Good high temperature oxidation resistance to 2000°F

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  High temperature stability for moderate strength applications
• Good oxidation and carburization resistant to 2000°F
• Resistance to moderate sulfidation and nitriding
• Economic alternative to high temperature nickel alloys
• 310SS chemistry & specifications
• Features & benefits of 310SS slip on flanges
• Datasheet for 310 stainless steel

Designed for high temperature applications, 310 stainless steel slip on flanges provide high temperature oxidation resistance to 2000°F under mild cyclic conditions. An economic alternative to nickel alloys like alloy 330 or Inconel, 310 flanges provide slightly less strength and temperature resistance – but at a significantly lower price point.  Alloy 310 can be used in moderately caburizing, moderately oxidizing, nitriding, cementing and thermal cycling applications when not used at the maximum service temperature. 310SS slip on flanges also have good resistance to sulfidation and other forms of hot corrosion.  Although primarily known for its high temperature properties, 310 stainless steel also provides excellent performance at cryogenic temperatures, with toughness down to -450F. Though 310 slip on flanges are ideal for high temperature use, they should not be exposed to the severe thermal shock of repeated liquid quenching or where aqueous corrosive contaminants are present.

Benefits

• High temperature resistance.
• Excellent resistance to oxidation under mildly cyclic conditions.
• Good resistance to sulfidation and atmospheres where sulfur dioxide gas is encountered at elevated temperatures.
• Good resistance to thermal fatigue.
• Excellent toughness to cryogenic temperatures of -450°F.
• Low magnetic permeability.
• Good ductility and weldability.

Applications

• Thermal processing and high temperature furnaces rely on 310 flanges for their high temperature and oxidation resistance in minor cyclic conditions.
• 310SS slip on flanges are commonly used in the petrochemical industry for their ability to provide resistance to moderately carburizing atmospheres.
• The high temperature properties of 310 flanges make them ideal for ore processing, steel plants, power generation, and sintering.
• Cryogenic structures often use 310 stainless steel slip on flanges for their strength at -450°F and low magnetic permeability.

Resources: Flange Dimensions, Flange Bolting Chart

Alloy 310 Bolt Types:  Blind Flanges, Lap Joint Flanges, Slip On Flanges, Socket Weld Flanges, Threaded Flanges, Weld Neck Flanges

310 Stainless Steel Chemistry & Specifications

310SS Specifications: AMS 5521, AMS 5651, ASME SA 240, ASME SA 312, ASME SA 479, ASTM A 240, ASTM A 276, ASTM A 276 Condition A, ASTM A 276 Condition S, ASTM A 312, ASTM A 479, EN 10095, UNS S31008, UNS S31009, Werkstoff 1.4845

310SS Slip on Flange Features & Benefits

310 slip on flanges are similar to the socket weld flange but without the socket shoulder. When using a socket weld flange, the pipe rests against this internal shoulder. Since a slip on flange does not have shoulder, the pipe can slide completely through the flange hub and is free to spin. 

Advantages

• Typically lower in price than weld-neck flange, yet welding costs can be more.
• There is a reduced need to cut the pipe length accurately, making it easier to install.
• The slip on flange is free to spin on the pipe for easy bolt alignment.

Disadvantages

• They require two fillet welds: one fillet weld at the hub of the flange and a second weld at the inside diameter of the flange near the flange face.
• Though they can be used for high temperature and pressure applications, they typically are not as other flange types give a more secure joint.