What are Outlet Pipe Fittings?

What are Outlet Pipe Fittings?

Olet pipe fittings (otherwise called Branch Connection Fittings or Outlet fittings) will be fittings which give an outlet from a bigger pipe to a smaller one (or one of a similar size). The fundamental pipe onto which the branch association is welded is generally called the Run or Header size estimate. The pipe to which the branch association or connection gives a channel is normally called the Branch or Outlet size. Branch associations are in all sizes, sorts, bores, and classes, in an extensive variety of stainless steel, chrome-moly, and different amalgams alloys.

Different types of Olet or Outlet Pipe Fittings:

1) Brazolet (Brazo Outlet)
20171225074933 60516 - What are Outlet Pipe Fittings?

Brazolet is utilized generally abroad as of late, it is utilized to interface or connect the fortified fittings. It happens of conventional associating ways. The assortment of Brazolet is made in phenomenal Forgings. It’s intended for use with KLM and IPS metal or copper tubing. It’s accessible with socket or threaded connections.

20171225081900 72815 - What are Outlet Pipe Fittings?

Brazolet for IPS Pipe
ASME SB-98 UNS C665500 Alloy A
Outlet Sizes A B C Brazing Surface F-MIN. MIL-1183
1/4 11/16 1 9/16 0.188 0.700
3/8 13/16 1 1/4 3/4 0.190 0.855
1/2 1 1 7/16 7/8 0.220 1.020
3/4 1 1/16 1 3/4 1 1/8 0.240 1.250
1 1 1/4 2 1/8 1 7/16 0.270 1.535
1 1/4 1 5/16 2 9/16 1 3/4 0.300 1.900
1 1/2 1 3/8 2 7/8 2 0.330 2.160
2 1 1/2 3 1/2 2 9/16 0.360 2.675
2 1/2 1 13/16 4 1/8 3 0.384 3.215
3 2 4 13/16 3 11/16 0.442 3.880
4 2 1/4 6 4 3/4 0.476 4.940
5 2 5/8 7 1/16 5 9/16 0.656 6.163
 

Brazolet for Tubing
Type K, L, and M Tubing. ASME SB-98 UNS C65500 Alloy A
Outlet Sizes A B C Brazing Surface F-MIN. MIL-1183
1/4 11/16 1 9/16 0.188 0.700
3/8 13/16 1 1/4 3/4 0.190 0.855
1/2 13/16 1 1/4 3/4 0.190 0.855
3/4 1 1 7/16 7/8 0.220 1.020
1 1 1/16 1 3/4 1 1/8 0.240 1.250
1 1/4 1 1/4 2 1/8 1 7/16 0.270 1.535
1 1/2 1 5/16 2 9/16 1 3/4 0.300 1.900
2 1 3/8 2 7/8 2 0.330 2.160
2 1/2 1 1/2 3 1/2 2 9/16 0.360 2.675
3 1 13/16 4 1/8 3 0.384 3.215
4 2 1/8 5 1/2 4 5/16 0.437 4.400

2) Coupolet (Coupling Outlet)
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Coupolet pipe fittings are intended for use in flame/fire insurance sprinkler frameworks and other low weight pressure piping applications. Produced with NPT female threads for 300# administration and are UL Listed and F.M. affirmed. 

20171225082235 61606 - What are Outlet Pipe Fittings?

300# Female Threaded Coupolet
Nominal
Outlet Size
Dimensions
A C F
1/2 15/16 0.745 1.188
3/4 1 0.958 1.441
1 1 3/16 1.188 1.562
1 1/4 1 5/16 1.550 1.906
1 1/2 1 9/16 1.780 2.188
2 1 11/16 2.260 2.750
2 1/2 1 13/16 2.890 3.386
3 2 1/2 3.400 4.000
4 3 4.380 5.000
Interchangeability or Combination of Sizes
Coupolet Outlet
Size Inches
Run Sizes
1/2 1/2 3/4 1-1/4 -1 2-1/2 – 1-1/2 8-3 36-10          
3/4 3/4 1 2 – 1-1/4 6 – 2-1/2 36-8            
1 1 1-1/4 2 – 1-1/2 4 – 2-1/2 8-5 36-10          
1-1/4 1-1/4 1-1/2 2-1/2 – 2 4-3 8-5 36-10          
1-1/2 1-1/2 2 2-1/2 4-3 8-5 16-10 36-18        
2 2 2 1/2 3 3-1/2 4 5 6 8 10 16-12 36-18
2-1/2 2-1/2 3 3-1/2 4 5 6 8 12-10 16-14 36-18  
3 3 3-1/2 4 5 6 8 10 12 14 18-16 36-20
4 5 6 8 10 14-12 16 18 20 24 36  

