What is FRP Flange and Why Do We Use Them?

When working with fiberglass piping systems, it's important to choose the right components, such as FRP flange and GRP flange options, for reliable performance. FRP flanges and GRP flanges are commonly used due to their corrosion resistance and durability. Whether you need an FRP flange and blind or an FRP stub flange, these components are essential for various piping applications. Additionally, FRP pipe flange and fiberglass pipe flange options are designed to provide secure connections in demanding environments. Both fiberglass flange and fiberglass flanges offer similar benefits, ensuring that your piping system remains robust and long-lasting.

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1. Design of GRP/FRP flanges

The existing metal or GRP/FRP molds below DN for FRP flanges are integrally formed with FRP raw materials on the mold by manual layering.

2. FRP Flange Standards

The production, inspection, and acceptance of our company's GRP/FRP flanges are by ASTM "Glass Steel Pipe and Fittings" standards. GRP/FRP flange connection size standards are by ASME B16.5-, ANSI B16.5-, JIS, and other standards, or designed and manufactured by our company according to customer requirements. The existing molds are DN25-DN.

All products can be customized to your needs,so just contact us to learn more details.

3. FRP Flange Parameters

We have different types of flanges, such as bushing, short pipe flanges, and bushing according to different standards.

GRP/FRP flange size table

D(id) P=0.6Mpa P=1.0Mpa P=1.6Mpa s L S L S L 15 12 100 15 100 15 100 20 12 100 15 100 15 100 25(1 inch) 12 100 15 100 18 100 32 15 100 15 100 18 100 40 15 100 18 100 20 100 50(2 inch) 15 100 18 100 22 150 65 15 100 20 150 22 160 80(3 inch) 18 150 20 160 25 230 100(4 inch) 20 150 22 180 28 250 125(5 inch) 22 200 25 230 30 300 150(6 inch) 22 200 28 280 33 370 200(8 inch) 25 220 33 360 38 500 250(10 inch) 28 280 42 420 48 620 300(12 inch) 32 300 48 500 55 350(14 inch) 35 400 54 570 400(16 inch) 40 420 450(18 inch) 45 480 500(20 inch) 50 540 600(24 inch) 52 640 700(28 inch) 55 690

If you have any questions about product parameters, you can contact us at any time!

4. FRP Flange Forming Process

GRP/FRP flange is divided into two integral and bonding flanges according to the forming process
1. Overall flange: The overall flange is generally equal wall thick plate flange. The advantage of this structure is that the flange ring and cylinder are formed together. The reinforced fiberglass and fabric are continuous, giving full play to the characteristics of high FRP strength and ease to form. The broad flange is wholly done entirely by hand-paste.
2. Adhesive flange: The bonding flange is made by processing the flange ring and the flange pipe separately and then bonding the two together. This structure is widely used. It gives full play to the advantages of easy to-form, simple mold, easy to manufacture, suitable for manufacturing large diameter, small-batch, and different types of fiberglass flanges. When the bonding flange is made, feed the pre-processed pipe, make wool at both ends, insert it on the mold seat instead of the core shaft, and process the flange ring.

5. Features and use of GRP/FRP flange parts

1. GRP/FRP flange has excellent physical performance, the specific proportion of GRP/FRP pipe is 1.8-2.1, about 1/4 of steel, of the specific strength is higher than steel, cast steel, and plastic, the weight is generally not more significant than that of the same steel pipe, excellent physical and mechanical performance, in addition, the expansion coefficient of steel, heat conduction coefficient is only 0.5% of steel, is an excellent thermal and electric insulator.

2. Chemical corrosion resistance and long service life, suitable for the delivery of various media such as acids, bases, salts, and organic solvents.

3. Excellent hydromechanical characteristics. Hydraulic characteristics are one of the essential characteristics of GRP/FRP pipes. Excellent hydraulic characteristics mean that the fluid pressure head loss is slight, and the transmission pump with a small pipe diameter or small power can be selected to reduce the initial investment of the pipeline engineering, save electric energy and reduce the operation cost. The inner surface of FRP is relatively smooth, and the general surface roughness rate can be 0.008, which can almost be considered as a "hydromechanical smooth pipe." In operation, the inner surface of steel pipe, cast iron pipe, and cement pipe often produces local corrosion and becomes rougher and worse. Fiberglass always maintains the smooth surface of the new pipe.

