Stainless Steel 316 & 316L Flanges

 

Introduction

Stainless Steel 316 (SS 316) and Stainless Steel 316L (SS 316L) are widely used austenitic stainless steel grades known for their enhanced corrosion resistance, high strength, and excellent durability. These grades are commonly used in marine, chemical processing, food, and pharmaceutical industries due to their superior resistance to chloride and acidic environments.

What is SS 316 & SS 316L?

  • SS 316: A molybdenum-bearing stainless steel that offers superior resistance to pitting and crevice corrosion.

  • SS 316L: A low-carbon variant of SS 316, designed for improved weldability and corrosion resistance, especially in high-temperature environments.

SS 316 Flange Material & Specifications

SS 316 and SS 316L flanges are manufactured under ASTM A182 standards and are suitable for various industrial applications requiring high strength and corrosion resistance.

SS 316 Flange Specifications

  • Material Standard: ASTM A182 F316 / F316L

  • Pressure Ratings: ANSI Class 150, 300, 600, 900, 1500, 2500

  • Flange Types: Slip-on, Weld Neck, Blind, Threaded, Socket Weld, Lap Joint, Spectacle Blind, SORF (Slip-On Raised Face)

  • Face Type: Raised Face (RF), Flat Face (FF), Ring-Type Joint (RTJ)

SS 316 Flange Dimensions & Weight Charts

Stainless Steel Flange Dimensions Chart (PDF)

To view the complete SS 316 flange dimensions chart, refer to manufacturer datasheets or download ASME B16.5 / B16.47 standards.

SS 316 Class 150 Flange Dimensions

Size (inches)Outside Diameter (OD)Bolt Circle DiameterBolt Hole SizeNumber of Bolts
1/2"3.50"2.38"0.62"4
1"4.25"3.12"0.62"4
2"6.00"4.75"0.75"4
4"9.00"7.50"0.75"8

SS 316L Flange Weight Chart

Flange Size (Inches)Weight (kg)
1/2"1.5
1"2.5
2"5.8
4"12.0

316 Stainless Steel Flange Pressure Rating

SS 316 and SS 316L flanges are available in different pressure classes ranging from 150 to 2500 ANSI ratings.

  • Class 150: Suitable for pressures up to 285 psi at 100°F.

  • Class 300: Can withstand pressures up to 740 psi at 100°F.

  • Class 600: Rated for 1,480 psi at 100°F.

ASTM A182 SS 316 & F316 PDF

ASTM A182 defines the standard specifications for forged or rolled alloy and stainless steel pipe flanges, fittings, valves, and parts. The F316 and F316L variants offer superior properties for high-pressure and high-temperature applications.

FAQs

1. What is the difference between SS 316 and SS 316L?

SS 316L has a lower carbon content than SS 316, which enhances its weldability and corrosion resistance in chloride-rich environments.

2. What is a 316L flange made of?

SS 316L flanges are made of low-carbon stainless steel, which improves weldability and corrosion resistance.

3. What is the ASTM standard for SS 316 flanges?

The standard specification is ASTM A182 F316 / F316L.

4. What is SS 316 commonly called?

SS 316 is also referred to as marine-grade stainless steel due to its excellent resistance to seawater and chloride environments.

5. What are the standard SS 316 flange dimensions?

SS 316 flange dimensions follow ASME B16.5 and ASME B16.47 standards.

6. What is the pressure rating of a 316 stainless steel flange?

SS 316 flanges are available in ANSI 150 to 2500 pressure ratings, with Class 150 rated for 285 psi at 100°F.

7. What is the function of a SORF flange?

SORF (Slip-On Raised Face) flanges are used for easy installation and cost-effective piping connections in moderate pressure applications.

8. Where can I get the SS 316 flange weight chart?

You can find the SS 316 and SS 316L flange weight charts in manufacturer catalogs or ASME B16.5 datasheets.

9. What is the difference between F316 and F316L?

F316L has lower carbon content than F316, making it more resistant to intergranular corrosion after welding.

10. What are the typical applications of SS 316 flanges?

SS 316 flanges are widely used in oil & gas, marine, food processing, pharmaceuticals, and high-pressure piping systems.

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