What is a Flange?
ASME B16.5 Flange Connects Piping And Components In A Piping System By Use Of Bolted Gaskets Or Connections. Flanges are a type of device used by factories to ease cleaning, modifying and inspection of pipes in a piping system. Globally, Pipe Flanges are produced using various standards including ASTM, ASME/ANSI, BS, DIN or even EN. Most Various Used Flanges Are WN Flange, SORF Flange, BLRF Flange, SWRF Flange, Lap Joint Flange Or NPT Flange. ANSI B16.5 Flanges Are Mostly Used For Industrial, Chemical, Gas And Oil Industry, Piping Connection, Water Pipeline System.
What Are The Different Types Of Flanges?
There are several flanges available across different markets across the world. Some of the most common ones include blind flange, slip on flange, socket weld flange, lap joint flange, reducing flange, long neck flange, threaded flange, square flange, orifice flange, loose flange, screwed flange, plate flange, spectacle blind flange, etc.
How To Select Piping Flange?
The selection of flanges depends on several factors like the type of application, the method of joining it to the pipe, properties of the material, size of the pipe and flange, thickness, nominal bore size as well as the outer diameter. These dimensions are important as they aid in proper alignment of the flange to the vessel or even to the pipe. Furthermore, the purpose of the flange is also what decides the type of flange to be used. For instance, if a flow is to be reduced, a reducer flange is best suited for that particular application, whereas if a flow is to be blocked, then buyers may purchase a blind type from any Flanges Manufacturer In India.
How To Choose A Flange Rating?
Flange rating or as referred to as class is the maximum pressure either in psi or bars, which the said flange is able to withstand at elevated temperatures. A higher rating or a higher class is stronger in comparison to flanges that are rated low because they are able to sustain more pressure, despite the increase in temperatures. Once you are able to determine the max working temperature in a piping system, select the max rating based on the temperature level and the maximum pressure you expect in the application.
- ASME B16.5 Flange
- Stainless Steel Slip On Flange
- Stainless Steel Blind Flange
- Stainless Steel Socket Weld Flange
- Stainless Steel Weld Neck Flange
- RTJ Flange
- Flat Face Flange
- Raised Face Flange
- Reducing Flange
- Tongue And Groove Flange
- GI Puddle Flange
- ASME B16.47 Flange
- ASME B16.47 Series A Flange
- ASME B16.47 Series B Flange
- Orifice Flange
- Spectacle Blind Flange
- Pipe Flange Spacer Ring
Stainless Steel Flanges
- Stainless Steel 304 Flanges
- Stainless Steel 316 Flanges
- Stainless Steel 304L Flanges
- Stainless Steel 316L Flanges
- Stainless Steel 304H Flanges
- Stainless Steel 310 Flanges
- Stainless Steel 310H Flanges
- Stainless Steel 310S Flanges
- Stainless Steel 316H Flanges
- Stainless Steel 317L Flanges
- Stainless Steel 321 Flanges
- Stainless Steel 347 Flanges
- Stainless Steel 904L Flanges
Duplex & Super Duplex
Top 6 Commonly Used Pipe Flanges types
Blind flanges, unlike it's other counterpart flanges, has no hollow core. The primary function of a blind flange is to seal or shut off a piping system. In addition to being constructed in a standard size, the Carbon Steel BLRF Flange could be customised to meet the requirements of the buyer. The most common material that is highly demanded the manufacture of the ASME B16.5 Blind Flange includes stainless steel and carbon steel.
Slip On Flanges
Forged Steel Slip On Flanges notice an improvement over their wear resistance properties. Next, their impact resistance improves as well. And lastly, because the grain flow of the Stainless Steel Slip On Flange gets aligned to it's form, the end result is a smoother surface.
Socket Weld Flanges
ANSI B16.5 Socket Weld Flange is that they are lightweight and are less dense than stainless steel. Being lighter in weight makes the assembly of these flanges faster. This is also a cost-effective metal for use in several applications. Contrary to these steels, the use of SWRF Flange yields properties like higher tensile strength, better resistance to corrosion, longer service life and excellent service.