4. Installation and maintenance cost is low. In general, GRP/FRP pipe does not need special corrosion treatment; the insulation layer can be thinner or even without insulation treatment; light pipe, lifting equipment tonnage, less power consumption, GRP/FRP pipe length is longer than cement pipe and cast-iron pipe, relatively reduced, which will reduce the installation and maintenance cost, which has been proved by many engineering practices at home and abroad.

What is GRP/FRP flange?

FRP stands for "fiberglass reinforced plastic." An FRP flange is a type of flange that is made from fiberglass-reinforced plastic. A flange is a type of connector or coupling that is used to join two pipes or other mechanical components together. It typically consists of a circular ring that is attached to one end of a pipe or component and has an opening on the other end that allows it to be connected to another pipe or component.

FRP flanges are often used in applications where corrosion resistance is important, as fiberglass-reinforced plastic is resistant to many corrosive chemicals. They are also lightweight and easy to install, making them a popular choice in many industries, including chemical processing, water treatment, and oil and gas. However, it is important to note that FRP flanges may not be suitable for all applications, as they may not be as strong or durable as flanges made from other materials, such as metal. It is always a good idea to consult with us to determine the best type of flange for a particular application. 

We also provide Phenolic FRP, FRP Grating, FRP Flange Cover, FRP Tee, and FRP Elbow.

Contact us to discuss your requirements of fiberglass water tank price. Our experienced sales team can help you identify the options that best suit your needs.

40-inch FRP flanges in accordance with ASME B16.47

40-inch FRP flanges in accordance with ASME B16.47

Here's a table comparing FRP flanges to carbon steel flanges, highlighting their differences and advantages and disadvantages:

Category FRP Flanges Carbon Steel Flanges Material Made of composite materials, including fiberglass and resin Made of carbon steel, a heavy and strong metal Weight Lightweight, easy to handle and install Heavy, requires more manpower to handle and install Corrosion Highly resistant to corrosion, rust, and chemical attack Prone to corrosion, requires additional coatings to protect from rust Temperature Limited resistance to high temperatures (up to 250°F) Good resistance to high temperatures (up to °F) Pressure rating Limited pressure rating compared to metal flanges High pressure rating, suitable for a wide range of applications Cost Generally more affordable than steel or stainless steel Generally less expensive than other high-performance materials

Advantages of FRP Flanges:

1. Corrosion resistance: FRP flanges are highly resistant to corrosion, rust, and chemical attack. They do not require additional coatings to protect them from corrosion.

2. Lightweight: FRP flanges are lightweight, making them easier to handle and install. This can result in lower installation costs, as less manpower is required to install them.

3. Affordability: FRP flanges are generally more affordable than carbon steel flanges, making them a cost-effective solution for many applications.

Disadvantages of FRP Flanges:

1. Limited temperature range: FRP flanges have limited resistance to high temperatures, with a maximum temperature range of up to 250°F. This can limit their use in certain applications.

2. Limited pressure rating: FRP flanges typically have a lower pressure rating than carbon steel flanges, which can limit their use in high-pressure applications.

Advantages of Carbon Steel Flanges:

1. High pressure rating: Carbon steel flanges have a high pressure rating, making them suitable for a wide range of applications.

2. Temperature resistance: Carbon steel flanges have good resistance to high temperatures, making them suitable for high-temperature applications.

3. Durability: Carbon steel flanges are durable and can withstand heavy loads and impact.

Disadvantages of Carbon Steel Flanges:

1. Corrosion resistance: Carbon steel flanges are prone to corrosion, and require additional coatings to protect them from rust.

2. Heavy weight: Carbon steel flanges are heavy, requiring more manpower to handle and install, which can increase installation costs.

3. Cost: Carbon steel flanges are generally more expensive than FRP flanges, although less expensive than some other high-performance materials.

Overall, FRP flanges and carbon steel flanges have different advantages and disadvantages depending on the specific application. FRP flanges are generally more lightweight, corrosion-resistant, and affordable than carbon steel flanges, but have lower temperature and pressure ratings. Carbon steel flanges are heavy, durable, and have a high pressure rating and better temperature resistance than FRP flanges, but are prone to corrosion and require additional coatings.