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Stainless Steel 316L Flanges

Stainless Steel 316L Flanges

Stainless Steel 316L Flanges are pipe connection components manufactured from UNS S31603, a low-carbon austenitic stainless steel alloyed with molybdenum (2–3%). The "L" designation indicates carbon capped at 0.03%, which prevents sensitisation and intergranular corrosion during and after welding, making 316L the preferred choice wherever flanges are welded into service without post-weld heat treatment.

These flanges are available in all conventional face types, pressure classes, and flange forms. They are reliable in chloride-bearing, acidic, and marine situations without the need for additional coatings. The corrosion resistance, weldability, and widespread availability make them a standard specification in chemical processing, pharmaceuticals, food processing, oil and gas, and marine applications.

Price of Stainless Steel 316L Flanges

Get the most competitive Stainless Steel 316L Flanges price for your next project. Many Stainless Steel 316L flanges suppliers provide this updated price list for low-carbon, corrosion-resistant flanges widely used in marine and heavy-welding applications.

Price Per Unit / Kg

In India, the price of SS 316L Flanges is between ₹300 and ₹890/kg. International prices are linked to LME nickel and molybdenum rates. The heavier flanges and higher pressure classes cost proportionally more per kg due to the increased forging and machining required.

Factors Affecting Price

The concentration of nickel and molybdenum is the main cost driver for raw materials for 316L. Pressure class, kind of facing, size, and surface finish determine ultimate pricing. ASTM or PED-approved material will command a premium over non-certified supply. Bulk orders from a certified source mean reduced per-unit expenses.

Types of Stainless Steel 316L Flanges

Explore the various configurations available in low-carbon material for superior weldability. Here are the primary types of Stainless Steel 316L Flanges available:

  • Stainless Steel 316L Weld Neck Flanges (WN)
  • Stainless Steel 316L Slip-On Flanges (SO)
  • Stainless Steel 316L Blind Flanges (BL)
  • Stainless Steel 316L Socket Weld Flanges (SW)
  • Stainless Steel 316L Threaded Flanges (TH)
  • Stainless Steel 316L Lap Joint Flanges (LJ)
  • Stainless Steel 316L Long Weld Neck Flanges (LWN)
  • Stainless Steel 316L Orifice Flanges
  • Stainless Steel 316L Reducing Flanges
  • Stainless Steel 316L Spectacle Blind Flanges
  • Stainless Steel 316L Ring Type Joint (RTJ) Flanges

Specifications of Stainless Steel 316L Flanges

The specifications of Stainless Steel 316L Flanges, including size, standard, and pressure class, are listed in the table below.

Feature

Details

Standards

ASTM A182/ASME SA 182

Pressure Ratings (ANSI)

Class 150, 300, 600, 900, 1500, and 2500

Common Forms

Forged, Plate, Threaded, Screwed

Production Technique

Forged, heat-treated, and precision-machined

Key Equipment

Press machines, Pushing machines, Bending machines, Electric bevelling, Sand-blasting units

Chemical Properties of Stainless Steel 316L Flanges

The chemical composition of Stainless Steel 316L Flanges, including its proportions, is listed in the table below.

Grade

C

Mn

Si

P

S

Cr

Mo

Ni

N

316L Min

16.0

2.0

10.0

316L Max

0.03

2.0

0.75

0.045

0.030

18.0

3.0

14.0

0.10

Mechanical Properties of Stainless Steel 316L Flanges

The following table briefly explains the mechanical properties of Stainless Steel 316L flanges, such as tensile strength, yield strength, and elongation.

Property

Value

Tensile Strength

485 MPa min

Yield Strength (0.2% Offset)

170 MPa min

Elongation (% in 50 mm)

40% min

Hardness (Brinell)

217 HB max

Physical Properties of Stainless Steel 316L Flanges

The physical properties of Stainless Steel 316L Flanges are listed in the table below, along with density and thermal conductivity.

Grade

Density (kg/m³)

Elastic Modulus (GPa)

Mean Co-eff of Thermal Expansion (µm/m/°C) 0–100°C

Thermal Conductivity (W/m.K) at 100°C

Specific Heat (J/kg.K)

Elec Resistivity (nΩ.m)

316L

8000

193

15.9

16.3

500

740

Dimension Chart of Stainless Steel 316L Flanges

Consult the chart below for the standard dimensions of Class 150 flanges, ensuring precise alignment and fit for your piping system.

