Threaded Fitting

Threaded pipe fittings, abbreviated as THRDF, are generally four inches and smaller.  The reason for this size constraint is the pipe end needs to be threaded with a male type connection and die sizes are unobtainable in the larger diameters.

• 45 Elbow, 90 Elbow, Cross, Lateral, Tee
  • Class 2000 - for use with Sch. 80 pipe.
  • Class 3000 - for use with Sch. 160 pipe.
  • Class 6000 - for use with Sch. XXH pipe.

• Half Coupling, Full Coupling, Reducer, Round Cap, Union, Hammer Lug Union
  • Class 3000 - for use with Sch. 160 pipe.
  • Class 6000 - for use with Sch. XXH pipe.

• Bushing (Flush and Hexagon)
  • Bushings are not identified by class and can be used for all classes.

• Plug (Hexagon Head, Round Head and Square Head)
  • Plugs are not identified by class and can be used for all three classes.

• Dimensions and tolerances in accordance with ANSI/ASME B16.11 - Forged Fittings, Socket-Welding and Threaded
• Specifications for carbon steel forgings in accordance with ASTM A105
• Threads in accordance with ANSI/ASME B1.20.1.  All internal and external threads shall be threaded with American National Standard Taper Pipe Threads.
• FCS - forged carbon steel

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Forged Fittings Socket and Threaded Types

Pressure Class	2000	3000	6000	9000
Socket Fitting	-	80/XH	160	XXH
Threaded Fitting	80/XH	160	XXH	-

Note:  Class designations correspond to the maximum cold working pressure of fittings in pounds force per square inch.

The following links are for datasheets for the threaded fitting range sizes covered by ASME B16.11.  If you would like to browse the datasheets for pipe fittings, please visit our Fittings Datasheets page.

Fitting	2000	3000	6000	9000
45 Elbow	1/8 - 4	1/8 - 4	1/8 - 4	-
90 Elbow	1/8 - 4	1/8 - 4	1/8 - 4	-
Bushing, Flush	1/8 - 4	1/8 - 4	1/8 - 4	-
Bushing, Hex	1/8 - 4	1/8 - 4	1/8 - 4	-
Cap, Round	-	1/8 - 4	1/8 - 2	-
Coupling, Full	-	1/8 - 4	1/8 - 4	-
Coupling, Half	-	1/8 - 4	1/8 - 4	-
Cross	1/8 - 4	1/8 - 4	1/8 - 4	-
Lateral	-	1/4 - 2	1/4 - 1 1/4	-
Plug. Hex Head	1/8 - 4	1/8 - 4	1/8 - 4	-
Plug, Round Head	1/8 - 4	1/8 - 4	1/8 - 4	-
Plug, Square Head	1/8 - 4	1/8 - 4	1/8 - 4	-
Reducer	-	1/8 - 4	1/8 - 4	-
Street Ell	-	1/8 - 2	1/8 - 2	-
Tee	1/8 - 4	1/8 - 4	1/8 - 4	-
Union	-	1/8 - 3	1/8 - 2	-

Notes:

• Plugs and bushings are not identified by class.  They may be used for ratings up through Class 6000.
• Dimension tolerances in accordance with ANSI/ASME B16.11 do no include laterals, reducers and unions.
• Swages can be ordered in any combination of end.
• Fittings with special dimensions, threads, or counterbores can be made by agreement between the manufacturer and purchaser.  If the fittings meet all of the requirements of this Standard, they can be considered in compliance, provided they are appropriately marked.

 

Swage Nipple

Swage nipple

 

 Threaded Fitting Datasheets

• See threaded fitting datasheets