Flanges
 British
Standard Flanges |
|
An ISO certified company, Horizon Mercantile is involved in the
manufacturing and exporting of a wide range of flanges of various
classes. We not only manufacture flanges as per American Standards but
also as per British Standards. Our British Standard flanges are of weld
neck, slip on, threaded, plate and blank type made under different
specifications. The two most important British standards according to
which we produce our flanges are BS 3293 and BS 4504, the details of
which are given below.
BS
3293 Flanges |
|
We produce carbon steel flanges of British standard BS 3293: 1960 which
are over 24 inches nominal size and used in the petroleum industry. Such
flanges cover class 150 lb to class 600 lb weld neck and slip on
flanges.
Technical Specification
| Dimension |
Tolerance |
| in |
mm |
| Weld
Neck and Slip On Flanges (pages 8-56 to 8-59) |
G (raised face
diameter) |
±1/64 |
±0.40 |
| C (flange thickness) |
+3/16,
-0 |
+4.76,
-0 |
| D (overall length) |
±1/8 |
±3.18 |
| E (outside diameter
at welding end of weld neck hub) |
+5/32,
-1/32 |
+3.97,
-0.79 |
| B (inside diameter
of weld neck flange) |
+1/8,
-1/16 |
+3.18,
-1.59 |
| B
(inside diameter of slip on flange) |
+1/16,
-0 |
+1.59,
-0 |
| Ring
Joint Facing on Weld Neck and Slip On Flanges (see below) |
L (depth of groove) |
+1/64,
-0 |
+0.40,
-0 |
| M (width of groove) |
±0.008 |
±0.20 |
| K (pitch diameter of
groove) |
±0.005 |
±0.13 |
Types
BS
4504 Circular Flanges |
|
As per British Standard BS 4504, we offer Circular Flanges for Pipes,
Valves and Fittings (PN Designated). We offer flanges in nominal
pressure ranges PN 2.5 to PN 40 and nominal sizes up to DN 4000.
Summary of flanges covered by BS 4504
| Code No. |
Description
|
PN Range
|
DN Range |
| 101 |
Plate flange for
welding |
PN 2.5 |
DN 10 to DN 2000 |
| PN 6, 10, 16, 25, 40 |
DN 10 to DN 600 |
| 102 |
(Weld-on plate collar = Code 132
Lapped pipe end = Code 133) |
PN 6, 10, 16, 25, 40 |
DN 10 to DN 600 |
| 104 |
Loose plate flange with weld-neck
collar (Weldneck collar = Code 134) |
PN 6, 10, 16, 25, 40 |
DN 10 to DN 600 |
| 105 |
Blank flange |
PN 2.5, 6 |
DN 10 to DN 2000 |
| PN 10, 16 |
DN 10 to DN 1200 |
| PN 25, 40 |
DN 10 to DN 600 |
| 111 |
Weld-neck flange |
PN 2.5, 6, 10, 16 |
DN 10 to DN 2000 |
| PN 25 |
DN 10 to DN 1000 |
| PN 40 |
DN 10 to DN 600 |
| 112 |
Hubbed slip-on flange
for welding |
PN 6 |
DN 10 to DN 300 |
| PN 10, 16, 25, 40 |
DN 10 to DN 600 |
| 113 |
Hubbed threaded flange |
PN 6, 10, 16, 25, 40 |
DN 10 to DN 150 |
| 121 |
Integral flange |
PN 6, 10, 16, 25 |
DN 10 to DN 2000 |
| PN 40 DN 10 to DN 600 |
|
Types
|
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