabilitate the hydraulic efficiency, reliability, and integrity of old sewage systems, drainage systems, and culverts. The fully encapsulated steel reinforcement, is designed to provide a liner of optimum stiffness. The SPR PE pipes can structurally rehabilitate brick, concrete, glass reinforced plastic, corrugated metal sanitary sewer and storm-water pipelines with diameters from 900mm to 3000mm. The plastic profile that forms the pipe is provided in a range of sizes. The profile is reinforced with steel that is completely encapsulated within the HDPE material. The steel reinforcement is selected to provide a pipe with sufficient stiffness to meet the requirements of the project.

Project experiences

SPR PE has been used to rehabilitate sewage system, storm-water lines, and culverts around the world . It has been proven capable of providing a structural pipeline for severely deteriorated pipelines. Also, it is capable of getting installed under difficult site conditions with minimal community disruption.

Easy mechanical installation

At first, the deteriorated pipeline gets cleared of debris and obstructions, cleaned and inspected. Then, the diameter gets measured and approved. After this stage, the winding machine gets lowered to the base of the access chamber through the standard manhole openings, and the reinforced HDPE profile gets fed into the machine form an above ground spool. The winding machine then starts the wound lining process and forms the reinforced HDPE into a new pipe. The process continue until the liner wounded by the winding machine reaches the end of the pipeline. The end of the liner at both access chambers gets sealed and rendered.

The annulus between the fixed diameter liner and the host pipe can be filled with grout immediately after the winding is completed.

Proven pipe material

Made from similar grade of HDPE as new sewage and drainage pipes
Cell Classification of 33540C(or E)in accordance with ASTM D 3350
Profile sealing is achieved by extrusion welding to produce a continuous joint-less HDPE liner
Consistent material properties. The strength of the pipe does not rely upon the grout.

Design

Numerous industry specifications provide design methods applicable to SPR PE, including :

ASTM F 1741: “ Standard method for installation of winding machine is available. This standard has been modified for SPR PE (HDPE) pipe.

The best solution in whole world

The modern urban life would be utterly impossible without underground infrastructure. Furthermore, it is becoming apparent that underground infrastructure system in the whole world, is substantially deteriorating as a result of age and increase in traffic loads. Additionally, the demand for sustainable and environmentally-friendly urban development is rising and this can pose a great challenge to local authorities. SEKISUI SPR, offers the best solution to these demands. The Trenchless technology has made the renovating the underground infrastructure a lot more simple and affordable, by rehabilitating and improving the existing system. This method, eliminates the protracted construction and modification of the cityscape. It also makes the expand and maintenance of the existing infrastructure system possible without excavation. The Trenchless technology, guarantees a much quicker, cost-effective, and environmentally-friendly solution, instead of replacing the system. SEKISUI SPR, employs the world’s best technical and operational infrastructure specialists, therefore, they can offer the best solution for all requirements from planning to construction. SEKISUI SPR operates in three divisions in order to answer to the needs of the customers; Sales and support, Trenchless Infrastructure Solutions, and construction. This provides a global interchange of experience for all experts to devise the optimum infrastructure solution for the projects. SEKISUI SPR brings together the competence of the SEKISUI Chemical Corporation (Osake). This is already represented in over 40 countries around the world.

Reinforced spiral corrugated pipe

Reinforced Spiral Double wall Corrugated Pipe 1000 mm

The Rothen Plast manufacturer is the first and the greatest producer of Reinforced Spiral Corrugated Pipes, with an internal diameter of 1000mm and outside diameter of 1125mm, with PE 80 and PE100 grade of materials. The thickness of the inner layer of these pipes is 9mm and their ring resistance is 400kPa. These pipes can be produced at 6m, 9m and 12m in length.

The type of the sheets used in 1000mm reinforced spiral corrugated pipes, are ST12 oily sheet and Z20 galvanized with thickness of 1mm.

The 1000mm reinforced spiral corrugated pipe is being used in drainage system, collecting industrial and urban sewage.

The reinforced spiral corrugated pipe is a 5 layered polyethylene pipe that has been strengthened with metal. These 5 layers are:

Two layers of polyethylene glue, Black polyethylene layer, Oily or galvanized ST12 metal, and, The inner yellow layer in thickness of 1cm.

The reinforced spiral corrugated pipe has a high ring stiffness and it is really resistant against ground vibrations.

The reinforced spiral corrugated pipe are being used in transferring rainwater, drainage system, urban and industrial sewage system. These pipes can be produced in two sizes of 6m and 12m in length.

High Ring Stiffness

The highest ring resistance of sewage pipes with plastic wall, is 8 SN. On the other hand, the polyethylene double-wall reinforced spiral corrugated pipe which is reinforced with steel, can easily provide 8 SN, 12.5 SN, 16 SN and even more if needed. In other words, this reinforced pipe can easily resist against corrosion because of its composite texture (steel and plastic).

