Zhengzhou Huitong Pipeline Equipment Co.,Ltd.
Zhengzhou Huitong Pipeline Equipment Co., Ltd.
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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.
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:
| API vs. ASME/ANSI Flanges with the same Dimensions | ||||
| Flange | Pressure Class Rating (psi) | Nominal Size Range (inches) | ||
| ASME/ANSI B16.5 | API 6A | ASME/ANSI B16.5 | API 6A1) | |
| Weld neck | 600 | 2000 | 1/2 - 24 | 113/16 - 11 |
| 900 | 3000 | |||
| 1500 | 5000 | |||
| Blind and Threaded | 600 | 2000 | 113/16 - 211/4 | |
| 900 | 3000 | 113/16 - 203/4 | ||
| 1500 | 5000 | 113/16 - 11 | ||
1) In the old API standard, flanges ranged from 1 1/2 to 10(20) inches.
2. Hastelloy B2 material introduction:
| Standards | : | ASTM, ASME |
| Designation | : | B 564, SB 564 |
| Grade | : | Hastelloy B2 Flanges Hastelloy B2 Flanges: ASTM B 564, ASME SB 564 |
Hastelloy B2 Flanges Chemical Composition
| Hastelloy B2 | |
| Ni | Bal |
| Fe | 2 max |
| Cr | 1.0 max |
| Co | 1.0 max |
| Mo | 26-30 |
| C | 0.02 max |
| Mn | 1.0 max |
| P | 0.04 max |
| S | 0.03 max |
| Si | 0.1 max |
Mechanical & Physical Properties
| Density | 9.2 g/cm3 |
| Melting Point | 1370 °C (2500 °F) |
| Tensile Strength | Psi – 1,10,000 , MPa – 760 |
| Yield Strength (0.2%Offset) | Psi – 51000 , MPa – 350 |
| Elongation | 40 % |
3. Hastelloy B2 Dimensions 6B Flanges API 6A 5000 PSI Working Pressure
| Flanges for Wellhead and Christmas Tree Equipment Weld Neck, Integral, Blinds, Targets and Test Blinds - Pressure Ratings - | |||
| Max Working Pressure | 2000 PSI | 3000 PSI | 5000 PSI |
| Test Pressure | 3000 PSI | 4500 PSI | 7500 PSI |
| Product Spec Levels | 1, 2, 3 and 4 | 1, 2, 3 and 4 | 1, 2, 3 and 4 |
| API Temp Rating | K (-60 ° C) to Y (+345 ° C) | K (-60 ° C) to Y (+345 ° C) | K (-60 ° C) to Y (+345 ° C) |
| Integral, Blind, Target Blind and Test Flanges | |||
| Min. Yield | 60 000 PSI | 60 000 PSI | 60 000 PSI |
| Min. Tensile | 85 000 PSI | 85 000 PSI | 85 000 PSI |
| Material | API 60K | API 60K | API 60K |
| Weld Neck Flanges | |||
| Min. Yield | 45 000 PSI | 45 000 PSI | 45 000 PSI |
| Min. Tensile | 70 000 PSI | 70 000 PSI | 70 000 PSI |
| Material | API 45K | API 45K | API 45K |
| Flanges for Wellhead and Christmas Tree Equipment Weld Neck, Integral, Blinds, Targets and Test Blinds - Pressure Ratings - | |||
| Max Working Pressure | 10 000 PSI | 15 000 PSI | 20 000 PSI |
| Test Pressure | 15 000 PSI | 22 500 PSI | 30 000 PSI |
| Product Spec Levels | 1, 2, 3 and 4 | 1, 2, 3 and 4 | 1, 2, 3 and 4 |
| API Temp Rating | K (-60 ° C) to Y (+345 ° C) | K (-60 ° C) to Y (+345 ° C) | K (-60 ° C) to Y (+345 ° C) |
| Integral, Blind, Target Blind and Test Flanges | |||
| Min. Yield | 60 000 PSI | 75 000 PSI | 75 000 PSI |
| Min. Tensile | 85 000 PSI | 95 000 PSI | 95 000 PSI |
| Material | API 60K | API 75K | API 75K |
| Weld Neck Flanges | |||
| Min. Yield | 60 000 PSI | 75 000 PSI | 75 000 PSI |
| Min. Tensile | 85 000 PSI | 95 000 PSI | 95 000 PSI |
| Material | API 60K | API 75K | API 75K |
