ASME B16.5 Forged Carbon Steel Raised Face (RF) Blind Flange
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Material Grade
Carbon Steel: ASTM A105 / A105N，ASTM A350 LF2 / LF3，ASTM A694 F42 / 46 / 56 / 60 / 65
Stainless Steel: ASTM A182 F304/304L/304H, 316/316L, 310S, 317,347,904L，ASTM A182 F51, F53, F44
Alloy Steel: ASTM A182 F11 / 12 / 5 / 9 / 91 / 92
Sealing Face: RF, FF, FTJ
Class 150 lb blind Flange Dimensions
NPS |
A |
C |
G |
H |
I |
J |
W |
INCH |
INCH |
INCH |
NO. OF HOLES |
INCH |
INCH |
KG/PC |
|
MM |
MM |
MM |
MM |
MM |
|||
1/2 |
3.5 |
0.44 |
1.38 |
4 |
0.62 |
2.38 |
0.42 |
88.9 |
11.2 |
35.1 |
15.7 |
60.45 |
|||
3/4 |
3.88 |
0.5 |
1.69 |
4 |
0.62 |
2.75 |
0.61 |
98.6 |
12.7 |
42.9 |
15.7 |
69.85 |
|||
1 |
4.25 |
0.56 |
2 |
4 |
0.62 |
3.12 |
0.86 |
108 |
14.2 |
50.8 |
15.7 |
79.25 |
|||
1¼ |
4.62 |
0.62 |
2.5 |
4 |
0.62 |
3.5 |
1.17 |
117.3 |
15.7 |
63.5 |
15.7 |
88.9 |
|||
1½ |
5 |
0.69 |
2.88 |
4 |
0.62 |
3.88 |
1.53 |
127 |
17.5 |
73.15 |
15.7 |
98.6 |
|||
2 |
6 |
0.75 |
3.62 |
4 |
0.75 |
4.75 |
2.42 |
152.4 |
19.1 |
91.9 |
19.1 |
120.7 |
|||
2½ |
7 |
0.88 |
4.12 |
4 |
0.75 |
5.5 |
3.94 |
177.8 |
22.4 |
104.6 |
19.1 |
139.7 |
|||
3 |
7.5 |
0.94 |
5 |
4 |
0.75 |
6 |
4.93 |
190.5 |
23.9 |
127 |
19.1 |
152.4 |
|||
3½ |
8.5 |
0.94 |
5.5 |
8 |
0.75 |
7 |
6.17 |
215.9 |
23.9 |
139.7 |
19.1 |
177.8 |
|||
4 |
9 |
0.94 |
6.19 |
8 |
0.75 |
7.5 |
7 |
228.6 |
23.9 |
157.2 |
19.1 |
190.5 |
|||
5 |
10 |
0.94 |
7.31 |
8 |
0.88 |
8.5 |
8.63 |
254 |
23.9 |
185.7 |
22.4 |
215.9 |
|||
6 |
11 |
1 |
8.5 |
8 |
0.88 |
9.5 |
11.3 |
279.4 |
25.4 |
215.9 |
22.4 |
241.3 |
|||
8 |
13.5 |
1.12 |
10.62 |
8 |
0.88 |
11.75 |
19.6 |
342.9 |
28.4 |
269.7 |
22.4 |
298.5 |
|||
10 |
16 |
1.19 |
12.75 |
12 |
1 |
14.25 |
28.8 |
406.4 |
30.2 |
323.9 |
25.4 |
362 |
|||
12 |
19 |
1.25 |
15 |
12 |
1 |
17 |
43.2 |
482.6 |
31.75 |
381 |
25.4 |
431.8 |
|||
14 |
21 |
1.38 |
16.25 |
12 |
1.12 |
18.75 |
58.1 |
533.4 |
35.1 |
412.8 |
28.4 |
476.3 |
|||
16 |
23.5 |
1.44 |
18.5 |
16 |
1.12 |
21.25 |
76 |
596.9 |
36.6 |
469.9 |
28.4 |
539.8 |
|||
18 |
25 |
1.56 |
21 |
16 |
1.25 |
22.75 |
93.7 |
635 |
39.6 |
533.4 |
31.75 |
577.9 |
|||
20 |
27.5 |
1.69 |
23 |
20 |
1.25 |
25 |
122 |
698.5 |
42.9 |
584.2 |
31.75 |
635 |
|||
24 |
32 |
1.88 |
27.25 |
20 |
1.38 |
29.5 |
185 |
812.8 |
47.8 |
692.2 |
35.1 |
749.3 |
Main Applications
1.Petrochemical Industry: Used for plugging high-pressure reactors, storage tank interfaces, or isolating pipelines with toxic/flammable media for maintenance.
2.Power Engineering: Temporarily isolating equipment (such as valves and pumps) in steam or cooling water pipeline systems, or closing end ports for future expansion.
3.Water Treatment and Municipal Engineering: Applied to temporary plugging and pressure testing of sewage treatment plant pipelines, or temporary sealing of tap water pipeline ends.
4.Marine and Offshore Engineering: Closing the ends of ship pipelines or isolating pipeline systems during vessel maintenance to ensure safety.
5.Pharmaceutical and Food Industry: Temporarily isolating sections in clean pipeline systems to meet maintenance needs in aseptic environments and prevent contamination.
Advantages
1.Strong Sealing Performance: The solid structure combined with gasket design effectively prevents leakage of high-pressure, toxic, or flammable media, ensuring system safety.
2.Convenient and Flexible Installation: Connected by bolts (no welding required), enabling quick installation and disassembly, ideal for temporary isolation or frequent maintenance scenarios.
3.Reusability: Can be reused after disassembly, reducing long-term maintenance costs, especially suitable for pipeline systems with reserved expansion interfaces.
4.Wide Adaptability: Available in various pressure ratings (e.g., low pressure, high pressure) and sealing surface types (flat face, raised face, ring joint face), compatible with different working conditions.
5.Cost-Effectiveness: Lower initial procurement and maintenance costs compared to permanent welded closures, while combining functions of temporary plugging and long-term use.
