Weld Neck Flange
Weld neck flanges perform exceptionally well in high-pressure systems. They are one of the most common flange types. Their long neck allows a seamless butt weld directly onto the pipe, leaving a smooth connection. Because of this, they are perfect for use in sectors like the oil and gas industry, where dependability under high pressure is crucial.
Slip-on Flange
The simplicity of installing slip-on flanges makes them popular among manufacturers and fabricators. Because the slip-on flange lacks a weld bevel and permits pipe length adjustment in relation to flange location, it is an easy and excellent substitute for a weld neck. The matching pipe will have plenty of room in the slip-on’s bore.
Socket-weld Flange
Socket-weld flanges are resilient to high pressure and temperatures, benefiting the power generation and chemical processing industries. With a counterbore in the middle to enable a clean pipe weld into the socket, socket weld flanges are less popular but no less effective connection for flanges that require less total available space than a typical weld neck flange.
Threaded Flange
Threaded flanges are easy to install and perform well in low-pressure applications. They are a vital component in piping systems and other environments where it’s essential to maintain a tight seal without doing a lot of welding. Threaded flanges have a female NPT thread in the middle for connecting to male NPT threaded piping.
Blind Flange
Blind flanges are essential for closing off portions of a pipe system. Blind flanges are dependable barriers in petrochemical and other hazardous material-related industries, guaranteeing worker safety and stopping leaks during emergencies or maintenance.
Lap Joint Flange
A Lap joint flange makes the list among the other common flange types. They are also known as Backup flanges, Loose Ring flanges, Loose Hubbed flanges, and Van Stone flanges. Easily disassembled, lap joint flanges offer flexibility and are perfect for industries like the food and beverage industry that need regular maintenance or adjustments.
Copper
Copper flanges help deliver conductivity. The best thing is that they are non-magnetic and can withstand higher loads than other materials. They can withstand high-temperature service as well. One common location for copper flanges is plumbing. They are also helpful in valve parts and pumps along with electrical components and power generation.
Titanium
Titanium is famous for its extreme durability and is exceptionally lightweight properties. The demand for titanium flanges in the aerospace industry is rising. They prefer titanium for superior aircraft construction. Besides its use in aircraft frames, titanium also has excellent resistance to heat that makes it one of the perfect materials for aircraft engines.
Aluminum
No other metal is widely popular in the industry than aluminum. It is lightweight and comes with an excellent weight-to-strength ratio. Aluminum flanges come with microscopic oxide coating on the surface that provides superior corrosion resistance. Architectural frames, marine equipment, wheels, and automotive frames are of aluminum alloys or aluminum.
Superalloys
The basis of superalloys is on the materials like cobalt and nickel. These metals are famously known to withstand harsh environments. They must be resistant to high heat and acid corrosion while they also exhibit wearability.
Stainless Steel
Stainless steel is one of the most common materials used in foodservice equipment, medical tools, or other tools that need frequent sanitizing. Its use doesn’t limit here; they are also helpful in ovens and furnaces which need high heat resistance. Stainless steel flange is one of the common preferences among many users.
Tool Steel
Tool steel billets or ingots are perfect to manufacture flanges. The reason is that they contain carbon and other alloys that combine with iron. The combination helps to strengthen the steel and makes it more impact-resistant and sturdy. The most common use of tool steel is in applications that need durability and reliability during continuous operation.
Carbon Steel
Manufacturers usually use different grades of carbon steel that helps in producing flanges. It usually depends on the requirement of ductility, impacts strength, wears resistance, and hardness. Take the example of low carbon steel; it is robust and highly ductile as it contains the least amount of carbon.
Alloy Steel
Alloy steel is one of the iron-based products that come with less than four percent chromium. It includes materials like nickel, molybdenum, tungsten, vanadium, manganese, copper, and silicon. Alloy steel is one of those materials which has great use in the manufacturing of pipe connectors. It is resistant to wear and tear, harder, and much stronger than you can think.
Key Components Of Flanges
Flange Face
It refers to the area of contact with the gasket used for sealing. Typically, a gasket sits between the two opposing flange faces.
Flange Surfaces
It is the condition of the flange face sealing surface. The surface is serrated or smooth.
Flange Hub
The flange hub is the section that accommodates the pipe that connects to the flange.
Flange Blade
This includes the region where the bolts pass through both the flange and its face.
Bore
A bore is the central hole in the flange where the pipe passes through.
Neck (For Weld Neck Flanges)
It’s the end that connects through the welding process to the connecting pipe or fitting. Usually tapered to allow for stress distribution and reinforcement.
