Flange Fittings Factory

1、What Are Flange Fittings ?

Flange fittings are essential components used to connect pipes, valves, pumps, and other equipment in piping systems. They provide a secure and leak-proof joint, especially in high-pressure and high-temperature environments. Compared with threaded or welded connections, flange fittings offer easier installation, maintenance, and disassembly , making them widely used across industrial sectors.

Typically manufactured from materials such as carbon steel, stainless steel, and alloy steel, flange fittings are designed to meet standards like ANSI, DIN, and JIS. According to industry reports, over 70% of industrial pipeline systems rely on flange connections due to their reliability and flexibility.

2、Main Types Of Flange Fittings

（1）Weld Neck Flange

Weld neck flanges are designed with a long tapered hub that provides excellent stress distribution. They are ideal for high-pressure systems, often used in oil and gas pipelines where pressure can exceed 5000 PSI .

（2）Slip-On Flange

Slip-on flanges are easy to install and align, making them suitable for low-pressure applications. They are commonly used in water treatment systems and HVAC pipelines.

（3）Blind Flange

Blind flanges are used to close the ends of piping systems. They are critical for maintenance and inspection, allowing sections of pipelines to be isolated safely.

• Available sizes range from 1/2” to over 60”
• Pressure classes include 150, 300, 600, up to 2500 class
• Surface finishes include raised face (RF), flat face (FF), and ring-type joint (RTJ)

3、Applications Of Flange Fittings

（1）Oil And Gas Industry

Flange fittings are widely used in upstream and downstream operations. For example, offshore platforms require components that can withstand extreme environments, including pressures above 6000 PSI and temperatures exceeding 200°C .

（2）Chemical Processing

In chemical plants, corrosion-resistant flange fittings made from stainless steel or special alloys ensure safe transport of aggressive fluids.

（3）Water Treatment And Power Plants

These fittings are essential in water distribution and power generation systems, where durability and leak prevention are critical.

4、Flange Types Comparison Table

5、About OPK Fitting

OPK FITTING Hydraulic Equipment Factory is a specialized domestic factory with hydraulic pipes and adaptors production experience. Our managing scope relates to various fields such as hydraulic systems etc.; Including all kinds of materials with different pressure levels, flexible hydraulic hoses with various size criteria, hose fitting, adaptor, etc.

They have been respectively applied in the hydraulic and fluid conveyance systems of industries, such as machinery, metallurgy petroleum, construction, ships, space-flight, agriculture, pharmaceutical, food, and so forth.

• Over 10 years of experience.
• A team of skilled design professionals and talent.
• Excellent product quality and thoughtful customer service.

6、FAQs About Flange Fittings

Q1: What is the main advantage of flange fittings?

The main advantage is easy installation and maintenance, especially in systems that require frequent inspection or modification.

Q2: How to choose the right flange type?

Selection depends on pressure rating, temperature, fluid type, and installation method.

Q3: Are flange fittings reusable?

Yes, in most cases, flange fittings can be reused if they are not damaged and proper sealing components are replaced.

Q4: What standards do flange fittings follow?

Common standards include ANSI, ASME, DIN, and JIS, depending on regional and application requirements.