The Rothen Plast’s 1000mm reinforced spiral corrugated pipe, has the certificate of 18781 Iran’s national standard, and also its being manufactured according to ASTM-F2435.

The technical information of 1000mm reinforced spiral corrugated pipe:

Internal diameter: 1000mm 1020mm = -/+ 0.02

Outside diameter: 1125mm

Type of raw material: Polyethylene PE80-PE100

Type of the sheet: Z20 or ST12

Thickness of steel sheet: 1mm-1.2mm

Width of steel sheet: 124.5

Thickness of yellow layer: 5mm

Thickness of black layer: 3mm

Thickness of black and yellow layers: 8mm

The gap between two crests: 150mm

Ring stiffness: 400kPa

Reinforced Spiral Double wall Corrugated Pipe 1200 mm

The Reinforced Spiral double-wall Corrugated Pipes, with an internal diameter of 1200mm and outside diameter of 1325mm, is reinforced according to 18781 Iran’s national standard, with ST12 steel sheet with 1mm of thickness. The thickness of the inner layer is 9mm and the ring stiffness of these pipes is 420kPa. These pipes are being used in civil, industrial, and agricultural projects.

Rothen Plast is one of the biggest producers of the Reinforced Spiral Corrugated Pipes in Iran, and has the capability of manufacturing the Reinforced double-wall Pipes, in different diameters up to 2400mm with minimum ring stiffness of 420 kPa.

The type of the sheets used in 1200mm reinforced spiral corrugated pipes, are ST12 oily sheet and Z20 galvanized with thickness of 1mm.

The 1200mm reinforced spiral corrugated pipe is being used in drainage system, collecting industrial and urban sewage.

The reinforced spiral corrugated pipe is a 5 layered polyethylene pipe that has been strengthened with metal. These 5 layers are:

Two layers of polyethylene glue, Black polyethylene layer, Oily or galvanized ST12 metal, and, The inner yellow layer in thickness of 1cm.

The reinforced spiral corrugated pipe has a high ring stiffness and it is really resistant against ground vibrations.

The reinforced spiral corrugated pipe are being used in ventilation system, transferring rainwater, drainage system, urban and industrial sewage system. These pipes can be produced in two sizes of 6m and 12m in length.

The spiral corrugated pipe is in five layers of polyethylene and metal, reinforced with ST12 and Z20 type of steel, with minimum ring stiffness of 420kPa up to 900kPa according to type of sheet and thickness.

The technical information of 1200mm reinforced spiral corrugated pipe:

Internal diameter: 1200mm 1224mm = -/+ 0.02

Outside diameter: 1325mm

Type of raw material: Polyethylene PE100

Type of the sheet: Z20 or ST12

Thickness of steel sheet: 1mm-1.2mm

Width of steel sheet: 154.5

Thickness of yellow layer: 5mm

Thickness of black layer: 3mm

Thickness of black and yellow layers: 8mm

The gap between two crests: 180mm

Ring stiffness: 400kPa

Reinforced Spiral Double wall Corrugated Pipe 1400 mm

The 1400mm Reinforced Spiral Double-wall Corrugated Pipe, with ring stiffness of 400kPa (64kN), in accordance with 18781 Iran’s national standards and ASTM-F2435 standards, is being used in sewage system, drainage of rainwater and ventilation system.

The reinforced Spiral, double-wall corrugated pipe, with an internal diameter of 1400mm and outside diameter of 1530mm, with ST12 steel sheet with 1.2mm of thickness. The thickness of the inner layer is 11mm.

The 1400mm Reinforced Spiral Corrugated Pipe, is being used in drainage system, urban and industrial sewage system, bridges and highways.

The ring stiffness of reinforced spiral, double-wall corrugated pipe, is in accordance with EN 476 which demonstrates, that the pipe is resistant against deformation caused by outside pressure.

The type of the sheets used in 1400mm reinforced spiral corrugated pipes, are ST12 oily sheet and Z20 galvanized with thickness of 1mm.

The reinforced spiral corrugated pipe is a 5 layered polyethylene pipe that has been strengthened with metal. These 5 layers are:

Two layers of polyethylene glue, Black polyethylene layer, Oily or galvanized ST12 metal, and, The inner yellow layer in thickness of 1cm.

These pipes can be produced in two sizes of 6m and 12m in length.

The highest ring resistance of sewage pipes with plastic wall, is 8 SN. On the other hand, the polyethylene double-wall reinforced spiral corrugated pipe which is reinforced with steel, can easily provide 8 SN, 12.5 SN, 16 SN and even more if needed. In other words, this reinforced pipe can easily resist against corrosion because of its composite texture (steel and plastic).

The Rothen Plast’s reinforced spiral corrugated pipes, which are strengthened with steel, have a lot of advantages compared to similar pipes.

