How does the strength of stainless steel 317L flanges contribute to their advantages?

These flanges exhibit multiple desirable properties, led by strength and corrosion resistance. Stainless steel 317L flangesuse an austenitic grade with the addition of molybdenum and a low percentage of carbon. This composition grants them protection against creep and stress-to-rupture.

ASTM A182 Grade F317L weld neck flanges boast high tensile strength (~590 Mpa) for versatile and challenging uses, e.g., flue gas desulphurization and chemical processing.

Most prominent SS 317l flanges manufacturer in India

Stainless steel 317L flanges manufacturer in India

What welding techniques are used for Inconel SS 317L flanges?

The usual methods for an SS 317L flanges are fusion and resistance welding. It doesn’t suffer from intergranular corrosion, and post-welding treatments are unnecessary. Oxyacetylene welding does not get used for an A182 F317L lap joint flanges. Note that this material does not respond to heat treatment but only cold working.

We have extensive experience as supplier of ASTM A182 F317L blind and slip on flanges in Mumbai at low price

Stainless steel 317L flanges

Stainless steel 317L flanges

SS 317L flange

SS 317L flanges

Stainless Steel 317L Blind Flange

Stainless Steel 317L Blind flanges

What are the advantages of using galvanized coatings on Stainless steel 317L blind flanges?

Blind flanges can seal a piping section or facilitate testing and repair. Galvanisation is an excellent solution to prevent a stainless steel 317L blind flanges from corrosion and natural elements. It uses a protective zinc coating, preferably through a hot dip (submersion in molten zinc).

Galvanisation also protects these components from physical damage through a metallurgical bond between the metal and the zinc. Overall, buyers experience longer service duration and a low probability of crevices. We recommend using a sufficiently thick coat to ensure adequate binding duringgalvanisation.

As stockist we keep one of the broadest selections of UNS S31703 weld neck and socket weld flanges in Class 150# to 2500#

Table of Content

Specifications of Stainless steel 317L flanges

Stainless steel 317L flanges specifications

Size Pressure Standard
1/2 to 60 inch NB PN6 to PN64 ASME/ANSI B16.5 and B16.47 Series A & B
Specification SS 317L flanges Class Face type
ASTM A182/ ASME SA182 300, 2500, 150, 900, 600, 1500 RF, FF, RTJ
Only top-notch quality ASTM A182 grade F317L threaded and lap joint flanges supply by us in different faces including RTJ, FF, RF etc.
Types of SS 317L flanges

ASTM A182 F317L plate flanges

ASTM A182 F317L plate flanges

  • Sizes: 1/2 to 60 inch NB
  • ASME standard: ANSI/ASME B16.5

UNS S31703 slip on flanges

UNS S31703 slip on flanges

  • Types : Blind, Weld neck, Slip On, Reducing flanges
  • Pressure: PN6 to PN64

SS 317l threaded flanges

SS 317l threaded flanges

  • Class: 150# to 2500#
  • ASTM standard: ASTM A182/ ASME SA182

ASTM A182 Grade F317L weld neck flanges

ASTM A182 Grade F317L weld neck flanges

  • Forged
  • Heat treated and machined

SS 317L socket weld flanges

SS 317L socket weld flanges

  • Ring Type Joint (RTJ)
  • Raised Face (RF) and Flat Face (FF)

DIN 1.4438 lap joint flanges

DIN 1.4438 lap joint flanges

  • Standard: ANSI B16.5, ANSI B16.47
  • B16.48, BS4504, BS 10, EN-1092
Standards of stainless steel 317l blind flanges
American National Standards Institute
  • ANSI 600
  • ANSI 150
  • ANSI 125
  • ANSI 300
  • ANSI 1500
  • ANSI 900
Australian Standard

AS2129
  • Table G
  • Table D
  • Table E
  • Table F
  • Table J
  • Table H
  • Table C
British Standard

BS10
  • Table H
  • Table K
  • Table F
  • Table D
  • Table G
  • Table E
  • Table J
British Standard

