Stainless Steel 317 Flanges

Stainless Steel 317 Flanges Manufacturer and Supplier in India

Stainless Steel 317 Flanges are high-alloy austenitic flanges with elevated molybdenum content (3–4%), providing superior resistance to pitting, crevice corrosion, and chemical attack compared to 304 and 316 grades. They are manufactured to ASTM A182 F317 and are used in critical piping systems across chemical processing, pulp and paper, and offshore oil & gas industries.The various types of stainless steel flanges 317 are available to suit different installation needs such as Weld Neck, Slip-On, Blind, Socket Weld and Threaded Flanges. The 317 flanges are more corrosion resistant and resistant to harsh environments than standard stainless steel flanges. Solitaire Overseas is one of the premier stainless steel 317 flanges manufacturers and suppliers in India, providing stainless steel flanges that are of superior quality and are produced to international standards and customer specifications.

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Specifications of Stainless Steel 317 Flanges

Specification ParameterTechnical Details & Reference Standards
Size RangeGeneral Range: 1/2" to 48"
Bore Diameter Formula Range: NPS ≤ 10
Thickness Chart Range: NPS ≤ 18
Manufacturing StandardsANSI/ASME B16.5, ASME B16.47 Series A & B, ASME B16.36, ASME B16.48, EN1092, EN-1092, DIN, BS1560-3.1, BS4504, ISO, ISO70051, UNI, MSS S44, API, API605, API7S-15, API7S-43, AWWA C207, IS 2062
Pressure Ratings / TestingASME/ANSI: Class 150 to Class 2500
Japanese Standards (JIS): 5K, 10K, 16K, 20K, 30K, 40K, 63K
Temperature RatingsHigh Temperature: Above 200°C (400°F) for Class 150 OR Above 400°C (750°F)
Low Temperature: Above -29°C (−20°F)
Available Flange TypesLap Joint, Socket-Weld, Threaded, Weld Neck, Blind, Slip-On, Forged, Plate
Flange Face TypesFlat Face (FF), Raised Face, Large Male-Female, Small Male-Female, Lap-Joint Face, RTJ (Ring Type Joint), Large Tongue & Groove, Small Tongue & Groove
Production TechniquesForged, Machined, Heat Treated
Alternative Materials AvailableStainless Steel (317L base), Carbon Steel, Mild Steel, Alloy Steel, Duplex Steel & Super Duplex Steel, Inconel, Hastelloy, Copper Nickel, Cast Iron, Wrought Iron

Chemical Composition of Stainless Steel 317 Flanges

GradeCMnSiPSCrMoNiNFe
Stainless Steel 317 Flanges0.08 max2.0 max1.0 max0.045 max0.030 max18 – 203.00 - 4.0011.00 - 15.0057.845 minBalance (Bal.)

Mechanical Strength of ASTM A182 Grade F317 Flange

DensityMelting PointTensile StrengthYield Strength (0.2% Offset)Elongation
8.0 g/cm³1400°C (2550°F)75,000 psi (515 MPa)30,000 psi (205 MPa)35%

ASTM A182 F317L Equivalent Grades

StandardWerkstoff Nr.UNSJISEN
Stainless Steel 317 Flanges1.4449S31700SUS 317-

Weight Chart of Stainless Steel 317 Flanges

NPS (Nominal Pipe Size)SORF (Slip On)NPT (Threaded)SWRF (Socket Weld)Loose (Lap Joint)BLRF (Blind)WRNR (Weld Neck)
½112122
¾222222
1222223
1¼333333
1½333344
2555556
2½8888710
39999911.5
3½111211111312
4131313131716.5
5151515152021
6191919192726
8303030304742
10434343437054
126464646412388
14909090105140114
161069898140180140
18130130130160220165
20165165165195285197
22185185185245355225
24220220220275430268

