Pipe tees feature three openings: two in line with and opposite each other and the third at 90 degrees. This arrangement makes tees useful for splitting a fluid stream into two or combining two streams into one, and reducing tees enable connecting different fittings and sprinklers.
Pipe tees feature three openings: two in line with and opposite each other and the third at 90 degrees. This arrangement makes tees useful for splitting a fluid stream into two or combining two streams into one, and reducing tees enable connecting different fittings and sprinklers.
In fire sprinkler systems, tees might join fire department connections, drains, and test headers to risers, connect cross mains to risers and branch lines to cross mains, or attach fire sprinklers to branch lines.
But how do you get the right-sized tee if it's got different-sized holes? To confuse things, some tees have multiple connection types'like grooved and threaded'on the same part.
Picking the proper tee can be confusing if you don't know the sizing format. This article explains:
QRFS is your connection for CPVC fittings and grooved fittings'including straight tees, reducing tees, elbows, reducers, couplings, and more. Check out our catalog today!
First, let's explain the sizes of two different types of tees: standard tees (which come in straight and reducing varieties) and mechanical tees for grooved pipe. It bears mentioning that any time we talk about pipe sizes here, we're using nominal size, not actual size.
A straight tee (also called an equal tee) is so named because all three of its openings are the same size. You'll see straight tee sizes given with just one dimension, though you might also see '[equal measurement] by [equal measurement] by [equal measurement].' For example, a 6-inch straight tee (aka 6 inches x 6 inches x 6 inches) looks like this:
A reducing tee has outlets of different sizes. To make it clear which outlet is which size, manufacturers write their tee dimensions in the format A x B x C; each letter stands for the nominal size of a tee opening.
There are three general types of reducing tees:
1. In the first type, A and B are the same size, and C is smaller. Since A and B are equal, this format is easy to understand. An example dimension is 6 in. x 6 in. x 2 in.
2. In another type, B and C are the same size, and A is larger. To understand this scheme, remember that the last measurement, C, is always at a right angle to the other two sides.
Functionally, it doesn't matter which of the two in-line openings is A or B'you can always flip the tee around. Usually, the bigger one is A. For example, a 1 in. x 3/4 in. x 3/4 in. tee would look like this:
3. Finally, all openings of the tee could be different sizes. Again, you can easily get the right part by remembering that the last measurement, C, is the right-angle outlet, and A and B are interchangeable because tees can be flipped.
As before, usually, the larger of the two comes first. Here's what a 1-1/4 in. x 1 in. x 1/2 in. reducing tee looks like:
In this example, you'll see that one of the outlets has a different joint type than the others'it's threaded instead of a CPVC slip joint. This is called an adapter'more on that later!
Grooved pipe doesn't always use 'normal' tees. Instead, grooved piping systems allow for something called a mechanical tee.
Mechanical tees involve cutting a hole into a pipe and clamping on joints around the pipe's circumference. You can read all about mechanical tees in our previous blog.
Unlike other tees, mechanical tees only have two dimensions: the size of the pipe (and clamp and gasket surrounding it) and the size of the outlet. A 4 in. x 2 in. mechanical tee fits onto a 4-inch pipe and has a 2-inch perpendicular outlet. Check out this picture for clarification:
Depending on the type of pipe used, PVC slip joints or grooved joints are commonly used in fire protection to join pipes. But fire sprinkler heads almost universally require a threaded fitting to attach to pipes. That's where tees with multiple size-and-connection combinations'adapter tees'come in handy.
Just like with tee size, adapter tee joint types are given in the A x B x C format. But instead of only describing size, each letter also represents the joint type.
As before, A and B are the two openings that are in line with one another. C, the perpendicular opening, usually has the different connection type. For example, tees that join fire sprinklers to 1-inch branch lines might be 1 in. x 1 in. x ½ in. with ends marked slip x slip x FNPT (meaning female NPT threaded).
This picture should make everything clear:
For grooved pipe, some mechanical tees are also adapters used to switch connection types. Again, in fire protection, this is often used to attach threaded fire sprinklers to branch lines. Understanding the outlet type is easy. By default, mechanical tees have grooved outlets. If the manufacturer calls it a 'threaded mechanical tee,' the outlet is threaded.
Tees are important parts of any plumbing or fire protection system. But with three different openings, finding the right-sized part with the correct connection can be slightly confusing'unless you know the proper notation.
Fortunately, it's as easy as A x B x C. The outlet at a right angle to the other two'what we've called C'is always last in the sequence. A and B, in line with one another, are functionally interchangeable because tees can be flipped.
Need tees? QRFS has you covered. Check out our fire-protection-approved CPVC tees and other CPVC pipe and fittings, plus iron grooved tees and other grooved fittings.
If you can't find what you need on our website, contact us at 888.361. or .
This blog was originally posted at blog.qrfs.com. If this article helped you, check us out at Facebook.com/QuickResponseFireSupply or on Twitter @QuickResponseFS.
