Blind Flanges / BLRF Flanges
Neminox Steel & Engineering Co. are Manufacturer, Exporter and Supplier of Blind Flanges. ANSI B 16.5 Blind Flanges are ideal for lower pressure applications. Blind Flanges are used on heat coupling of pipes and are customized as per the specifications of our clients. Blind Flanges are made using premium best quality materials.
| Size | : | 1/8" NB TO 48"NB. |
| Class | : | 150#, 300#,400 #,600#,900#, 1500# & 2500 #. |
| Standards | : | ANSI : ANSI B16.5, ANSI B16.47, MSS SP44, ANSI B16.36, ANSI B16.48 |
| DIN | : | DIN2527, DIN2566, DIN2573, DIN2576, DIN2641, DIN2642, DIN2655, DIN2656, DIN2627, DIN2628, DIN2629, DIN 2631, DIN2632, DIN2633, DIN2634, DIN2635, DIN2636, DIN2637, DIN2638, DIN2673 |
| B.S | : | BS4504 , BS4504, BS1560, BS10 |
| Type | : | Threaded, Slip-On, Welding Neck |
Grade:
Stainless Steel Blind Flanges:
ASTM A 182, A 240, F 304, 304L, 304H, 316, 316L, 316Ti, 310, 310S, 321, 321H, 317, 347, 347H,904L,
Nickel Alloys Blind Flanges:
Monel (400 & K500)
Inconel (600, 601, 625 & 825)
Incolloy (800, 800H)
Alloy 20
Cupro Nickel (90/10, 70/30, 66/30/2/2)
Hastelloy (C-4, C-22, C276, B-2)
Nickel (200 / 201 / 205)
Duplex Steel
SS 904L
Titanium (1 & 2) Etc.
Carbon Steel Blind Flanges:
ASTM A 105, ASTM A 181
Alloy Steel Blind Flanges:
ASTM A 182, GR F1, F11, F22, F5, F9, F91
Copper Alloys Blind Flanges:
UNS No. C 10100, 10200, 10300, 10800, 12000, 12200, 70600, 71500, UNS No. C 70600 (Cu -Ni- 90/10), C 71500 (Cu -Ni- 70/30) Copper, Brass & Gunmetal
Dimensions of Blind Flanges ASME B16.5
NPS ½
| Class | 150 | 300 | 400 | 600 | 900 | 1500 | 2500 |
| Diameter - D | 90 | 95 | 95 | 95 | 120 | 120 | 135 |
| Height - B | 9.6 | 12.7 | 14.3 | 14.3 | 22.3 | 22.3 | 30.2 |
| 11.2 | 14.3 | 20.7 | 20.7 | 28.7 | 28.7 | 36.6 | |
| Diameter - G | 35.1 | 35.1 | 35.1 | 35.1 | 35.1 | 35.1 | 35.1 |
| Diameter - K | 60.3 | 66.7 | 66.7 | 66.7 | 82.6 | 82.6 | 88.9 |
| Bolt Holes | 4 | 4 | 4 | 4 | 4 | 4 | 4 |
| Diameter - L | 15.9 | 15.9 | 15.9 | 15.9 | 22.2 | 22.2 | 22.2 |
| Stud Bolts Diameter x Length | |||||||
| Diameter (in) | 1/2 | 1/2 | 1/2 | 1/2 | 3/4 | 3/4 | 3/4 |
| Length (mm) | 55 | 65 | 75 | 75 | 110 | 110 | 120 |
Dimensional Tolerances of Blind Flanges ASME B16.5
| 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 |