NPS

Outside Dia (O)

Thickness (Q)

Raised Face Dia (R)

Hub Base (X)

WN Length (Y)

SO/TH/SW Length (Y)

Bore (B)

1/2"

3.50

0.44

1.38

1.19

1.88

0.62

0.62

3/4"

3.88

0.50

1.69

1.50

2.06

0.62

0.82

1"

4.25

0.56

2.00

1.94

2.19

0.69

1.05

1-1/4"

4.62

0.62

2.50

2.31

2.25

0.81

1.38

1-1/2"

5.00

0.69

2.88

2.56

2.44

0.88

1.61

2"

6.00

0.75

3.62

3.06

2.50

1.00

2.07

2-1/2"

7.00

0.88

4.12

3.56

2.75

1.12

2.47

3"

7.50

0.94

5.00

4.25

2.75

1.19

3.07

4"

9.00

0.94

6.19

5.31

3.00

1.31

4.03

6"

11.00

1.00

8.50

7.56

3.50

1.56

6.07

8"

13.50

1.12

10.62

9.69

4.00

1.75

7.98

10"

16.00

1.19

12.75

12.00

4.00

1.94

10.02

12"

19.00

1.25

15.00

14.38

4.50

2.19

12.00

14"

21.00

1.38

16.25

15.75

5.00

2.25

13.25

16"

23.50

1.44

18.50

18.00

5.00

2.50

15.25

20"

27.50

1.69

23.00

22.00

5.69

2.88

19.25

24"

32.00

1.88

27.25

26.12

Dimensions per ASME B16.5 Class 150. Confirm dimensions for other pressure classes with your supplier.

Size Chart of Stainless Steel 316L Flanges

Refer to the table below to verify the specific size ranges and pressure ratings available across various international dimensional standards.

Dimension Standard

Size Range

Rating / Class

ASME / ANSI B16.5

1/2” to 24”

Class 150 to 2500 Lbs

ASME B16.47 / API 605

26” to 60”

Class 150 to 900 Lbs

MSS-SP-44

12” to 60”

Class 150 to 900 Lbs

ASME / ANSI B16.36

1” to 24”

Class 300 to 2500 Lbs

ASME B16.48 / API 590

1/2” to 24”

Class 150 to 2500 Lbs

API 6A

2 1/16” to 30”

2000 Psi to 20000 Psi

BS 3293

26” to 48”

Class 150 to 600 Lbs

DIN / EN 1092-1

DN10 to DN3600

PN6 to PN160

Pressure Rating Chart of Stainless Steel 316L Flanges

This SS 316L pressure chart helps engineers select safe flange ratings at varying temperatures.

Temperature (°F)

400#

2500#

900#

1500#

150#

300#

600#

500

620

3880

1395

2330

170

465

930

-20 to 100

960

6000

2160

3600

275

720

1440

650

575

3580

1290

2150

125

430

860

600

580

3640

1310

2185

140

435

875

800

540

3360

1210

2015

90

425

905

200

800

5000

1800

3000

230

600

1200

1250

150

945

340

565

20

115

225

1050

410

2570

925

1545

20

310

615

650

575

3580

1290

2150

125

430

860

300

720

4500

1620

2700

205

540

1080

400

660

4140

1490

2485

190

495

995

1100

345

2145

770

1285

20

255

515

1200

205

1285

465

770

20

155

310

1000

430

2675

965

1605

20

320

640

850

530

3300

1190

1980

65

395

790

900

520

3240

1165

1945

50

390

780

750

555

3460

1245

2075

95

415

830

1400

65

400

145

240

20

50

95

700

565

3540

1275

2125

110

425

850

1150

265

1655

595

995

20

200

400

1450

45

285

105

170

15

35

70

950

510

3180

1145

1910

35

380

765

1350

80

515

185

310

20

60

125

1300

115

715

255

430

20

85

170

1500

35

230

80

135

10

25

55

Pressure ratings per ASME B16.5 for Group 2.3 (316L). Actual ratings depend on temperature; always verify with the relevant table for your service condition.

Key Features of Stainless Steel 316L Flanges

Review the core performance advantages of this low-carbon material. Explore the primary features of Stainless Steel 316L Flanges below:

  • Low Carbon
  • Corrosion Resistance
  • Non-Magnetic
  • Cryogenic Toughness
  • Weld Compatibility
  • Facing Options
  • Industrial Durability
  • Standard Compliance

Applications of Stainless Steel 316L Flanges

Discover the specialised industrial sectors where these low-carbon components are essential. Below are the primary applications for Stainless Steel 316L Flanges:

  • Chemical Processing
  • Pharmaceutical Manufacturing
  • Food & Beverage
  • Offshore Energy
  • Desalination Plants
  • Marine & Shipbuilding
  • Petrochemical Systems
  • Pulp & Paper
  • Architectural Piping
  • Cryogenic Systems

How to Choose the Right Stainless Steel 316L Flanges Supplier?