Outer Diameter (OD)
Outer diameter is the distance between two opposite edges of the flange face.
Raised Face (RF)
These flanges have an inner bore circle gasket and a tiny elevated portion around the bore. There are raised face flanges for various pressure and temperature ratings. Also, the most prevalent form of flange used in the oil and gas and chemical engineering sectors is RF flanges.
Male and Female Face (M&F)
To hold the gasket in place, these flanges have elevated parts and matching grooves. However, gasket retention happens on the female face, offering more precise positioning and a wider range of materials.
Tongue and Groove (T&G)
The grooves and raised areas on these flanges mirror those on the male and female face flanges. This facilitates installation because the design encourages self-alignment of the flanges and creates a reservoir for gasket glue.
Flat Face
As their name implies, flat face flanges have an even, flat surface. They also have a full-face gasket covering most of the flange surface.
Ring Joint Face (RTJ)
This face type, used in high-pressure and temperature applications, has a notch in which a metal gasket is placed to maintain the seal.
Connection
Flanges allow for the assembly of components at a joint. One flange is mounted onto the outer circumference of the pipe or equipment, while the other flange is mounted at the opposite side of the joint. They are securely connected using bolts and nuts, ensuring a reliable connection.
Durability
Flanges provide resistance against pressure, temperature, and other forces within the system. High pressures or temperature changes between pipelines or equipment can be effectively accommodated due to the solid connection provided by flanges.
Sealing
Flanges are used to achieve sealing at the joint. Gaskets or sealing materials at the joint prevent unwanted leaks of liquids or gases within the pipelines. This is important for safe operations and environmental protection.
Ease of Assembly and Maintenance
Flanges allow for easy assembly and disassembly of pipes or equipment. When repairs, maintenance, or modifications are needed, the parts can be quickly separated and reassembled using flanges. This provides a significant advantage for production continuity and efficiency.
Flexibility
Flanges enable transitions between different pipe diameters, pressure classes, or materials. They are used at joints of different components or systems to bring together various elements and ensure compatibility.
Raw Material
At the very first process, the system controls check the quality of supplies raw materials as per the test certificate and also visual and dimension. Stainless Steel Flanges are of best quality that ensures high durability, strength and resistivity to varied non-supporting conditions.
Material Inspection
Incoming quality control (IQC) is the process of observes the quality of materials and parts for manufacturing a product before production starts. With incoming inspection, you can control & check chemical analysis for quality even before leading a first item inspection or a during production inspection.
Material Cutting
In this process refers to manufacturing flanges by cutting stripes from the middle plate and then rolling them into round shape. After all other processes and rolling process, weld and then compress the round shape, and finally process the serrated spiral finish and bolt hole. We do Weight Measuring, checking cut surfaces and marking.
Flange Forging
Forged flanges generally have lower carbon content than cast flanges and are less disposed to rust. In Forgings Material Grade Check, weight measuring, and control the temperature. The forged flange is that the inner structure is unfluctuating, and there are no defects such as holes and presences in the casting.
Heat Treatment
In this process of heat treatment, the overall forging cooling speed is the slowest, the standardizing cooling speed is quicker, reducing cooling speed is faster. Flanges are mutually connected and continuous in the process. In this process also do Solution Treatment and Mechanical Testing.
Forging Rolling
It is a forging method that utilizes opposing rolls to shape a metal part. Roll forging uses rolls in order to achieve the deformation of the material, it is mainly classified as a metal forging process and not a rolling process. The forging structure of the rolls used to forge metal parts is only current over a portion of the roll's edge.
Final Inspection
In this method measure & inspect the dimension & size of the flange. The diameter is check to control what size pipe a flanges can be used with, so you must find this information by using the inside of the flange as different to the outside. We also perform some visual testing and Nondestructive testing for betterment.
Rust Prevention
The standard rust prevention treatment for stainless steel flanges include yellow (Golden) paint Coating, black paint coating / black phosphating treatment, varnish paint coating, electro galvanizing coating (Cold), varnish antirust oil coating, hot dip galvanizing coating etc. Also Marking on the flanges.
Well Packing
Steel Flanges must be packed with seaworthy packing method then delivery to clients, generally the packing way include wooden box, iron & steel cage, wooden pallet, iron & steel pallet etc. Because of the normal wooden boxes or pallets have to do fumigation treatment, we generally use plywood pallet or plywood case or box to pack SS flanges without fumigation treatment.
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