What is the difference between a mechanical tee and a grooved tee? This is a question that many laypeople often ask. The same is a tee fitting. The mechanical tee and the grooved tee are actually quite different. First, look at the following two pictures:
Grooved Tee
Grooved Mechanical Tee
Judging from the pictures, the two grooved products are very different. The grooved mechanical tee has two more threads and nuts and rubber rings than the grooved tee. Below I will describe their specific uses separately.
1. Grooved Tee
' effect:
A tee has three openings, one inlet, and two outlets, or two inlets and one outlet. A tee is a pipe fitting applied to a pipeline system, with T-shaped and Y-shaped, with equal-diameter nozzles and different-diameter nozzles, used for the convergence of three identical or different pipelines. The main function of the tee is to change the direction of the fluid.
' Install:
Grooved tees should be installed in grooved piping systems. All three outlets of the grooved tee should be connected to the pipe by rigid or flexible couplings. See below:
Rigid couplings
Regarding the similarities and differences between rigid clamps and flexible clamps, you can click the link below for a more detailed introduction to the article:
https://www.malleableiron-pipefitting.com/industry-knowledge/rigid-coupling-vs-flexible-coupling.html
2. Grooved mechanical tee
' Reasons to use a grooved mechanical tee'
To lead out a branch pipe with a different diameter, a mechanical tee is used in the construction process. A groove connection and a threaded connection are two types of connections. This type of connection is usually made for several reasons:
' Branch pipe must be installed somewhere on the main pipe.
Reducing tee can be used to lead a branch pipe out of an existing pipe of a fixed length (usually 6 meters), but the main pipe needs to be cut off.
' For the purpose of saving money.
The cost of a tee is greater than that of a mechanical tee. Under normal circumstances, mechanical tees are used when the diameter of the main pipe is 33, and U-shaped mechanical tees are usually used between 33 and 60. There are two ways to connect U-shaped mechanical tees: grooves or screws; they usually use 60 to 219 calibers, and they have an outer diameter of 21 to 33 inches (roughly 1/2" to 1"). The demand is not much different.
' Threaded mechanical tee
The threaded mechanical tee is a very special kind of grooved pipe fittings. It is similar to the grooved mechanical tee and is also widely used in grooved piping systems, but the branch pipe connection port of the threaded mechanical tee is connected by threads. The picture below shows the threaded mechanical tee.
Threaded mechanical tee
3. Standard Specifications for Grooved Tees, Grooved Mechanical Tees, and Grooved Threaded Tees
Grooved Mechanical Tees
Pipe O.D'D × d)
Working Pressure
Dimensions
Bolt/Nut Size
mm/in
mm/in
PSI/Mpa
K (mm/in)
W (mm/in)
L (mm/in)
H'mm/in'
No. - Size (mm)
100 × 25
114.3 × 33.7
300PSI
2.07MPa
363PSI
2.5MPa
102
71
180
80
M12×70
4 × 1
4.500 × 1.315
4.02
2.80
7.09
3.15
100 × 32
114.3 × 42.4
102
71
180
92
M12×70
4 × 1¼
4.500 × 1.660
4.02
2.80
7.09
3.62
100 × 40
114.3 × 48.3
102
71
180
92
M12×70
4 × 1½
4.500 × 1.900
4.02
2.80
7.09
3.62
100 × 50
114.3 × 60.3
