How does the casting process work for SS forged flange?

Casting is a go-to technique for affordably manufacturing accurate and complex components. For stainless steel flanges, the process begins with melting the raw materials in an industrial furnace. The mould gets pre-heated.

A centrifuge machine permits manufacturers to pour the melted steel into the preset mould. Finally, the casting undergoes cooling before it is removed from the mould. On the downside, casting can bring in defects and internal structural errors. An SS forged flange is generally superior in mechanical and chemical properties.

We are a professional supplier of SS flange in Mumbai as per ASME B16.5

Stainless steel flanges manufacturer in India

What are the machinability characteristics of SS flanges?

The machinability of these flanges is not brilliant, but it can get boosted by using the appropriate tools and feed rate. It also depends on the grade of stainless steel. Elements like sulfur can impact the ease of machining of SS flanges.

For example, flanges produced from ferritic grades have higher machinability than martensitic ones.
This trait also differs by heat treatment. So, highly annealed materials are trickier to machine. But a stainless steel weld neck flange produced from a precipitation-hardened grade is easier to handle after solution-treating.

Looking for SS blind and slip on flanges stockist? you are at best place, buy stainless steel pipe flange online now and save cost

Stainless Steel Flanges

Stainless steel flanges

SS forged flange

SS forged flange

SS flanges

SS flanges

What are the common methods used to protect Stainless steel pipe flange from corrosion?

Excellent rust resistance to water, alkalis, and some acids is a hallmark of these flanges. But a stainless steel pipe flange might erode when exposed to aggressive saline or acidic media. A protective coating like epoxy and maintenance paints can minimise corrosion.

Thorough cleaning with non-abrasive tools and non-chloride cleaners is recommended. Some sectors use a waterproof polyurethane sealant for a stainless steel lap joint flange. Passivation (eliminating ferrous contaminants) and using polymer composites are also excellent methods to prevent damage triggered by corrosion.

Here you can buy stainless steel weld neck and threaded flange in sizes ranging from 1/2β€³ to 48β€³ or as per customer specification

Specifications of Stainless steel flanges

Stainless steel flanges specifications

Standards Equipment Sizes Face type
ASTM A182 / ASME SA182
  • Sand-blasting machine
  • Press machine
  • Pushing Machine
  • Β Bending machine
  • Electric bevelling machine
1/2 inch (15 NB) to 48 inch (1200NB)
  • flat (FF)
  • raised (RF)
  • ring joint (RTJ)
  • lap joint male and female (M&F)
  • tongue and groove (T&G)
What we offer ? Production technique Pressure Class Application
  • EN 10204/3.1B
    Raw Materials Certificate
  • 00% Radiography Test Report
  • Third Party Inspection Report etc
Forged Heat treated and machined 150, 300, 600, 900, 1500, 2500
  • Pipeline engineering
  • Marine industry
  • Power industry
  • Oil & gas industry
  • Waste water management
  • Aerospace
  • Plant engineering
  • Chemical industry
  • Food processing
Testing methods Dimensions Grades Types
  • Hardness test
  • Impact test
  • Tensile test
  • Fatigue mechanics test
ASME B16.9, MSS SP43, DIN EN F-310, 316N, 316Ti, 321, 316H, 321H, 904L 316, 304N, 304L, 316LN, 317, 304LN, 317L, 304, 347, 316L, 347H, 304H SO, SW, WN, BL, THRD, Lap Joint, Reducing Flanges, Orifice Type, Spectacle Blind
Get a wide selection of SS socket weld and forged flanges with RF, FF and many more face, now its time to quote without wasting time to get best price
SS flanges types

Stainless steel pipe flange

Stainless steel pipe flange

  • Sizes: 1/2 to 40 NPS
  • Production technique: Forged, Heat treated and machined

