Underground Filament Winding Process Fiberglass GRP FRP Pipes

As the RPM pipe is accompanied with sand in tts structure, compared with the pure RPM pipe,it not only has property of lighweight and high strength, but also possess high stiffness as the buried pipe and low cost. So it is welcomed from its presence. The usage in conveying water or other fuluid is more and more. The relative information reported that 160 thousand kilometers long RPM pipe had been installed in America during the middle period of 1990s. In Europe, the length of new laid large and middle diameter RPM pipe for conveying water and sewge accounted for 30%-50% of total installed length. In Japan, this kind of RPM pipe account for a certain share, its total installed length had exceeded the aggregate of steel pipe and concrete pipe. And in MidEast area. Almost all the pipes for conveying water, sewage and desalinated seawter are RPM pipe.

The range of pipes dimensions and characteristics offered is wide and able to meet many different application's requirements. They can be produced in any diameter from 25 mm (2") to 4000 mm (160"). Standard lengths are 6 and 12 meters however customized lengths are available on request.

Characteristics of RPM pipe

1. Lightweight, high strength and high stiffness

   The RPM pipe is composed of inner layer, wound layer resin-mortar layer and exterior corrosion-resistant layer, its density is 1.7-2.1, equals one fifth of steel pipe, one fourth of cast steel pipe and three fourth of pretensioned concrete pipe(PCP). As the filament wound reinforced structure exists at the two sides of strength requirement of the pipeline. Else, as the resin-mortar layer is between the middle areas--- lower stress area, so it has increased the stiffness meantime no any decrement to the strength of the pipe.

2. Corrosion- resistant property

   The corrosion-resistant property of RPM pipe is mainly relied on the inner resin, and be seleceted in accordance with the con-dition of the media. It is adopted the reinforced rich resin layer by fiberglass, the resin content is 80% ,it can ensure that the RPM pipe prevent corrosion and leakage.

3. Good hydraulic property

   The inner surface of the RPM pipe is very smooth; the rough-ness coefficient is very small. Not only the inner surface of new pro-duced pipe is very smooth, but also it is same smooth as the begin-ning after has been used many ears, and no seaweed and other aquatic derivative be adhered. The water conservancy fator( C) can be kept within 140 and 150 during a long period. After the relative testing, its fricition factor(f) is 0.000915, it is smaller than the PCP(f=0.00232) and the steel pipe increase the conveying capacity above 20%. So when the conveying capacity is same, can adopt the RPM pipe with lower diameter, can save the investmen of the project. The conveying capacity comparison can see the following Table 1 and Diagram

4. Health property of RPM pipe

   The main material of PRM pipe is unsaturated resin and fiberglass, are formed by a specified procedure. So its inner surface is very smooth and the stiffness is above Barcol 40HBa, the unsaturated resin itself was passed the certification by the relative national sanitary authority and the RPM pipe also has been verified by the relative national sanitary authority. So the RPM pipecan be com-pletely used in the conveying drinking water and it has above 20 years practical example.

5. Anti-shocking property

  Since the RPM pipe is between the stiff pipes and flexible pipe, so its Anti-shocking property is good, it will deform under the action of strong foreign force ,but it will not bring its breakdown and deformation because it doesn’t bring delamination and cracking under the condition of deformation is 25%.

6. Abrasive resistance

   The inner suface of RPM pipe is added abrasion resistant filling,so it can improve the abrasive resistant property of te pipe, and can pro-long the life of the product.

7. Low temperature resistant property

   There will not be cracking under the condition of -40- Cand the strength of the RPM pipe doesn’t decline.

8. Complicance with the environment

   The RPM pipe is applicable for the different kind of environment, such as beach, bottom of the sea, river ,mountain area, marshland, desert and plain,etc. It ha the following characteristics: fast installation, convenient transportation and long life,etc.

Specification of RPM pipe

1. Usual nominal pressure class

2. Stiffness SN(N/m2)

    2500N/m2      5000N/m2     10000N/m2

3. Norminal diameter

    The RPM Pipe that its diameter is between DN15 and DN4000mm

4. The length per piece

    It is any length Within 12 meters per piece.

5. Type of joint

    The type of joint is socket-spigot with double“O”seal rings, flange joint, butt-joint and socket-pigot with adhering, etc.

6. Fittings

In order to satisfy the different types of joint of pipe or pipeline, we also can produce many kinds of flanges, tees, reducers, manholes and other fittings to meet the differentstandards, such as GB, JC, HG, DIN and others.

Note: The serial parameter listed in the above table is only applicable for water supply or drainage. Normally the pipe is not larger than DN300 doesn’t add sand.

Related products

Installation and application

Hengshui Aoliande Trade Co., Ltd. is professional company which to market & sell FRP Pipe, FRP storage tank, FRP molded products, FRP pultrused products and FRP production machines, through the continuous development and introduction of professionality and technology, the company rely on advanced technology, exquisite craftsmanship, reliable quality and perfect service, passed ISO9001, ISO14001, OHSAS18001 management system certification, now we have 50+ staff, annual sales of glass fiber reinforced plastic series products achieved 5,000,000 USD, products have been sold to all over the world, USA, Brazil, Japan, Germany, India, Malaysia, Egypt etc, and won the support and trust from new & old customers.

1. Q: Are you Trading Company or Manufacturing Factory?

A: We are both manufacturer and trading company. We have our own factory for almost 10 years, and we have better service of overseas customers. Welcome to send your inquiry!

2. Q: How about the Delivery time?

A: Normally, 10-15 days to finish the order for a 20ft container. Welcome to ask for the detailed delivery time according to your order quantity!

3. Q: How can you guarantee the product quality?

A: We have the quality control system ISO9001:2015, and it's been followed strictly. We also have the professional QC team, and each our package worker will be in charge of the final inspection according to the QC instruction before packing.

4. Q: What is about the payment terms.

A: Basically, the payment terms are paypal, T/T, L/C at sight. Western Union, Alipay.

5. Q: Can you do OEM for me?

A: We accept all OEM orders, just contact us and give me your design,we will offer you a reasonable price ASAP.