102
71
180
107
M12×70
4 × 2
4.500 × 2.375
4.02
2.80
7.09
4.21
100 × 65
114.3 × 76.1
102
71
180
114
M12×70
4 × 2½
4.500 × 3.000
4.02
2.80
7.09
4.49
100 × 80
114.3 × 88.9
102
71
180
134
M12×70
4 × 3
4.500 × 3.500
4.02
2.80
7.09
5.28
125 × 65
139.7 × 76.1
115
84
217
114
M16×85
5 × 2½
5.500 × 3.000
4.53
3.31
8.54
4.49
125 × 80
139.7 × 88.9
115
84
217
134
M16×85
5 × 3
5.500 × 3.500
4.53
3.31
8.54
5.28
150 × 65
159.0 × 76.1
125
93
239
114
M16×95
6 × 2½
6.250 × 3.000
4.92
3.66
9.41
4.49
150 × 80
159.0 × 88.9
125
93
239
134
M16×95
6 × 3
6.250 × 3.500
4.92
3.66
9.41
5.28
150 × 100
159.0 × 108.0
130
93
239
162
M16×95
6 × 4
6.250 × 4.250
5.12
3.66
9.41
6.38
150 × 50
165.1 × 60.3
128
97
244
107
M16×95
6 × 2
6.500 × 2.375
5.04
3.82
9.61
4.21
150 × 65
165.1 × 76.1
128
97
244
114
M16×95
6 × 2½
6.500 × 3.000
5.04
3.82
9.61
4.49
150 × 80
165.1 × 88.9
128
97
244
134
M16×95
6 × 3
6.500 × 3.500
5.04
3.82
9.61
5.28
150 × 100
165.1 × 114.3
133
97
244
162
M16×95
6 × 4
6.500 × 4.500
5.24
3.82
9.61
6.38
200 × 50
219.1 × 60.3
156
126
307
107
M16×100
8 × 2
8.625 × 2.375
6.14
4.96
12.09
4.21
200 × 65
219.1 × 76.1
156
126
307
114
M16×100
8 × 2½
8.625 × 3.000
6.14
4.96
12.09
4.49
200 × 80
219.1 × 88.9
156
126
307
134
M16×100
8 × 3
8.625 × 3.500
6.14
4.96
12.09
5.28
200 × 100
219.1 × 114.3
158
126
307
162
M16×100
8 × 4
8.625 × 4.500
6.22
4.96
12.09
6.38
250 × 100
273.0× 114.3
187
152
384
162
M20×110
10 × 4
10.750 × 4.500
7.36
5.98
15.12
6.38
Grooved Threaded Tees
0
Pipe O.D'D × Rc)
Working Pressure
Dimensions
Bolt/Nut Size
mm/in
mm/in
PSI/Mpa
K (mm/in)
W (mm/in)
L (mm/in)
H 'mm/in'
No. - Size (mm)
65 × 25
76.1 × 33.7
300PSI
2.07MPa
363PSI
2.5MPa
68
51
136
80
M12×65
2½ × 1
3.000 × 1.315
2.68
2.01
5.35
3.15
65 × 32
76.1 × 42.4
70
51
136
92
M12×65
2½ × 1¼
3.000 × 1.660
2.76
2.01
5.35
3.62
65 × 40
76.1 × 48.3
70
51
136
92
M12×65
2½ × 1½
3.000 × 1.900
2.76
2.01
5.35
3.62
80 × 25
88.9 × 33.7
75
58
149
80
M12×65
3 × 1
3.500 × 1.315
2.95
2.28
5.87
3.15
80 × 32
88.9 × 42.4
78
58
149
92
M12×65
3 × 1¼
3.500 × 1.660
3.07
2.28
5.87
3.62
80 × 40
88.9 × 48.3
78
58
149
92
M12×65
3 × 1½
3.500 × 1.900
3.07
2.28
5.87
3.62
80 × 50
88.9 × 60.3
82
58
149
107
M12×65
3 × 2
3.500 × 2.375
3.23
2.28
5.87
4.21
100 × 25
108.0 × 33.7
87.5
68
174
80
M12×70
4 × 1
4.250 × 1.315
3.44
2.68
6.85
3.15
100 × 32
108.0 × 42.4
90
68
174
92
M12×70
4 × 1¼
4.250 × 1.660
3.54
2.68
6.85
3.62
100 × 40
108.0 × 48.3
90
68
174
92
M12×70
4 × 1½
4.250 × 1.900
3.54
2.68
6.85
3.62
100 × 50
108.0 × 60.3
94
68
174
107
M12×70
4 × 2
4.250 × 2.375
3.70
2.68
6.85
4.21
100 × 65
108.0 × 76.1
100
68
174
114
M12×70
4 × 2½
4.250 × 3.000
3.94
2.68
6.85
4.49
100 × 25
114.3 × 33.7
90
71
180
80
M12×70
4 × 1
4.500 × 1.315
3.54
2.80
7.09
3.15
100 × 32
114.3 × 42.4
92
71
180
92
M12×70
4 × 1¼
4.500 × 1.660
3.62
2.80
7.09
3.62
100 × 40
114.3 × 48.3
92.5
71
180
92
M12×70
4 × 1½
4.500 × 1.900
3.64
2.80
7.09
3.62
100 × 50
114.3 × 60.3
96
71
180
107
M12×70
4 × 2
4.500 × 2.375
3.78
2.80
7.09
4.21
100 × 65
114.3 × 76.1
103
71
180
114
M12×70
4 × 2½
4.500 × 3.000
4.06
2.80
7.09
4.49
100 × 80
114.3 × 88.9
104
71
180
134
M12×70
4 × 3
4.500 × 3.500
4.09
2.80
7.09
5.28
125 × 65
133.0 × 76.1
112
80
210
114
M16×85
5 × 2½
5.250 × 3.000
4.41
3.15
8.27
4.49
125 × 80
133.0 × 88.9
113
80
210
134
M16×85
5 × 3
5.250 × 3.500
4.45
3.15
8.27
