Flat Flange

Why Choose Us

Professional Team

Our cutting-edge facilities and our highly qualified team of professionals allow us to offer the complete range of forged steel flanges and high-spec forged components. Our product line features the highest standards of quality, productivity and reliability.

Quality Control

Our elite sales staff and our veteran machinists work together to ensure that the highest quality of care is implemented in every stage of creating each precision engineered flange that leaves our shop.

Advanced Equipment

We have 2000 square meters of storage and processing center which covered equipment using in slitting, cutting in horizontal, laser cutting, plasma and grinding machine and embossing machine.

Custom Service

We offer a range of value-added services, including custom fabrication and assembly, to enhance our clients experience.

What is Flat Flange

Flat face (FF) flanges are similar to raised face flanges, but they have a flat surface. These flanges have a gasket surface in the same plane as the bolting circle face. The flat face is the simplest type of flange face available.

Flat Face Flange

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Sliding Sleeve Flat Flange 8 Hole

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Flat Face Flange

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Stainless Steel 304 Flat Flange

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Benefits of Flat Flange

●Ease of Installation：Simplified installation process compared to welding methods.

●Durability：Our Flat Face Flange is incredibly durable and can withstand varying temperatures and pressure requirements. Our product is designed to last for an extended period, even in high-stress applications, increasing the lifespan of the overall system in which they are integrated.

●Versatility：Flat Face Flange is versatile and can be used in several different applications. The product can be used in a range of industries, including oil & gas, petrochemicals, water treatment and sewage treatment plants, food and beverage, and pharmaceuticals.

●Cost-Effective：Our product offers a cost-effective solution for many applications due to the innovative design of the flat face, reducing the need for additional gaskets or sealing materials. The cost savings, coupled with the durability and longevity of the product, make our Flat Face Flange a reliable and cost-effective solution for our customers in many industries.

What are the Applications of Flat Flange

Pipeline Connections

Flat Flange facing is used to prepare Flat Flange for pipeline connections. Flanges are used to connect pipelines, valves, and other equipment, and flange facing ensures a secure and tight seal between the two surfaces, preventing leaks.

Refineries

In refineries, they are used to prepare Flat Flange for equipment connections, such as heat exchangers, distillation columns, and reactors. Flange facing ensures a leak-free joint and helps to maintain the reliability and efficiency of the equipment.

Offshore Platforms

Flat Flange services are used on offshore platforms to prepare flanges for equipment connections, such as pumps, compressors, and separators. Flange facing ensures a secure and tight seal between flanges, reducing the risk of leaks and potential environmental damage.

Types of Flat Flange

Stainless Steel 304 Flat Flange

Compared with the flange with neck, the plate flange can be divided into carbon steel plate flange, stainless steel plate flange and alloy steel plate flange according to the material. The structural form of flange includes integral flange and unit flange.

Sliding Sleeve Flat Flange 8 Hole

Flange is a kind of ring made of materials that can produce plastic deformation and have certain strength. Most flanges are cut from non-metallic plates or manufactured by professional factories according to the specified dimensions.

Components of Flat Flange

A flat flange is an extension of a structure and usually has holes drilled into it, usually with a flared or angled end to form a joint. These holes are placed in the flange to accommodate securing bolts. The flange joins or seals the various parts of the structure.

Material of Flat Flange

An ISO / OHSAS / PED Certified Stockist and Exporters of Flat Face Flanges Manufactured with the finest quality raw materials (Stainless Steel, Duplex, Super Duplex, Nickel Alloys, Cupro Nickel, Alloy 20, Carbon Steel, etc.) results in High-Quality End Products.

Process of Flat Flange

The manufacturing process of flat flange mainly is divided into forging, casting, cutting and rolling. The casting and forging flanges have advantages that the blanks of them have accurate shape, size and low costs and only need simple process.

Product features of Flat Flange

Flat Flange not only saves space and reduces weight, but also ensures that the joint does not leak, and has good sealing performance. The reason why the size of compact flange decreases is that the diameter of the seal is reduced, which will reduce the cross section of the sealing surface.

Maintenance Tips for Flat Flange

Protective Coatings

Out of the many ways, the best way to prevent Flat Flange corrosion is to coat them with maintenance paints. Epoxy coatings are the best in such cases. Flanges made using different materials largely come in contact with soil, water, moisture, etc., which are the greatest contributors to corrosion. Being a protective layer, these coatings act as a fence between the flanges and these corrosive elements. Similar to painting methods, these can be easily applied before the installation process.

