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ASME Maximum Allowable Hydrostatic Test Pressures

Material
Group

Shell Test Pressures (All Pressures Are Gage)

CLASS
75

CLASS
150

CLASS
300

CLASS
400

CLASS
600

CLASS
900

CLASS
1500

CLASS
2500

1.1

225

450

1125

1500

2225

3350

5575

9275

1.2

225

450

1125

1500

2250

3375

5625

9375

1.4

175

375

950

1250

1875

2775

4650

7725

1.5

200

400

1050

1400

2100

3150

5225

8700

1.7

225

450

1125

1500

2250

3375

5625

9375

1.9

225

450

1125

1500

2250

3375

5625

9375

1.10

225

450

1125

1500

2250

3375

5625

9375

1.13

225

450

1125

1500

2250

3375

5625

9375

1.14

225

450

1125

1500

2250

3375

5625

9375

1.15

450

1125

1500

2250

3375

5625

9375

2.1

225

425

1100

1450

2175

3250

5400

9000

2.2

225

425

1100

1450

2175

3250

5400

9000

2.3

175

350

900

1200

1800

2700

4500

7500

2.4

225

425

1100

1450

2175

3250

5400

9000

2.5

225

425

1100

1450

2175

3250

5400

9000

2.6

200

400

1025

1350

2025

3025

5050

8400

2.7

200

400

1025

1350

2025

3025

5050

8400

NOTE:
Technical data contained in this section governed by ASME or other Codes/Specifications are subject to change and are therefore provided for information purposes only and are not to be used for design purposes. Refer to latest edition of applicable Code/Specification and addendums thereto for required design data.

Contact Us to Get Started with Manufacturing High Pressure Flanges

Contact our team for more information on the standards and specifications within the industry of manufacturing high pressure vessel connections. You can contact our team at (281) 441-4088 for answers to your questions and to get started with your next forging project.