Stainless Steel 316 Flanges

Stainless Steel 316 Flanges produced under the ASTM A182 specification are generally hot worked according to the details mentioned by the specification. These details ensure that these flanges are produced in such a manner that they are able to withstand high temperatures and have a specific target skill set.

Stainless Steel 316 Flanges

Therefore the ASME sa 182 f316 pipe flange is manufactured with strict adherence to the given instructions including the kind of heat treatment to be performed, austenitizing/solution temperature, cooling media, and quenching method as well. In order to carry out a hot working process on the ASTM a182 f316 flange, the material is required to be annealed at a minimum temperature of 1900°F. Annealing carried out in the range of 1900°F is what grants the alloy maximum resistance to corrosion. After annealing these flanges are to be quenched by water or they could be cooled rapidly using any techniques after being hot worked.

Most SS 316 flat face flange manufacturer in India will recommend using a Working temperature between the range of 1700°F – 2200°F for most hot working processes. The 316 stainless steel flanges make an excellent addition to the chemical processing industry. Often referred to as a sanitary material, grade 316 is an alloy that is known to offer great hygienic conditions. This being said, the SS 316 forged flange provides easy access to the factory worker to clean, inspect or modify the connection. When cleaning procedures are discussed, most of our clients appreciate the fact that cleaning the f316 weld neck flange is really easy. Since the alloy used to manufacture the UNS S31600 flange does not react badly with cleaning agents, there are no changes of any residual matter sticking on the surface of these flanges. Hence, as a result these flanges offer a smooth transition during the manufacture and processing of chemicals.


Stainless Steel 316 Flanges Specifications

Stainless Steel 316 Flanges size range 1/2 Inch (15 NB) to 48 Inch(1200NB)
ASTM A182 F316 Flange ANSI Standard 150, 300, 600, 900, 1500, 2500 LBS Classes
316 SS Blind Flange DIN Standard 6 to 40 Bar / PN 6 To Pn 64
SS 316 Flange JIS Standard 5, 10, 16, 20, 30, 40, 63 K

Equivalent grade of ASTM A182 F316 Flange

Stainless Steel 316 Flanges 1.4401 / 1.4436 S31600 SUS 316 316S31 / 316S33 - X5CrNiMo17-12-2 / X3CrNiMo17-13-3

316 SS Blind Flange Chemical Composition

Grade Carbon (C) Manganese (Mn) Silicon (Si) Phosphorus (P) sulphur (S) Chromium (Cr) Molybdenum (Mo) Nickel (Ni) Nitrogen (N)
SS 316 Flanges 0.08 Maximum 2.0 Maximum 1.0 Maximum 0.045 Maximum 0.030 Maximum 16.00 - 18.00 2.00 - 3.00 11.00 - 14.00 67.845 Minimum

A182 F316 Flange Mechanical Table

Density Melting Point Tensile Strength High Yield Strength Elongation
8.0 gram/cm3 1400 °C PSI 75000 PSi 30000 35 %

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How to weld 316 Flanges with pipe in marine application?

Flanges used for marine applications need to be durable, sturdy as well as resistant to corrosion. Since stainless steel grade, 316 is an alloy which checks all the boxes with regards to the property requirement pertaining to marine applications. The significant addition of molybdenum prevents stress related corrosion cracking as well as pitting, both of which are valued characteristics of marine grade steels.

Creating a permanent joint in flanges is usually performed by creating a weld. Although grade 316 flanges have good weldability properties after annealing (annealing prevents decaying of welded parts in alloy 316), having a reduced carbon content is what facilitates welding to be carried out without compromising its corrosion resistance properties.  Therefore, if welding operations are to be performed on the flanges the modified carbon containing alloy 316L is often used. The lower content of carbon would imply the formation of fewer carbides across a continuous network of depleted chromium. Moreover,  grade 316L could be dual certified as grade 316/316L, making it an ideal choice to be used in welding related operations.

Grade 316 is an alloy that exhibits excellent weldability properties, across most conventionally used fusion methods, both with as well as without filler metals. In order to achieve maximum resistance to corrosion, heavy welded sections of the pipes are to undergo a post-weld annealing treatment. This treatment is not required for grade 316L.