These lightweight pipes have a high ring stiffness, and are resistant against corrosion, acids and bases.

The connecting and welding process of reinforced spiral corrugated pipes is butt welding and extrusion welding.

The reinforced spiral corrugated pipes can be welded with Electrofusion welding method with polyethylene strap made of nickel and chrome mesh.

The technical information of 1400mm reinforced spiral corrugated pipe:

Internal diameter: 1400mm 1428mm = -/+ 0.02

Outside diameter: 1530mm

Type of raw material: Polyethylene PE100

Type of the sheet: Z20 or ST12

Thickness of steel sheet: 1.2mm

Width of steel sheet: 154.5

Thickness of yellow layer: 5mm

Thickness of black layer: 3mm

Thickness of black and yellow layers: 8mm

The gap between two crests: 210mm

Ring stiffness: 400kPa

Reinforced Spiral Double wall Corrugated Pipe 1500 mm

The 1500mm Reinforced Spiral Double-wall Corrugated Pipe, with ring stiffness of 400kPa (64kN), in accordance with 18781 Iran’s national standards and ASTM-F2435 standards, is being used in sewage system, drainage of rainwater and ventilation system.

The ring stiffness of reinforced spiral, double-wall corrugated pipe, is in accordance with EN 476 which demonstrates, that the pipe is resistant against deformation caused by outside pressure.

The type of the sheets used in 1400mm reinforced spiral corrugated pipes, are ST12 oily sheet and Z20 galvanized with thickness of 1mm.

The 1500mm Reinforced Spiral Corrugated Pipe, is being used in transferring rainwater, drainage system, urban and industrial sewage system, bridges and highways.

The reinforced spiral corrugated pipe is a 5 layered polyethylene pipe that has been strengthened with metal. These 5 layers are:

Two layers of polyethylene glue, Black polyethylene layer, Oily or galvanized ST12 metal, and, The inner yellow layer in thickness of 1cm.

The reinforced spiral corrugated pipe has a high ring stiffness and it is really resistant against ground vibrations.

These pipes can be produced in two sizes of 6m and 12m in length.

The highest ring resistance of sewage pipes with plastic wall, is 8 SN. On the other hand, the polyethylene double-wall reinforced spiral corrugated pipe which is reinforced with steel, can easily provide 8 SN, 12.5 SN, 16 SN and even more if needed. In other words, this reinforced pipe can easily resist against corrosion because of its composite texture (steel and plastic).

The reinforced spiral corrugated pipes are being used in ventilation system and transferring rainwater.

Reinforced Spiral Double wall Corrugated Pipe 1600 mm

The 1600mm Reinforced Spiral Double-wall Corrugated Pipe, with steel strip of ST 12 material, has a ring stiffness of 420 kPa.

The 1600mm Reinforced Spiral Double-wall Corrugated Pipe, can be produced in three sizes of 6m, 9m and 12m in length, in accordance with 18781 Iran’s national standards and ASTM-F2435 standards. This pipe has a lot of advantages compared to similar pipes such as fiberglass reinforced concrete pipe. Very high resistance, lower in price, favorable in shipping expenses, and flexibility are major properties of this pipe.

The reinforced Spiral corrugated pipe, with an internal diameter of 1600mm and outside diameter of 1740mm, with the thickness of 11mm of the inner layer, is being used in the agricultural water system, drainage system, urban and industrial sewage system, transferring rainwater, bridges and highways.

The ring stiffness of reinforced spiral corrugated pipe, is in accordance with EN 476 which demonstrates, that the pipe is resistant against deformation caused by outside pressure.

The type of the sheets used in 1400mm reinforced spiral corrugated pipes, are ST12 oily sheet and Z20 galvanized with thickness of 1mm.

The reinforced spiral corrugated pipe has a high ring stiffness and it is really resistant against ground vibrations.

The technical information of 1600mm reinforced spiral corrugated pipe:

Internal diameter: 1600mm 1632mm = -/+ 0.02

Outside diameter: 1740mm

Type of raw material: Polyethylene PE100

Type of the sheet: Z20 or ST12

Thickness of steel sheet: 1.2mm

Width of steel sheet: 182

Thickness of yellow layer: 5mm

Thickness of black layer: 3mm

Thickness of black and yellow layers: 8mm

The gap between two crests: 230mm

Ring stiffness: 400kPa

The reinforced spiral corrugated pipes are being used in ventilation system and transferring rainwater.

The reinforced Spiral corrugated pipe, with an internal diameter of 1800mm and outside diameter of 1960mm made of HDPE material (High-density polyethylene) in PE80-PE100 grade, with steel strip inserted inside of the pipe, is being used in drainage, sewage and ventilation systems.

The 1800mm Reinforced Spiral Corrugated Pipe, with 12mm of crustal thickness, strengthened with ST 12 steel strip that has increased its resistance up to 400 kPa.

