ISO Approved Manufacturer & Exporter of Blind Flanges / BLRF Flanges.

Blind Flanges / BLRF Flanges

Piyush Steel 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
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