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WELDOLET


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Dimensions size on size Weldolets® according to MSS-SP97

  NPS  

 

Standard Weight (STD) - NPS 1/2 up to NPS 24

A

B

C

D

L

1/2

INCH
MM

3/4
19.05

1-3/8
34.93

15/16
23.81

5/8
15.88

1-3/16
30.16

3/4

INCH
MM

7/8
22.23

1-5/8
41.28

1-3/16
30.16

13/16
20.64

1-7/16
36.51

1

INCH
MM

1-1/16
26.99

2
50.80

1-7/16
36.51

1-1/32
26.19

1-1/16
26.99

1 ¼

INCH
MM

1-1/4
31.75

2-3/8
60.3

1-3/4
44.45

1-3/8
34.93

2-1/16
52.39

1 ½

INCH
MM

1-5/16
33.34

2-7/8
73

2
50.80

1-5/8
41.28

2-1/4
57.15

2

INCH
MM

1-1/2
38.10

3-1/2
88.90

2-9/16
65.09

2-1/16
52.39

2-11/16
68.26

2 ½

INCH
MM

1-5/8
41.28

4-1/16
103.19

3
76.20

2-7/16
61.91

3-1/16
77.79

3

INCH
MM

1-3/4
44.45

4-13/16
122.24

3-11/16
93.66

3-1/16
77.79

3-1/2
88.90

3 ½

INCH
MM

2
50.80

5-3/8
136.53

3-7/8
98.43

3-9/16
90.49

3-7/8
98.43

4

INCH
MM

2
50.80

6
152.40

4-3/4
120.65

4
101.60

4-1/4
107.95

5

INCH
MM

2-1/4
57.15

7-1/8
180.98

5-9/16
141.29

5-1/16
128.59

5-1/16
128.59

6

INCH
MM

2-3/8
60.3

8-1/2
215.90

6-11/16
169.86

6-1/16
153.99

5-11/16
144.46

8

INCH
MM

2-3/4
69.85

10-3/8
263.53

8-11/16
220.66

7-15/16
201.61

7-1/16
179.39

10

INCH
MM

3-1/16
77.79

12-9/16
319.09

10-13/16
274.64

10
254.00

8-7/16
214.31

12

INCH
MM

3-3/8
85.73

14-7/8
377.83

12-13/16
325.44

12
304.80

9-3/4
247.65

14

INCH
MM

3-1/2
88.90

16-1/8
409.58

14-1/16
357.19

13-1/4
336.55

10-1/2
266.70

16

INCH
MM

3-11/16
93.66

18-1/4
463.55

16-1/16
407.99

15-1/4
387.35

11-11/16
296.86

18

INCH
MM

4-1/16
103.19

20-3/4
527.05

18-5/8
473.08

17-1/4
438.15

13-1/16
331.79

20

INCH
MM

4-5/8
117.48

23-1/16
585.79

20-1/16
509.59

19-1/4
488.95

14-5/8
371.48

24

INCH
MM

5-3/8
136.53

27-7/8
708.03

25-1/8
638.18

23-1/4
590.55

17-3/8
441.33



Dimensions size on size Weldolets® according to MSS-SP97

  NPS  

 

