Monel Flanges We are catering a qualitative range of Monel Flanges which is available in various grades. These flanges are available in different sizes. As per the international standards, we offer the gamut which is in high in demands in domestic and international markets. Specifications: Standards : ASTM / ASME SB 564 Grades : Monel 400 (UNS No. N04400), Monel 500 (UNS No. N05500)