Stainless steel blind flange

Stainless steel blind flange

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

Stainless flange

Stainless flange

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

Stainless steel threaded flange

Stainless steel threaded flange

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

Stainless steel slip on flange

Stainless steel slip on flange

  • Standard: ANSI/ASME B16.5
  • Manufacturing: forged and cast type

Stainless steel weld neck flange

Stainless steel weld neck flange

  • Low maintenance
  • Resistant to corrosion and staining
  • Bright familiar luster
Our online store offering stainless flange including lap joint and reducing flange as per ANSI B16.47, call now for most updated price list
SS weld neck flange tolerance
Tolerance SS Weld Neck flanges
  • 12″ thru 18″: +1/8″
  • 10″ and smaller: Β±1/32″
  • 20″ and larger: -1/16″
D Inside Diameter (ID)
  • When OD is over 24″: Β±1/8″
  • When OD is 24″ or less: Β±1/16″
A OD
  • 20″ and larger: Β±3/16″, -0″
  • 18″ and smaller: Β±1/8″, -0″
C Thickness
  • When hub base is over 24″: Β±1/8″
  • When hub base is 24″ or smaller: Β±1/16″
J hub at base Diameter
  • 1/4″ T/G (Tongue & Groove), RF (Raised Face), (male & female), (m/f): Β±1/64″
  • 1/16″ raised face: Β±1/32″
B contact face Diameter
  • Bolts hole spacing: Β±1/32″
  • Circle Bolts: Β±1/16″
P Drilling
  • 3″ and larger Β±1/16″ max
  • 2 1/2″ and smaller Β±1/32″ max
with respect to facing eccentricity of bolt circle
  • 6″ and larger: +5/32″ , -1/32
  • 5″ and smaller: +3/32″ , -1/32″
H at point of welding diameter of hub
  • 12″ and larger: Β±1/8″
  • 10″ and smaller: Β±1/16″
K hub length
Pressure rating of SS forged flange

Metic Unit

flanges Class
Temperature. Β°C 600 300 150 400 900 1500 2500
βˆ’29~38 103.4 51.7 20.0 68.9 155.1 258.6 430.9
50 103.4 51.7 19.5 68.9 155.1 258.6 430.9
100 103.0 51.5 17.7 68.7 154.6 257.6 429.4
150 100.3 50.3 15.8 66.8 150.6 250.8 418.2
200 96.7 48.3 13.8 64.5 145.0 241.7 402.8
250 92.7 46.3 12.1 61.7 139.0 231.8 386.2
300 85.7 42.9 10.2 57.0 128.6 214.4 357.1
325 82.6 41.4 9.3 55.0 124.0 206.6 344.3
350 80.4 40.3 8.4 53.6 120.7 201.1 335.3
375 77.6 38.9 7.4 51.6 116.5 194.1 323.2
400 73.3 36.5 6.5 48.9 109.8 183.1 304.9
425 70.0 35.2 5.5 46.5 105.1 175.1 291.6

 