BS4504
  • BS4504-25
  • BS4504-10
  • BS4504-6
  • BS4504-100
  • BS4504-16
  • BS4504-64
  • BS4504-40
  • PN25
  • PN64
  • PN16
  • PN40
  • PN6
  • PN100
  • PN10
Torque chart UNS S31703 slip on flanges
Size in mm Size in Inches Imperfections Maximum. Radial Projection
Deeper Than the Bottom of the Serrations, mm No Deeper Than the Bottom of the Serrations, mm
20 3/4 1.5 3.0
15 1/2 1.5 3.0
25 1 1.5 3.0
40 1 1/2 1.5 3.0
32 1 1/4 1.5 3.0
50 2 1.5 3.0
80 3 1.5 4.5
65 2 1/2 1.5 3.0
90 3 1/2 3.0 6.0
125 5 3.0 6.0
100 4 3.0 6.0
150 6 3.0 6.0
250 10 4.5 8.0
200 8 4.5 8.0
300 12 4.5 8.0
500 20 6.0 12.0
400 16 4.5 10.0
350 14 4.5 8.0
450 18 6.0 12.0
600 24 6.0 12.0
Our stocklist of SS 317L flanges
flanges Class and Schedule flanges Size Range Type Of Connection Maximum Pressure
ASME B16.5 Class 300 1/2″ Slip On 720 psi
ASME B16.5 Class 150 1/2″ Socket Weld 275 psi
ASME B16.5 Class 300 1/2″ Slip On 720 psi
ASME B16.5 Class 150 3/4″ FNPT 150 psi
ASME B16.5 Class 300 4″ Slip On 720 psi
ASME B16.5 Class 150 1/2″ Welded 150 psi
ASME B16.5 Class 300 1″ Slip On 720 psi
ASME B16.5 Class 150 1/2″ FNPT 150 psi
ASME B16.5 Class 300 1-1/4″ FNPT 720 psi
ASME B16.5 Class 150 3/4″ Socket Weld 275 psi
ASME B16.5 Class 300 1″ Slip On 720 psi
ASME B16.5 Class 150 1-1/4″ Socket Weld 275 psi
ASME B16.5 Class 300 1-1/4″ Slip On 720 psi
ASME B16.5 Class 150 2″ FNPT 150 psi
ASME B16.5 Class 300 1-1/2″ Slip On 720 psi
ASME B16.5 Class 150 1-1/2″ Socket Weld 275 psi
ASME B16.5 Class 300 2″ Slip On 720 psi
ASME B16.5 Class 150 2″ Socket Weld 275 psi
ASME B16.5 Class 300 1-1/2″ Slip On 720 psi
ASME B16.5 Class 300 2″ Slip On 720 psi
ASME B16.5 Class 150 3″ Socket Weld 275 psi
ASME B16.5 Class 300 2-1/2″ Slip On 720 psi
ASME B16.5 Class 150 2-1/2″ Socket Weld 275 psi
ASME B16.5 Class 300 2-1/2″ Slip On 720 psi
ASME B16.5 Class 150 4″ Socket Weld 275 psi
ASME B16.5 Class 300 3″ Slip On 720 psi
ASME B16.5 Class 150 4″ FNPT 150 psi
ASME B16.5 Class 300 3″ Slip On 720 psi
ASME B16.5 Class 300 4″ Slip On 720 psi
Pressure ratings of ASTM A182 F317L lap joint flanges
Customary Unit
Temperature. °F 300 150 600 400 1500 900 2500
-20~100 750 290 1500 1000 3750 2250 6250
200 750 260 1500 1000 3750 2250 6250
300 730 230 1455 970 3640 2185 6070
400 700 200 1395 930 3490 2095 5820
500 665 170 1330 885 3325 1995 5540
600 605 145 1210 805 3025 1815 5040
650 590 125 1175 785 2940 1765 4905
700 570 110 1135 755 2840 1705 4730
750 530 95 1065 710 2660 1595 4430
800 510 80 1015 675 2540 1525 4230
metric unit
Temperature. °C 300 150 400 600 1500 900 2500
−29~38 51.7 20.0 68.9 103.4 258.6 155.1 430.9
50 51.7 19.5 68.9 103.4 258.6 155.1 430.9
100 51.5 17.7 68.7 103.0 257.6 154.6 429.4
150 50.3 15.8 66.8 100.3 250.8 150.6 418.2
200 48.3 13.8 64.5 96.7 241.7 145.0 402.8
250 46.3 12.1 61.7 92.7 231.8 139.0 386.2
300 42.9 10.2 57.0 85.7 214.4 128.6 357.1
325 41.4 9.3 55.0 82.6 206.6 124.0 344.3
350 40.3 8.4 53.6 80.4 201.1 120.7 335.3
375 38.9 7.4 51.6 77.6 194.1 116.5 323.2
400 36.5 6.5 48.9 73.3 183.1 109.8 304.9
425 35.2 5.5 46.5 70.0 175.1 105.1 291.6
A182 Gr F317L threaded flanges physical properties
Density Electrical Resistivity Specific Heat (0-100°C) Thermal Expansion Thermal Conductivity Modulus Elasticity
7.99 7.4 500 16.5 14.6 193
g/cm3 μohm/cm J.kg-1.°K-1 mm/m/°C W.m -1.°K-1 GPa