Please refer to the following pointer before placing the order for Stainless Steel 316L Flanges, as it will help you to select the material as per your project requirements.

Supplier Selection Criteria

Verify the supplier provides mill test certificates with full heat and lot traceability. 316L is regularly misrepresented or supplied with carbon above the 0.03% L-grade limit. Check the carbon value on the MTC before accepting material. Request EN 10204 3.1 as a minimum; EN 10204 3.2 is required for pressure equipment and ASME-stamped systems.

Technical Considerations

Confirm the flange standard and pressure class before ordering. ASME B16.5 covers up to 24" NB, ASME B16.47 covers 26" and above. Verify the facing type (RF, FF, RTJ) matches your gasket and mating flange. For ASME-coded pressure systems, ensure material is certified to ASTM A182 F316L, not a generic "SS 316L bar"; the forging and testing requirements differ.

Quality & Certification Check

Prefer vendors with ISO 9001:2015 certification and capability to do third-party inspection via SGS, BV, TUV, or Lloyds. European PED-compliant projects confirm EN 1092-1 documentation available. Flanges shall be supplied in the solution annealed condition. Heat treatment records shall be included in all documentation packages.

Procurement Tips for Bulk Orders

Consolidate flange types, sizes, and pressure classes with one supplier to reduce documentation and enhance pricing. A vendor-qualified supplier decreases recurring overhead for quality verification for continuing procurement. For first-time procurement, always compare MTCs from two to three vendors to check material and benchmark pricing.

Stainless Steel 316L Flanges are pipe connection components manufactured from UNS S31603, a low-carbon austenitic stainless steel alloyed with molybdenum (2–3%). The "L" designation indicates carbon capped at 0.03%, which prevents sensitisation and intergranular corrosion during and after welding, making 316L the preferred choice wherever flanges are welded into service without post-weld heat treatment.

These flanges are available in all conventional face types, pressure classes, and flange forms. They are reliable in chloride-bearing, acidic, and marine situations without the need for additional coatings. The corrosion resistance, weldability, and widespread availability make them a standard specification in chemical processing, pharmaceuticals, food processing, oil and gas, and marine applications.

Price of Stainless Steel 316L Flanges

Get the most competitive Stainless Steel 316L Flanges price for your next project. Many Stainless Steel 316L flanges suppliers provide this updated price list for low-carbon, corrosion-resistant flanges widely used in marine and heavy-welding applications.

Price Per Unit / Kg

In India, the price of SS 316L Flanges is between ₹300 and ₹890/kg. International prices are linked to LME nickel and molybdenum rates. The heavier flanges and higher pressure classes cost proportionally more per kg due to the increased forging and machining required.

Factors Affecting Price

The concentration of nickel and molybdenum is the main cost driver for raw materials for 316L. Pressure class, kind of facing, size, and surface finish determine ultimate pricing. ASTM or PED-approved material will command a premium over non-certified supply. Bulk orders from a certified source mean reduced per-unit expenses.

Types of Stainless Steel 316L Flanges

Explore the various configurations available in low-carbon material for superior weldability. Here are the primary types of Stainless Steel 316L Flanges available:

  • Stainless Steel 316L Weld Neck Flanges (WN)
  • Stainless Steel 316L Slip-On Flanges (SO)
  • Stainless Steel 316L Blind Flanges (BL)
  • Stainless Steel 316L Socket Weld Flanges (SW)
  • Stainless Steel 316L Threaded Flanges (TH)
  • Stainless Steel 316L Lap Joint Flanges (LJ)
  • Stainless Steel 316L Long Weld Neck Flanges (LWN)
  • Stainless Steel 316L Orifice Flanges
  • Stainless Steel 316L Reducing Flanges
  • Stainless Steel 316L Spectacle Blind Flanges
  • Stainless Steel 316L Ring Type Joint (RTJ) Flanges

Specifications of Stainless Steel 316L Flanges

The specifications of Stainless Steel 316L Flanges, including size, standard, and pressure class, are listed in the table below.

Feature

Details

Standards

ASTM A182/ASME SA 182

Pressure Ratings (ANSI)

Class 150, 300, 600, 900, 1500, and 2500

Common Forms

Forged, Plate, Threaded, Screwed

Production Technique

Forged, heat-treated, and precision-machined

Key Equipment

Press machines, Pushing machines, Bending machines, Electric bevelling, Sand-blasting units

Chemical Properties of Stainless Steel 316L Flanges

The chemical composition of Stainless Steel 316L Flanges, including its proportions, is listed in the table below.