US Customary Unit

flanges Class
Temperature. Β°F 600 300 150 400 900 1500 2500
-20~100 1500 750 290 1000 2250 3750 6250
200 1500 750 260 1000 2250 3750 6250
300 1455 730 230 970 2185 3640 6070
400 1395 700 200 930 2095 3490 5820
500 1330 665 170 885 1995 3325 5540
600 1210 605 145 805 1815 3025 5040
650 1175 590 125 785 1765 2940 4905
700 1135 570 110 755 1705 2840 4730
750 1065 530 95 710 1595 2660 4430
800 1015 510 80 675 1525 2540 4230
Stock list of stainless steel pipe flange
Type Of Connection flanges Size Range flanges Class and Schedule Maximum Pressure
Slip On 1/2″ ASME B16.5 Class 300 720 psi
Socket Weld 1/2″ ASME B16.5 Class 150 275 psi
Slip On 1/2″ ASME B16.5 Class 300 720 psi
FNPT 3/4″ ASME B16.5 Class 150 150 psi
Slip On 4″ ASME B16.5 Class 300 720 psi
Welded 1/2″ ASME B16.5 Class 150 150 psi
Slip On 1″ ASME B16.5 Class 300 720 psi
FNPT 1/2″ ASME B16.5 Class 150 150 psi
FNPT 1-1/4″ ASME B16.5 Class 300 720 psi
Socket Weld 3/4″ ASME B16.5 Class 150 275 psi
Slip On 1″ ASME B16.5 Class 300 720 psi
Socket Weld 1-1/4″ ASME B16.5 Class 150 275 psi
Slip On 1-1/4″ ASME B16.5 Class 300 720 psi
FNPT 2″ ASME B16.5 Class 150 150 psi
Slip On 1-1/2″ ASME B16.5 Class 300 720 psi
Socket Weld 1-1/2″ ASME B16.5 Class 150 275 psi
Slip On 2″ ASME B16.5 Class 300 720 psi
Socket Weld 2″ ASME B16.5 Class 150 275 psi
Slip On 1-1/2″ ASME B16.5 Class 300 720 psi
Slip On 2″ ASME B16.5 Class 300 720 psi
Socket Weld 3″ ASME B16.5 Class 150 275 psi
Slip On 2-1/2″ ASME B16.5 Class 300 720 psi
Socket Weld 2-1/2″ ASME B16.5 Class 150 275 psi
Slip On 2-1/2″ ASME B16.5 Class 300 720 psi
Socket Weld 4″ ASME B16.5 Class 150 275 psi
Slip On 3″ ASME B16.5 Class 300 720 psi
FNPT 4″ ASME B16.5 Class 150 150 psi
Slip On 3″ ASME B16.5 Class 300 720 psi
Slip On 4″ ASME B16.5 Class 300 720 psi
Stainless flange sizes
Dimension Standards Ratings Size Range in inch
ASME/ANSI B16.5 150# to 2500# 1/2 to 24
ASME/ANSI/B16.36 300# TO 2500# 1 TO 24
BS 3293 150# TO 600# 26 TO 48
MSS SP 44 150# to 900# 12 TO 60
ASME/B16.47/API 605 26 TO 60
ASME B16.48 / API 590 150# TO 2500# 1/2 TO 24
API 6A API 6B 2000 PSI TO 20000 PSI 2 1/6 TO 30
DIN PN6 TO PN160 DN10 TO DN3600
Standards of SS slip on flange
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
Face type of stainless steel flanges
Type Face Type of Monel 400 flanges
E Spigot
D Grooved Face
B Raised Face
A Flat Face
C Tongue Face
G Ring Recess
F Recess
H O-Ring Groove
Torque chart of SS 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
Stainless steel blind flange chemical composition
Grade C Mn Si P S Cr Mo Ni N
304 0.08 max 2.0 max 0.75 max 0.045 0.030 18.0-20.0 – 8.0-10.5 0.10
304L 0.030 max 2.0 max 0.75 max 0.045 0.030 18.0-20.0 – 8.0-12.0 0.10
304H 0.04-0.10 2.0 max 0.75 max 0.045 0.030 18.0-20.0 – 8.0-10.5 –
310 0.015 max 2 max 0.15 max 0.020 max 0.015 max 24.00 – 26.00 0.10 19.00 – 21.00 54.7 min
310S 0.08 max 2 max 1.0 max 0.045 max 0.030 max 24.00 – 26.00 0.75 19.00 – 21.00 53.095 min
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
