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Stainless Steel 317 Flanges

Stainless Steel Flanges

Stainless Steel Flanges Specifications

Material Grades

  • Stainless Steel 304 / 304L / 304H
  • Stainless Steel 310 / 310S
  • Stainless Steel 316 / 316L / 316H
  • Stainless Steel 317 / 317L
  • Stainless Steel 321 / 321H
  • Stainless Steel 347 / 347H
  • Stainless Steel 446
  • Stainless Steel 904L

Forging Method

  • Closed Die Forging
  • Hot Forging
  • Impression Die Forging
  • Cold Forging
  • Open Die Forging
  • Drop Forging
  • Upset Forging

Flange Testing

  • Radiography Testing
  • Ultrasonic Testing
  • Liquid Penetrant Testing
  • Non-Destructive Testing (NDT)
  • Positive Material Identification (PMI)
  • Dimensional Inspection

Value Added Services

  • Heat Treatment
  • Solution Annealing
  • Pickling & Passivation
  • Shot Blasting
  • Machining
  • Custom Finishing

Manufacturing Standards

  • ASME B16.5
  • ASME B16.47 Series A & B
  • MSS SP-44
  • API 605
  • AWWA Standards
  • ASA Standards
  • Custom Drawings

Flanges Sizes

  • Size: 1/2" – 60"
  • Pressure Class: 150 – 2500 LBS
  • Pressure Rating: PN6 – PN64
  • Faces: FF, RF & RTJ

Flange Dimensions Chart

NPS Bolt Circle (mm) Flange O.D. (mm) Thickness (mm) Bolt Hole Ø (mm) No. Of Bolts
½″ 60.50 89.00 11.20 15.80 4
¾″ 69.90 98.50 12.70 15.80 4
1″ 79.30 108.00 14.20 15.80 4
1¼″ 88.90 117.50 15.70 15.80 4
1½″ 98.60 127.00 17.50 15.80 4
2″ 120.70 152.50 19.10 19.10 4
2½″ 139.70 178.00 22.40 19.10 4
3″ 152.40 190.50 23.90 19.10 4
3½″ 177.80 216.00 23.90 19.10 8
4″ 190.50 228.50 23.90 19.10 8
5″ 215.90 254.00 23.90 22.40 8
6″ 241.30 279.50 25.40 22.40 8
8″ 298.50 343.00 28.40 22.40 8
10″ 362.00 406.50 30.20 25.40 12
12″ 431.80 482.50 31.80 25.40 12
14″ 476.30 533.50 35.10 28.50 12
16″ 539.80 597.00 36.60 28.50 16
18″ 577.90 635.00 39.60 31.80 16
20″ 635.00 698.50 42.90 31.80 20
24″ 749.30 813.00 47.80 35.10 20

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Weight Chart

NPS Flange Type Weight / Pc (kg)
½″ Threaded Flange 0.4
¾″ Threaded Flange 0.7
1″ Threaded Flange 0.8
1¼″ Threaded Flange 1.2
1½″ Threaded Flange 1.5
2″ Threaded Flange 2.3
2½″ Threaded Flange 3.7
3″ Threaded Flange 4.1
3½″ Threaded Flange 5.1
4″ Threaded Flange 5.9
5″ Threaded Flange 7.0
6″ Threaded Flange 8.4
8″ Threaded Flange 13.0
10″ Threaded Flange 18.0
12″ Threaded Flange 29.0
14″ Threaded Flange 39.0
16″ Threaded Flange 47.0
18″ Threaded Flange 57.0
20″ Threaded Flange 76.0
24″ Threaded Flange 97.0

Chemical Composition

Carbon (C)
0.08% max
Manganese (Mn)
2.00% max
Silicon (Si)
1.00% max
Phosphorus (P)
0.045% max
Sulfur (S)
0.030% max
Chromium (Cr)
18.00–20.00%
Molybdenum (Mo)
3.00–4.00%
Nickel (Ni)
11.00–15.00%
Iron (Fe)
57.845% min

Physical Properties

Material Grade: Stainless Steel 317
UNS: S31700
Werkstoff No.: 1.4449
JIS: SUS 317
Density: 7.9 g/cm³
Melting Point: 1400 °C (2550 °F)
Material Standard: ASTM A182 / ASME SA182
Size Range: ½″ to 48″
Pressure Class: 150#, 300#, 600#, 900#, 1500#, 2500#

Mechanical Performance

515
MPa (75,000 psi)
Tensile Strength
205
MPa (30,000 psi)
Yield Strength
35
%
Elongation
7.9
g/cm³
Density
1400
°C
Melting Point
1.4449
Werkstoff No.
Material Grade


MANUFACTURING

Forging Process

Each flange follows a rigorous 8-step forging and quality-control process to ensure conformance with ASTM A182 and ASME standards.

1

Material Selection

Prime 304 stainless steel billet sourced and certified.

2

Billet Preparation

Heat to 1100°C – 1250°C for optimal forgeability.

3

Forging

Shape billet into flange geometry under controlled pressure.

4

Heat Treatment

Solution anneal at 1040°C – 1120°C, then quench.

5

Machining & Finishing

CNC machining, drilling, and surface finishing.

6

Testing & Inspection

Tensile, hardness, PMI, visual and impact tests performed.