Grade

C

Mn

Si

P

S

Cr

Mo

Ni

N

316L Min

16.0

2.0

10.0

316L Max

0.03

2.0

0.75

0.045

0.030

18.0

3.0

14.0

0.10

Mechanical Properties of Stainless Steel 316L Flanges

The following table briefly explains the mechanical properties of Stainless Steel 316L flanges, such as tensile strength, yield strength, and elongation.

Property

Value

Tensile Strength

485 MPa min

Yield Strength (0.2% Offset)

170 MPa min

Elongation (% in 50 mm)

40% min

Hardness (Brinell)

217 HB max

Physical Properties of Stainless Steel 316L Flanges

The physical properties of Stainless Steel 316L Flanges are listed in the table below, along with density and thermal conductivity.

Grade

Density (kg/m³)

Elastic Modulus (GPa)

Mean Co-eff of Thermal Expansion (µm/m/°C) 0–100°C

Thermal Conductivity (W/m.K) at 100°C

Specific Heat (J/kg.K)

Elec Resistivity (nΩ.m)

316L

8000

193

15.9

16.3

500

740

Dimension Chart of Stainless Steel 316L Flanges

Consult the chart below for the standard dimensions of Class 150 flanges, ensuring precise alignment and fit for your piping system.

NPS

Outside Dia (O)

Thickness (Q)

Raised Face Dia (R)

Hub Base (X)

WN Length (Y)

SO/TH/SW Length (Y)

Bore (B)

1/2"

3.50

0.44

1.38

1.19

1.88

0.62

0.62

3/4"

3.88

0.50

1.69

1.50

2.06

0.62

0.82

1"

4.25

0.56

2.00

1.94

2.19

0.69

1.05

1-1/4"

4.62

0.62

2.50

2.31

2.25

0.81

1.38

1-1/2"

5.00

0.69

2.88

2.56

2.44

0.88

1.61

2"

6.00

0.75

3.62

3.06

2.50

1.00

2.07

2-1/2"

7.00

0.88

4.12

3.56

2.75

1.12

2.47

3"

7.50

0.94

5.00

4.25

2.75

1.19

3.07

4"

9.00

0.94

6.19

5.31

3.00

1.31

4.03

6"

11.00

1.00

8.50

7.56

3.50

1.56

6.07

8"

13.50

1.12

10.62

9.69

4.00

1.75

7.98

10"

16.00

1.19

12.75

12.00

4.00

1.94

10.02

12"

19.00

1.25

15.00

14.38

4.50

2.19

12.00

14"

21.00

1.38

16.25

15.75

5.00

2.25

13.25

16"

23.50

1.44

18.50

18.00

5.00

2.50

15.25

20"

27.50

1.69

23.00

22.00

5.69

2.88

19.25

24"

32.00

1.88

27.25

26.12

Dimensions per ASME B16.5 Class 150. Confirm dimensions for other pressure classes with your supplier.

Size Chart of Stainless Steel 316L Flanges

Refer to the table below to verify the specific size ranges and pressure ratings available across various international dimensional standards.

Dimension Standard

Size Range

Rating / Class

ASME / ANSI B16.5

1/2” to 24”

Class 150 to 2500 Lbs

ASME B16.47 / API 605

26” to 60”

Class 150 to 900 Lbs

MSS-SP-44

12” to 60”

Class 150 to 900 Lbs

ASME / ANSI B16.36

1” to 24”

Class 300 to 2500 Lbs

ASME B16.48 / API 590

1/2” to 24”

Class 150 to 2500 Lbs

API 6A

2 1/16” to 30”

2000 Psi to 20000 Psi

BS 3293

26” to 48”

Class 150 to 600 Lbs

DIN / EN 1092-1

DN10 to DN3600

PN6 to PN160

Pressure Rating Chart of Stainless Steel 316L Flanges

This SS 316L pressure chart helps engineers select safe flange ratings at varying temperatures.