Convenient in shipping and installation, and favorable in price, are properties of this type of pipe.

The 1800mm Reinforced Spiral Double-wall Corrugated Pipe, with ring stiffness of 400 kPa (64kN) is in accordance with 18781 Iran’s national standards and ASTM-F2435 standards.

The ring stiffness of reinforced spiral corrugated pipe, is in accordance with EN 476 which demonstrates, that the pipe is resistant against deformation caused by outside pressure.

The type of the sheets used in 1400mm reinforced spiral corrugated pipes, are ST12 oily sheet and Z20 galvanized with thickness of 1mm.

The 1800mm Reinforced Spiral Corrugated Pipe, is being used in the drainage system, ventilation system, urban and industrial sewage system, transferring rainwater, bridges and highways.

The reinforced spiral corrugated pipe is a 5 layered polyethylene pipe that has been strengthened with metal. These 5 layers are:

Two layers of polyethylene glue, Black polyethylene layer, Oily or galvanized ST12 metal, and, The inner yellow layer in thickness of 1cm.

The reinforced spiral corrugated pipe has a high ring stiffness and it is really resistant against ground vibrations.

These pipes can be produced in two sizes of 6m and 12m in length.

The highest ring resistance of sewage pipes with plastic wall, is 8 SN. On the other hand, the polyethylene double-wall reinforced spiral corrugated pipe which is reinforced with steel, can easily provide 8 SN, 12.5 SN, 16 SN and even more if needed. In other words, this reinforced pipe can easily resist against corrosion because of its composite texture (steel and plastic).

The technical information of 1800mm reinforced spiral corrugated pipe:

Internal diameter: 1800mm 1836mm = -/+ 0.02

Outside diameter: 1960mm

Type of raw material: Polyethylene PE100

Type of the sheet: Z20 or ST12

Thickness of steel sheet: 1.5mm

Width of steel sheet: 212.5

Thickness of yellow layer: 5mm

Thickness of black layer: 3.5mm

Thickness of black and yellow layers: 8.5mm

The gap between two crests: 230mm

Ring stiffness: 400kPa

Reinforced Spiral Double wall Corrugated Pipe 2000 mm

The reinforced Spiral corrugated pipe, with an internal diameter of 2000mm and outside diameter of 2185mm is being used in water supply networks, sewage system, drainage system and gravitational water projects.

The type of sheet used in this pipe is ST 12 steel with 1.2mm in thickness and Z 20 galvanized with zinc cover. The ring stiffness of this pipe is 420 kPa.

The extrude welding and electrofusion welding are two methods to connect these pipes.

The two ends of 2000mm reinforced spiral, double-wall pipe, has a special design to make the butt welding process much easier.

This pipe is convenient in shipping and installation, and has a very high ring stiffness.

The technical information of 2000mm reinforced spiral corrugated pipe:

Internal diameter: 2000mm 2040mm = -/+ 0.02

Outside diameter: 2185mm

Type of raw material: Polyethylene PE100

Type of the sheet: Z20 or ST12

Thickness of steel sheet: 1.8mm

Width of steel sheet: 234.5

Thickness of yellow layer: 6.5mm

Thickness of black layer: 3.5mm

Thickness of black and yellow layers: 10mm

The gap between two crests: 235mm

Ring stiffness: 400kPa

Reinforced Spiral Double wall Corrugated Pipe 2200 mm

The 2200mm Reinforced Spiral Double-wall Corrugated Pipe, with 13mm in thickness of the internal polyethylene layer and outside diameter of 2385mm, with ring stiffness of 400 kPa, has reinforced with steel strip of ST 12 material with 1.8mm in thickness. This pipe can be manufactured in three sizes of 6m, 9m and 12m.

The reinforced spiral double-wall corrugated pipe, with high density polyethylene material (HDPE), can be manufactured in two grades of PE80 and PE100.

Rothen Plast is one of the largest manufacturers, that is producing reinforced spiral double-wall corrugated pipes exclusively in Iran.

This pipe can be welded and sealed with two different methods of extrude and electrofusion.

The advantages of this pipe are high quality, light weight, high ring stiffness, and high endurance.

You can call the sales department of the company regarding the prices of these pipes.

The 2200mm Reinforced Spiral Double-wall Corrugated Pipe, with ring stiffness of 420 kPa (64kN) is in accordance with 18781 Iran’s national standards and ASTM-F2435 standards. This pipe is being used in sewage system, drainage of rainwater, and ventilation system.

The ring stiffness of reinforced spiral corrugated pipe, is in accordance with EN 476 which demonstrates, that the pipe is resistant against deformation caused by outside pressure.

The type of the sheets used in 2200mm reinforced spiral corrugated pipes, are ST12 oily sheet and Z20 galvanized with thickness of 1mm.

The 2200mm Reinforced Spiral Corrugated Pipe, is being used in the drainage system, ventilation system, urban and industrial sewage system, transferring rainwater, bridges and highways.