Extra Strong (XS) - NPS 1/2 up to NPS 24

A

B

C

D

L

1/2

INCH
MM

3/4
19.05

1-3/8
34.93

15/16
23.81

5/8
15.88

1-3/16
30.16

3/4

INCH
MM

7/8
22.23

1-5/8
41.28

1-3/16
30.16

13/16
20.64

1-7/16
36.51

1

INCH
MM

1-1/16
26.99

2
50.80

1-7/16
36.51

1-1/32
26.19

1-11/16
42.86

1 ¼

INCH
MM

1-1/4
31.75

2-7/16
61.91

1-3/4
44.45

1-3/8
34.93

2-1/16
52.39

1 ½

INCH
MM

1-5/16
33.34

2-7/8
73

2
50.80

1-5/8
41.28

2-1/4
57.15

2

INCH
MM

1-1/2
38.10

3-1/2
88.90

2-9/16
65.09

2-1/16
52.39

2-11/16
68.26

2 ½

INCH
MM

1-5/8
41.28

4-1/16
103.19

3
76.20

2-7/16
61.91

3-1/16
77.79

3

INCH
MM

1-3/4
44.45

4-13/16
122.24

3-11/16
93.66

3-1/16
77.79

3-1/2
88.90

3 ½

INCH
MM

2
50.80

5-3/8
136.53

3-7/8
98.43

3-9/16
90.49

3-7/8
98.43

4

INCH
MM

2
50.80

6
152.40

4-3/4
120.65

4
101.60

4-1/4
107.95

5

INCH
MM

2-1/4
57.15

7-1/8
180.98

5-9/16
141.29

5-1/16
128.59

5-1/16
128.59

6

INCH
MM

3-1/16
77.79

8-7/8
225.43

6-11/16
169.86

6-1/16
153.99

6-3/8
161.93

8

INCH
MM

3-7/8
98.43

10-5/8
269.88

8-11/16
220.66

7-5/8
193.68

8-3/16
207.96

10

INCH
MM

3-1/2
88.90

12-7/8
327.03

10-7/16
265.11

9-3/4
254.00

8-7/8
225.43

12

INCH
MM

3-15/16
100.01

15-3/16
385.76

13
330.20

11-3/4
304.80

10-5/16
261.94

14

INCH
MM

4-1/8
104.78

16-11/16
423.86

14-5/16
363.54

13
330.20

11-1/8
282.58

16

INCH
MM

4-7/16
112.71

18-7/8
479.43

16-1/2
419.10

15
381.00

12-7/16
315.91

18

INCH
MM

4-11/16
119.06

21-1/8
536.58

18-5/8
473.08

17
431.80

13-11/16
347.66

20

INCH
MM

5
127.00

23-3/8
593.73

20-13/16
528.64

19
482.60

15
381.00

24

INCH
MM

5-1/2
139.70

27-7/8
708.03

25-1/8
638.18

23
584.20

17-1/2
444.50



Dimensions reducing Weldolets® according to MSS-SP97

  NPS  

 

Standard Weight (STD) - NPS 1/2 up to NPS 24

A

B

C

1/2

INCH
MM

3/4
19.05

1-3/8
34.93

15/16
23.81

3/4

INCH
MM

7/8
22.23

1-3/4
44.45

1-3/16
30.16

1

INCH
MM

1-1/16
26.99

2-1/8
53.98

1-7/16
36.51

1 ¼

INCH
MM

1-1/4
31.75

2-9/16
65.09

1-3/4
44.45

1 ½

INCH
MM

1-5/16
33.34

2-7/8
73

2
50.80

2

INCH
MM

1-1/2
38.10

3-1/2
88.90

2-9/16
65.09

2 ½

INCH
MM

1-5/8
41.28

4-1/16
103.19

3
76.20

3

INCH
MM

1-3/4
44.45

4-13/16
122.24

3-11/16
93.66

3 ½

INCH
MM

1-7/8
47.63

5-5/8
142.88

4
101.60

4

INCH
MM

2
50.80

6
152.40

4-3/4
120.65

5

INCH
MM

2-1/4
57.15

7-1/16
179.39

5-9/16
141.29

6

INCH
MM

2-3/8
60.3

8-1/2
215.90

6-11/16
169.86

8

INCH
MM

2-3/4
69.85

10-3/8
263.53

8-11/16
220.66

10

INCH
MM

3-1/16
77.79

12-11/16
322.26

10-13/16
274.64

12

INCH
MM

3-3/8
85.73

14-7/8
377.83

12-13/16
325.44

14

INCH
MM

3-1/2
88.90

16-1/8
409.58

14-1/16
357.19

16

INCH
MM

3-11/16
93.66

18-1/4
463.55

16-1/16
407.99

18

INCH
MM

3-13/16
96.84

20-1/2
520.70

18-1/16
458.79

20

INCH
MM

4
101.60

22-1/2
571.50

20
508.00

24

INCH
MM

4-9/16
115.89

27-1/8
688.98

24-3/16
614.36



Dimensions (L) Center Line of Run Pipe to Face of Weldolet (Table 1 of 2)

  NP S  

 