Lubrication and oiling

In spite of the fact that oil is by no means the only lubricant option, lubrication has been shown to be helpful in reducing erosion. Aside from that, rubber and plastic can also be lubricated using oil. These lubricants are often administered after rust has already formed. The advantage of rust remover is that it gets into the metal pores. Rust can be pretty simple to remove if it has gathered in a tiny amount.

Avoid metal-to-metal contact

Galvanic corrosion is a type of corrosion that happens when metals come into touch with one another. A weaker part of the entire piping system results when one metal pulls electrons away from another. The metal in question should be insulated in order to avoid this. Installing insulators like wear pads or pipe shoes would be necessary for this. They serve as a divider between the metals, resulting in flange protection and longer retention.

How to Choose Flat Flange

Understanding the Basics of Flanges
Flanges are flat, circular discs with evenly spaced bolt holes connecting pipes, valves, or equipment. They act as a sealing mechanism to prevent leaks and ensure the integrity of the piping system. Flanges are available in different materials, sizes, and pressure ratings to accommodate the requirements of various industries.

Choosing the Right Flange Material
When it comes to selecting flanges, the choice of material is crucial. For industries requiring robust corrosion resistance, such as offshore applications or those involving corrosive fluids, stainless steel flanges are an excellent choice. Stainless steel offers exceptional durability, longevity, and resistance to rust and corrosion. On the other hand, carbon steel flanges are suitable for industries with lower corrosion risks and specific temperature and pressure requirements.

Considering Flange Pressure Ratings
Pressure ratings are vital for determining the suitable flange class for your industry. Flanges are classified based on their pressure-temperature ratings, which indicate their maximum allowable pressure at different operating temperatures. Selecting flanges with appropriate pressure ratings that align with your industry's operational requirements is essential to ensure safety and reliability. API International stocks AWWA Class B Steel Blind Flanges that are pressure-rated to 86psi, whereas their AWWA Class E Steel Blind Flanges are pressure-rated up to 275psi.

Assessing Flange Types and Facing
Different flange types are designed to cater to specific needs. Common types include slip-on flanges, weld neck flanges, blind flanges, lap joint flanges, and socket weld flanges. Each type has its advantages and is suitable for particular applications. Additionally, considering the flange facing is essential to ensure proper sealing. Raised face (RF) and flat face (FF) are two popular facing types, each offering distinct benefits depending on the industry's demands.

Industry-Specific Considerations
Every industry has unique requirements when it comes to flanges. For example, the Agriculture industry may require flanges that can withstand the harsh conditions of irrigation systems, while the HVAC industry may prioritize flanges with excellent insulation properties. Understanding your industry's specific challenges and demands will help narrow down the options and identify the most suitable flanges for your applications.

Welding Method of Flat Flange

A socket welding flange is attached by inserting a pipe into the recessed area of the flange. The welding neck flange is typically butt welded to a pipe. For socket welding, the radiographic inspection can't be done. In contrast, butt welding can do the test. Therefore, welding neck flanges are recommended for welds with high testing requirements.

Generally, butt welding requirements are higher than socket welding requirements as well as the testing requirements. For butt welding, it is necessary to do radiographic inspection, but for socket welding, magnetic particle testing or penetrant testing is enough. If the fluid in the pipe does not have high welding requirements, socket welding is recommended for its convenient testing.

Socket welding is mainly used for welding small diameter valves and pipes, pipe fittings and pipes. Small diameter pipes are generally thin-walled so that unfitness and ablation easily occur, and the pipes are difficult to be butt welded. Thus, they are more suitable for socket welding. In addition, the socket weld bell end has strengthening action, so this welding method is also widely used under high pressure. However, socket welding also has some shortcomings. One is that the stress is not good after welding, which is prone to incomplete penetration and there is a weld bead in the piping system. Therefore, socket welding should not be used for the piping system with medium susceptible to crevice corrosion and the piping system with high cleaning requirements. Furthermore, the ultra-high pressure pipe, even with a small diameter, is relatively thick-walled , so butt welding should be used as far as possible.

In short, socket welding forms a fillet weld, while butt welding forms a butt weld. Butt welding is better than socket welding from the analysis of weld strength and stress condition, so the butt welding is suitable to be used when the pressure is higher and the service condition is bad.

Our Factory

Shandong Daye Pipes Co., Ltd. was established in 2006, as a professianl company with combined service covering trade and processing of stainless steel coil, sheet, rod ect, supported by ready stocks to meet requirements of prompt shipment.With years growth, we had achieved strategic cooperation with many stainless steel mills, including TISCO, BAOSTEEL, POSCO(ZPSS) and others prime grade.

FAQ

Q: What is flat face flange?

A: Flat face (FF) flanges are similar to raised face flanges, but they have a flat surface. These flanges have a gasket surface in the same plane as the bolting circle face. The flat face is the simplest type of flange face available.

