flange ansi 300lbs blind rf

Carbon steel flanges

flange ansi 300lbs blind rf

Carbon steel blind flange

Technical specification

TOLERANCES (according to UNI 6100-67)

DIMENSION SIZE TOLERANCES
D
Outside diameter
≤ DN 200 ± 1,0
> DN 200 ≤ DN 300 ± 1,5
> DN 300 ≤ DN 400 ± 2,0
> DN 400 ± 2,0
d1
Outside diameter of neck
≤ DN 100 +0,5 -0
> DN 100 ≤ DN 400 +1,0 -0,5
> DN 400 +1,5 -1,0
d1
Bore diameter
≤ DN 80 +0,5 -0
> DN 80 ≤ DN 350 +1,0 -0
> DN 350 ≤ DN 400 +1,5 -0
> DN 400 +5
b
Thickness
≤ DN 10 ± 0,5
> DN 10 ≤ DN 20 ± 0,8
> DN 20 ≤ DN 50 ± 1,0
> DN 50 ± 1,5
d3
Neck diameter
+1 -0
h1
Length through hub
≤ DN 80 ± 1,5
> DN 80 ≤ DN 250 ± 2,0
> DN 250 ± 3,0
S
Wall thickness
≤ DN 100 +1,0 -0
> DN 100 ≤ DN 400 +1,5 -0
> DN 400 +2,0 -0
d4
Diameter of contact face
≤ DN 80 +0 -1,0
> DN 100 ≤ DN 400 +0 -2,0
> DN 400 +0 -3,0
k
Diameter of bolt circle
≤ DN 250 ± 1,5
> DN 250 ≤ DN 600 ± 2,0
> DN 600 ± 3,0
Centre-to-centre of adjacent bolt holes ± 0,4
Max. eccentricity between bolt circle dia. K and machined facing diameters +0,8 -0
Surface parallelism
d2
Holes diameter
≤ DN 300 +2 -0
> DN 30 +3 -0

DIMENSIONAL TOLERANCES (ANSI B 16.5)

D Outside Diameter* Slip-on, Blind and Welding neck flanges When OD is 24" or less ±1,6 mm
When OD is over 24" ±3,2 mm
J Inside Diameter Slip-on flanges 10" and smaller +0,8 mm
12" and larger +1,6 mm
Inside Diameter** Welding neck flanges 10" and smaller +0,8 mm
12" to 18" +1,6 mm
20" and larger +3,2 mm -1,6 mm
g Diameter of Contact Face Slip-on, Blind and Welding neck flanges 1,6 mm Raised Face ±0,8 mm
6,4 mm Raised Face ±0,5 mm
a Diameter of Hub at Point of Welding Welding neck flanges 5" and smaller +2,4 mm -0,8 mm
6" and larger +4,0 mm -0,8 mm
m Outside Diameter of Hub* Slip-on and Blind flanges 12" and smaller +2,4 mm -1,6 mm
14" and larger ±3,2 mm
Diameter of Hub at Base* Welding neck flanges When Hub Base is 24" or less ±1,6 mm
When Hub Base is over 24" ±3,2 mm
i Drilling and facing Slip-on, Blind and Welding neck flanges Bolt Circle Diameter k 1,6 mm
Center-to-center of adjacent bolt holes ±0,8 mm
mmMax. eccentricity between bolt circle dia. kand machined facing diameters  
 
sizes 2½" and smaller 0,8 mm
sizes 3" and larger 1,6 mm
h Overall Length of Hub Slip-on and Blind flanges 18" and smaller +3,2 mm -0,8 mm
20" and larger +4,8 mm -1,6 mm
Welding neck flanges 10" and smaller ±1,6 mm
12" and larger ±3,2 mm
b Thickness Slip-on, Blind and Welding neck flanges 18" and smaller +3,2 mm
20" and larger +4,8 mm

* This tolerance is not covered by ANSI B 16.5

** Undependent of the tolerances of the measures J and a, the wall thickness shall not be less than 87,5% of the nominal wall thickness

TOLERANCES (according to EN 1092-1:2007)

Dimension Flange type Size Tolerance mm
Outside diameter of neck d1 11 ≤DN 125 0 to +3,0
>DN 125 ≤ DN 1200 0 to +4,5
>DN 1200 0 to +6,0

Bore diameter d1
01, 02 ≤DN 100 0 to +0,5
>DN 100 ≤ DN 400 0 to +1,0
>DN 400 ≤ DN 600 0 to +1,5
>DN 600 0 to +3,0
Wall thickness S 11  
Machined neck machined or (both faces)
Neck one face machined or unmachined
≤DN 100
0 to +1,0
0 to +2,0
≤DN 100
0 to +1,5
0 to +2,5
≤DN 100
0 to +2,0
0 to +3,5

Outside diameter D
01, 02, 05, 11, 13 ≤DN 150 ±2,0
>DN 150 ≤ DN 500 ±3,0
>DN 500 ≤ DN 1200 ±5,0
>DN 1200 ≤ DN 1800 ±7,0
>DN 1800 ±10,0

Length through hub h1
11 ≤DN 80 ±1,5
>DN 80 ≤ DN 250 ±2,0
>DN 250 ±3,0

Neck diameter d3
11 ≤DN 50 0 to -2,0
>DN 50 ≤ DN 150 0 to -4,0
>DN 150 ≤ DN 300 0 to -6,0
>DN 300 ≤ DN 600 0 to -8,0
>DN 600 ≤ DN 4000 0 to -10,0

Neck diameter d3
13 ≤DN 50 0 to +1,0
>DN 50 ≤ DN 150 0 to +2,0
>DN 150 ≤ DN 300 0 to +4,0
>DN 300 ≤ DN 600 0 to +8,0
>DN 600 ≤ DN 1200 0 to +12,0
>DN 1200 ≤ DN 1800 0 to +16,0
>DN 1800 0 to +20,0

Flange thickness b
All types (machined on both faces) ≤18 mm thickness -1,3 to +1,0
>18mm ≤50mm thickness ±1,5
> 50 mm thickness ±2,0

Flange thickness b
All types (machined on front face only) Type 02 and 04 (un- machined) ≤18 mm thickness -1,3 to +2,0
>18mm ≤50mm thickness -1,5 to +4,0
> 50 mm thickness -2,0 to +7,0

Diameter of bolt circle K
01, 02, 05, 11, 13 Bolt sizes M10 to M24 ±1,0
Bolt sizes M27 to M45 ±1,5

Center-to-center of adjacent bolt holes
01, 02, 05, 11, 13 Bolt sizes M10 to M24 ±1,0
Bolt sizes M27 to M45 ±1,5

Eccentricity of machined facing diameters
01, 02, 05, 11, 13 ≤ DN 65 1,0
> DN 65 2,0
Type 01 - Plate Flanges Type 02 - Plate Flanges Type 05 - Plate Flanges Type 11 - Plate Flanges Type 13 - Threaded Flanges


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flange ansi 300lbs blind rf

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