Weld Neck Flanges
Welding Neck Flange, there could be some form of inherent corrosion properties, due to the presence of elements. Although carbon steel could be coated or galvanised to achieve minimal resistance. The Weld Neck Flange Pressure Rating could be anywhere between class 150 to class 2500.
Lap Joint Flanges
Lap Joint Flange Manufacturers produce a variety of lap-joint flanges for use in different systems. The Losse flanges belonging to the lap joint Flanges ANSI B16.5 group range from ½ inch to 24 inch in diameter.
There are different types such as the ASME B16.5 Threaded Flanges which could be used to thread in two pipes of different diameters.
ASME B16.36 Orifice Flange
Orifice Flange is used in combination with an orifice meter. This set up is useful while measuring the flow rate of media in the pipeline. The pipeline could have media that is either liquids or gas. There are pairs of pressure Tappings present on the orifice flange. These tappings are located mostly on 2 sides of the Weld Neck Orifice Flange.
ASME B16.48 Spectacle Blind Flange
Usually, ASME B16.48 Spectacle Blind Flange works well in highly corrosive areas. Grades like 316 or as referred to as marine grade steel are useful for marine engineering purposes or for use in coastal regions like docks etc. These areas are susceptible to getting corroded by exposure to salt sprays or seawater.
Reducing Flange is made up of carbon steel to add to the strength and to make the pipe diameter smaller at connection. Reduction fittings are useful when reducing the volume of fluid flow. There are different dimensions of these flanges. The Reducing Flange is a type of flange falling under the specification that covers the outer diameter ranging from ½ inches to 24 inches and including the pressure class 150 to Class 2500.
Flange Face Provides A Mean To Mate The Flange With Sealing Element, Top 4 Flange Face Types Are Below
- Tongue and Grove
- Flat Face
- Raised Face
- Ring Joint
Tongue And Grove
Tongue And Groove Pipe Flanges Are Governed By The B16.5 Standard Which Includes Flanges From ½ Inches Through 24 Inches In Outer Diameter. Flanges Are Specific Metallic Objects With Projections That Allow Them To Be Fitted With Pipes With An Extra Surface For Attachment.
These properties are far better than the Flat Face Flange. But unlike stainless and alloy steels, carbon steels are tough and they perform well despite being exposed to low-temperature environments.
Throughout the period of the application, the piping system will accumulate dust particles and would require cleaning. If left untreated, the Raised Face Flange Material could get corroded. For eg. In the oil and gas industry, the fuel passing through pipes has a hydrocarbon base.
Rtj Flange has great resistance to seawater. Hence their use is prevalent in marine engineering. They also have good thermal and electrical conductivity, which is why copper nickel alloy Ring Type Joint (Rtj) Flange Pressure Ratinge are chosen for industries like power generation, where these properties could be put to use.
Flange Marking includes ANSI Or ASME Codes
- Heat Number (Q0114)
- Name of Manufacturer (RSA)
- Nominal Pipe Size (WNRTJ 2" SCH 160)
- Pressure Class Of Flange (1500#)
- Material Designation (A105 B16.5)
- Country Name (Made In India)
|CLASS||NPS||ASTM A182 SORF Flange||ASTM A182 NPT Flange||ASTM A182 SW Flange||ASTM A182 Loose Flange||ASTM A182 BLRF Flange||ASTM A182 WN Flange|
|Normal Size Of Pipe||Dimensions||Weight (Kilogram)|
|Normal Pipe Size
ASTM A105 Carbon Steel Flanges
The performance of heat treatments on most carbon steels reduces its yield strength and certain mechanical to some degree. However, with High Yield Carbon Steel Plate Flanges, the heat treatment furnishing like tempering or even quenching on these components does not change its yield strength. Carbon Steel SA105 Pipe Flanges aid in regulating the flow of said media. Unlike fittings, flanges, however, work at a deeper level. First, they not only help during inspections but the ASTM A105 Flanges is useful to make modifications or to even clean the pipe in a system.
- ASTM : A105 / A105N
- ASME : SA105, B16.5
- MSS : SP 44
The sum of Nickel, Copper, Niobium, Vanadium and Molybdenum shall not exceed 1.00%.
The sum of Molybdenum and Niobium shall not exceed 0.32%.
