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Pentagon Steel India is the country’s leading supplier, exporter, and producer of blind flanges. Stainless steel, alloy steel, carbon steel, duplex steel, copper nickel alloy, hastelloy, titanium, alloy 20, monel, and inconel blind flanges. This is a flange without a bore that is used to close off a piping system or vessel opening. It also provides easy access to vessels or pipe systems for inspection. Blind flange can be supplied with or without hubs at the manufacturers’ discretion.
| Material of Construction | Standard | Grades |
| Stainless Steel Blind Flanges | ASTM A182 , A240 | F 304, 304L, 304H, 316, 316Ti, 316H, 316L, 316LN, 309S, 309H, 310S, 310H,317, 317L, 321, 321H, 347, 347H, 201, 202, 904L |
| Carbon Steel Blind Flanges | ASTM A105 | Gr. F42,46,52,56,60,65,70 |
| Alloy Steel Blind Flanges | ASTM A182 | F1,F5,F9,F11,F22,F91 |
| Nickel Alloy Blind Flanges | ASTM SB564, SB160, SB472, SB162 | Nickel 200 (UNS No. N02200), Nickel 201 (UNS No. N02201), Monel 400 (UNS No. N04400), Monel 500 (UNS No. N05500), Inconel 800 (UNS No. N08800), Inconel 825 (UNS No. N08825), Inconel 600 (UNS No. N06600), Inconel 625 (UNS No. N06625), Inconel 601 (UNS No. N06601), Hastelloy C 276 (UNS No. N10276), Alloy 20 (UNS No. N08020), |
| Copper Alloys Blind Flanges | ASTM SB 61 , SB62 , SB151 , SB152 | UNS No. C 70600 (Cu-Ni 90/10), C 71500 (Cu-Ni 70/30), UNS No. C 10100, 10200, 10300, 10800, 12000, 12200, |
| Low Temperature Carbon Steel Blind Flanges | ASTM A350 | LF2 , LF3 |
| Duplex Steel Blind Flanges | ASTM A182, A240 | UNS F 44, F 45, F51, F 53, F 55, F 60, F 61 |
| Outside Diameter ≤ 24 = 1.6 mm | > 24 = ± 3.2 mm | Inside Diameter not applicable |
| Diameter of Contact Face 1.6 mm Raised Face = ± 0.8 mm 6.35 mm Raised Face, Tongue & Groove / Male-Female = ± 0.4 mm | Outside Diameter of Hub ≤ 12 = + 2.4 mm / - 1.6 mm | ≥ 14 = ± 3.2 mm |
| Diameter of Counterbore not applicable | Drilling Bolt Circle = 1.6 mm | Bolt Hole Spacing = ± 0.8 mm Eccentricity of Bolt Circle with Respect to Facing ≤ 2½ = 0.8 mm max. | ≥ 3 = 1.6 mm max. |
| Thickness ≤ 18 = + 3.2 mm / - 0 | ≥ 20 = + 4.8 mm / - 0 | Length thru Hub ≤ 18 = + 3.2 mm / - 0.8 mm | ≥ 20 = + 4.8 mm / - 1.6 mm |
Pentagon Steel India, India’s leading manufacturer, supplier, and exporter of flanges and pipe fittings. As an ISO-certified company, we produce pipeline flanges, fittings, customized fasteners, and fabricated items according to ASTM, EN, API, JIS, ISS, BSS, DIN, and custom standards.
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