316L 0.035 max 2.0 max 1.0 max 0.045 max 0.030 max 16.00 – 18.00 2.00 – 3.00 10.00 – 14.00 68.89 min
316H 0.10 max 0.10 max 0.75 max 0.045 max 0.030 max 16.00 – 18.00 2.00 – 3.00 10.00 – 14.00
SS 317 0.08 max 2.0 max 1.0 max 0.045 max 0.030 max 18.00 – 20.00 3.00 – 4.00 11.00 – 15.00 57.845 min
SS 317L 0.035 max 2.0 max 1.0 max 0.045 max 0.030 max 18.00 – 20.00 3.00 – 4.00 11.00 – 15.00 57.89 min
SS 321 0.08 max 2.0 max 1.0 max 0.045 max 0.030 max 17.00 – 19.00 5(C+N) – 0.70 max 9.00 – 12.00
SS 321H 0.04 – 0.10 2.0 max 1.0 max 0.045 max 0.030 max 17.00 – 19.00 9.00 – 12.00 0.10 max
SS 347 0.08 max 2.0 max 1.0 max 0.045 max 0.030 max 17.00 – 20.00 9.00 – 13.00
SS 347H 0.04 – 0.10 2.0 max 1.0 max 0.045 max 0.030 max 17.00 – 19.00 9.0 -13.0
SS 409 0.08 max 1.00 max 1.00 max 0.045 max 0.030 max 10.5 – 11.75 0.5
SS 410S 0.080 max 1.00 max 1.00 max 0.040 max 0.030 max 10.5 – 12.5
SS 904L 0.020 max 2.00 max 1.00 max 0.040 max 0.030 max 19.00 – 23.00 4.00 – 5.00 max 23.00 – 28.00
SS threaded flange mechanical properties
Grade Melting Point Density Tensile Strength Elongation Yield Strength (0.2%Offset)
304/304H/304L (2550 Β°F)1400 Β°C 8.0 gram/cm3 MPa – 515, Psi – 75000 35 % MPa – 205, Psi – 30000
310/310S 1402 Β°C (2555 Β°F) 7.9 gram/cm3 MPa – 515, Psi – 75000 40 % MPa – 205, Psi – 30000
316/316L/316H 1400 Β°C (2550 Β°F) 8.0 gram/cm3 MPa – 515, Psi – 75000 35 % MPa – 205, Psi – 30000
317/ 317L 1400 Β°C (2550 Β°F) 7.9 gram/cm3 MPa – 515, Psi – 75000 35 % MPa – 205, Psi – 30000
321/ 321H 1457 Β°C (2650 Β°F) 8.0 gram/cm3 MPa – 515, Psi – 75000 40 % MPa – 205, Psi – 30000
347/ 347H 1454 Β°C (2650 Β°F) 8.0 gram/cm3 MPa – 515, Psi – 75000 35 % MPa – 205, Psi – 30000
410S 1532Β°C (2790Β°F) 7.80 gram/cm3 MPa – 515, Psi – 75000 25 % MPa – 205, Psi – 30000
904L 1350 Β°C (2460 Β°F) 7.95 gram/cm3 Psi – 71000 , MPa – 490 35 % Psi – 32000 , MPa – 220
Equivalent grades of Stainless steel slip on flange
STANDARD WERKSTOFF NR. UNS JIS BS GOST AFNOR EN
SS 304 1.4301 S30400 SUS 304 304S31 08Π₯18Н10 Z7CN18‐09 X5CrNi18-10
SS 304L 1.4306 / 1.4307 S30403 SUS 304L 3304S11 03Π₯18Н11 Z3CN18‐10 X2CrNi19-11/ X2CrNi18-9
SS 304H 1.4301 S30409 – – – – –
SS 310 1.4841 S31000 SUS 310 310S24 20Ch25N20S2 – X15CrNi25-20
SS 310S 1.4845 S31008 SUS 310S 310S16 20Ch23N18 – X8CrNi25-21
SS 316 1.4401 / 1.4436 S31600 SUS 316 316S31 / 316S33 – Z7CND17‐11‐02 X3CrNiMo17-13-3/ X5CrNiMo17-12-2
SS 316L 1.4404 / 1.4435 S31603 SUS 316L 316S11 / 316S13 03Ch17N14M2/ 03Ch17N14M3 Z3CND18‐14‐03/ Z3CND17‐11‐02 X2CrNiMo18-14-3 /X2CrNiMo17-12-2
SS 316H – S31609 – 316S51 – – –
SS 317 1.4449 S31700 SUS 317 – – – X5CrNiMo1713
SS 317L 1.4438 S31703 SUS 317L – – – X2CrNiMo18-15-4
SS 321 1.4541 S32100 SUS 321 – – – X6CrNiTi18-10
SS 321H 1.4878 S32109 SUS 321H – – – X12CrNiTi18-9
SS 347 1.4550 S34700 SUS 347 – – – X6CrNiNb18-10
SS 347H 1.4961 S34709 SUS 347H – – – X6CrNiNb18-12
SS 409 1.4512 S40900 SUS409 – – – X2CrTi12
SS 410S 1.4516 S41008 SUS410S – – – X6CrNiTi12
SS 904L 1.4539 N08904 SUS 904L 904S13 STS 317J5L Z2 NCDU 25-20 X1NiCrMoCu25-20-5
Dimensions of SS flanges

