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[4] FLANGES
Outside Diameter
of Hub
≤
24
± 1/16
Inside Diameter
Threaded
Within limits of
boring gauge
Socket Weld, Slip
on
≤
10, + 1/32, -0
≥
12 + 1/16, -0
Outside Diameter
of Hub
≤
12
+ 3/32
- 1/16
≥
14
± 1/8
Diameter of
Contact Face
1/16 Raised Face
± 1/32
1/4 Raised face
tongue & Groove
male, female
± 1/64
Drilling
Bolt Circle
± 1/16
Bolt Hole Spacing
± 1/32
Concentricity of
bolt circle
NPS
≤
2 1/2 1/32
max
NPS
≥
3
1/16 max
Thickness
≤
18
+ 1/8, -0
≥
20
+3/16, -0
Length through
the Hub
≤
18
+1/8, -1/32
≥
20
+3/16, -1/16
Outside Diameter
≤
24
± 1/16
Inside Diameter
≤
10
± 1/32
12 through 18
± 1/16
≥
20
+1/8, - 1/16
Diameter of
Contact Face
1/16 Raised Face
± 1/32
1/4 Raised face
tongue & Groove
male, female
± 1/64
Diameter of Hub
at Base
≤
24
± 1/16
> 24
± 1/8
Diameter Of Hub
at Point Of Welding
NPS
≤
5
+ 3/32
-1/32
NPS
≥
6
+ 5/32
-1/32
Drilling
Bolt Circle
± 1/16
Bolt Hole Spacing
± 1/32
Concentricity
of bolt circle
NPS
≤
2 1/2
1/32 max
NPS
≥
3
1/16 max
Thickness
≤
18
+1/8
-0
≥
20
+3/16
-0
Length through
the Hub
NPS
≤
4
± 1/16
5
≤
NPS
≤
10
+1/16
-1/8
NPS
≥
12
+ 1/8
-3/16
SPECIFICATIONS:
ANSI B16.5 - Pipe Flanges and Flanged Fittings (American)
AS2129 - Flanges for Pipes, Valves and Fittings (Australian)
BS4504 - Circular Flanges for Pipe, Valves and Fittings (PN designated) - (now BS EN1092) (European)
AS4087 - Metallic Flanges for Waterworks Purposes (Australian)
BS10 - Specification for Flanges and bolting for Pipes, Valves and Fittings (British)
**AS2129 is a replica of BS10 but is stated in mm rather than inches. In some sizes bolt holes are slightly larger to give
better clearance
APPLICATION:
Water Supply, Oil, Gas, Petrochemical, Irrigation, Fire Services, General Industry, Construction.
MARKING:
All Flanges when possible will display a heat number, size, table, grade and dimensional standard
PLATE STEEL FLANGES:
Plate flanges are mainly used for light duty, lower pressure or non-critical applications, commonly
referring to AS2129, BS10 or AS4087 standards. The manufacturing method involves cutting and machining from plate steel
FORGED STEEL FLANGES:
Forged Steel flanges are commonly used and specified in the Oil, Gas, Petrochemical and
mining sectors, where pressure, temperature and safety considerations often specify the ANSI B16.5, ASME B16.47 or
BS4504 standards. The manufacturing method involves the hot forging of suitable steels prior to final machining
MATERIALS
Mild Carbon Steel
ASTM A105
ASTM A182 316L
AAP CAN ALSO OFFER A WIDE RANGE OF PRODUCTS ON REQUEST WHICH INCLUDE
BS4504 (DIN) flanges from PN6 TO PN40
Dimension Tolerance for ANSI B16.5
Threaded, Socket Welding. Slip-On, Lap Joint and Blind
Weld Neck
Specifications
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