5.28
125 × 25
139.7 × 33.7
103
84
217
80
M16×85
5 × 1
5.500 × 1.315
4.06
3.31
8.54
3.15
125 × 32
139.7 × 42.4
105
84
217
92
M16×85
5 × 1¼
5.500 × 1.660
4.13
3.31
8.54
3.62
125 × 40
139.7 × 48.3
105
84
217
92
M16×85
5 × 1½
5.500 × 1.900
4.13
3.31
8.54
3.62
125 × 50
139.7 × 60.3
109
84
217
107
M16×85
5 × 2
5.500 × 2.375
4.29
3.31
8.54
4.21
125 × 65
139.7 × 76.1
116
84
217
114
M16×85
5 × 2½
5.500 × 3.000
4.57
3.31
8.54
4.49
125 × 80
139.7 × 88.9
117
84
217
134
M16×85
5 × 3
5.500 × 3.500
4.61
3.31
8.54
5.28
150 × 25
159.0 × 33.7
114
93
239
80
M16×95
6 × 1
6.250 × 1.315
4.49
3.66
9.41
3.15
150 × 32
159.0 × 42.4
116
93
239
92
M16×95
6 × 1¼
6.250 × 1.660
4.57
3.66
9.41
3.62
150 × 40
159.0 × 48.3
116
93
239
92
M16×95
6 × 1½
6.250 × 1.900
4.57
3.66
9.41
3.62
150 × 50
159.0 × 60.3
119
93
239
107
M16×95
6 × 2
6.250 × 2.375
4.69
3.66
9.41
4.21
150 × 65
159.0 × 76.1
124
93
239
114
M16×95
6 × 2½
6.250 × 3.000
4.88
3.66
9.41
4.49
150 × 80
159.0 × 88.9
125
93
239
134
M16×95
6 × 3
6.250 × 3.500
4.92
3.66
9.41
5.28
150 × 25
165.1 × 33.7
117
97
244
80
M16×95
6 × 1
6.500 × 1.315
4.61
3.82
9.61
3.15
150 × 32
165.1 × 42.4
118
97
244
92
M16×95
6 × 1¼
6.500 × 1.660
4.65
3.82
9.61
3.62
150 × 40
165.1 × 48.3
120
97
244
92
M16×95
6 × 1½
6.500 × 1.900
4.72
3.82
9.61
3.62
150 × 50
165.1 × 60.3
122
97
244
107
M16×95
6 × 2
6.500 × 2.375
4.80
3.82
9.61
4.21
150 × 65
165.1 × 76.1
127
97
244
114
M16×95
6 × 2½
6.500 × 3.000
5.00
3.82
9.61
4.49
150 × 80
165.1 × 88.9
128
97
244
134
M16×95
6 × 3
6.500 × 3.500
5.04
3.82
9.61
5.28
150 × 100
165.1 × 114.3
132
97
244
162
M16×95
6 × 4
6.500 × 4.500
5.20
3.82
9.61
6.38
200 × 25
219.1 × 33.7
143
126
307
80
M16×100
8 × 1
8.625 × 1.315
5.63
4.96
12.09
3.15
200 × 32
219.1 × 42.4
145
126
307
92
M16×100
8 × 1¼
8.625 × 1.660
5.71
4.96
12.09
3.62
200 × 40
219.1 × 48.3
145
126
307
92
M16×100
8 × 1½
8.625 × 1.900
5.71
4.96
12.09
3.62
200 × 50
219.1 × 60.3
149
126
307
107
M16×100
8 × 2
8.625 × 2.375
5.87
4.96
12.09
4.21
200 × 65
219.1 × 76.1
155
126
307
114
M16×100
8 × 2½
8.625 × 3.000
6.10
4.96
12.09
4.49
200 × 80
219.1 × 88.9
158
126
307
134
M16×100
8 × 3
8.625 × 3.500
6.22
4.96
12.09
5.28
250 × 25
273.0 × 33.7
175
152
384
80
M20×110
10 × 1
10.750 × 1.315
6.89
5.98
15.12
3.15
250 × 50
273.0 × 60.3
179
152
384
107
M20×110
10 × 2
10.750 × 2.375
7.05
5.98
15.12
4.21
Grooved Tees
Nominal Size
Pipe O.D
Working Pressure
Dimensions
mm/in
mm/in
PSI/Mpa
L (mm/in)
50
60.3
300PSI
2.07MPa
363PSI
2.5MPa
68.5
2
2.374
2.697
65
76.1
74
2½
2.996
2.913
80
88.9
84
3
3.500
3.307
100
108.0
100
4
4.252
3.937
100
114.3
100
4
4.500
3.937
125
133.0
122
5
5.236
4.803
125
139.7
122
5
5.500
4.803
150
159.0
138
6
6.260
5.433
150
165.1
138
6
6.500
5.433
200
219.1
171
8
8.626
6.732
250
273.0
212
10
10.748
8.346
300
323.9
242
12
12.752
9.528
250
273.0
225PSI
1.6MPa
363PSI
2.5MPa 225PSI
1.6MPa
212
10
10.748
8.346
300
323.9
242
12
12.752
9.528
If you are interested in grooved pipe fittings, please click the link below to enter the official website of Jianzhi Group to see more about grooved pipe fittings.
https://www.malleableiron-pipefitting.com/
In fire sprinkler systems, tees might join fire department connections, drains, and test headers to risers, connect cross mains to risers and branch lines to cross mains, or attach fire sprinklers to branch lines.