3) Elbolet (Elbow Outlet)
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Elbolet is used on 90° Long Radius Elbows (can be manufactured for Short Radius Elbows) for thermowell and instrumentation connections. Available butt-weld to meet specific reinforcement requirements, and 3000# and 6000# classes for Socket Weld and threaded applications.
An Elbolet is used on 90° long radius elbows, short radius elbows and can be used on 180° returns. However, an Elbolet on a short radius elbow is not used often. It typically is used for Thermowell and instrumentation connections but can be used as a drain connection when room isn’t available for using a Weldolet. The Elbolet is available with buttweld, socketweld or threaded connections.
Outlet is used widely abroad in recent years, It is used to connect the reinforced fittings. It can replace the reducing tee, reinforce plate and reinforced pipe. It is used widely more and more in high pressure high temperature large diameter and thick wall pipe. As it is reliability, cheap, simple, good for flow, seriation, standardization and choose easily. It takes place of traditional connecting ways. The body of outlets is made in excellent Forgings. The material is same as pipe’s. We can make outlet from Carbon steel, Alloy steel and Stainless steel. branch or other fittings such as nipple thread plug, Instrument and valve by Butt Welding, Socket Welding and Threaded.

20171225082628 11832 - What are Outlet Pipe Fittings?

Nominal
Elbow Size
Inches
Outlet Size
Inches
Dimensions
CL 3000 Threaded &
Socket Weld Std. & XS Butt-Weld
CL 6000 Threaded &
Socket Socket-Weld Sch. 160 & XXS Butt-Weld
C E C E
36 – 3/4 1/4 1 1/2 1 19/32 1 1/2 1 19/32
36 – 3/4 3/8 1 1/2 1 19/32 1 1/2 1 19/32
36 – 3/4 1/2 1 1/2 1 19/32 1 23/32 1 7/8
36 – 1 3/4 1 23/32 1 7/8 2 1/4 2 1/4
36 – 2 1 2 1/4 2 1/4 2 7/8 2 1/2
36 – 2 1 1/4 2 7/8 2 1/2 3 1/8 2 11/16
36 – 2 1 1/2 3 1/8 2 11/16 4 3/16 3 1/4
36 – 3 2 4 3/16 3 1/4    
  **2 1/2 4 3/16 3 1/4    
  **3 5 1/16 3 7/8    
Order to Specific **4 6 5/8 4 13/16    
Elbow Sizes **6 9 3/8 6 1/2 ** **
  **8 13 5/16 8 1/16    
  **10 17 1/32 10 3/8    
  **12 19 5/8 11 1/8  


4) Flexolet (Flexo Outlet)
20171225075403 30733 - What are Outlet Pipe Fittings?

Flexolets are like weldolets with a minor distinction i.e. flexolet has straight bore while weldolet has decreased bore. We give flexolets butt weld, socket weld and threaded ends. Hence, you can pick any of them as per the piping applications.

What is the difference between weldolet and flexolet?


All Weldolets are Flexolets but not all Flexolets are Weldolets in the same way that all dogs are animals but not all animals are dogs.

The Flexolet and the Weldolet products are our two branch connection designs. They perform the same function, which is that they reinforce the strength lost when a hole is cut into the header pipe and they connect the header pipe to the branch pipe. The difference in designs is that the Weldolet has a tapered bore while the Flexolet has a straight-through bore. 

See below:

The tapered bore provides a better transition (reduces the flow resistance) and it also provides a lower stress intensification factor, which results in less stress on the welds and longer fatigue life. The straight-through bore decreases the diameter of the part and allows for larger run-size consolidations (meaning you can use them on a wider range of header pipe diameters). Because of the smaller size of the straight-through bore, the Flexolet tends to be less expensive as compared to the Weldolet.


5) Insert Weldolet (Insert Welding Outlet)
20171225075434 17715 - What are Outlet Pipe Fittings?

Insert Weldolet is the most widely recognized of all branch connections, and is welded onto the outlet pipe. The ends are slanted to encourage this procedure, and in this manner the weldolet is viewed as a butt-weld fitting. Weldolets are intended to limit stretch fixations and give essential fortification / reinforcement.