The reinforced spiral corrugated pipe is a 5 layered polyethylene pipe that has been strengthened with metal. These 5 layers are:

Two layers of polyethylene glue, Black polyethylene layer, Oily or galvanized ST12 metal, and, the inner yellow layer in thickness of 1cm.

The technical information of 2200mm reinforced spiral corrugated pipe:

Internal diameter: 2200mm 2244mm = -/+ 0.02

Outside diameter: 2385mm

Type of raw material: Polyethylene PE100

Type of the sheet: Z20 or ST12

Thickness of steel sheet: 1.8mm

Width of steel sheet: 234.5

Thickness of yellow layer: 6.5mm

Thickness of black layer: 3.5mm

Thickness of black and yellow layers: 10mm

The gap between two crests: 235mm

Ring stiffness: 400kPa

Reinforced Spiral Double wall Corrugated Pipe 2400 mm

The 2400mm Reinforced Spiral Double-wall Corrugated Pipe, with outside diameter of 2585mm with ST12 oily sheet and Z20 galvanized is in three different sizes of 6m, 9m, and 12m. These pipes can be connected with two methods of extrude and butt welding.

The Rothen Plast production group is proud that their reinforced spiral double-wall corrugated pipes are being exported to the neighbour countries such as Iraq, Afghanistan, and Turkey. This company produces the reinforced spiral double-wall corrugated pipes from 1000mm up to 2400mm. In addition, this company produces their products with the most modern technology for civil projects and transferring networks.

The 2400mm Reinforced Spiral Double-wall Corrugated Pipe, is made of 5 layers of metal, glue, and polyethylene.

The 2400mm Reinforced Spiral Double-wall Corrugated Pipe, with ring stiffness of 400 kPa (64kN) is in accordance with 18781 Iran’s national standards and ASTM-F2435 standards. This pipe is being used in sewage system, drainage of rainwater, and ventilation system.

The ring stiffness of reinforced spiral corrugated pipe, is in accordance with EN 476 which demonstrates, that the pipe is resistant against deformation caused by outside pressure.

The type of the sheets used in 2400mm reinforced spiral corrugated pipes, are ST12 oily sheet and Z20 galvanized with thickness of 1mm.

The 2400mm Reinforced Spiral Corrugated Pipe, is being used in the drainage system, urban and industrial sewage system, transferring rainwater, ventilation system, bridges and highways.

The reinforced spiral corrugated pipe is a 5 layered polyethylene pipe that has been strengthened with metal. These 5 layers are:

Two layers of polyethylene glue, Black polyethylene layer, Oily or galvanized ST12 metal, and, The inner yellow layer in thickness of 1cm.

The reinforced spiral corrugated pipe has a high ring stiffness and it is really resistant against ground vibrations.

The highest ring resistance of sewage pipes with plastic wall, is 8 SN. On the other hand, the polyethylene double-wall reinforced spiral corrugated pipe which is reinforced with steel, can easily provide 8 SN, 12.5 SN, 16 SN and even more if needed. In other words, this reinforced pipe can easily resist against corrosion because of its composite texture (steel and plastic).

The technical information of 2400mm reinforced spiral corrugated pipe:

Internal diameter: 2400mm 2448mm = -/+ 0.02

Outside diameter: 2585mm

Type of raw material: Polyethylene PE100

Type of the sheet: Z20 or ST12

Thickness of steel sheet: 1.8mm

Width of steel sheet: 234.5

Thickness of yellow layer: 6.5mm

Thickness of black layer: 3.5mm

Thickness of black and yellow layers: 10mm

The gap between two crests: 235mm

Ring stiffness: 400kPa

Spiral Double-wall Corrugated Pipe

The 1000mm Spiral Double-wall Corrugated Pipe, is in accordance with ISIR 9116-3 with ring stiffness of 4SN, 8SN, and 16SN, with PE80 and PE100 material.

The spiral corrugated pipe with internal diameter of 1000mm and outside diameter of 1008mm and 60mm in height of the profile, can be manufactured in two sizes of 6m and 12m.

All the quality examination of the products is happening in the company’s lab with the latest technology in the world.

The 1000mm Spiral Double-wall Corrugated Pipe, with 5mm in thickness of the inner layer, has 1020N of transverse tensile strength.

The raw materials of the pipes of this company are from Shazand, Amirkabir, and Maroon petrochemical and they have the approval stamp of standards.