But how do you get the right-sized tee if it's got different-sized holes? To confuse things, some tees have multiple connection types'like grooved and threaded'on the same part.
Picking the proper tee can be confusing if you don't know the sizing format. This article explains:
QRFS is your connection for CPVC fittings and grooved fittings'including straight tees, reducing tees, elbows, reducers, couplings, and more. Check out our catalog today!
First, let's explain the sizes of two different types of tees: standard tees (which come in straight and reducing varieties) and mechanical tees for grooved pipe. It bears mentioning that any time we talk about pipe sizes here, we're using nominal size, not actual size.
A straight tee (also called an equal tee) is so named because all three of its openings are the same size. You'll see straight tee sizes given with just one dimension, though you might also see '[equal measurement] by [equal measurement] by [equal measurement].' For example, a 6-inch straight tee (aka 6 inches x 6 inches x 6 inches) looks like this:
A reducing tee has outlets of different sizes. To make it clear which outlet is which size, manufacturers write their tee dimensions in the format A x B x C; each letter stands for the nominal size of a tee opening.
There are three general types of reducing tees:
1. In the first type, A and B are the same size, and C is smaller. Since A and B are equal, this format is easy to understand. An example dimension is 6 in. x 6 in. x 2 in.
2. In another type, B and C are the same size, and A is larger. To understand this scheme, remember that the last measurement, C, is always at a right angle to the other two sides.
Functionally, it doesn't matter which of the two in-line openings is A or B'you can always flip the tee around. Usually, the bigger one is A. For example, a 1 in. x 3/4 in. x 3/4 in. tee would look like this:
3. Finally, all openings of the tee could be different sizes. Again, you can easily get the right part by remembering that the last measurement, C, is the right-angle outlet, and A and B are interchangeable because tees can be flipped.
As before, usually, the larger of the two comes first. Here's what a 1-1/4 in. x 1 in. x 1/2 in. reducing tee looks like:
In this example, you'll see that one of the outlets has a different joint type than the others'it's threaded instead of a CPVC slip joint. This is called an adapter'more on that later!
Grooved pipe doesn't always use 'normal' tees. Instead, grooved piping systems allow for something called a mechanical tee.
Mechanical tees involve cutting a hole into a pipe and clamping on joints around the pipe's circumference. You can read all about mechanical tees in our previous blog.
Unlike other tees, mechanical tees only have two dimensions: the size of the pipe (and clamp and gasket surrounding it) and the size of the outlet. A 4 in. x 2 in. mechanical tee fits onto a 4-inch pipe and has a 2-inch perpendicular outlet. Check out this picture for clarification:
Depending on the type of pipe used, PVC slip joints or grooved joints are commonly used in fire protection to join pipes. But fire sprinkler heads almost universally require a threaded fitting to attach to pipes. That's where tees with multiple size-and-connection combinations'adapter tees'come in handy.
Just like with tee size, adapter tee joint types are given in the A x B x C format. But instead of only describing size, each letter also represents the joint type.
As before, A and B are the two openings that are in line with one another. C, the perpendicular opening, usually has the different connection type. For example, tees that join fire sprinklers to 1-inch branch lines might be 1 in. x 1 in. x ½ in. with ends marked slip x slip x FNPT (meaning female NPT threaded).
This picture should make everything clear:
For grooved pipe, some mechanical tees are also adapters used to switch connection types. Again, in fire protection, this is often used to attach threaded fire sprinklers to branch lines. Understanding the outlet type is easy. By default, mechanical tees have grooved outlets. If the manufacturer calls it a 'threaded mechanical tee,' the outlet is threaded.
Tees are important parts of any plumbing or fire protection system. But with three different openings, finding the right-sized part with the correct connection can be slightly confusing'unless you know the proper notation.
Fortunately, it's as easy as A x B x C. The outlet at a right angle to the other two'what we've called C'is always last in the sequence. A and B, in line with one another, are functionally interchangeable because tees can be flipped.
Need tees? QRFS has you covered. Check out our fire-protection-approved CPVC tees and other CPVC pipe and fittings, plus iron grooved tees and other grooved fittings.
If you can't find what you need on our website, contact us at 888.361. or .
This blog was originally posted at blog.qrfs.com. If this article helped you, check us out at Facebook.com/QuickResponseFireSupply or on Twitter @QuickResponseFS.
What is the difference between a mechanical tee and a grooved tee? This is a question that many laypeople often ask. The same is a tee fitting. The mechanical tee and the grooved tee are actually quite different. First, look at the following two pictures:
Grooved Tee
Grooved Mechanical Tee
Judging from the pictures, the two grooved products are very different. The grooved mechanical tee has two more threads and nuts and rubber rings than the grooved tee. Below I will describe their specific uses separately.
