The ASTM B564 Hastelloy N10675 10" BL Flange RF - 150 CLASS is a blind flange conforming to ASTM B564 standard and made of N10675 (Hastelloy C276) material. It features a 10-inch nominal diameter and a 150 CLASS. The pound-level pressure rating and raised-face seal design offer irreplaceable advantages in low-to-medium pressure, highly corrosive environments. HT PIPE supply all different types and scales of flanges. Please feel free to contact us for further product information and pricing.
Blind Flange Structural Characteristics
Body Structure: Includes the sealing surface area, bolt hole bearing area, flange neck (for a necked type, the neck length of a 10" 150 CLASS standard necked blind flange is 50.8mm), and a reinforced transition zone. The fillet radius of the transition zone is ≥6mm to avoid stress concentration.
Wall Thickness Design: According to ASME B16.5, the minimum body wall thickness of a 10" 150 CLASS blind flange is 19.1mm (thickened to 22.4mm in the sealing surface area), 30% thicker than a flat-face welded flange of the same specification, ensuring no deformation during sealing.
Pressure Bearing Advantage: The boreless design allows pressure to be evenly distributed across the entire flange surface, increasing the local pressure bearing capacity by 40% compared to flanges with holes (such as RF face flat-face welded flanges), making it suitable for piping systems with frequent start-stop cycles.
ASTM B564 10" BL Flange RF Chemical Composition (mass fraction)
Nickel (Ni) ≥57%, Chromium (Cr) 14.5%-16.5%, Molybdenum (Mo) 15%-17%, Tungsten (W) 3%-4%, Iron (Fe) 4%-7%, Carbon (C) ≤0.01%, Silicon (Si) ≤0.08%, Manganese (Mn) ≤0.5%, Phosphorus (P) ≤0.04%, Sulfur (S) ≤0.03%.
blind flange hastelloy b3 Corrosion Resistance
Resistant to various corrosive fluids such as hydrochloric acid, sulfuric acid, nitric acid, organic acids, strong alkalis, and chlorinated media (e.g., seawater, chloride solutions). It has particularly good resistance to intergranular corrosion and stress corrosion cracking (SCC) that make it suitable for highly corrosive environments such as chemical and metallurgical industries.
alloy b3 flange Temperature and Mechanical Properties
Long-term operating temperature range is -196℃ (low temperature) to 450℃ (high temperature), the tensile strength is ≥690MPa, yield strength is ≥275MPa, elongation is ≥40%, and hardness is ≤210 HB. ASTM B564 Hastelloy N10675 10 BL Flange RF - 150 CLASS can maintain structural stability under alternating high and low temperature conditions.
hastelloy n10675 flange Manufacturing requirements
According to ASTM B564, N10675 flanges must be manufactured using a forging process, followed by solution treatment (1120-1160℃, water quenching) to ensure uniform material structure and absence of internal defects.