The spiral corrugated pipe D1000 SN31.5

Type of examination		Standard of examination	Acceptance criteria
Appearance		ISIRI 9116-3	Flawless
Density		ISIRI 7090-1/ISIRI 9116-3	0.941 – 0.965 g/cm³
Melt flow rate(MFR)		ISO 1133 / ISIRI 9116-3	0.15≤ < 0.7 g / 10 min
Ring stiffness(long term)		ISIRI 9116-1 / DIN 16961	KN / m2 31.5≤
Ring stiffness(short term)		ISIRI 11436/ ISO 9969	8 KN / m2≤
Flexibility 30%		ISIRI 12190/ISO13968	No power drop and pipe breakage
Percentage of soot		ISO 6964/ ISIRI 9116-3	2-2.5%
Soot distribution		INSO 20059 / ISIRI 9116-3	Distribution rate A1,A2,A3 or B3 ≥
Oxidation Induction Time(OIT)		ISIRI 9116-3 /ISIRI 7186-6	≥20 min
Heat resistance		ISIRI 9116-3 / ISIRI 17614	No corrosion, crack and bubble on the surface of the pipe
Dimensions	Internal diameter	DIN 16961 / ISIRI 9116-3	995±2 mm
	e_5,min	ISIRI 9116-3	mm 8±1
	Height of profile	ISIRI 9116	95±2mm

The Spiral Double-wall Corrugated Pipe, is one of the different types of double-wall pipes which is in accordance with ISIR 9116-3 in the B row of Iran’s national standards. In terms of technology, these pipes are smooth on their inner layer and wavy on their outer layer and because of the unique design of their profile, they are light in weight compared to their similar type. These pipes are resistant against outside pressure, overloading and the heavy weight of the soil on top of them. And also, because of their flexibility, they are resistant to the ground vibrations. The smooth inner layer of this pipe, reduces the frictional resistance, therefore, it makes the flow process much easier and prevents sedimentation.

The 1200mm Spiral Double-wall Corrugated Pipe, is in accordance with ISIR 9116-3 with ring stiffness of 4SN, 8SN, and 16SN, with PE80 and PE100 material.

The corrugated pipes are double-walled, made of high density profiles (HDPE).

In the production of spiral double-wall corrugated pipe, two extruders are being used for heating the polyethylene to melt and reshape it.

The visual appearance of spiral double-wall corrugated pipe, contains a surface with spiral rings around it like a snail.

All the quality examination of the products is happening in the company’s lab with the latest technology in the world.

The 1200mm Spiral Double-wall Corrugated Pipe, with 5mm in thickness of the inner layer, has 1020N of transverse tensile strength.

The raw materials of the pipes of this company are from Shazand, Amirkabir, and Maroon petrochemical and they have the approval stamp of standards.

The spiral corrugated pipe, has an extensive usage in the industrial sewage system.

The spiral corrugated pipes, are being used in transferring urban sewage and chemical fluids, bridge building projects, transferring seawater to cool down heating boilers, and different chemical industries such as paper making and sugar production.

The spiral corrugated pipes, are in two different sizes of 6m, and 12m. These pipes can be connected with three methods of extrude, electrofusion, and butt welding.

These pipes are in different sizes from 900m to 3000mm, and the inner layer of these pipe are in light color to make video insights and amp metrics easier.

The laboratory of Rothen Plast works with standards organization and it has their approval.

Type of examination		Standard of examination	Acceptance criteria
Appearance		ISIRI 9116-3	Flawless
Density		ISIRI 7090-1/ISIRI 9116-3	0.941 – 0.965 g/cm³
Melt flow rate(MFR)		ISO 1133 / ISIRI 9116-3	0.15≤ < 0.7 g / 10 min
Ring stiffness(long term)		ISIRI 9116-1 / DIN 16961	KN / m2 31.5≤
Ring stiffness(short term)		ISIRI 11436/ ISO 9969	8 KN / m2≤
Flexibility 30%		ISIRI 12190/ISO13968	No power drop and pipe breakage
Percentage of soot		ISO 6964/ ISIRI 9116-3	2-2.5%
Soot distribution		INSO 20059 / ISIRI 9116-3	Distribution rate A1,A2,A3 or B3 ≥
Oxidation Induction Time(OIT)		ISIRI 9116-3 /ISIRI 7186-6	≥20 min
Heat resistance		ISIRI 9116-3 / ISIRI 17614	No corrosion, crack and bubble on the surface of the pipe
	Internal diameter	DIN 16961 / ISIRI 9116-3	1190±5 mm

The 2000mm Polyethylene Spiral Double-wall Corrugated Pipe, is in accordance with ISIR 9116-3 with ring stiffness of 4SN, 8SN, and 16SN, with PE80 and PE100 material.

The corrugated pipes are double-walled, made of high density profiles (HDPE).

In the production process of spiral double-wall corrugated pipe, two extruders are being used for heating the polyethylene to melt and reshape it.

The visual appearance of spiral double-wall corrugated pipe, contains a surface with spiral rings around it like a snail.

All the quality examination of the products is being performed in the company’s lab with the latest technology in the world.

The 2000mm Spiral Double-wall Corrugated Pipe, with 5mm in thickness of the inner layer, has 1020N of transverse tensile strength.