Weight chart of WNR 1.4438flanges
Standards Dia Class Bolt Circle Dia Bolt Sizes No of Bolts Dia of Bolt Hole
AS4087 95 PN14 67 M12 4 14
ANSI B16.5 89 ANSI 150 60 13 4 16
95 ANSI 300 67 13 4 16
95 ANSI 600 67 13 4 16
121 ANSI 900 83 19 4 22
121 ANSI 1500 83 19 4 22
AS 2129 95 Table C 67 13 4 14
95 Table D 67 13 4 14
95 Table E 67 13 4 14
95 Table F 67 13 4 14
114 Table H 83 16 4 17
114 Table J 83 16 4 17
ISO 7005 (DIN) 80 PN6 55 M10 4 11
95 PN10 65 M12 4 14
95 PN16 65 M12 4 14
90 PN20 60.5 M14 4 16
95 PN25 65 M12 4 14
95 PN40 65 M12 4 14
Dimensions of ASTM A182 grade F317L flanges
NPS For (Normal Pipe Sizes) in Inch Wall Thk Of (B) Outside Dia Of (O.D.)
(A)		 Dia Of Raised Face
(C)		 # flanges Bolts
Holes		 (D)
(B.C.D.)		 Approx.
Weight In (Kilogram)		 Dia Of Bolt Holes
1/2 7/16 3-1/2 1-3/8 4 2-3/8 2 5/8
3/4 1/2 3-7/8 1-11/16 4 2-3/4 2 5/8
1 9/16 4-1/4 2 4 3-1/8 2 5/8
1-1/4 5/8 4-5/8 2-1/2 4 3-1/2 3 5/8
1-1/2 11/16 5 2-7/8 4 3-7/8 3 5/8
2 3/4 6 3-5/8 4 4-3/4 4 3/4
2-1/2 7/8 7 4-1/8 4 5-1/2 7 3/4
3 15/16 7-1/2 5 4 6 9 3/4
3-1/2 15/16 8-1/2 5-1/2 8 7 13 3/4
4 15/16 9 6-3/16 8 7-1/2 17 3/4
5 15/16 10 7-5/16 8 8-1/2 20 7/8
6 1 11 8-1/2 8 9-1/2 27 7/8
8 1-1/8 13-1/2 10-5/8 8 11-3/4 47 7/8
10 1-3/16 16 12-3/4 12 14-1/4 67 1
12 1-1/4 19 15 12 17 123 1
14 1-3/8 21 16-1/4 12 18-3/4 139 1-1/8
16 1-7/16 23-1/2 18-1/2 16 21-1/4 187 1-1/8
18 1-9/16 25 21 16 22-3/4 217 1-1/4
20 1-11/16 27-1/2 23 20 25 283 1-1/4
24 1-7/8 32 27-1/4 20 29-1/2 415 1-3/8
Thickness tolerance of DIN 1.4438 weld neck flanges
SS 317L Weld Neck flanges Tolerance
D Inside Diameter (ID)
  • 12″ thru 18″: +1/8″
  • 10″ and smaller: ±1/32″
  • 20″ and larger: -1/16″
A OD
  • When OD is over 24″: ±1/8″
  • When OD is 24″ or less: ±1/16″
C Thickness
  • 20″ and larger: ±3/16″, -0″
  • 18″ and smaller: ±1/8″, -0″
J hub at base Diameter
  • When hub base is over 24″: ±1/8″
  • When hub base is 24″ or smaller: ±1/16″
B contact face Diameter
  • 1/4″ T/G (Tongue & Groove), RF (Raised Face), (male & female), (m/f): ±1/64″
  • 1/16″ raised face: ±1/32″
P Drilling
  • Bolts hole spacing: ±1/32″
  • Circle Bolts: ±1/16″
with respect to facing eccentricity of bolt circle
  • 3″ and larger ±1/16″ max
  • 2 1/2″ and smaller ±1/32″ max
H at point of welding diameter of hub
  • 6″ and larger: +5/32″ , -1/32
  • 5″ and smaller: +3/32″ , -1/32″
K hub length
  • 12″ and larger: ±1/8″
  • 10″ and smaller: ±1/16″
We are providing the most affordable ASTM A182 F 317L screwed and spectacle blind flanges with Mill TC with on time delivery as per ASME B16.5
Chemical composition of Stainless Steel 317L Blind flanges
Grade Mn C Si Cr P S Ni Mo N
317 minimum – – – 18.0 – – 11.0 – –
maximum 2.0 0.8 1.00 20.0 0.040 0.03 14.0 –
317L minimum – – – 18.0 – – 11.0 3.00 –
maximum 2.0 0.03 0.75 20.0 0.040 0.03 15.0 4.00 –
Mechanical properties of ASTM A182 F317L plate flanges
Grade Tensile Strength (MPa) minimum Yield Strength 0.2% Proof (MPa) minimum Elongation (% in 50 milimeter) minimum Hardness
Rockwell B (HR B) maximum Brinell (HB) maximum
317 515 205 35 95 217
317L 515 205 35 95 217
Equivalent of UNS S31703 slip on flanges
Grade Swedish SS UNS No Old British Euronorm Japanese JIS
BS En No Name
317 – S31700 – – 1.4449 – –
317L – S31703 – – 1.4438 – –
Are ASTM A182 F317L plate flanges available in standard inch sizes or metric sizes?