Outlet Sizes STD and XS - NPS 1/2 up to NPS 4

1/2

3/4

1

1-1/4

1-1/2

2

2-1/2

3

3-1/2

4

3/4

INCH
MM

1-1/4
31.75

 

 

 

 

 

 

 

 

 

1

INCH
MM

1-3/8
34.92

1-1/2
38.10

 

 

 

 

 

 

 

 

1 ¼

INCH
MM

1-9/16
39.68

1-11/16
42.86

1-7/8
47.62

 

 

 

 

 

 

 

1 ½

INCH
MM

1-11/16
42.86

1-13/16
46.03

2
50.80

2-3/16
55.56

 

 

 

 

 

 

2

INCH
MM

1-15/16
49.21

2-1/16
52.38

2-1/4
57.15

2-7/16
61.91

2-1/2
63.50

 

 

 

 

 

2 ½

INCH
MM

2-3/16
55.56

2-5/16
58.73

2-1/2
63.50

2-11/16
68.26

2-3/4
69.85

2-15/16
74.61

 

 

 

 

3

INCH
MM

2-1/2
63.5

2-5/8
66.67

2-13/16
71.43

3
76.20

3-1/16
77.78

3-1/4
82.55

3-3/8
85.72

 

 

 

3 ½

INCH
MM

2-3/4
69.85

2-7/8
73.02

3-1/16
77.78

3-1/4
82.55

3-5/16
84.13

3-1/2
88.9

3-5/8
92.07

3-3/4
95.25

 

 

4

INCH
MM

3
76.2

3-1/8
79.37

3-5/16
84.13

3-1/2
88.90

3-9/16
90.48

3-3/4
95.25

3-7/8
98.42

4
101.60

4-1/8
104.77

 

5

INCH
MM

3-9/16
90.48

3-11/16
93.66

3-7/8
98.42

4-1/16
103.18

4-1/8
104.77

4-5/16
109.53

4-7/16
112.71

4-9/16
115.88

4-11/16
119.06

4-13/16
122.23

6

INCH
MM

4-1/16
103.18

4-3/16
106.36

4-3/8
111.12

4-9/16
115.88

4-5/8
117.47

4-13/16
122.23

4-15/16
125.41

5-1/16
128.58

5-3/16
131.76

5-5/16
134.93

8

INCH
MM

5-1/16
128.58

5-3/16
131.76

5-3/8
136.52

5-9/16
141.28

5-5/8
142.87

5-13/16
147.63

5-15/16
150.81

6-1/16
153.98

6-3/16
157.16

6-5/16
160.3

10

INCH
MM

6-1/8
155.57

6-1/4
158.75

6-7/16
163.51

6-5/8
168.27

6-11/16
169.86

6-7/8
174.62

7
177.8

7-1/8
180.97

7-1/4
184.15

7-3/8
187.32

12

INCH
MM

7-1/8
180.97

7-1/4
184.15

7-7/16
188.91

7-5/8
193.67

7-11/16
195.26

7-7/8
200.02

8
203.20

8-1/8
206.37

8-1/4
209.55

8-3/8
212.72

14

INCH
MM

7-3/4
196.85

7-7/8
200.02

8-1/16
204.78

8-1/4
209.55

8-5/16
211.13

8-1/2
215.90

8-5/8
219.07

8-3/4
222.25

8-7/8
225.42

9
228.60

16

INCH
MM

8-3/4
222.25

8-7/8
225.42

9-1/16
230.18

9-1/4
234.95

9-5/16
236.53

9-1/2
241.30

9-5/8
244.47

9-3/4
247.65

9-7/8
250.82

10
254.00

18

INCH
MM

9-3/4
247.65

9-7/8
250.82

10-1/16
255.58

10-1/4
260.35

10-5/16
261.93

10-1/2
266.70

10-5/8
269.87

10-3/4
273

10-7/8
276.22

11
279.40

20

INCH
MM

10-3/4
273

10-7/8
276.22

11-1/16
280.98

11-1/4
285.75

11-5/16
287.33

11-1/2
292.10

11-5/8
295.27

11-3/4
298.45

11-7/8
301.62

12
304.80

24

INCH
MM

12-3/4
323.9

12-7/8
327.02

13-1/16
331.78

13-1/4
336.55

13-5/16
338.13

13-1/2
342.90

13-5/8
346.07

13-3/4
349.25

13-7/8
352.42

14
355.60



Dimensions (L) Center Line of Run Pipe to Face of Weldolet (Table 2 of 2)