Dimension Chart of Stainless Steel 317 Flanges

Normal Pipe Size (NPS) Outside Diameter (O.D.) Of Flange Thickness Of Flanges Diameter of Raised Face Hub at Base Diameter Length True Hub Hub at Bevel Diameter Bore And Diameter Radius of Fillet Socket Deptd
Weld Neck (WN) SORF (Slip-On) NPT (Threaded) SWRF (Socket) Loose (Lap Joint) SORF (Slip-on) SWRF (Socket) Loose (Lap Joint)
OQRXYYYWBHrZ
1/23-1/27/161-3/81-3/161-7/85/85/8.88.90.841/83/8
3/43-7/81/21-11/161-1/22-1/165/85/81.091.111.051/87/16
14-1/49/1621-15/162-3/1611/1611/161.361.381.321/81/2
1-1/44-5/85/82-1/22-5/162-1/413/1613/161.701.721.663/169/16
1-1/2511/162-7/82-9/162-7/167/87/81.951.971.901/45/8
263/43-5/83-1/162-1/2112.442.462.385/1611/16
2-1/277/84-1/83-9/162-3/41-1/81-1/82.942.972.885/163/4
37-1/215/1654-1/42-3/41-3/161-3/163.573.603.503/813/16
3-1/28-1/215/165-1/24-13/162-13/161-1/41-1/44.074.104.003/87/8
4915/166-3/165-5/1631-5/161-5/164.574.604.507/1615/16
51015/167.5/166-7/163-1/21-7/161-7/165.665.695.567/1615/16
61118-1/27-9/163-1/21-9/161-9/166.726.756.631/21-1/16
813-1/21-1/810-5/89-11/1641-3/41-3/48.728.758.631/21-1/4
10161-3/1612-3/41241-15/161-15/1610.8810.9210.751/21-5/16
12191-1/41514-3/84-1/22-3/162-3/1612.8812.9212.751/21-9/16
14211-3/816-1/415-3/452-1/43-1/814.1414.1814.001/21-5/8
1623-1/21-7/1618-1/21852-1/23-7/1616.1616.1916.001/21-3/4
18251-9/162119-7/85-1/22-11/163-13/1618.1818.2018.001/21-15/16
2027-1/21-11/1623225-11/162-7/84-1/1620.2020.2520.001/22-1/8
24321-7/827-1/426-1/863-1/44-3/824.2524.2524.001/22-1/2

Stainless Steel 317 Flanges Tolerance Chart

Wall Thickness Of Stainless Steel 317L Flanges

Normal Pipe Size (NPS)O.D. (Outside Diameter)Sch 10Sch 20Sch 30STD Wall Outside DiameterSch 40Sch 60EXT Hvy Outside DiameterSchedule 80Schedule 100Schedule 120Schedule 140Schedule 160XX Hvy
½0.840.083......0.1090.109...0.1470.147.........0.1880.294
¾1.050.083......0.1130.113...0.1540.154.........0.2190.308
11.3150.109......0.1330.133...0.1790.179.........0.250.358
1 ¼1.660.109......0.140.14...0.1910.191.........0.250.382
1 ½1.90.109......0.1450.145...0.20.2.........0.2810.4
22.3750.109......0.1540.154...0.2180.218.........0.3440.436
2 ½2.8750.12......0.2030.203...0.2760.276.........0.3750.552
33.50.12......0.2160.216...0.30.3.........0.4380.6
3 ½40.12......0.2260.226...0.3180.318............0.636
44.50.12......0.2370.237...0.3370.337...0.438...0.5310.674
55.5630.134......0.2580.258...0.3750.375...0.5...0.6250.75
66.6250.134......0.280.28...0.4320.432...0.562...0.7190.864
88.6250.1480.250.2770.3220.3220.4060.50.50.5940.7190.8120.9060.875
1010.750.1650.250.3070.3650.3650.50.50.5940.7190.84411.1251
1212.750.180.250.330.3750.4060.5620.50.6880.84411.1251.3121
14140.250.3120.3750.3750.4380.5940.50.750.9381.0941.251.406...
16160.250.3120.3750.3750.50.6560.50.8441.0311.2191.4381.594...
18180.250.3120.4380.3750.5620.750.50.9381.1561.3751.5621.781...
20200.250.3750.50.3750.5940.8120.51.0311.2811.51.751.969...
22220.25......0.375......0.5......................
24240.250.3750.5620.3750.6880.9690.51.2191.5311.8122.0622.344....
2626............0.375........0.5........................
30300.3120.50.6250.375........0.5........................
36360.3120.50.6250.3750.75....0.5........................
4040............0.375........0.5........................
4242……..……..……..0.375……..……..0.5……..……..……..……..……..……..
4848……..……..……..0.375……..……..0.5……..……..……..……..……..……..

Applications Uses of Stainless Steel 317 Flanges

  • Chemical Processing Plants
  • Petrochemical Industries
  • Pulp and Paper Processing Plants
  • Fertilizer Manufacturing Units
  • Pharmaceutical Manufacturing Facilities
  • Offshore Oil & Gas Platforms
  • Desalination and Water Treatment Plants
  • Heat Exchanger and Pressure Vessel Systems

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Frequently Asked Questions

Stainless Steel 317 Flanges are high-alloy stainless steel pipe flanges known for their excellent corrosion resistance, especially in aggressive chemical environments.

The main difference is carbon content. SS 317L has lower carbon, which improves weldability and reduces the risk of carbide precipitation after welding.

SS 317 Flanges offer excellent resistance to pitting, crevice corrosion, chemicals, and high-temperature oxidation, making them suitable for demanding industrial applications.

Yes, Stainless Steel 317 Flanges provide superior corrosion resistance, particularly against chlorides, acids, and other harsh chemical media.

Yes, Stainless Steel 317 Flanges can be welded using standard stainless steel welding methods while maintaining good corrosion resistance and mechanical strength.

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