Stainless Steel Flange Dimensions

Normal Pipe Sizes in inch Wall THK (Outside Dia) Dia. of (Raised Face) RF Length Of Tdru Hub Dia. of Hub at Base Dia. And Bore Radius of (Fillet) Dia. of (Hub at Bevel) Socket Deptd
Weld Neck For (WN) Slip On For (SO)/ Threaded For (NPT) And Socket (SW) Lap Joint For (Loose) Slip On For (SO)/ Socket For (SW) Lap Joint For (Loose)
(Q) (O) (R) (Y) (Y) (Y) (X) (W) (B) (r) (H) (Z)
1/2 7/16 3-1/2 1-3/8 1-7/8 5/8 5/8 1-3/16 .88 .90 1/8 .84 3/8
3/4 1/2 3-7/8 1-11/16 2-1/16 5/8 5/8 1-1/2 1.09 1.11 1/8 1.05 7/16
1 9/16 4-1/4 2 2-3/16 11/16 11/16 1-15/16 1.36 1.38 1/8 1.32 1/2
1-1/4 5/8 4-5/8 2-1/2 2-1/4 13/16 13/16 2-5/16 1.70 1.72 3/16 1.66 9/16
1-1/2 11/16 5 2-7/8 2-7/16 7/8 7/8 2-9/16 1.95 1.97 1/4 1.90 5/8
2 3/4 6 3-5/8 2-1/2 1 1 3-1/16 2.44 2.46 5/16 2.38 11/16
2-1/2 7/8 7 4-1/8 2-3/4 1-1/8 1-1/8 3-9/16 2.94 2.97 5/16 2.88 3/4
3 15/16 7-1/2 5 2-3/4 1-3/16 1-3/16 4-1/4 3.57 3.60 3/8 3.50 13/16
3-1/2 15/16 8-1/2 5-1/2 2-13/16 1-1/4 1-1/4 4-13/16 4.07 4.10 3/8 4.00 7/8
4 15/16 9 6-3/16 3 1-5/16 1-5/16 5-5/16 4.57 4.60 7/16 4.50 15/16
5 15/16 10 7.5/16 3-1/2 1-7/16 1-7/16 6-7/16 5.66 5.69 7/16 5.56 15/16
6 1 11 8-1/2 3-1/2 1-9/16 1-9/16 7-9/16 6.72 6.75 1/2 6.63 1-1/16
8 1-1/8 13-1/2 10-5/8 4 1-3/4 1-3/4 9-11/16 8.72 8.75 1/2 8.63 1-1/4
10 1-3/16 16 12-3/4 4 1-15/16 1-15/16 12 10.88 10.92 1/2 10.75 1-5/16
12 1-1/4 19 15 4-1/2 2-3/16 2-3/16 14-3/8 12.88 12.92 1/2 12.75 1-9/16
14 1-3/8 21 16-1/4 5 2-1/4 3-1/8 15-3/4 14.14 14.18 1/2 14.00 1-5/8
16 1-7/16 23-1/2 18-1/2 5 2-1/2 3-7/16 18 16.16 16.19 1/2 16.00 1-3/4
18 1-9/16 25 21 5-1/2 2-11/16 3-13/16 19-7/8 18.18 18.20 1/2 18.00 1-15/16
20 1-11/16 27-1/2 23 5-11/16 2-7/8 4-1/16 22 20.20 20.25 1/2 20.00 2-1/8
24 1-7/8 32 27-1/4 6 3-1/4 4-3/8 26-1/8 24.25 24.25 1/2 24.00 2-1/2
Class 150 stainless steel Flanges Weight Chart
NPS Threaded Slip
On
Socket
Weld
Blind Lap
Joint
Weld
Neck
1/2 0.5 0.5 0.9 0.9 0.5 0.9
3/4 0.9 0.9 0.9 0.9 0.9 0.9
1 0.9 0.9 0.9 0.9 0.9 1.4
1ΒΌ 1.4 1.4 1.4 1.4 1.4 1.4
1Β½ 1.4 1.4 1.4 1.8 1.4 1.8
2 2.3 2.3 2.3 2.3 2.3 2.7
2Β½ 3.6 3.6 3.6 3.2 3.6 4.5
3 4.1 4.1 4.1 4.1 4.1 5.2
3Β½ 5.4 4 4 5.9 4 5.4
4 5.9 5.9 5.9 7.7 5.9 7.4
5 6.8 6.8 6.8 9 6.8 9.5
6 8.6 8.6 8.6 12.2 8.6 11.7
8 13.5 13.5 13.5 21.2 13.5 18.9
10 19.4 19.4 19.4 31.5 19.4 24.3
12 28.8 28.8 28.8 55.4 28.8 39.6
14 40.5 40.5 40.5 63 47.3 51.3
16 44.1 47.7 44.1 81 63 63
18 58.5 58.5 58.5 99 72 74.3
20 74.3 74.3 74.3 128.3 87.8 88.7
22 83.3 83.3 83.3 159.8 110.3 101.3
24 99 99 99 193.5 123.8 120.6
What is the typical size range available for Stainless steel blind flange?

