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Understanding ASTM A182 F316 Flanges
The chemical composition of Stainless Steel 316 flanges is unique as it contains 16-18% of chromium, 10-14% of nickel, and a very important addition of 2-3 percent of molybdenum. Copper and silica as well as phosphorus are also present in small quantities in this composition. The greater level of chromium is what gives it exceptional resistance to corrosion in a wide range of environments. Moreover, this grade is preferred as it has favorable welding and forming properties into other shapes.
UNS S31600 SS 316 grade is an austenitic stainless steel, that is, its crystal structure makes it strong and high temperature resistant. The most important component of 316 that grants it the status of 304 is the incorporation of molybdenum (approximately 4% in the entire alloy). This molybdenum concentration goes a long way up to enhance the physical as well as mechanical properties, specifically its resistance to pitting corrosion in chloride environments. Being a popular and reliable product, SS 316 flanges are under the ASTM A182 specification, that deals with forged or rolled alloy steel pipe flanges.
Stainless Steel flanges come in many variations and pressure classes to suit industrial needs. Standard classes range from 150 up to 2500, with classes like Class 150 ANSI SS 316 Flanges being very common. The product types include the SS 316 Slip On Flange, often used with seamless pipes where the ability to adjust the pipe position before welding is beneficial. Other essential types are the ASME SA182 SS 316 Weld Neck Flange for high-pressure systems, the ANSI B16.5 SS 316 Blind Flange used to seal off a pipe end, and the Stainless Steel 316 RTJ Flange which uses a special joint design for enhanced sealing. The industry standard, ANSI B16.5, defines the dimensions for flanges from 1/2 inch to 48 inches. Choosing the correct flange type, such as the SS 316 Socket Weld Flange, is critical for meeting the specific requirements of any piping system.
Request SS 316 Flanges Quote !Table of Contents
- Stainless Steel 316 Flanges Manufacturer and Supplier
- 316 Stainless Steel Flanges Specifications
- Stainless Steel 316 Flanges Chemical Composition
- SS 316 Flanges Mechanical Properties
- DIN 1.4401 Forged Flanges Physical Properties
- UNS S31600 Stainless Steel Flanges Equivalent Grades
- ASME SA182 Stainless Steel 316 Weld Neck Flange Sizes
- Stainless Steel F316 Flanges Dimensions
- ASTM A182 F316 Flanges Weight Chart
- SS 316 Flanges Surface Finishes
- 316 Stainless Steel Flanges
- Stainless Steel 316 Flanges HSN Code
- Applications of 316 Stainless Steel Flanges
- Stainless Steel 316 Flanges Price List
- FAQs About Stainless Steel 304 Tubes
A182 F316 Slip On Flange, ASME SA182 SS 316 Weld Neck Flange, ASTM A182 F316 BLRF Flange Manufacturer and Supplier
As a leading manufacturer and supplier of SS 316 Flanges, Solitaire Overseas specializes in providing products across various standards and scales, including popular types like the A182 F316 Slip On Flange, the ASME SA182 SS 316 Weld Neck Flange, and the ASTM A182 F316 BLRF (Blind Raised Face) Flange. Our inventory covers the essential flange types such as blind, slip-on, weld neck, and plate flanges each engineered to fulfill a distinct and critical function within industrial piping systems.
For more information and pricing on Stainless Steel 316 Flanges, please contact us directly.
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316 Stainless Steel Flanges Specifications
The table below outlines the key technical specifications for 316 stainless steel flanges.
| Category | Specification Details |
|---|---|
| Size | 1/8" NB - 24" NB |
| Standard | ASME B16.5 |
| Pressure Rating | Class 150 - 2500 |
| PN Range | PN6 - PN64 |
| Face Type | FF / RF / RTJ |
| Process | Forging / Casting |
| MTC Certificate | EN 10204 3.1 & 3.2 |
| Flange finish | Smooth / Serrated |
| Types | Blind, Weld Neck, Slip-on, Socket Weld, Threaded and Lap Joint |
Stainless Steel 316 Flanges Chemical Composition
The distinct corrosion resistance of 316 stainless steel flanges is defined by the following chemical composition, particularly the inclusion of Molybdenum.
| Grade | C | Mn | Si | P | S | Cr | Mo | Ni | Fe |
|---|---|---|---|---|---|---|---|---|---|
| 316 | 0.08 max | 2.0 max | 1.0 max | 0.045 max | 0.030 max | 16.00 – 18.00 | 2.00 – 3.00 | 11.00 – 14.00 | 67.845 min |
SS 316 Flanges Mechanical Properties
Here are the standard mechanical properties for SS 316 flange material, which determine its strength and performance under stress.
