Cosa sono i raccordi per tubi di uscita?

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)

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.

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)

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. 

300# Female Threaded Coupolet
Nominale Dimensioni dell'uscita	Dimensioni
	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)

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.

Nominale Dimensione del gomito Pollici	Dimensioni dell'uscita Pollici	Dimensioni
		CL 3000 filettato e Saldatura a bussola standard e saldatura testa a testa XS		CL 6000 filettato e Presa di corrente Saldata Sch. 160 e XXS Saldata a testa in giù
		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
Ordine specifico	**4	6 5/8	4 13/16
Dimensioni del gomito	**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)

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)

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.

Uscita Dimensioni	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
Peso standard del tubo di scarico	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
Tubo XS Run	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
Tubo da .500″ a .750″ di spessore	-	-	-	2.88	3.31	3.75	4.12	4.18	4.25	4.37	4.50	4.69	5.13	5.62	6.50
Tubo da .750″ a 1.00″ di spessore	-	-	-	3.22	3.38	3.75	4.34	4.62	4.84	5.10	5.25	5.88	6.50	6.75	7.62
Tubo da 1,00″ a 1,25″ di spessore	-	-	-	3.38	3.50	4.00	4.50	4.88	5.00	5.38	5.50	6.00	6.50	7.00	8.00
Tubo da 1,25″ a 1,50″ di spessore	-	-	-	3.62	3.87	4.25	4.69	5.16	5.31	5.68	5.81	6.44	6.50	7.56	8.72
Uscita Dimensioni	*’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
Peso standard del tubo di scarico	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
Tubo XS Run	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)

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.

7) Nipolet (Nipple Outlet)

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).

Plain end and Threaded
Dimensioni		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)

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?

Il 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.

9) Sweepolet (Swept Outlet)

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.

Run Size	Dimensioni dell'uscita Pollici	Dimensioni
		*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)

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

11) Weldolet (Welding Outlets)

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 fitting. Weldolet (Welding Outlet) is designed to minimize stress concentrations and provide integral reinforcement. manufactured to meet your specific reinforcement requirements.

Che cos'è un 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. 

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.

Materiale

• Acciaio al carbonio
• Acciaio inossidabile
• Altro

Specificare la pianificazione dell'esecuzione e della diramazione

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″ Peso standard x 6″ Il peso standard è specificato come un raccordo di peso standard da 6″.
Nel caso in cui la sagoma della tratta sia maggiore o minore della sagoma della diramazione, è essenziale specificare entrambe le sagome, poiché (a) le caratteristiche di rinforzo del Weldolet sono in funzione dello spessore della parete del tubo della tratta, che a sua volta determina la sagoma del raccordo Weldolet di base da utilizzare; (b) lo spessore della parete dell'uscita o dell'estremità della diramazione deve corrispondere allo spessore della parete del tubo della diramazione.

EXAMPLE:
16″ Extra forte x 6″ Peso standard
16″ Peso standard x 6″ Extra forte
Si suggerisce di prestare particolare attenzione a non confondere il programma 40 e il peso standard come se fossero identici (sopra i 10″ il programma 40 è più pesante) e il programma 80 e l'extra strong (sopra gli 8″ il programma 80 è più pesante).

Fonte: Cina Uscita Manufacturer - Yaang Pipe Industry Co., Limited (www.steeljrv.com)

(Yaang Pipe Industry è un produttore e fornitore leader di prodotti in lega di nichel e acciaio inossidabile, tra cui flange in acciaio inossidabile Super Duplex, flange in acciaio inossidabile, raccordi per tubi in acciaio inossidabile, tubi in acciaio inossidabile. I prodotti Yaang sono ampiamente utilizzati nei settori della costruzione navale, dell'energia nucleare, dell'ingegneria navale, del petrolio, della chimica, dell'industria mineraria, del trattamento delle acque reflue, del gas naturale, dei recipienti a pressione e in altri settori).

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Riferimenti:

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