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Outlet
Size

A’ Dimensions (Height

 above run pipe)

1 1/2 2 2 1/2 3 4 5 6 8 10 12 14 16 18 20 24
Std Wt Run Pipe 1.50 1.50 1.62 1.75 2.00 2.25 2.38 2.75 3.06 3.38 3.50 3.75 3.81 4 4.56
XS Run Pipe 1.50 1.50 1.62 1.75 2.00 2.25 3.06 3.87 3.69 4.06 3.81 4.19 4.38 4.69 5.50
.500″ to .750″ Thick Run Pipe 2.88 3.31 3.75 4.12 4.18 4.25 4.37 4.50 4.69 5.13 5.62 6.50
.750″ to 1.00″ Thick Run Pipe 3.22 3.38 3.75 4.34 4.62 4.84 5.10 5.25 5.88 6.50 6.75 7.62
1.00″ to 1.25″ Thick Run Pipe 3.38 3.50 4.00 4.50 4.88 5.00 5.38 5.50 6.00 6.50 7.00 8.00
1.25″ to 1.50″ Thick Run Pipe 3.62 3.87 4.25 4.69 5.16 5.31 5.68 5.81 6.44 6.50 7.56 8.72
 
Outlet
Size

*’W’ Dimensions (Max. O.D. of fitting

 – Max. size of hole)

1 1/2 2 2 1/2 3 4 5 6 8 10 12 14 16 18 20 24
Std Wt Run Pipe 3.50 4.25 4.88 5.69 7.00 8.06 9.71 11.71 14.00 16.32 17.56 19.75 22.00 24.00 29.00
XS Run Pipe 3.56 4.38 5.00 5.75 7.12 8.25 10.44 13.44 14.25 16.56 18.00 20.00 22.44 25.00 30.32

6) Latrolet (Lateral Outlet)
20171225075511 80707 - What are Outlet Pipe Fittings?

Latrolets are a variety of weldolets. You have to connect it in same way, however these Latrolets make a 45-degree connection to the principle pipe instead of a 90 degree. These olets can be either butt welded, socket welded, or threaded.

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Nominal
Run Pipe
Size

Outlet

 Size

Dimensions

CL 3000 Threaded 

and Socket Weld

CL 6000 Threaded 

and Socket Weld

Standard & 

XS Butt Weld

Sch. 160 and 

XXS Butt Weld

A B C E A B C E A B C E A B C
2 1/2 – 1 1/4 1/4 1 9/16 2 11/32 1 7/16 1 9/16 1 9/16 2 11/32 1 7/16 1 9/16 1 5/16 2 3/32 1 7/16 1 9/16 1 9/16 2 5/16 1 7/16
12 – 3                                
2 1/2 – 1 1/4 3/8 1 9/16 2 11/32 1 7/16 1 9/16 1 9/16 2 11/32 1 7/16 1 9/16 1 5/16 2 3/32 1 7/16 1 9/16 1 9/16 2 5/16 1 7/16
12 – 3                                
2 1/2 – 1 1/4 1/2 1 9/16 2 11/32 1 7/16 1 9/16         1 3/8 2 5/32 1 7/16 1 9/16      
12 – 3                                
1 1/2 – 1 1/4                                
5 – 2 1/2         1 7/8 2 3/4 1 3/4 1 29/32         1 13/16 2 3/4 1 3/4
12 – 6                                
1 1/2 – 1 1/4                                
5 – 2 3/4 1 7/8 2 3/4 1 3/4 1 29/32         1 11/16 2 17/32 1 3/4 1 29/32      
12 – 6                                
2 1/2 – 2                                
5 – 3 3/4         2 3/16 3 1/4 2 1/8 2 3/16         2 1/8 3 1/4 2 1/8
12 – 6                                
2 1/2 – 2                                
5 – 3 1 2 3/16 3 1/4 2 1/8 2 3/16 2 1/2 3 21/32 2 5/8 2 15/32 1 31/32 3 2 1/8 2 3/16 2 1/2 3 13/16 2 5/8
12 – 6                                
2 1/2 – 2                                
5 – 3 1 1/4 2 1/2 3 27/32 2 5/8 2 15/16 2 3/4 4 7/32 3 1/32 2 5/8 2 9/32 3 19/32 2 5/8 2 15/32 2 3/4 4 1/4 3
12 – 6                                
2 1/2 – 2                                
5 – 3 1 1/2 2 3/4 4 7/32 3 1/32           2 15/32 3 31/32 3 1/32 2 5/8      
12 – 6                                
5 – 4                                
8 – 6 1 1/2         3 3/8 5 7/16 4 1/8 3 5/32         3 3/8 5 3/8 4 1/8
12 – 10                                
5 – 4                                
8 – 6 2 3 3/8 5 7/16 4 1/8 3 5/32 3 3/8 5 7/16 4 1/8 3 5/32 3 3/16 5 1/4 4 1/8 3 13/32      
12 – 10                                
5 – 4                                
8 – 6 2 1/2                 3 5/32 5 3/16 4 1/8 3 5/32      
12 – 10                                
Order to
Specific Run
Pipe Sizes
                               
