Custom Fire Fighting Pipes,Seamless and Welded Steel Pipes Manufacturer Since 1991.
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Rigid Coupling for Fire Protection | UL Certification

Model ANSI /UL 213
Certificate UL / FM
Standard ANSI /UL 213
Housing Ductile iron ASTM A536, 65-45-12
Bolt & nut Carbon steel, detail as G52 ~G56
Gasket EPDM, nitrile, silicone rubber, etc.
Rated pressure 175 psi (1.21 MPa)
Usage Used to connect two pipes
Surface Red painting / hot dip galvanized

Rigid Coupling

Rigid couplings are used to connect two aligned shafts to transmit power. This coupling requires precise alignment between the shafts, otherwise considerable wear is caused to the bearings and seals. Therefore, it does not allow for movement, and is similar to a rigid flange or welded joint.

They have many advantages, including simple construction, easy assembly, ease of maintenance, low cost, high torque and high torsional rigidity,etc.

Example size

Note: Some of the main specifications are shown below, please contact us for more details.

Size
Dimension(mm)
Bolting(n*bolt size)
inch
DN
mm
F
L
H
ANSI
EN
1″
25
33.7
59
100
44
2 3/8″ x 55
2-M10 x 57
1 1/4″
32
42.4
66
110
45
2 3/8″ x 55
2-M10 x 57
1 1/2″
40
48.3
72
115
45
2 3/8″ x 55
2-M10 x 57
2″
50
60.3
85
131
45
2 3/8″ x 55
2-M10 x 57
2 1/2″
65
73.0
98
145
45
2 3/8″ x 55
2-M10 x 57

One-stop service to facilitate your purchase

The Baolai Group continues to provide service and support after your purchase. To save you time, we offer you numerous value-added services such as processing, logistics management and testing.

Processing Services:

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