Manufacturers issue sizing charts for flanges per the ASTM A182specifications. The standard sizes are 1/2″ to 100″, available across schedules like SCH160S, XS, XXS, etc. Clients can order the desired ASTM A182 F317L plate flanges in sizes 1/2″ to 64″ (NB). These components, produced from steel plates, frequently operate in high-pressure conditions. Measuring and using the correct sized flanges is, therefore, critical.

Inch sizes are standard for a SS 317L socket weld flanges(where the pipe fits into a socket and gets secured by a fillet weld). But many mills share metric and inch figures. The former get listed as the nominal diameter, or DN, measured in mm.

How do the face types of UNS S31703 slip on flanges differ from each other?

Lower costs and easier installation make these flanges popular choices in many projects. UNS S31703 slip on flanges connect to the pipe by fillet welds and can use different face types. An A182 Gr F317L SORF flanges (raised face) is a common choice, with the sealing face jutting out from the plane of the bolting circle.

Contrastingly, a flat face flanges has the surface of the gasket and the bolting circle in one plane (uniplanar). These gaskets offer a larger sealing area and are best for low-pressure conditions. Ring-type joint flanges, another widespread choice, are preferable to manage high temperatures and pressure.

Other alternatives are a tongue-and-groove flanges, the faces comprising a raised ring and a matching depression. Some applications prefer an M&F flanges face – male, female. An SS 317L WNRF flanges (a weld-neck raised face) remains oft-used, despite the available options, for sheer strength and excellent versatility.

Why is testing important for ASTM A182 F317L threaded flanges?

Threaded flanges rely on a screw thread to connect to the piping. ASTM A182 F317L threaded flanges need further testing to judge strength, quality, and suitability for the application.

Non-destructive testing is typical for these components. Most manufacturers use radiography to detect corrosion and issues in thread alignment.Magnetic particle detection and ultrasonic examination can diagnose cracks and deformities.

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