  NPS  

 

Outlet Sizes Standard Weight (STD) - NPS 5 up to NPS 20

5

6

8

10

12

14

16

18

20

6

INCH
MM

5-9/16
141.28

 

 

 

 

 

 

 

 

8

INCH
MM

6-9/16
166.68

6-11/16
169.86

 

 

 

 

 

 

 

10

INCH
MM

7-5/8
193.67

7-3/4
196.85

8-1/8
206.37

 

 

 

 

 

 

12

INCH
MM

8-5/8
219.07

8-3/4
222.25

9-1/8
231.77

9-7/16
239.71

 

 

 

 

 

14

INCH
MM

9-1/4
234.95

9-3/8
238.12

9-3/4
247.65

10-1/16
255.58

10-3/8
263.52

 

 

 

 

16

INCH
MM

10-1/4
260.35

10-3/8
263.52

10-3/4
273

11-1/16
280.98

11-3/8
288.92

11-1/2
292.10

 

 

 

18

INCH
MM

11-1/4
285.75

11-3/8
288.92

11-3/4
298.45

12-1/16
306.38

12-3/8
314.32

12-1/2
317.50

12-11/16
322.26

 

 

20

INCH
MM

12-1/4
311.15

12-3/8
314.32

12-3/4
323.9

13-1/16
331.78

13-3/8
339.72

13-1/2
342.90

13-11/16
347.66

13-13/16
350.83

 

24

INCH
MM

14-1/4
361.95

14-3/8
365.12

14-3/4
374.65

15-1/16
382.58

15-3/8
390.52

15-1/2
393.70

15-11/16
398.46

15-13/16
401.63

16
406.40



Dimensions reducing Weldolets® according to MSS-SP97

  NPS  

 

Extra Strong (XS) - NPS 1/2 up to NPS 24

A

B

C

1/2

INCH
MM

3/4
19.05

1-3/8
34.93

15/16
23.81

3/4

INCH
MM

7/8
22.23

1-3/4
44.45

1-3/16
30.16

1

INCH
MM

1-1/16
26.99

2-1/8
53.98

1-7/16
36.51

1 ¼

INCH
MM

1-1/4
31.75

2-9/16
65.09

1-3/4
44.45

1 ½

INCH
MM

1-5/16
33.34

2-7/8
73

2
50.80

2

INCH
MM

1-1/2
38.10

3-1/2
88.90

2-9/16
65.09

2 ½

INCH
MM

1-5/8
41.28

4-1/16
103.19

3
76.20

3

INCH
MM

1-3/4
44.45

4-13/16
122.24

3-11/16
93.66

3 ½

INCH
MM

1-7/8
47.63

5-3/8
136.53

4
101.60

4

INCH
MM

2
50.80

6
152.40

4-3/4
120.65

5

INCH
MM

2-1/4
57.15

7-1/16
179.39

5-9/16
141.29

6

INCH
MM

3-1/16
77.79

8-7/8
225.43

6-11/16
169.86

8

INCH
MM

3-7/8
98.43

11-1/2
292.10

8-11/16
220.66

10

INCH
MM

3-11/16
93.66

12-3/4
323.9

10-7/16
265.11

12

INCH
MM

4-1/16
103.19

14-15/16
379.41

12-1/2
317.50

14

INCH
MM

3-15/16
100.01

17
431.80

13-13/16
350.84

16

INCH
MM

4-3/16
106.36

18-3/8
466.73

15-7/8
403.23

18

INCH
MM

4-3/8
111.13

20-3/8
517.53

17-5/16
439.74

20

INCH
MM

4-11/16
119.06

22-15/16
582.61

20-1/16
509.59

24

INCH
MM

5-1/2
139.70

27-7/8
708.03

24-3/16
614.36



Dimensions (L) Center Line of Run Pipe to Face of Weldolet (Table 1 of 2)

  NPS  

 

Outlet Sizes STD and XS - NPS 1/2 up to NPS 4

1/2

3/4

1

1-1/4

1-1/2

2

2-1/2

3

3-1/2

4

3/4

INCH
MM

1-1/4
31.75

 