1. Grooved Tee
' effect:
A tee has three openings, one inlet, and two outlets, or two inlets and one outlet. A tee is a pipe fitting applied to a pipeline system, with T-shaped and Y-shaped, with equal-diameter nozzles and different-diameter nozzles, used for the convergence of three identical or different pipelines. The main function of the tee is to change the direction of the fluid.
' Install:
Grooved tees should be installed in grooved piping systems. All three outlets of the grooved tee should be connected to the pipe by rigid or flexible couplings. See below:
Rigid couplings
Regarding the similarities and differences between rigid clamps and flexible clamps, you can click the link below for a more detailed introduction to the article:
https://www.malleableiron-pipefitting.com/industry-knowledge/rigid-coupling-vs-flexible-coupling.html
2. Grooved mechanical tee
' Reasons to use a grooved mechanical tee'
To lead out a branch pipe with a different diameter, a mechanical tee is used in the construction process. A groove connection and a threaded connection are two types of connections. This type of connection is usually made for several reasons:
' Branch pipe must be installed somewhere on the main pipe.
Reducing tee can be used to lead a branch pipe out of an existing pipe of a fixed length (usually 6 meters), but the main pipe needs to be cut off.
' For the purpose of saving money.
The cost of a tee is greater than that of a mechanical tee. Under normal circumstances, mechanical tees are used when the diameter of the main pipe is 33, and U-shaped mechanical tees are usually used between 33 and 60. There are two ways to connect U-shaped mechanical tees: grooves or screws; they usually use 60 to 219 calibers, and they have an outer diameter of 21 to 33 inches (roughly 1/2" to 1"). The demand is not much different.
' Threaded mechanical tee
The threaded mechanical tee is a very special kind of grooved pipe fittings. It is similar to the grooved mechanical tee and is also widely used in grooved piping systems, but the branch pipe connection port of the threaded mechanical tee is connected by threads. The picture below shows the threaded mechanical tee.
Threaded mechanical tee
3. Standard Specifications for Grooved Tees, Grooved Mechanical Tees, and Grooved Threaded Tees
Grooved Mechanical Tees
Pipe O.D'D × d)
Working Pressure
Dimensions
Bolt/Nut Size
mm/in
mm/in
PSI/Mpa
K (mm/in)
W (mm/in)
L (mm/in)
H'mm/in'
No. - Size (mm)
100 × 25
114.3 × 33.7
300PSI
2.07MPa
363PSI
2.5MPa
102
71
180
80
M12×70
4 × 1
4.500 × 1.315
4.02
2.80
7.09
3.15
100 × 32
114.3 × 42.4
102
71
180
92
M12×70
4 × 1¼
4.500 × 1.660
4.02
2.80
7.09
3.62
100 × 40
114.3 × 48.3
102
71
180
92
M12×70
4 × 1½
4.500 × 1.900
4.02
2.80
7.09
3.62
100 × 50
114.3 × 60.3
102
71
180
107
M12×70
4 × 2
4.500 × 2.375
4.02
2.80
7.09
4.21
100 × 65
114.3 × 76.1
102
71
180
114
M12×70
4 × 2½
4.500 × 3.000
4.02
2.80
7.09
4.49
100 × 80
114.3 × 88.9
102
71
180
134
M12×70
4 × 3
4.500 × 3.500
4.02
2.80
7.09
5.28
125 × 65
139.7 × 76.1
115
84
217
114
M16×85
5 × 2½
5.500 × 3.000
4.53
3.31
8.54
4.49
