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SW&THD Fittings General
Class Rates
Socket-Welding Fittings
Threaded Fittings
Branch Outlets
Swaged Nipples
SW& THD Unions
Approx Weight

Class Rates 


Types of Fittings by Class Designation and NPS Size Range

Description
 Socket--Welding
Threaded
CL3000
CL6000
CL9000
CL2000
CL3000
CL6000
45°, 90° Elbows
1/8--4
1/8--2
1/2--2
1/8--4
1/8--4
1/8--4
Tees, Crosses, Couplings
1/8--4
1/8--2
1/2--2
1/8--4
1/8--4
1/8--4
Half-Couplings
1/8--4
1/8--2
1/2--2
1/8--4
1/8--4
Cap
1/8--4
1/8--2
1/2--2
1/8--4
1/8--4
Square,Hex,Round Plug
1/8--4(Note)
Hex,and Flush Bushing
1/8--4(Note)

Note: Plugs and bushings are not identified by class designation.They may be used for ratings up through Class 6000 designation.




Correlation of Fittings Class With Schedule Number or Wall Designation of Pipe for Calculation of Ratings
Class of Fitting
Type of Fitting
Pipe used for rating Basis
Schedule No.
Wall Designation
CL2000
Threaded
80
XS
CL3000
Threaded
160
CL6000
Threaded
XXS
CL3000
Socket-welding
80
XS
CL6000
Socket-welding
160
CL9000
Socket-welding
XXS

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