These flanges have multiple roles, like sealing a piping section or facilitating pressure testing. Clients can order a stainless steel blind flange in sizes Β½ to 24 or 48 inches (NB).
These components are available in pressure classes up to 2500 and NPS from ½” to 24.

What are the different face types available for Stainless flange?

Clients may procure various face types for a stainless flange – it wholly depends on the application. But the raised face flange is usually favoured. A flat face flange keeps the gasket surface and the bolting circle in one plane.

Buyers may also use a tongue-and-groove stainless steel reducing flange, where the faces have a raised ring and a depression to match. The M&F flange face (male and female) comprises matching flanges. We suggest a ring-type joint flange if the application encounters higher pressures and temperatures.

What are the common tests performed on Stainless steel threaded flange during manufacturing?

High-quality manufacturing approaches integrate testing at every step, including sourcing and melting the raw material. A stainless steel threaded flange undergoes chemical analysis (spectrograph) during and after production to confirm the chemical composition.

Some mills conduct mechanical and dimensional testing to ensure adherence to client specifications.

Are Stainless steel flanges manufacturers provide guarantee or warranty in India?

These flanges last for over 50 years when used and maintained correctly. Some mills issue Guarantee-Warranty Certificates for a stainless steel slip on flange. However, these documents relate mainly to manufacturing defects and mechanical or chemical properties and extend to around 3 to 5 years. Application-specific use will help optimise the lifespan of the flanges.

You will also receive a mill test report to certify that the product adheres to the specifications for grain size, carbon content, etc.

Manufacturers cannot provide a guarantee or warranty against defects introduced during the application, such as corrosion or wear and tear. The buyer must ensure the fitness of the stainless steel plate flanges for the application.