Short Description

Model No.: F51-BLRF-Flange-10"-CL1500

China Flange Manufacturer www.steeljrv.com offers ASME B16.5 ASTM A182 F51 BLRF Flange, 10″, CL1500.

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Key Specifications / Features

Type: F51 BLRF Flange
Material: F51
Pressure: 1500#
Size: DN250  (10″)
Standard: ANSI
Ends: RF

What is a Blind Flange?
A Blind flange is round plate which has all of the relevant boltholes but no center hole, and because of this feature this flange is used to close off the ends of a piping systems and pressure vessel openings. It also permits easy access to the interior of a line or vessel once it has been sealed and must be reopened.
The blind flange is used to close ends of piping systems. It is a kind of round plate with no center hold but with all the proper bolt holes. This blind flange is available in various sizes and materials and is used to provide positive closer on the ends of pipes, valves or equipment nozzles. This flange helps in easy access to a line once it has been sealed. The blind flange is sometimes custom made or machined to accept a nominal sized pipe to which reduction is being made.
We are manufacturer of Blind Flanges and supply high quality Blind Flanges in both large and small quantities worldwide and offer you the best prices in the market.
Blind Flanges are commonly used in petrochemical, pipe engineering, public services & water works.
Blind pipe flanges are often used for high pressure applications.
This reduction can be a threaded reduction or welded reduction.

Composition ranges for 2205 (F51) grade stainless steels

Grade

 

C

Mn

Si

P

S

Cr

Mo

Ni

N

2205 (S31803)

Min

Max

0.030

2.00

1.00

0.030

0.020

21.0

23.0

2.5

3.5

4.5

6.5

0.08

0.20

2205 (S32205)

Min

Max

0.030

2.00

1.00

0.030

0.020

22.0

23.0

3.0

3.5

4.5

6.5

0.14

0.20

Details of Blind flange
flg bl det - ASME B16.5 ASTM A182 F51 BLRF Flange 10" CL1500
1. Blind flange 2. Stud Bolt 3. Gasket 4. Other flange

ASME/ANSI B16.5 Class 1500 BLRF Flange

Nominal Pipe Size  Outside Diameter of Flange Diameter of Raised Face Thickness of Flanges Min. Diameter of Bolt Circle Diameter of Bolt Holes Number of Bolts Approximate Weight kgs
NPS O R tf W I n
1/2 120 34.9 22.3 82.6 22.2 4 1.76
3/4 130 42.9 25.4 88.9 22.2 4 2.42
1 150 50.8 28.6 101.6 25.4 4 3.63
1 1/4 160 63.5 28.6 111.1 25.4 4 4.24
1 1/2 180 73.0 31.8 123.8 28.6 4 5.95
2 215 92.1 38.1 165.1 25.4 8 10.02
2 1/2 245 104.8 41.3 190.5 28.6 8 14.11
3 265 127.0 47.7 203.2 31.8 8 18.99
4 310 157.2 54.0 241.3 34.9 8 29.83
5 375 185.7 73.1 292.1 41.3 8 58.77
6 395 215.9 82.6 317.5 38.1 12 72.65
8 485 269.9 92.1 393.7 44.5 12 123.34
10 585 323.8 108.0 482.6 50.8 12 211.94
12 675 381.0 123.9 571.5 54.0 16 318.94
14 750 412.8 133.4 635.0 60.3 16 422.42
16 825 469.9 146.1 704.8 66.7 16 558.96
18 915 533.4 162.0 774.7 73.0 16 763.84
20 985 584.2 177.8 831.8 79.4 16 968.52
24 1170 692.2 203.2 990.6 92.1 16 1566.88

Dimensional Tolerances of Blind Flanges ASME/ANSI B16.5

Outside Diameter
≤ 24 = 1.6 mm | > 24 = ± 3.2 mm
Inside Diameter
not applicable
Diameter of Contact Face
1.6 mm Raised Face = ± 0.8 mm
6.35 mm Raised Face, Tongue & Groove / Male-Female = ± 0.4 mm
Outside Diameter of Hub
≤ 12 = + 2.4 mm / – 1.6 mm | ≥ 14 = ± 3.2 mm
Diameter of Counterbore
not applicable
Drilling
Bolt Circle = 1.6 mm | Bolt Hole Spacing = ± 0.8 mm
Eccentricity of Bolt Circle with Respect to Facing
≤ 2½ = 0.8 mm max. | ≥ 3 = 1.6 mm max.
Thickness
≤ 18 = + 3.2 mm / – 0 | ≥ 20 = + 4.8 mm / – 0
Length thru Hub
≤ 18 = + 3.2 mm / – 0.8 mm | ≥ 20 = + 4.8 mm / – 1.6 mm

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