| Density | Melting Point | Tensile Strength | Yield Strength (0.2% Offset) | Elongation |
|---|---|---|---|---|
| 8.0 g/cm³ | 1400°C (2550°F) | 75,000 PSI / 515 MPa | 30,000 PSI / 205 MPa | 35% |
DIN 1.4401 Forged Flanges Physical Properties
The table below details the physical properties, such as thermal and electrical characteristics, of astm a182 316 material (DIN 1.4401).
| Grade | Density (kg/m³) | Elastic Modulus (GPa) | Mean Co-eff of Thermal Expansion (µm/m/°C) | Thermal Conductivity (W/m·K) | Specific Heat 0–100°C (J/kg·K) | Electrical Resistivity (nΩ·m) |
|---|---|---|---|---|---|---|
| 316 | 8000 | 193 | 15.9 (0–100°C)16.2 (0–315°C)17.5 (0–538°C) | 16.3 (at 100°C)21.5 (at 500°C) | 500 | 740 |
UNS S31600 Stainless Steel Flanges Equivalent Grades
This table lists the common equivalent international grades for the UNS S31600 designation.
| Standard | Werkstoff Nr. | UNS | JIS | BS | GOST | AFNOR | EN |
|---|---|---|---|---|---|---|---|
| 316 | 1.4401 / 1.4436 | S31600 | SUS 316 | 316S31 / 316S33 | – | Z7CND17-11-02 | X5CrNiMo17-12-2 / X3CrNiMo17-13-3 |
ASME SA182 Stainless Steel 316 Weld Neck Flange Sizes
The following resources provide detailed size charts for the ASME SA182 Stainless Steel 316 Weld Neck Flange (NPS 1/2" - 24").
| Nominal Pipe Size | Outside Diameter of Flange | Thickness of Flange | Diameter of Raised Face | Diameter of Hub at Base | Length Thru Hub | Diameter or Bore | Diameter of Hub at Bevel | Radius of Fillet | Depth of Socket | |||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Welding Neck | Slip-On Threaded Socket | Lap Joint | Slip-on Socket | Lap Joint | ||||||||
| O | Q | R | X | Y | Y | Y | W | B | H | r | Z | |
| 1/2 | 3-1/2 | 7/16 | 1-3/8 | 1-3/16 | 1-7/8 | 5/8 | 5/8 | .88 | .90 | .84 | 1/8 | 3/8 |
| 3/4 | 3-7/8 | 1/2 | 1-11/16 | 1-1/2 | 2-1/16 | 5/8 | 5/8 | 1.09 | 1.11 | 1.05 | 1/8 | 7/16 |
| 1 | 4-1/4 | 9/16 | 2 | 1-15/16 | 2-3/16 | 11/16 | 11/16 | 1.36 | 1.38 | 1.32 | 1/8 | 1/2 |
| 1-1/4 | 4-5/8 | 5/8 | 2-1/2 | 2-5/16 | 2-1/4 | 13/16 | 13/16 | 1.70 | 1.72 | 1.66 | 3/16 | 9/16 |
| 1-1/2 | 5 | 11/16 | 2-7/8 | 2-9/16 | 2-7/16 | 7/8 | 7/8 | 1.95 | 1.97 | 1.90 | 1/4 | 5/8 |
| 2 | 6 | 3/4 | 3-5/8 | 3-1/16 | 2-1/2 | 1 | 1 | 2.44 | 2.46 | 2.38 | 5/16 | 11/16 |
| 2-1/2 | 7 | 7/8 | 4-1/8 | 3-9/16 | 2-3/4 | 1-1/8 | 1-1/8 | 2.94 | 2.97 | 2.88 | 5/16 | 3/4 |
| 3 | 7-1/2 | 15/16 | 5 | 4-1/4 | 2-3/4 | 1-3/16 | 1-3/16 | 3.57 | 3.60 | 3.50 | 3/8 | 13/16 |
| 3-1/2 | 8-1/2 | 15/16 | 5-1/2 | 4-13/16 | 2-13/16 | 1-1/4 | 1-1/4 | 4.07 | 4.10 | 4.00 | 3/8 | 7/8 |
| 4 | 9 | 15/16 | 6-3/16 | 5-5/16 | 3 | 1-5/16 | 1-5/16 | 4.57 | 4.60 | 4.50 | 7/16 | 15/16 |
| 5 | 10 | 15/16 | 7.5/16 | 6-7/16 | 3-1/2 | 1-7/16 | 1-7/16 | 5.66 | 5.69 | 5.56 | 7/16 | 15/16 |
| 6 | 11 | 1 | 8-1/2 | 7-9/16 | 3-1/2 | 1-9/16 | 1-9/16 | 6.72 | 6.75 | 6.63 | 1/2 | 1-1/16 |
| 8 | 13-1/2 | 1-1/8 | 10-5/8 | 9-11/16 | 4 | 1-3/4 | 1-3/4 | 8.72 | 8.75 | 8.63 | 1/2 | 1-1/4 |
| 10 | 16 | 1-3/16 | 12-3/4 | 12 | 4 | 1-15/16 | 1-15/16 | 10.88 | 10.92 | 10.75 | 1/2 | 1-5/16 |