3                 3 13/16 6 1/4 4 31/32 3 25/32      
                               
Order to
Specific Run
Pipe Sizes
                               
4                 4 3/4 7 13/16 6 7/16 4 9/16      
                             

7) Nipolet (Nipple Outlet)
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Nipolets is only a blend of olets with nipples. These olets work like the weldolets or threadolets, yet are with nipple. They come either with a plain end or a threaded end. You can utilize either as indicated by the applications. Nipolets are broadly utilized for vents, taps, or depletes (drains).

20171225083542 51994 - What are Outlet Pipe Fittings?

Plain end and Threaded
Size 1/2 3/4 1 1 1/4 1 1/2 2
XS A 3 1/2 3 1/2 3 1/2 3 1/2 3 1/2 3 1/2
C 15/16 1 3/16 1 7/16 1 3/4 2 2 9/16
XXS A 3 1/2 3 1/2 3 1/2 3 1/2 3 1/2 3 1/2
C 9/16 3/4 1 1 5/16 1 1/2 1 11/16

8) Sockolet (Socket Weld Outlet)
20171225075655 63670 - What are Outlet Pipe Fittings?

A Sockolet is the same basic design as a “weldolet” or “threadolet” where the major difference is that a Sockolet has a socket for welding versus a buttweld connection that a Weldolet has. This makes a 90° branch and comes in full size or reducing for a straight piece of pipe. Sockolets are available in Class 3000, 6000 and 9000 for high pressures.


What is the difference between a weldolet and a sockolet?


The weldolet and the sockolet both have a run end and a branch end. The run end connects to the larger diameter pipe, and the branch end connects to the smaller diameter pipe. The connection to the run pipe is a fillet weld for both the weldolet and the sockolet. They differ, however, at the connection to the branch pipe. The weldolet has a bevelled end to butt weld to the branch pipe (which will also have a bevelled end), whereas the sockolet has a socket into which a plain end branch pipe is inserted, then fillet welded together.

Dimensions Reducing Sockolets – MSS SP97
20171225083736 35633 - What are Outlet Pipe Fittings?

CLASS 3000

NPS A B C D E
1/2 1
25.40
1.13/32
35.71
29/32
23.01
0.622
15.80
9/16
14.28
3/4 1.1/16
26.98
1.23/32
43.65
1.5/32
29.36
0.824
20.93
9/16
14.28
1 1.5/16
33.33
2
50.8
1.7/16
36.51
1.049
26.64
25/32
19.84
1.5/16
33.33
2.9/16
65.08
1.3/4
44.45
1.380
35.05
3/4
19.05
1.3/8
34.92
2.27/32
72.23
2
50.8
1.610
40.89
3/4
19.05
2
38.1
3.15/32
88.10
2.9/16
65.08
2.067
52.50
13/16
20.63
1.9/16
39.68
4.1/16
103.18
3
76.2
2.469
62.71
3/4
19.05
3 1.3/4
44.45
4.13/16
122.23
3.11/16
93.66
3.068
77.93
15/16
23.81
1.11/16
42.86
5.3/8
136.52
4.7/16
112.71
3.548
90.12
11/16
17.46
4 1.7/8
47.62
5.31/32
151.60
4.3/4
120.65
4.026
102.26
1.1/16
26.98
5 2.5/8
66.67
7.5/16
185.73
5.9/16
141.28
5.047
128.19
1.11/32
34.13
6 2.3/4
69.85
8.5/8
219.07
6.11/16
169.86
6.065
154.05
1.13/32
35.71
X = Min. 1/16 (1.6 mm)