The raw materials of the pipes of this company are from Shazand, Amirkabir, and Maroon petrochemical and they have the approval stamp of standards.

The polyethylene spiral corrugated pipes have appropriate properties.

The polyethylene spiral corrugated pipes can be used in urban and industrial sewage system, transferring acidic, base and salty liquids, water refinery system, drainage of rainwater and for agricultural purposes.

Type of examination		Standard of examination	Acceptance criteria
Appearance		ISIRI 9116-3	Flawless
Density		ISIRI 7090-1/ISIRI 9116-3	0.941 – 0.965 g/cm³
Melt flow rate(MFR)		ISO 1133 / ISIRI 9116-3	0.15≤ < 0.7 g / 10 min
Ring stiffness(long term)		ISIRI 9116-1 / DIN 16961	KN / m2 31.5≤
Ring stiffness(short term)		ISIRI 11436/ ISO 9969	8 KN / m2≤
Flexibility 30%		ISIRI 12190/ISO13968	No power drop and pipe breakage
Percentage of soot		ISO 6964/ ISIRI 9116-3	2-2.5%
Soot distribution		INSO 20059 / ISIRI 9116-3	Distribution rate A1,A2,A3 or B3 ≥
Oxidation Induction Time(OIT)		ISIRI 9116-3 /ISIRI 7186-6	≥20 min
Heat resistance		ISIRI 9116-3 / ISIRI 17614	No corrosion, crack and bubble on the surface of the pipe
Dimensions	Internal diameter	DIN 16961 / ISIRI 9116-3	2000±2 mm
	e_5,min	ISIRI 9116-3	mm 11±0.1
	Height of profile	ISIRI 9116	145±1mm

The 1500mm Spiral Double-wall Corrugated Pipe, is one of the different types of double-wall pipes which is in accordance with ISIR 9116-3 in the B row of Iran’s national standards. In terms of technology, these pipes are smooth on their inner layer and wavy on their outer layer and because of the unique design of their profile, they are light in weight compared to their similar type. These pipes are resistant against outside pressure, overloading and the heavy weight of the soil on top of them. And also, because of their flexibility, they are resistant to the ground vibrations.

The 1500mm Spiral Double-wall Corrugated Pipe, is in accordance with ISIR 9116-3 with ring stiffness of 4SN, 8SN, and 16SN, with PE80 and PE100 material.

The corrugated pipes are double-walled, made of high density profiles (HDPE).

In the production process of 1500mm polyethylene spiral double-wall corrugated pipe, two extruders are being used for heating the polyethylene to melt and reshape it.

The visual appearance of spiral double-wall corrugated pipe, contains a surface with spiral rings around it like a snail.

All the quality examination of the products is being performed in the company’s lab with the latest technology in the world.

The 1500mm Spiral Double-wall Corrugated Pipe, with 5mm in thickness of the inner layer, has 1020N of transverse tensile strength.

The raw materials of the pipes of this company are from Shazand, Amirkabir, and Maroon petrochemical and they have the approval stamp of standards.

The 1600mm Spiral Double-wall Corrugated Pipe, is one of the different types of double-wall pipes which is in accordance with ISIR 9116-3 in the B row of Iran’s national standards. In terms of technology, these pipes are smooth on their inner layer and wavy on their outer layer and because of the unique design of their profile, they are light in weight compared to their similar type. These pipes are resistant against outside pressure, overloading and the heavy weight of the soil on top of them. And also, because of their flexibility, they are resistant to the ground vibrations.

The 1600mm Spiral Double-wall Corrugated Pipe, is in accordance with ISIR 9116-3 with ring stiffness of 4SN, 8SN, and 16SN, with PE80 and PE100 material.

The corrugated pipes are double-walled, made of high density profiles (HDPE).

In the production process of spiral double-wall corrugated pipe, two extruders are being used for heating the polyethylene to melt and reshape it.

The visual appearance of spiral double-wall corrugated pipe, contains a surface with spiral rings around it like a snail.

All the quality examination of the products is being performed in the company’s lab with the latest technology in the world.

The 1600mm Spiral Double-wall Corrugated Pipe, with 5mm in thickness of the inner layer, has 1020N of transverse tensile strength.

The raw materials of the pipes of this company are from Shazand, Amirkabir, and Maroon petrochemical and they have the approval stamp of standards.

The polyethylene spiral corrugated pipes are the best choice in oil and gas industry, to process and transfer needed materials.

Nowadays, the spiral double-wall corrugated pipes are being used for transferring air, urban and industrial sewage system, and drainage system in many parts of the world.

The development of polyethylene pipes in water and sewage network, shows that they are not comparable with similar pips in terms of strength, and they are a great choice for replacement of the old pipes.

A great attention has been paid for the production of the spiral double-wall corrugated pipes, in fact, they get manufactured in accordance with international standards.

