BACKING FLANGES (FOR I.D. GAUGE PIPE)

 

I.D. of Pipe Outside Dia. O.D. Inside Dia. I.D. thickness Bolt Circ. Dia. B.C.D. Number of Bolts Dia. Of Bolt Holes Weight
T1 T2 T3 W1 W2 W3
1-1/2 5 2 5/8 3/4 3/4 3-7/8 4 5/8 3.0 3.6 3.6
2 6 2-1/2 5/8 3/4 3/4 4-3/4 4 3/4 3.9 4.7 4.7
2-1/2 7 3 5/8 3/4 3/4 5-1/2 4 3/4 5.2 6.2 6.2
3 7-1/2 3-5/8 5/8 3/4 3/4 6 4 3/4 5.9 7.1 7.1
4 9 4-5/8 5/8 3/4 3/4 7-1/2 8 3/4 7.9 9.5 9.5
5 10 5-5/8 5/8 3/4 3/4 8-1/2 8 7/8 8.9 10.7 10.7
6 11 6-5/8 5/8 3/4 3/4 9-1/2 8 7/8 10.3 12.3 12.3
8 13-1/2 8-5/8 5/8 3/4 7/8 11-3/4 8 7/8 14.7 17.7 20.6
10 16 10-3/4 3/4 1 1 14-1/4 12 1 18.9 30.2 30.2
12 19 12-3/4 3/4 1 1-1/4 17 12 1 32.7 43.5 54.4
14 21 14-3/4 3/4 1-1/8 1-1/4 18-3/4 12 1-1/8 36.6 55 78.6
16 23-1/2 16-3/4 3/4 1-1/8 1-1/2 21-1/4 16 1-1/8 44 66 88.3
18 25 18-3/4 1 1-1/4 1-1/2 22-3/4 16 1-1/4 48.8 81.4 97.6
20 27 20-7/8 1 1-1/4 1-5/8 25 20 1-1/4 69 86.3 112
24 32 24-7/8 1 1-3/8 2 29-1/2 20 1-3/8 88 121 176
30 39 31 1 1-1/2 2-3/8 36 28 1-3/8 117 176 279
36 46 37 1 1-1/2 2-7/8 42-3/4 32 1-5/8 158 237 454

All dimensions in inches

Material: ASTM 285-C or equal for T1 and T2. SA 516-70 or equal for T3.
Drilling: To ANSI B16.1 class 125.
Finish: Metal primer or galvanized.
Note: Backing flanges in T3 series are not stocked in sizes 8” and over.
T1 and T2 thicknesses do not comply with ANSI B31.1 and B31.3.Cald.

 

I.D. SLIP ON BACKING FLANGES

 

I.D. of
Pipe
Outside
Dia.
O.D.
Inside
Dia.
I.D.
WEIGHT
T A B C T
3 7-1/2 3-7/8 3/4 6 4 3/4 7.1
4 9 4-7/8 3/4 7-1/2 8 3/4 9.5
5 10 5-7/8 3/4 8-1/2 8 7/8 10.7
6 11 6-7/8 3/4 9-1/2 8 7/8 12.3
8 13-1/2 8-7/8 3/4 11-3/4 8 7/8 17.7
10 16 11 1 14-1/4 12 1 30.2
12 19 13 1 17 12 1 43.5
14 21 15 1-1/8 18-3/4 12 1-1/8 55
16 23-1/2 17 1-1/8 21-1/4 16 1-1/8 66
18 25 19-1/4 1-1/4 22-3/4 16 1-1/4 81.4
20 27-1/2 21-3/8 1-1/4 25 20 1-1/4 86.3
24 32 25-3/8 1-3/8 29-1/2 20 1-3/8 121
30 39 31-3/4 1-1/2 36 28 1-3/8 176
36 46 37-3/4 1-1/2 42-3/4 32 1-5/8 237
42 53 43-3/4 1-3/4 49-1/2 36 1-5/8 339
48 59-1/2 49-3/4 2 56 44 1-5/8 455

All dimensions in inches

Material: T Mild Steel.
Drilling: ASME B16.5 CL. 150
For maximum working pressure see technical section.

Finish: Galvanized.

 

 CLAD BLIND FLANGES

 

Nominal
Dia.
Outside Dia.

O.D.

thickness
T
Bolt Circ. Dia.

B.C.D.

Number
of Bolts
Dia. of
Bolt Holes
Weight
W
1-1/2 5 3/4 3-7/8 4 5/8 4.3
2 6 3/4 4-3/4 4 3/4 6.2
2-1/2 7 3/4 5-1/2 4 3/4 8.5
3 7-1/2 3/4 6 4 3/4 9.8
4 9 3/4 7-1/2 8 3/4 14
5 10 3/4 8-1/2 8 7/8 17.6
6 11 3/4 9-1/2 8 7/8 21.3
8 13-1/2 3/4 11-3/4 8 7/8 32.2
10 16 1 14-1/4 12 1 58
12 19 1 17 12 1 83.1
14 21 1-1/8 18-3/4 12 1-1/8 113
16 23-1/2 1-1/8 21-1/4 16 1-1/8 142
18 25 1-1/4 22-3/4 16 1-1/4 179
20 27-1/2 1-1/4 25 20 1-1/4 217.5
24 32 1-3/8 29-1/2 20 1-3/8 323
30 38-3/4 1-1/2 36 28 1-3/8 530
36 46 1-1/2 42-3/4 32 1-3/8 755

All dimensions in inches

Blind Flanges are available from stock in galvanized mild steel with stainless steel 316, .078” thick cladding.
Also available upon request in solid stainless steel, primed mild steel, various types and thicknesses of cladding, flange thickness and diameter.