CLASS 6000

NPS A B C D E
1/2
31.75
1.23/32
43.65
3/4
19.05
0.466
11.84
7/8
22.22
3/4 1.7/16
36.51
1.61/64
49.60
1
25.4
0.614
15.60
7/8
22.22
1 1.9/16
39.68
2.7/16
61.91
1.5/16
33.33
0.815
20.70
15/16
23.81
1.5/8
41.27
2.23/32
69.05

38.1
1.160
29.46
13/16
20.63
1.11/16
42.86

82.55
1.15/16
49.21
1.338
33.99
7/8
22.22
2 2.1/16
52.38
4.1/32
102.39
2.3/4
69.85
1.689
42.90
1.3/16
30.16
X = Min. 1/16 (1.6 mm)
General notes:
  • Dimensions: Top Row in Inches / Bottom Row in millimeters.
  • Bottoming Clearance – X – The purpose for the bottoming clearance in a Socket Weld is usually to reduce the residual stress at the root of the weld that could occur during solidification of the weld metal, and to allow for differential expansion of the mating elements.
  • Socket dimensions are in accordance with ASME B16.11. Design per MSS SP-97.
  • Source comes from Bonney Forge (except the sizes in millimeters).
  • Sockolet® is a registered name. Another often used name is Socket Weld Outlet.

9) Sweepolet (Swept Outlet)
20171225075818 88733 - What are Outlet Pipe Fittings?

Sweepolet is a shaped, essentially fortified; butt-weld branch association with a low stress escalation factor for low burdens and long exhaustion life. The connection weld is effectively inspected by radiography, ultrasound and other standard non-damaging methods. It’s produced to meet your particular support prerequisites. It reduces the stress concentration factors and pipe stresses.

20171225084008 71211 - What are Outlet Pipe Fittings?

Run Size Outlet Size
Inches
Dimensions
*A B
6 to 36 1 1/4 1 1/4 4
6 to 36 1 1/2 1 3/4 5 1/2
6 to 36 2 1 1/2 5 1/2
6 to 36 3 1 21/32 7
6 to 36 4 2 1/32 8 3/4
10 to 36 6 2 11/16 13
12 to 36 8 3 15
16 to 36 10 3 1/8 18 1/2
16 to 36 12 3 5/16 20 1/2
20 to 36 14 3 5/8 24
24 to 36 16 3 3/4 28
24 to 36 18 4 5/8 31
24 to 36 20 5 1/8 33
30 to 36 24 5 5/8 38


Weldolet Vs Sweepolet

Weldolets (aka WOL) are cheaper in terms of purchasing cost than sweepolets (aka SOL).

WOLs may, in some situations (large dia, thin wall) warp the pipe, i.e. unstraight and oval, due to excessive heat input arising form the relative thick required weld metal layer.

Since for WOLs the weld metal thickness is always greater than for SOLs (where one only welds the base metal wall thickness), welding may require some extra time to allow cooling off on the heat input to prevent banana-warping the pipe.

SOLs are less standard, I think most of the time custom made. Without having specific experience with SOLs, preparing and beveling the pipe for it may be more difficult/time-costuming compared to WOLs. For WOLs, you can weld them on, and then bore through the hole. This gives a smooth weld profile on the inside. This may give the best option for a flushing branch, as there is not weld metal ‘sticking into the run’ (provided the pipe doesnt become oval, as this will cause the pig trap to become stuck perhaps).

Since the saddle form is quite specific (but then again, the SOL may be laid down on the pipe, and the contour can be drawn), and a lot bigger than WOLs, more material has to be removed. 

If you use a SOL and the run pipe is large enough in dia, you may counter grind the root weld to become flush.

WOLs can be RT-ed, SOLs can.

WOLs are likely to give more peak stress than SOLs, since the latter has a much more continuous profile into the branch.

10) Threadolet (Threaded Outlet)
20171225080236 82165 - What are Outlet Pipe Fittings?

A threadolet is the same basic design as a “weldolet.” However the main difference is the fitting has a female threaded connection to mate to the branch connection. This makes a 90° branch and comes in full size or reducing for a straight piece of pipe. It typically is in the size range of 1/2″ to 2″ and is welded over a hole either drilled or burned in the pipe. 

You use a “weldolet” when you want to weld a pipe or fitting directly to the branch fitting and a “threadolet” when you want to screw the connecting pipe or fitting (e.g. valve) to the branch connection.