125 × 80
139.7 × 88.9
115
84
217
134
M16×85
5 × 3
5.500 × 3.500
4.53
3.31
8.54
5.28
150 × 65
159.0 × 76.1
125
93
239
114
M16×95
6 × 2½
6.250 × 3.000
4.92
3.66
9.41
4.49
150 × 80
159.0 × 88.9
125
93
239
134
M16×95
6 × 3
6.250 × 3.500
4.92
3.66
9.41
5.28
150 × 100
159.0 × 108.0
130
93
239
162
M16×95
6 × 4
6.250 × 4.250
5.12
3.66
9.41
6.38
150 × 50
165.1 × 60.3
128
97
244
107
M16×95
6 × 2
6.500 × 2.375
5.04
3.82
9.61
4.21
150 × 65
165.1 × 76.1
128
97
244
114
M16×95
6 × 2½
6.500 × 3.000
5.04
3.82
9.61
4.49
150 × 80
165.1 × 88.9
128
97
244
134
M16×95
6 × 3
6.500 × 3.500
5.04
3.82
9.61
5.28
150 × 100
165.1 × 114.3
133
97
244
162
M16×95
6 × 4
6.500 × 4.500
5.24
3.82
9.61
6.38
200 × 50
219.1 × 60.3
156
126
307
107
M16×100
8 × 2
8.625 × 2.375
6.14
4.96
12.09
4.21
200 × 65
219.1 × 76.1
156
126
307
114
M16×100
8 × 2½
8.625 × 3.000
6.14
4.96
12.09
4.49
200 × 80
219.1 × 88.9
156
126
307
134
M16×100
8 × 3
8.625 × 3.500
6.14
4.96
12.09
5.28
200 × 100
219.1 × 114.3
158
126
307
162
M16×100
8 × 4
8.625 × 4.500
6.22
4.96
12.09
6.38
250 × 100
273.0× 114.3
187
152
384
162
M20×110
10 × 4
10.750 × 4.500
7.36
5.98
15.12
6.38
Grooved Threaded Tees
0
Pipe O.D'D × Rc)
Working Pressure
Dimensions
Bolt/Nut Size
mm/in
mm/in
PSI/Mpa
K (mm/in)
W (mm/in)
L (mm/in)
H 'mm/in'
No. - Size (mm)
65 × 25
76.1 × 33.7
300PSI
2.07MPa
363PSI
2.5MPa
68
51
136
80
M12×65
2½ × 1
3.000 × 1.315
2.68
2.01
5.35
3.15
65 × 32
76.1 × 42.4
70
51
136
92
M12×65
2½ × 1¼
3.000 × 1.660
2.76
2.01
5.35
3.62
65 × 40
76.1 × 48.3
70
51
136
92
M12×65
2½ × 1½
3.000 × 1.900
2.76
2.01
5.35
3.62
80 × 25
88.9 × 33.7
75
58
149
80
M12×65
3 × 1
3.500 × 1.315
2.95
2.28
5.87
3.15
80 × 32
88.9 × 42.4
78
58
149
92
M12×65
3 × 1¼
3.500 × 1.660
3.07
2.28
5.87
3.62
80 × 40
88.9 × 48.3
78
58
149
92
M12×65
3 × 1½
3.500 × 1.900
3.07
2.28
5.87
3.62
80 × 50
88.9 × 60.3
82
58
149
107
M12×65
3 × 2
3.500 × 2.375
3.23
2.28
5.87
4.21
100 × 25
108.0 × 33.7
87.5
68
174
80
M12×70
4 × 1
4.250 × 1.315
3.44
2.68
6.85
3.15
100 × 32
108.0 × 42.4
90
68
174
92
M12×70
4 × 1¼
4.250 × 1.660
3.54
2.68
6.85
3.62
100 × 40
108.0 × 48.3
90
68
174
92
M12×70
4 × 1½
4.250 × 1.900
3.54
2.68
6.85
3.62
100 × 50
108.0 × 60.3
94
68
174
107
M12×70
4 × 2
4.250 × 2.375
3.70
2.68
6.85
4.21
100 × 65
108.0 × 76.1
100
68
174
114
M12×70
4 × 2½
4.250 × 3.000
3.94
2.68
6.85
4.49
100 × 25
114.3 × 33.7
90
71
180
80
M12×70
4 × 1
4.500 × 1.315
3.54
2.80
7.09
3.15
100 × 32
114.3 × 42.4
92
71
180
92
M12×70
4 × 1¼
If you want to learn more, please visit our website fire fighting pipe.
4.500 × 1.660
3.62
2.80
7.09
3.62
100 × 40
114.3 × 48.3
92.5
71
180
92
M12×70
4 × 1½
4.500 × 1.900
3.64
2.80
7.09
3.62
100 × 50
114.3 × 60.3
96
71
180
107
M12×70
4 × 2
4.500 × 2.375
3.78
2.80
7.09
4.21
100 × 65
114.3 × 76.1
103
71
180
114
M12×70
4 × 2½
4.500 × 3.000
4.06
2.80
7.09
4.49
100 × 80
114.3 × 88.9
104
71
180
134
M12×70
4 × 3
4.500 × 3.500
4.09
2.80
7.09
5.28
125 × 65
133.0 × 76.1
112
80
210
114
M16×85
5 × 2½
5.250 × 3.000
4.41
3.15
8.27
4.49
125 × 80
133.0 × 88.9
113
80
210
134
M16×85
5 × 3
5.250 × 3.500
4.45
3.15
8.27
5.28
125 × 25
139.7 × 33.7
103
84
217
80
M16×85
5 × 1
