Galvanised Backing Flanges

Galvanised Backing Flanges, (a.k.a backing rings / backup plates), are coated with a protective layer of zinc (galvanised) to resist corrosion.

Stirlings stocks Galvanised Backing Flanges manufactured to ASTM A105N and hot dip galvanised.

Dimensions are to AS2129, and suitable for use as CuNi DIN 86037 composite weld neck type flanges with the appropriate inner solid flange.

Stirlings stocks Galvanised Backing Flanges in Thicknesses from 6.00mm to 25.00mm, in sizes from 25.00mm to 324.00mm. Everything currently in stock is specified in the table below.

● Stocked Item ○ Market Available

Anything not currently in stock/Market Available can be obtained via indent.

Size Pipe
Overall
Internal
PCD
Thick
Thick
Hole
No of
Approx.
Avail

NB
Dia. 
Dia.
 
ness
ness
Dia.
Holes
Wgt 
 

Tube
 
 
 
Standard
86037
 
 
 
 

(mm)
mm
mm
 
 
 
 
 
(Kg)
 

 
 
 
 
 
 
 
 
 
FFADGAL

20 / 25
102
33
73
6
16
14
4
0.67
●

25 / 30
114
40
83
7
16
14
4
0.85
●

32 / 38
121
48
87
8
16
14
4
0.90
●

40 / 44.5
133
54.5
98
9
16
14
4
1.13
●

50 / 57
152
69
114
10
16
19
4
1.44
●

65 / 76
165
88
127
10
16
19
4
1.51
●

80 / 89
184
101
146
11
18
19
4
1.97
●

100 / 108
216
120
178
13
18
19
4
2.54
●

125 / 133
254
145.5
210
13
18
19
8
2.58
●

150 /159
279
171.5
235
17
18
23
8
4.39
●

200 / 219
337
232
292
19
20
23
8
7.39
●

250 / 267
406
280
356
22
22
23
12
11.57
○

300 /324
457
341
406
25
24
27
12
14.37
○

Galvanised Backing Flanges

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