YUHONG Group is a globally recognized manufacturer and supplier of high-performance pressure vessel components, piping systems, and industrial flanges. With over 20 years of expertise in metallurgy and precision engineering, we specialize in delivering ASME, EN, and API-compliant products for the oil & gas, power generation, and chemical processing industries.
Certifications & Standards:
ASME Section VIII Div. 1 & Div. 2
ISO 9001:2015
PED 2014/68/EU
NB/T 47008-2017 (China GB Standards)
YUHONG’s Alloy Steel Channel Cover Flange (ASME SA266 Gr. 2N, Normalized) is designed for critical high-pressure and high-temperature applications in heat exchangers, reactors, and condensers. Manufactured under strict quality control, each flange undergoes normalization heat treatment for improved mechanical properties and PT/UT inspection to ensure zero defects.
✔ Superior Material: Alloy steel (SA266 Gr. 2N) with excellent tensile strength and impact resistance.
✔ Optimized Heat Treatment: Normalized for uniform microstructure and stress relief.
✔ Rigorous Testing: 100% PT (Liquid Penetrant) and UT (Ultrasonic) inspected.
✔ Custom Solutions: Available in ASME B16.5, B16.47, or customer-specified designs.
✔ Corrosion & Fatigue Resistant: Ideal for harsh operating conditions.
✔ Precision Machining: Ensures perfect gasket seating and leak-proof performance.
| Property | Value | Test Standard |
|---|---|---|
| Material Grade | ASME SA266 Gr. 2N (Normalized) | ASME BPVC Sec. II |
| Tensile Strength | 485-655 MPa (70-95 ksi) | ASTM A370 |
| Yield Strength | ≥ 275 MPa (40 ksi) | ASTM A370 |
| Elongation | ≥ 18% | ASTM A370 |
| Impact Toughness | ≥ 27 J (20 ft-lb) at -29°C (-20°F) | ASTM A370 (Charpy V) |
| Parameter | Specification |
|---|---|
| Size Range | 1/2" to 60" (DN15 to DN1500) |
| Pressure Class | Class 150 to Class 2500 (ASME B16.5/B16.47) |
| Temperature Range | -29°C to 425°C (-20°F to 800°F) |
| Face Types | RF (Raised Face), FF (Flat Face), RTJ (Ring Type) |
| Surface Finish | 3.2 μm Ra (125 µin) or better |
| Test Method | Standard | Acceptance Criteria |
|---|---|---|
| PT (Liquid Penetrant) | ASTM E165 | No linear defects > 1.5mm |
| UT (Ultrasonic) | ASTM A388 | No indications > 3mm (per ASME Sec. V) |
YUHONG’s flanges are widely used in:
Shell & Tube Heat Exchangers
Boilers & Condensers
Petrochemical Refineries
Power Plants (Nuclear & Thermal)
Offshore Oil & Gas Platforms
✅ 20+ Years of Expertise in alloy steel fabrication.
✅ Full Traceability: Mill test reports (MTR) & material certifications.
✅ Custom Manufacturing: Tailored dimensions, coatings, and material grades.
✅ Global Supply Chain: Fast delivery to Europe, Middle East, Asia & Americas.
✅ Strict Quality Assurance: ISO 9001 & ASME compliant production.