5.500 × 1.315
4.06
3.31
8.54
3.15
125 × 32
139.7 × 42.4
105
84
217
92
M16×85
5 × 1¼
5.500 × 1.660
4.13
3.31
8.54
3.62
125 × 40
139.7 × 48.3
105
84
217
92
M16×85
5 × 1½
5.500 × 1.900
4.13
3.31
8.54
3.62
125 × 50
139.7 × 60.3
109
84
217
107
M16×85
5 × 2
5.500 × 2.375
4.29
3.31
8.54
4.21
125 × 65
139.7 × 76.1
116
84
217
114
M16×85
5 × 2½
5.500 × 3.000
4.57
3.31
8.54
4.49
125 × 80
139.7 × 88.9
117
84
217
134
M16×85
5 × 3
5.500 × 3.500
4.61
3.31
8.54
5.28
150 × 25
159.0 × 33.7
114
93
239
80
M16×95
6 × 1
6.250 × 1.315
4.49
3.66
9.41
3.15
150 × 32
159.0 × 42.4
116
93
239
92
M16×95
6 × 1¼
6.250 × 1.660
4.57
3.66
9.41
3.62
150 × 40
159.0 × 48.3
116
93
239
92
M16×95
6 × 1½
6.250 × 1.900
4.57
3.66
9.41
3.62
150 × 50
159.0 × 60.3
119
93
239
107
M16×95
6 × 2
6.250 × 2.375
4.69
3.66
9.41
4.21
150 × 65
159.0 × 76.1
124
93
239
114
M16×95
6 × 2½
6.250 × 3.000
4.88
3.66
9.41
4.49
150 × 80
159.0 × 88.9
125
93
239
134
M16×95
6 × 3
6.250 × 3.500
4.92
3.66
9.41
5.28
150 × 25
165.1 × 33.7
117
97
244
80
M16×95
6 × 1
6.500 × 1.315
4.61
3.82
9.61
3.15
150 × 32
165.1 × 42.4
118
97
244
92
M16×95
6 × 1¼
6.500 × 1.660
4.65
3.82
9.61
3.62
150 × 40
165.1 × 48.3
120
97
244
92
M16×95
6 × 1½
6.500 × 1.900
4.72
3.82
9.61
3.62
150 × 50
165.1 × 60.3
122
97
244
107
M16×95
6 × 2
6.500 × 2.375
4.80
3.82
9.61
4.21
150 × 65
165.1 × 76.1
127
97
244
114
M16×95
6 × 2½
6.500 × 3.000
5.00
3.82
9.61
4.49
150 × 80
165.1 × 88.9
128
97
244
134
M16×95
6 × 3
6.500 × 3.500
5.04
3.82
9.61
5.28
150 × 100
165.1 × 114.3
132
97
244
162
M16×95
6 × 4
6.500 × 4.500
5.20
3.82
9.61
6.38
200 × 25
219.1 × 33.7
143
126
307
80
M16×100
8 × 1
8.625 × 1.315
5.63
4.96
12.09
3.15
200 × 32
219.1 × 42.4
145
126
307
92
M16×100
8 × 1¼
8.625 × 1.660
5.71
4.96
12.09
3.62
200 × 40
219.1 × 48.3
145
126
307
92
M16×100
8 × 1½
8.625 × 1.900
5.71
4.96
12.09
3.62
200 × 50
219.1 × 60.3
149
126
307
107
M16×100
8 × 2
8.625 × 2.375
5.87
4.96
12.09
4.21
200 × 65
219.1 × 76.1
155
126
307
114
M16×100
8 × 2½
8.625 × 3.000
6.10
4.96
12.09
4.49
200 × 80
219.1 × 88.9
158
126
307
134
M16×100
8 × 3
8.625 × 3.500
6.22
4.96
12.09
5.28
250 × 25
273.0 × 33.7
175
152
384
80
M20×110
10 × 1
10.750 × 1.315
6.89
5.98
15.12
3.15
250 × 50
273.0 × 60.3
179
152
384
107
M20×110
10 × 2
10.750 × 2.375
7.05
5.98
15.12
4.21
Grooved Tees
Nominal Size
Pipe O.D
Working Pressure
Dimensions
mm/in
mm/in
PSI/Mpa
L (mm/in)
50
60.3
300PSI
2.07MPa
363PSI
2.5MPa
68.5
2
2.374
2.697
65
76.1
74
2½
2.996
2.913
80
88.9
84
3
3.500
3.307
100
108.0
100
4
4.252
3.937
100
114.3
100
4
4.500
3.937
125
133.0
122
5
5.236
4.803
125
139.7
122
5
5.500
4.803
150
159.0
138
6
6.260
5.433
150
165.1
138
6
6.500
5.433
200
219.1
171
8
8.626
6.732
250
273.0
212
10
10.748
8.346
300
323.9
242
12
12.752
9.528
250
273.0
225PSI
1.6MPa
363PSI
2.5MPa 225PSI
1.6MPa
212
10
10.748
8.346
300
323.9
242
12
12.752
9.528
If you are interested in grooved pipe fittings, please click the link below to enter the official website of Jianzhi Group to see more about grooved pipe fittings.
https://www.malleableiron-pipefitting.com/
If you are looking for more details, kindly visit galvanized pipe end caps.