Stainless Steel Flange
The use of stainless steel alloys in process industries is very common because as a metal, it offers several benefits. Depending on its crystalline structure, Stainless Steel Flanges are categorised into four classes, i.e. - austenitic, ferritic, martensitic and duplex steels. Primarily sought after for its economical value, the use of Stainless Steel 304 Flanges is typical in applications that require limited corrosion resistance properties. The 316 Material is made up of nickel chromium and molybdenum to increase strength and corrosion resistance opposed to the ordinary 304 stainless steel.
- ASTM: A403, A182, A312, A269, A249, A376, A358, A351, A479, A276
- ASME: SA269, SA276, SA312, SA249, SA182, SA376, SA358, SA403, SA479, SA351
Flange Temperature Pressure Rating Chart
|-29 - 38||19.8||51.7||68.9||103.4||155.1||258.6||430.9|
Industry Specification of Flange
- ASME B16.5 Flange
- ASME B16.47 Flange
- AWWA Flange
ASME B16.5 Flange Specification
Every ASME B16.5 Flange prefers the use of these standards as they offer guidance over certain concepts. The concepts chronicled in this standard include its pressure rating, tolerance, marking, testing etc to name a few. Another important area highlighted by the standard is the materials used in the construction of ANSI B16.5 Flange. Since the oil and gas industry is a sector that deals with high velocity transmissions, the pressure applied in the flanges is high.
Difference Between ASME B16.47 Series A and Series B Flange Specification
ASME B16 47 Series A Flange are produced in such a manner that they support the worker for the periodic repair and maintenance of pipes in a system.
Flanges simplify procedural processes like cleaning, modifying as well as inspection of a piping system. Usually, the performance of tasks like these is tedious because it is not a way to restrict or modify the rate of flow in pipes. By making use of good quality ASME 16.47 Series B Flange, it is possible to complete these tasks with much ease.
Unlike the other specifications that have certain rules with regards to the materials used in the manufacture of flanges, the AWWA, has a specific set of minimum physical and chemical properties. In addition to the minimum yield strength and tensile strength of the Stainless Steel AWWA C207 Class D Flange, the specification also mentions the contents of carbon, phosphorous as well as sulfur. The chemistry of Awwa C207 Flange must contain a Maximum Carbon content of about 0.29 %, whereas the maximum content of Phosphorus is around 0.04 % and lastly the maximum permissible content of Sulfur is 0.05 %. It is customary for AWWA C207 Class E Flange to stamp these flanges with several details including the trademark, class, nominal size, material designation as well as heat. This standard also mentions tolerances for the AWWA C207 Blind Flange.
Special Flange Materials
Low Temperature Carbon Steel Flanges
ASTM A105, A105N Flanges are an integral part of processing based industries. Most industries, including the oil and gas, water treatment and nuclear power generation make use of pipes, which permit the flow of media across different factory units. The SA350 LF2 Flanges are in the range of ½ inches to 48 inches in nominal diameter. There are different pressure classes ranging from 150 to 2500. The class 1 and 2 flanges can have pressures from 6bars to 40 bars and can come in different finishes such as oil black paint, zinc plated and hot dip galvanized. The difference is that the class 2 flanges have slightly higher mechanical properties.
High Yield Carbon Steel Flange
Over the course of several years, the walls of pipes could either get damaged or in most cases they would require minor repair work. Sometimes, there is chemical silt that is deposited on the walls of these pipes. ASTM A694 F42, F52, F60, F65, F70 Flanges are a means of inspecting, cleaning or even modifying these systems.
Chrome Moly Flanges
What separates these steels from their carbon steel counterparts is their unique chemistry. The chemical makeup of any steel flange is the deciding factor of the properties of the material. Unlike carbon steels which have only two elements, Alloy Steel ASTM A182 F5, F9, F11, F22, F91 Flanges have multiple alloyants in their chemistry. It is precisely the increased elemental count and content that enhances the properties of alloy steels. Though broadly classified as high and low alloy steels, a commonality between them is the type or combination of elements used to alloy them. The most popular metals used to alloy an Alloy Steel Lap Joint Flange includes nickel, chromium, molybdenum, copper, cobalt, sulfur, vanadium and tungsten.