API 6A Type WN BL Nickel Alloy Flanges Hastelloy B2 6B 6BX 3000PSI 5000PSI

API 6A TYPE 6B 6BX 3000PSI 5000PSI WN BL Nickel Alloy Flange Hastelloy B2

1. Hastelloy B2 API and ASME/ANSI flanges - comparing dimensions and pressure ratings

Although the dimensions of ASME and API flanges may sometimes be compatible for bolting - using the same bolt circle and the same number of bolts - they do not share the same pressure rating system.

• ASME rates the pressure of a class based on the material of construction and the design temperature
• API specifies allowable materials and gives it a specific pressure rating

The difference between ASME/ANSI and API is the fabrication material and a higher rated API operating pressure.

ASME/ANSI flanges are commonly used in industrial process systems handling water, steam, air and gas. API flanges are manufactured for high strength operating refinery systems with products such as oil and explosive gases.

The flange standards API 6A and ASME/ANSI B16.5 have the same dimensions - but the API 6A flanges are rated for higher pressures as indicated below:

¹⁾ In the old API standard, flanges ranged from 1 1/2 to 10(20) inches.

• 1 inch = 25.4 mm

2. Hastelloy B2 material introduction:

Hastelloy B2 Flanges Chemical Composition

Mechanical & Physical Properties

3. Hastelloy B2 Dimensions 6B Flanges API 6A 5000 PSI Working Pressure