ASTM A182 F316 Flange Material

ASTM A182 F316 Flanges are very common in usage due to their improved corrosion resistance properties. A182 F316 Material has an addition of molybdenum in the composition which brings about the extra corrosion resistance. 316 Stainless Steel Pipe Flanges are made up of austenitic stainless steel with chromium and nickel as alloy material. Therefore Stainless Steel 316 Weld Neck Flanges are stronger and durable. For extended usage and for welding and strength, the A182 F316 Material is used.

ASTM A182 F316 Flange Chemical Composition

Chromium plays a key role in stainless steel.it can improving the corrosion resistance of the material. In ASTM A182 F316 flanges, this high chromium content enables it to resist a variety of corrosive environments.

Stainless Steel 316 Flange Mechanical Property

The yield strength of A182 F316 flange is generally not less than 205MPa. The yield strength is the stress value when the material begins to produce obvious plastic deformation. In the pipeline system, the flange needs to withstand a certain amount of pressure and tension. The yield strength ensures that the flange will not undergo excessive plastic deformation. The yield strength can ensure the stability of the pipeline connection.

ASTM A182 F316 Flange Dimension

ASTM A182 F316 flanges include threaded flanges, socket weld flanges, threaded flanges, blind flanges, lap joint flanges, weld neck flanges. The pressure ratings are 150#, 300#, 600#, 900#, 1500#, 2500#. The commonly used pressure is 150#.

Dimensions of Class 150 Flanges (Cont’d)

316 vs 316L Stainless Steel: What’s the Difference?

316 and 316L stainless steel are both marine-grade steels, but they do possess some key differences. 316L has a lower proportion of carbon in its composition. To qualify as 316L stainless steel, the amount of carbon cannot exceed 0.03%. This decreases the risk of carbon precipitation, making it a better option for welding to ensure maximum corrosion resistance. 

Stainless Steel 316 Flange Advantages

316 stainless steel has very low responsiveness to magnetic fields. Unlike basic stainless steels, which are ferromagnetic, most stainless steel varieties are austenitic — or effectively nonmagnetic.

ASTM A182 F316L Flange Advantages

However, some ASTM A182 F316 flanges can undergo processes, like cold forming and welding. The austenitic crystal structure is transformed into ferromagnetic martensite. 316L steel is more susceptible to gaining some degree of magnetism.

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ASTM A182 F316 Threaded Flange is manufactured according to ASME B16.5 standard and typically used in many industries like oil and gas.

Threaded Flange connects with Pipes, Valves, pumps and other equipment to form a piping system. It provides easy access for cleaning, inspection or modification. Flanged joints are made by bolting together two flanges with a Gasket between them to provide a seal.

ASME B16.5 Flange Dimension

What is the relation between Pressure and Sealing

1. RF threaded flange, 1/16 inch for 150lb and 300lb, 1/4 inch for 600lb and more.
2. FF threaded flange, for 150lb and 300lb only
3. RTJ threaded flange, covers all flange pressure ratings.

Stainless Steel Material for Flanges

SS316 is an Austenitic Cr-Ni stainless steel second only to F304 in commercial importance. It contains Molybdenum that gives  corrosion resistance, particularly pitting and crevice corrosion in Chloride environments. Stainless Steel Threaded Flange suits for all applications where requires corrosion resistance improvement .

So A182 F316 Threaded Flange has longer service life than other materials and they have smooth surface and beautiful appearance.

SS304/304L Flanges is another A182 stainless steel flange and manufactured according to ASME B16.5

A182 F316 Threaded Flange

A182 F316 Chemical composition %

A182 F316 Mechanical Property

Benefits and Drawbacks of A182 F316 Threaded Flange

Unlike welding flange, threaded flange serves small diameter pipe system more often. It has the advantages of easy installation and maintenance and suitable for somewhere can’t welding.

For alloy steel flanges which are not easy to weld or have poor welding performance, thread is the best choice.

Furthermore, when the stainless steel flange is welded, the carbon will be separated out by repeated heating. As the result, it improves the mechanical properties and corrosion resistance.

But in the conditions that pipe temperature changes sharply or temperature higher than 260 ℃ or below – 45 ℃, it is not your first choice for leakage proof.

Consider the structural characteristics of the threaded flange, it is not suitable for flammable, explosive and highly hazardous situations.  In contrast, it is safe to apply to low pressure pipe system, such as air conditioning water system.

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