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

Branch Outlets 

  "Outlet" is a generic term for all branch type connections. They can come with threaded, socket-weld, and butt-weld end connections. The most common types are used in place of a tee. A hole is cut in the side of the pipe, the outlet is welded in place over the hole and then the additional length of pipe is attached to the outlet.
  Similar to reducing tees, outlets are usually described by two sizes. The Run or Header size refers to the pipe on which the outlet is mounted. The Outlet or Branch size refers to the length of pipe branching off of the run.
  This type of fitting is contoured to match the curve on the Header Pipe and beveled on the Branch side to mate up with a beveled piece of the branch pipe.
  In addition, various other types of outlets are available such as: 45 degree lateral outlets which branch out on a 45 degree angle, elbow outlets which sit on the radius of a 90 degree elbow and nipple outlets which combine a nipple length (usually 3 1/2" long) with an outlet.


Correlation of Fittings Class With Schedule Number or Wall Designation of Run for Calculation of Ratings

 

Class of Fitting

Type

Branch Size

Pipe Wall for Rating Basis

Standard

Buttwelding

NPS 1/8-24

Standard

Extra Strong 

Buttwelding

NPS 1/8-24

Extra Strong 

Sch160

Buttwelding

NPS 1/2-6

Sch160

CL3000

Threaded & Socket welding

NPS 1/8-4

Extra Strong 

CL6000

Threaded & Socket welding

NPS 1/2-2

Sch160

 

Butt Welding Outlet
Nominal Pipe Size 
of Run Pipe
Nominal Pipe Size 
of Outlet Pipe
Face of Fitting to Crotch Outside Diameter of Fitting
DN NPS DN NPS A D1 min
STD  XS SCH160 STD XS SCH160
8-900 1/4-36 6 1/8 16 16 - 24 24 -
10-900 3/8-36 8 1/4 16 16 - 26 26 -
15-900 1/2-36 10 3/8 19 19 - 30 30 -
20-900 3/4-36 15 1/2 19 19 28 36 36 36
25-900 1-36 20 3/4 22 22 32 43 43 46
32-900 1 1/4-36 25 1 27 27 38 55 55 51
40-900 1 1/2-36 32 1 1/4 32 32 44 66 66 63
50-900 2-36 40 1 1/2 33 33 51 74 74 71
65-900 2 1/2-36 50 2 38 38 55 90 90 82
80-900 3-36 65 2 1/2 41 41 62 104 104 98
90-900 3 1/2-36 80 3 44 44 73 124 124 122
100-900 4-36 90 3 1/2 48 48   138 138 -
125-900 5-36 100 4 51 51 84 154 154 154
150-900 6-36 125 5 57 57 94 187 187 188
200-900 8-36 150 6 60 78 105 213 227 222
250-900 10-36 200 8 70 99 - 265 292 -
300-900 12-36 250 10 78 94 - 323 325 -
350-900 14-36 300 12 86 103 - 379 381 -
400-900 16-36 350 14 89 100 - 411 415 -
450-900 18-36 400 16 94 106 - 465 468 -
500-900 20-36 450 18 97 111 - 522 525 -
550-900 22-36 500 20 102 119 - 573 584 -
650-900 26-36 600 24 116 140 - 690 708 -
Socket welding Outlet
Nominal Pipe Size
 of Run Pipe
Nominal Pipe Size 
of Outlet Pipe
Face of Fitting
 to Crotch
Outside Diameter 
of Fitting
Outside Diameter
 at End of Fitting
DN NPS DN NPS A D1 min D2 min
3000 6000 3000 6000 3000 6000
8-900 1/4-36 6 1/8 20 - 27 - 22 -
10-900 3/8-36 8 1/4 20 - 27 - 22 -
15-900 1/2-36 10 3/8 23 - 30 - 26 -
20-900 3/4-36 15 1/2 26 34 36 47 33 42
25-900 1-36 20 3/4 29 38 43 53 39 48
32-900 1 1/4-36 25 1 35 42 55 63 48 58
40-900 1 1/2-36 32 1 1/4 35 43 66 74 58 67
50-900 2-36 40 1 1/2 37 45 75 83 64 77
65-900 2 1/2-36 50 2 40 53 90 104 77 93
80-900 3-36 65 2 1/2 41 - 105 - 94 -
90-900 3 1/2-36 80 3 46 - 124 - 114 -
125-900 5-36 100 4 49 - 154 - 140 -
Threaded Outlet
Nominal Pipe Size
 of Run Pipe
Nominal Pipe Size
of Outlet Pipe
Face of Fitting
 to Crotch
Outside Diameter
of Fitting
Outside Diameter
at End of Fitting
DN NPS DN NPS A D1 min D2 min
3000 6000 3000 6000 3000 6000
8-900 1/4-36 6 1/8 19 - 27 - 22 -
10-900 3/8-36 8 1/4 19 - 27 - 22 -
15-900 1/2-36 10 3/8 21 - 30 - 25 -
20-900 3/4-36 15 1/2 25 32 38 45 33 42
25-900 1-36 20 3/4 27 37 47 52 39 48
32-900 1 1/4-36 25 1 33 40 56 63 48 58
40-900 1 1/2-36 32 1 1/4 33 41 66 72 58 67
50-900 2-36 40 1 1/2 35 43 75 83 64 77
65-900 2 1/2-36 50 2 38 52 90 104 77 93
80-900 3-36 65 2 1/2 46 - 105 - 94 -
90-900 3 1/2-36 80 3 51 - 124 - 114 -
125-900 5-36 100 4 57 - 154 - 140 -

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