Blind Flange

BLIND FLANGES are used to blank off the ends of piping, valves and pressure vessel opening. From the standpoint of internal pressure and bolt loading, blind flanges, particularly in the larger sizes, are the most highly stressed of all flange types; however, since the maximum stresses in a blind flange are bending stresses at the center, they can safely be permitted to be higher than in other types of flanges.
 
 
Specification:
Manufacturing standards: ANSI B 16.5, BS 1560. BS 10, IS 6392, B-2.1 NPT, API, DIN, JIS. MSS SP 44
Stainless Steel: ASTM A182 F304/ 304L/ 304H/ 316/ 316L/ 317/ 317L/ 321/ 310/ 347/ 904Letc.
Duplex Stainless Steel: UNS S31803, 2205 
Carbon Steel: ASTM A105/ A694 F42/ 46/52/56/60/65/70/A350 LF3/A350 LF2, etc.
Alloy Steel: ASTM A 182, GR F1, F11, F22, F5, F9, F91 
Size: 1/8" NB to 48"NB 
Class: 150, 300, 400, 600, 900, 1500 & 2500
The surface forms: according to customer requirements
 
密封面型式 公称压力PN/MPa
(bar)
 0.25
(2.5)
 0.6
(6)
1.0
(10) 
1.6
(16)
 2.5
(25)
4.0
(40)
6.3
(63)
10.0
(100)
16.0(160) 25.0
(250)
突面(RF)   DN10-2000 DN10-1200 DN10-600 DN10-400 DN10-300
凹凸面(MFM) - DN10-600 DN10-400 DN10-300 -
榫槽面(TG) - DN10-600 DN10-400 DN10-300 -
全平面(FF) DN10-600 DN10-1200 -
环连接面(RJ) - DN15-400 DN15-300
 
 
密封面型式 公称压力PN (MPa)
(Class)
2.0
Class 150
5.0
Class 300
11.0
Class 600
15.0
Class 900
26.0
Class 1500
42.0
Class 2500
突面(RF) DN15-600
(1/2"-24")
DN15-300
(1/2"-12")
凹凸面(MFM) - DN15-600
(1/2"-24")
DN15-300
(1/2"-12")
榫槽面(TG) - DN15-600
(1/2"-24")
DN15-300
(1/2"-12")
全平面(FF) DN15-600
(1/2"-24")
-
环连接面(RJ) DN25-600
(1"-24")
DN15-600
(1/2"-24")
DN15-300
(1/2"-12")