The spiral double-wall corrugated pipes of Rothen Plast, are being manufactured in accordance with 19691 Iran’s national standards.

The information of spiral corrugated pipe D1600 SN31.5

Type of examination		Standard of examination	Acceptance criteria
Appearance		ISIRI 9116-3	Flawless
Density		ISIRI 7090-1/ISIRI 9116-3	0.941 – 0.965 g/cm³
Melt flow rate(MFR)		ISO 1133 / ISIRI 9116-3	0.15≤ < 0.7 g / 10 min
Ring stiffness(long term)		ISIRI 9116-1 / DIN 16961	KN / m2 31.5≤
Ring stiffness(short term)		ISIRI 11436/ ISO 9969	8 KN / m2≤
Flexibility 30%		ISIRI 12190/ISO13968	No power drop and pipe breakage
Percentage of soot		ISO 6964/ ISIRI 9116-3	2-2.5%
Soot distribution		INSO 20059 / ISIRI 9116-3	Distribution rate A1,A2,A3 or B3 ≥
Oxidation Induction Time(OIT)		ISIRI 9116-3 /ISIRI 7186-6	≥20 min
Heat resistance		ISIRI 9116-3 / ISIRI 17614	No corrosion, crack and bubble on the surface of the pipe
Dimensions	Internal diameter	DIN 16961 / ISIRI 9116-3	1592±2 mm
	e_5,min	ISIRI 9116-3	mm 9±1
	Height of profile	ISIRI 9116	120±3mm

The Spiral Double-wall Corrugated Pipe, is one of the different types of double-wall pipes which is in accordance with ISIR 9116-3 in the B row of Iran’s national standards. In terms of technology, these pipes are smooth on their inner layer and wavy on their outer layer and because of the unique design of their profile, they are light in weight compared to their similar type. These pipes are resistant against outside pressure, overloading and the heavy weight of the soil on top of them. And also, because of their flexibility, they are resistant to the ground vibrations.

The Spiral Double-wall Corrugated Pipe, is in accordance with ISIR 9116-3 with ring stiffness of 4SN, 8SN, and 16SN, with PE80 and PE100 material.

The corrugated pipes are double-walled, made of high density profiles (HDPE).

In the production process of spiral double-wall corrugated pipe, two extruders are being used for heating the polyethylene to melt and reshape it.

The visual appearance of spiral double-wall corrugated pipe, contains a surface with spiral rings around it like a snail.

All the quality examination of the products is being performed in the company’s lab with the latest technology in the world.

The 1800mm Spiral Double-wall Corrugated Pipe, with 5mm in thickness of the inner layer, has 1020N of transverse tensile strength.

The raw materials of the pipes of this company are from Shazand, Amirkabir, and Maroon petrochemical and they have the approval stamp of standards.

The Spiral Double-wall Corrugated Pipes of Rothen Plast, have special mechanical and movement properties. Therefore, they are a great choice to be used in water and sewage industry, ventilation system, drainage of rainwater, and etc. Rothen Plast manufactures the spiral double-wall corrugated pipes, uniformly and in exact dimensions.

Sometimes, the spiral double-wall corrugated pipe needs preparations like bending during the installation.

The production of spiral double-wall pipe, is under the influence of different factors such as welding seam and rolled sheet. These factors increase the resistance of the pipes against different situations and tensions.

These pipes have appropriate resistance against breakage and fracture. The production process of spiral double-wall pipe, is done by maintaining the flexibility of the pipe.

The spiral corrugated pipes, can be manufactured up to 3000mm in diameter and in three ring stiffness of 16kN, 31.5kN, and 64kN.

Type of examination		Standard of examination	Acceptance criteria
Appearance		ISIRI 9116-3	Flawless
Density		ISIRI 7090-1/ISIRI 9116-3	0.941 – 0.965 g/cm³
Melt flow rate(MFR)		ISO 1133 / ISIRI 9116-3	0.15≤ < 0.7 g / 10 min
Ring stiffness(long term)		ISIRI 9116-1 / DIN 16961	KN / m2 31.5≤
Ring stiffness(short term)		ISIRI 11436/ ISO 9969	8 KN / m2≤
Flexibility 30%		ISIRI 12190/ISO13968	No power drop and pipe breakage
Percentage of soot		ISO 6964/ ISIRI 9116-3	2-2.5%
Soot distribution		INSO 20059 / ISIRI 9116-3	Distribution rate A1,A2,A3 or B3 ≥
Oxidation Induction Time(OIT)		ISIRI 9116-3 /ISIRI 7186-6	≥20 min
Heat resistance		ISIRI 9116-3 / ISIRI 17614	No corrosion, crack and bubble on the surface of the pipe
Dimensions	Internal diameter	DIN 16961 / ISIRI 9116-3	1800±5 mm
	e_5,min	ISIRI 9116-3	mm 9±1
	Height of profile	ISIRI 9116	135±1mm