Q: What is the difference between flat face and raised face flange?

A: The difference between a raised face and a flat face flange is that the raised face has a raised area that surrounds the pipe bore and the flat face flange doesn't. These are two of the most commonly used types of flange faces.

Q: What is FF and RF flange?

A: Flanges are an integral part of the Piping industry, which are used to form a link between two different Pipes. Flat (FF), Raised (RF), Ring Joint (RTJ), lap joint (M&F), tongue, and groove (T&G) are the 6 styles of flange faces needed.

Q: What flanges are machined with a flat face?

A: Flat face (FF) flanges are machined flat and do not have a ridge on the mating surface, so the gasket has full contact. Flat face flanges are most often used for relatively low-pressure, low-temperature applications, most often for 150 through 300 psi rated flanges.

Q: What is difference between flat and flange?

A: For an attached flat wall, click Sheetmetal > Flat. A flange wall is an attached secondary wall, dependent on a first wall. It has an open cross-sectional sketch that is extruded or swept along a trajectory. An attachment edge can be linear or nonlinear.

Q: What is the process of making flanges?

A: The manufacturing process of Flat Flange mainly is divided into forging, casting, cutting and rolling. The casting and forging flanges have advantages that the blanks of them have accurate shape, size and low costs and only need simple process.

Q: What is the process of casting a flange?

A: The cast manufacturing method begins with molten metal that's poured into a mold to form the desired shape—in this case, a flange. After the liquid metal has hardened, the mold is opened and the casting is removed, then machined to the necessary dimensions and surface finish.

Q: What is the use of flat face flange?

A: Flat face (FF) flanges use non-metallic gaskets (soft gaskets) and should always have a serrated sealing surface. This type of flange is well suited to low pressure applications and is used for pressure classes 125 and 250.

Q: How is a flange attached to a pipe?

A: Typically, flanges are attached to pipes via welding, brazing, or threading. Welding joins materials by melting the workpieces and adding a filler material. For strong, high pressure connections of similar materials, welding tends to be the most effective method of flange connection.

Q: How do flange fittings work?

A: Also known as a screwed flange, this style has a thread inside the flange bore which fits with the matching male thread on the pipe or fitting. The threaded connection means you can avoid welding in many use cases. Simply match the threading to the pipes you wish to connect.

Q: What are the parts of a flange?

A: Pipe flanges are one of the most used connection types for pipes. These connections consist of three different parts: the pipe flange, a gasket, and bolting. They are used for various industrial applications, pressure classes, and media.

Q: Are flanges cast or forged?

A: Cast Or Forged Flange: Which Is the Best Suited Option for you The production of flanges often happens using forged and cast processes. Forged flanges are more robust compared to cast steel flanges. Structure and composition are both consistent with forgings. Forged flanges come with higher production costs than cast flanges due to their manufacture.

Q: What is difference between flat and flange?

Q: What material is a flat face flange made of?

A: The Slip on flat face flanges can also be made in different materials such as carbon steel, alloy steel, stainless steel and high alloy such as the cupronickel alloys. The difference in the material grade influences the mechanical properties of the ASME B16. 5 FF flanges such as the tensile strength and toughness.

Q: What is the typical material of a flange?

A: Steel is the most common flange material and has higher carbon content for applications requiring superior strength. Stainless Steel is used when high durability and corrosion resistance is required.

Q: What kind of steel is used for flanges?

A: Carbon steel (CS) is the most common flange construction material used within the oil and gas industry, although the following flange materials are also commonly used: Cast iron. Nickel alloy. Stainless steel.

Q: How do I identify a flange material?

A: Consider the tolerances, flange dimensions, temperature and pressure ratings, and pipe materials to determine the appropriate flange material. ANSI ratings help to provide information on heat and pressure tolerances. The fitting type is one of the crucial things to consider. The material you choose must allow welding.

Q: What is flat flange?

Q: What is a flat face flange?

A: Flat face (FF) flanges are similar to the RF flanges, but they do not have the raised area like the RF flange. Instead, the whole surface is flat. That means that the gasket used with the FF flange has full contact with the whole surface where two flanges are mated.

Q: What is a 316L flange made of?

A: Stainless Steel 316L Flanges are low carbon version flanges of the 316 flanges. These are one of the most used flanges in the world next to the 304, 304L and 316 flanges. Navstar Steel is a leading manufacturer and supplier of the Stainless Steel 316L Flanges in various dimensions, pressure classes and types.

As one of the leading flat flange manufacturers and suppliers in China, we warmly welcome you to wholesale cheap flat flange from our factory. All custom made products are with high quality and competitive price. Contact us for more details.

slip on flat face flange