| 12 | 19 | 1-1/4 | 15 | 14-3/8 | 4-1/2 | 2-3/16 | 2-3/16 | 12.88 | 12.92 | 12.75 | 1/2 | 1-9/16 |
| 14 | 21 | 1-3/8 | 16-1/4 | 15-3/4 | 5 | 2-1/4 | 3-1/8 | 14.14 | 14.18 | 14.00 | 1/2 | 1-5/8 |
| 16 | 23-1/2 | 1-7/16 | 18-1/2 | 18 | 5 | 2-1/2 | 3-7/16 | 16.16 | 16.19 | 16.00 | 1/2 | 1-3/4 |
| 18 | 25 | 1-9/16 | 21 | 19-7/8 | 5-1/2 | 2-11/16 | 3-13/16 | 18.18 | 18.20 | 18.00 | 1/2 | 1-15/16 |
| 20 | 27-1/2 | 1-11/16 | 23 | 22 | 5-11/16 | 2-7/8 | 4-1/16 | 20.20 | 20.25 | 20.00 | 1/2 | 2-1/8 |
| 24 | 32 | 1-7/8 | 27-1/4 | 26-1/8 | 6 | 3-1/4 | 4-3/8 | 24.25 | 24.25 | 24.00 | 1/2 | 2-1/2 |
Stainless Steel F316 Flanges Dimensions
Refer to the source below for detailed dimensional tables and standards for Stainless Steel F316 Flanges.
| Standard | Class | Diameter | Bolt Circle Diameter | Number of Bolts | Bolt Size | Diameter of Bolt Hole |
|---|---|---|---|---|---|---|
| AS4087 | PN14 | 95 | 67 | 4 | M12 | 14 |
| AS 2129 Flange | Table C | 95 | 67 | 4 | 13 | 14 |
| Table D | 95 | 67 | 4 | 13 | 14 | |
| Table E | 95 | 67 | 4 | 13 | 14 | |
| Table F | 95 | 67 | 4 | 13 | 14 | |
| Table H | 114 | 83 | 4 | 16 | 17 | |
| Table J | 114 | 83 | 4 | 16 | 17 | |
| ANSI B16.5 | ANSI 150 | 89 | 60 | 4 | 13 | 16 |
| ANSI 300 | 95 | 67 | 4 | 13 | 16 | |
| ANSI 600 | 95 | 67 | 4 | 13 | 16 | |
| ANSI 900 | 121 | 83 | 4 | 19 | 22 | |
| ANSI 1500 | 121 | 83 | 4 | 19 | 22 | |
| ISO 7005 (DIN) Flange | PN6 | 80 | 55 | 4 | M10 | 11 |
| PN10 | 95 | 65 | 4 | M12 | 14 | |
| PN16 | 95 | 65 | 4 | M12 | 14 | |
| PN20 | 90 | 60.5 | 4 | M14 | 16 | |
| PN25 | 95 | 65 | 4 | M12 | 14 | |
| PN40 | 95 | 65 | 4 | M12 | 14 |
ASTM A182 F316 Flanges Weight Chart
The below table contains the standard weight charts for ASTM A182 F316 Flanges.
| Standard | Class | Diameter | Bolt Circle Diameter | Number of Bolts | Bolt Size | Diameter of Bolt Hole |
|---|---|---|---|---|---|---|
| AS4087 | PN14 | 95 | 67 | 4 | M12 | 14 |
| AS 2129 Flange | Table C | 95 | 67 | 4 | 13 | 14 |
| Table D | 95 | 67 | 4 | 13 | 14 | |
| Table E | 95 | 67 | 4 | 13 | 14 | |
| Table F | 95 | 67 | 4 | 13 | 14 | |
| Table H | 114 | 83 | 4 | 16 | 17 | |
| Table J | 114 | 83 | 4 | 16 | 17 | |
| ANSI B16.5 | ANSI 150 | 89 | 60 | 4 | 13 | 16 |
| ANSI 300 | 95 | 67 | 4 | 13 | 16 | |
| ANSI 600 | 95 | 67 | 4 | 13 | 16 | |
| ANSI 900 | 121 | 83 | 4 | 19 | 22 | |
| ANSI 1500 | 121 | 83 | 4 | 19 | 22 | |
| ISO 7005 (DIN) Flange | PN6 | 80 | 55 | 4 | M10 | 11 |
| PN10 | 95 | 65 | 4 | M12 | 14 | |
| PN16 | 95 | 65 | 4 | M12 | 14 | |
| PN20 | 90 | 60.5 | 4 | M14 | 16 | |
| PN25 | 95 | 65 | 4 | M12 | 14 | |
| PN40 | 95 | 65 | 4 | M12 | 14 |
SS 316 Flanges Surface Finishes
SS 316 RTJ flanges and other types come with several surface finishes, which include:
- Mill Finishes: This is the standard finish suitable for most common applications, such as for the Inox 316 SORF flange. It is also frequently used before further processes like mechanical polishing.