 

I believe there is a ANSI standard for the dimensions and pressure rating of these type of fitting. 

Depending of the relative size of the olet and the main pipe run the affect can vary from no affect to causing the header to bow or warp due to the heating and cooling of the weld. A good run of thumb is to never use an olet that is larger that 1/2 the size of the main pipe run. Size in this case being the nominal size.

Dimensions Reducing Thredolet – MSS SP97

20171225084236 36797 - What are Outlet Pipe Fittings?

CLASS 3000

NPS A B C
1/2 1
25.40
1.13/32
35.71
15/16
23.81
3/4 1.1/16
26.98
1.23/32
43.65
1.5/32
29.36
1 1.5/16
33.33
2
50.80
1.7/16
36.51
1.5/16
33.33
2.9/16
65.08
1.3/4
44.45
1.3/8
34.92
2.27/32
72.23
2
50.80
2
38.10
3.15/32
88.10
2.9/16
65.08
1.13/16
46.03
4.1/16
103.18
3
76.20
3 2
50.80
4.13/16
122.23
3.11/16
93.66
2.1/8
53.975
5.7/32
132.55
4
101.6
4
57.15
5.31/32
151.60
4.3/4
120.65
5 2.5/8
66.67
7.5/16
185.73
5.9/16
141.28
6 2.3/4
69.85
8.5/8
219.07
6.11/16
169.86
NPS A B C

CLASS 6000

NPS A B C
1/2
31.75
1.23/32
43.65
3/4
19.05
3/4 1.7/16
36.51
1.61/64
49.60
1
25.40
1 1.9/16
39.68
2.7/16
61.91
1.5/16
33.33
1.5/8
41.27
2.23/32
69.05

38.10
1.11/16
42.86

82.55
1.15/16
49.21
2 2.1/16
52.38
4.1/32
102.39
2.3/4
69.85
NPS A B C
General notes:
  • Dimensions: Top Row in Inches / Bottom Row in millimeters.
  • Root Gap – X – “Space” for welding the O’let is raised off the run pipe to establish proper weld gap by placing spacers, e.g. welding rods, under the fitting. This provides a uniform welding gap between the curvature of the run and base of fitting.
  • Threaded Ends are in accordance with ASME B1.20.1. Design per MSS SP-97.
  • Source comes from Bonney Forge (except the sizes in millimeters).
  • Thredolet is a registered name. Another often used name is Threaded Outlet.

11) Weldolet (Welding Outlets)
20171225080312 37087 - What are Outlet Pipe Fittings?

Weldolet (Welding Outlet) is the most common of all branch connections, and is welded onto the outlet pipe. The ends are bevelled to facilitate this process, and therefore the weldolet is considered a butt-weld fittingWeldolet (Welding Outlet) is designed to minimize stress concentrations and provide integral reinforcement. manufactured to meet your specific reinforcement requirements.


What is a weldolet (Welding Outlet)?

A Weldolet is commonly known on drawings as a WOL and makes a 90° branch connection. It comes in full size or reducing for a straight piece of pipe. A weldolet is designated by the run length by the branch length. For example a 6-inch weldolet on a 19-inch pipe would be a 19×6 Weldolet. 

Dimensions Weldolet Size on Size -STD- MSS SP97
20171225084453 45446 - What are Outlet Pipe Fittings?

DIMENSIONS NPS 1/2 TO 24

NPS A B C D
1/2 3/4
19.05
1.3/8
34.93
15/16
23.81
5/8
15.88
3/4 7/8
22.23
1.5/8
41.28
1.3/16
30.16
13/16
20.64
1 1.1/16
26.99
2
50.80
1.7/16
36.51
1.1/32
26.19

31.75
2.3/8
60.3
1.3/4
44.45
1.3/8
34.93
1.5/16
33.34
2.7/8
73
2
50.80
1.5/8
41.28
2
38.10

88.90
2.9/16
65.09
2.1/16
52.39
1.5/8
41.28
4.1/16
103.19
3
76.20
2.7/16
61.91
3 1.3/4
44.45
4.13/16
122.24
3.11/16
93.66
3.1/16
77.79
2
50.80
5.3/8
136.53
3.7/8
98.43
3.9/16
90.49
4 2
50.80
6
152.40
4.3/4
120.65
4
101.60
5
57.15
7.1/8
180.98
5.9/16
141.29
5.1/16
128.59
6 2.3/8
60.3