Temperature (°F)

400#

2500#

900#

1500#

150#

300#

600#

500

620

3880

1395

2330

170

465

930

-20 to 100

960

6000

2160

3600

275

720

1440

650

575

3580

1290

2150

125

430

860

600

580

3640

1310

2185

140

435

875

800

540

3360

1210

2015

90

425

905

200

800

5000

1800

3000

230

600

1200

1250

150

945

340

565

20

115

225

1050

410

2570

925

1545

20

310

615

650

575

3580

1290

2150

125

430

860

300

720

4500

1620

2700

205

540

1080

400

660

4140

1490

2485

190

495

995

1100

345

2145

770

1285

20

255

515

1200

205

1285

465

770

20

155

310

1000

430

2675

965

1605

20

320

640

850

530

3300

1190

1980

65

395

790

900

520

3240

1165

1945

50

390

780

750

555

3460

1245

2075

95

415

830

1400

65

400

145

240

20

50

95

700

565

3540

1275

2125

110

425

850

1150

265

1655

595

995

20

200

400

1450

45

285

105

170

15

35

70

950

510

3180

1145

1910

35

380

765

1350

80

515

185

310

20

60

125

1300

115

715

255

430

20

85

170

1500

35

230

80

135

10

25

55

Pressure ratings per ASME B16.5 for Group 2.3 (316L). Actual ratings depend on temperature; always verify with the relevant table for your service condition.

Key Features of Stainless Steel 316L Flanges

Review the core performance advantages of this low-carbon material. Explore the primary features of Stainless Steel 316L Flanges below:

  • Low Carbon
  • Corrosion Resistance
  • Non-Magnetic
  • Cryogenic Toughness
  • Weld Compatibility
  • Facing Options
  • Industrial Durability
  • Standard Compliance

Applications of Stainless Steel 316L Flanges

Discover the specialised industrial sectors where these low-carbon components are essential. Below are the primary applications for Stainless Steel 316L Flanges:

  • Chemical Processing
  • Pharmaceutical Manufacturing
  • Food & Beverage
  • Offshore Energy
  • Desalination Plants
  • Marine & Shipbuilding
  • Petrochemical Systems
  • Pulp & Paper
  • Architectural Piping
  • Cryogenic Systems

How to Choose the Right Stainless Steel 316L Flanges Supplier?

Please refer to the following pointer before placing the order for Stainless Steel 316L Flanges, as it will help you to select the material as per your project requirements.

Supplier Selection Criteria

Verify the supplier provides mill test certificates with full heat and lot traceability. 316L is regularly misrepresented or supplied with carbon above the 0.03% L-grade limit. Check the carbon value on the MTC before accepting material. Request EN 10204 3.1 as a minimum; EN 10204 3.2 is required for pressure equipment and ASME-stamped systems.

Technical Considerations

Confirm the flange standard and pressure class before ordering. ASME B16.5 covers up to 24" NB, ASME B16.47 covers 26" and above. Verify the facing type (RF, FF, RTJ) matches your gasket and mating flange. For ASME-coded pressure systems, ensure material is certified to ASTM A182 F316L, not a generic "SS 316L bar"; the forging and testing requirements differ.

Quality & Certification Check

Prefer vendors with ISO 9001:2015 certification and capability to do third-party inspection via SGS, BV, TUV, or Lloyds. European PED-compliant projects confirm EN 1092-1 documentation available. Flanges shall be supplied in the solution annealed condition. Heat treatment records shall be included in all documentation packages.

Procurement Tips for Bulk Orders

Consolidate flange types, sizes, and pressure classes with one supplier to reduce documentation and enhance pricing. A vendor-qualified supplier decreases recurring overhead for quality verification for continuing procurement. For first-time procurement, always compare MTCs from two to three vendors to check material and benchmark pricing.

Stainless Steel 316L Flanges Suppliers

Stainless Steel 316L Flanges FAQ's  

SS 316L Flanges are priced between ₹300 and ₹890 per kg in the Indian market. Per-piece pricing ranges from ₹150 to ₹12,000 depending on size, pressure class, and flange type. Prices move with LME nickel and molybdenum market rates.

SS 316L Flanges are manufactured to ASTM A182 F316L for material, ASME B16.5 for flanges up to 24" NB, and ASME B16.47 for large-diameter flanges above 24" NB. European supply conforms to EN 1092-1 and Werkstoff Nr. 1.4404.

SS 316L Flanges are available from 1/2" NB to 60" NB. Standard ASME B16.5 sizes run from 1/2" to 24" NB across Class 150 through Class 2500. Larger sizes to 60" NB are available under ASME B16.47. Custom sizes are manufactured on request.

SS 316L Flanges are manufactured from UNS S31603 low-carbon austenitic stainless steel containing chromium (16–18%), molybdenum (2–3%), nickel (10–14%), and carbon (0.03% max). The low carbon content prevents sensitisation and intergranular corrosion in the welded condition.

SS 316L Flanges are used in chemical processing, pharmaceutical, food and beverage, oil and gas, desalination, marine, petrochemical, pulp and paper, cryogenic, and coastal construction industries, wherever corrosion resistance in chloride or acidic environments is required at flanged pipe joints.