- No. 1 Finish: This finish is created by hot rolling the UNS S31600 flanges, followed by annealing and then pickling in acid. The process results in a dull surface finish, making it highly suitable for high-temperature applications.
- 2D Finish: In contrast to the No. 1 finish, the 2D finish is achieved through cold rolling for the SS 316 RTJ flange. Like the No. 1 finish, it is then annealed and pickled. This finish is commonly found in chemical equipment, hardware, and automotive exhaust components.
316 Stainless Steel Flanges
The 316 stainless steel flange is available in several configurations, each suited for a specific piping connection and pressure requirement:
Stainless Steel 316 Blind Flange
- 150#
- 300#
- 600#
316 Stainless Steel Sip on flange
- Flat face
- Raised face
- Ring joint
UNS S31600 Forged Flange
- Lap joint
- Male and female
- Tongue and groove
Inox 316 Weld Neck Flange
- Class 900
- Class 1500
- Class 2500
DIN 1.4401 Socket Weld Flange
- ASME B16.5
- ANSI B16.5
- ASME B16.47
- ANSI B16.47
AISI 316 RTJ Flange
- Stock Finish
- Smooth Finish
Stainless Steel 316 Flanges HSN Code
| Product | Material | HSN Code |
|---|---|---|
| Stainless Steel Flanges | Stainless Steel | 73072100 |
Applications of 316 Stainless Steel Flanges
316 Stainless Steel Flanges are utilized in highly demanding industrial environments where superior corrosion resistance and strength are critical. Key applications include:
- Nuclear power (primarily requiring seamless components)
- Bitumen upgraders
- Petrochemicals and acids handling
- Heavy oil refineries
Tests Performed on SS 316 Flanges - Quality Assurance
To guarantee robust mechanical properties and ensure compliance with industrial demands, SS 316 lap joint flanges and other types must undergo rigorous testing. These quality assurance checks confirm the flange will perform reliably across various industries and applications.
The essential tests performed include:
- NDT (Non-Destructive Testing)
- Ultrasonic testing
- Eddy-current testing
- Radiograph test
For a comprehensive list of all tests conducted on our 316 stainless steel plate flanges, please refer to the detailed Quality Policy information available on our website.
Related Products of 316 Stainless Steel
Stainless Steel 316 Flanges Price List
| SIZE | Saudi Riyal | USD |
|---|---|---|
| 1/2″ #150 WNRF flange | 30.17 SAR | $7.92 |
| 1/2″ #300 weld neck flange | 45.71 SAR | $12.00 |
| 1/2″ #600 weld neck flange | 59.43 SAR | $15.60 |
Please note: This is a partial price list. Check the latest price list of stainless steel 316 flange by contacting us directly for the most current and complete pricing information.
Request SS 316 Flanges Quote !Frequently Asked Questions About Stainless Steel 316 Flanges
Yes, the SS 316 blind flange exhibits excellent corrosion resistance properties in a wide range of environments. It is often considered a more prominent choice than the 304 grade in warm environments because it shows resistance to both crevice corrosion and pitting.
If you are purchasing SS Grade F316 socket weld flanges, they are observed to come in the size range of 1/2 inch to 48 inches. This size range provides a variety of options, allowing you to choose the desired size according to your specific needs and standards.
The choice between stainless steel 304 and 316 flanges depends on the application, as neither is universally superior. SS 316 is generally better for highly corrosive environments—especially those involving chlorides, like marine or chemical processing—due to the addition of Molybdenum, which makes it highly resistant to pitting and crevice corrosion. However, SS 304 is the more economical and common choice for general-purpose applications where the environment is less aggressive and does not involve significant exposure to salt or harsh chemicals. Therefore, you should choose 304 for cost-effectiveness and standard use, and 316 when maximum corrosion resistance is essential.
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