215.90
6.11/16
169.86
6.1/16
153.99
8 2.3/4
69.85
10.3/8
263.53
8.11/16
220.66
7.15/16
201.61
10 3.1/16
77.79
12.9/16
319.09
10.13/16
274.64
10
254.00
12 3.3/8
85.73
14.7/8
377.83
12.13/16
325.44
12
304.80
14
88.90
16.1/8
409.58
14.1/16
357.19
13¼
336.55
16 3.11/16
93.66
18¼
463.55
16.1/16
407.99
15¼
387.35
18 4.1/16
103.19
20.3/4
527.05
18.5/8
473.08
17¼
438.15
20 4.5/8
117.48
23.1/16
585.79
20.1/16
509.59
19¼
488.95
24 5.3/8
136.53
27.7/8
708.03
25.1/8
638.18
23¼
590.55
NPS A B C D
General notes:
  • Dimensions: Top Row in Inches / Bottom Row in millimeters.
  • Root Gap – X – “Space” for welding the O’let is raised off the run pipe to establish proper
    weld gap by placing spacers, e.g. welding rods, under the fitting. This provides a uniform
    welding gap between the curvature of the run and base of fitting.
  • L = Dimensions Center Line of Run Pipe + X (Root Gap) + A (height of Weldolet).
  • Bevelled Ends ASME B16.9 and B16.25.
  • Source comes from Bonney Forge (except the sizes in millimeters).
  • Weldolet is a registered name. Another often used name is Welding Outlet.

Outlet Pipe Fittings Classes as per this standadrd are : 

  1. Standard : Buttwelding : 1/8″ to 24″, for connecting STD thk Pipe.
  2. Extra Strong : Buttwelding : 1/8″ to 24″ for connecting Extra Strong Pipe
  3. Schedule 160 : Buttwelding : 1/2″ to 6″ : for connecting Schedule 160 Pipe
  4. 3000 : Threaded and Socket Welding : 1/8″ to 4″ : for connecting Extra Strong Pipe
  5. 6000 : Threaded and Socket Welding : 1/2″ to 2″ : for connecting Sch 160 Pipe.

Material

  • Carbon steel
  • Stainless steel
  • Other

Specifying the Schedule of both the Run and Branch

Generally the schedules of the run pipe and branch pipe are identical and thus specification of the equivalent schedule Weldolet assures the proper fitting being used.

EXAMPLE:
16″ Standard weight x 6″ Standard weight is specified as a 6″ standard weight fitting.
Where the schedule of the run is greater or less than the schedule of the branch, it is essential that both schedules be specified since (a) The Weldolet’s reinforcing characteristics are a function of the run pipe wall thickness, which in turn designates the schedule of the basic Weldolet fitting to be used;(b) The wall thickness of the outlet or branch end must match the wall thickness of the branch pipe.

EXAMPLE:
16″ Extra strong x 6″ Standard weight
16″ Standard weight x 6″ Extra strong
Special care is suggested to avoid confusing schedule 40 and standard weight as being identical (above 10″ schedule 40 is heavier) and schedule 80 and extra strong (above 8″ schedule 80 is heavier).

Source: China Outlet Manufacturer – Yaang pipe fitting Industry Co., Limited (www.ugsteelmill.com)

(Yaang Pipe Industry is a leading manufacturer and supplier of nickel alloy and stainless steel products, including Super Duplex Stainless Steel Flanges, Stainless Steel Flanges, Stainless Steel Pipe Fittings, Stainless Steel Pipe. Yaang products are widely used in Shipbuilding, Nuclear power, Marine engineering, Petroleum, Chemical, Mining, Sewage treatment, Natural gas and Pressure vessels and other industries.)

If you want to have more information about the article or you want to share your opinion with us, contact us at sales@ugsteelmill.com

Please notice that you might be interested in the other technical articles we’ve published:

  • Tips for selecting expansion joints

  • What is the difference between a steel pipe and a steel tube?

  • Engineering Specification for Pressure Test of Piping System

  • How to choose a valve and valve end connection type

  • How to test pipe fitting?

  • Manufacturing process of cold rolled steel pipe

  • Development trend of high pressure pipe fittings

  • How to get high quality flanges

  • How to get high quality pipe fittings

  • How to get high quality bellow expansion joints

  • HOW TO GET HIGH QUALITY ALLOY STEEL PIPES


References:

  • http://www.wermac.org/fittings/olets_general.html
  • https://www.yaang.com

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