 

 

 

 

 

 

 

 

1

INCH
MM

1-3/8
34.92

1-1/2
38.10

 

 

 

 

 

 

 

 

1 ¼

INCH
MM

1-9/16
39.68

1-11/16
42.86

1-7/8
47.62

 

 

 

 

 

 

 

1 ½

INCH
MM

1-11/16
42.86

1-13/16
46.03

2
50.80

2-3/16
55.56

 

 

 

 

 

 

2

INCH
MM

1-15/16
49.21

2-1/16
52.38

2-1/4
57.15

2-7/16
61.91

2-1/2
63.50

 

 

 

 

 

2 ½

INCH
MM

2-3/16
55.56

2-5/16
58.73

2-1/2
63.50

2-11/16
68.26

2-3/4
69.85

2-15/16
74.61

 

 

 

 

3

INCH
MM

2-1/2
63.5

2-5/8
66.67

2-13/16
71.43

3
76.20

3-1/16
77.78

3-1/4
82.55

3-3/8
85.72

 

 

 

3 ½

INCH
MM

2-3/4
69.85

2-7/8
73.02

3-1/16
77.78

3-1/4
82.55

3-5/16
84.13

3-1/2
88.9

3-5/8
92.07

3-3/4
95.25

 

 

4

INCH
MM

3
76.2

3-1/8
79.37

3-5/16
84.13

3-1/2
88.90

3-9/16
90.48

3-3/4
95.25

3-7/8
98.42

4
101.60

4-1/8
104.77

 

5

INCH
MM

3-9/16
90.48

3-11/16
93.66

3-7/8
98.42

4-1/16
103.18

4-1/8
104.77

4-5/16
109.53

4-7/16
112.71

4-9/16
115.88

4-11/16
119.06

4-13/16
122.23

6

INCH
MM

4-1/16
103.18

4-3/16
106.36

4-3/8
111.12

4-9/16
115.88

4-5/8
117.47

4-13/16
122.23

4-15/16
125.41

5-1/16
128.58

5-3/16
131.76

5-5/16
134.93

8

INCH
MM

5-1/16
128.58

5-3/16
131.76

5-3/8
136.52

5-9/16
141.28

5-5/8
142.87

5-13/16
147.63

5-15/16
150.81

6-1/16
153.98

6-3/16
157.16

6-5/16
160.3

10

INCH
MM

6-1/8
155.57

6-1/4
158.75

6-7/16
163.51

6-5/8
168.27

6-11/16
169.86

6-7/8
174.62

7
177.8

7-1/8
180.97

7-1/4
184.15

7-3/8
187.32

12

INCH
MM

7-1/8
180.97

7-1/4
184.15

7-7/16
188.91

7-5/8
193.67

7-11/16
195.26

7-7/8
200.02

8
203.20

8-1/8
206.37

8-1/4
209.55

8-3/8
212.72

14

INCH
MM

7-3/4
196.85

7-7/8
200.02

8-1/16
204.78

8-1/4
209.55

8-5/16
211.13

8-1/2
215.90

8-5/8
219.07

8-3/4
222.25

8-7/8
225.42

9
228.60

16

INCH
MM

8-3/4
222.25

8-7/8
225.42

9-1/16
230.18

9-1/4
234.95

9-5/16
236.53

9-1/2
241.30

9-5/8
244.47

9-3/4
247.65

9-7/8
250.82

10
254.00

18

INCH
MM

9-3/4
247.65

9-7/8
250.82

10-1/16
255.58

10-1/4
260.35

10-5/16
261.93

10-1/2
266.70

10-5/8
269.87

10-3/4
273

10-7/8
276.22

11
279.40

20

INCH
MM

10-3/4
273

10-7/8
276.22

11-1/16
280.98

11-1/4
285.75

11-5/16
287.33

11-1/2
292.10

11-5/8
295.27

11-3/4
298.45

11-7/8
301.62

12
304.80

24

INCH
MM

12-3/4
323.9

12-7/8
327.02

13-1/16
331.78

13-1/4
336.55

13-5/16
338.13

13-1/2
342.90

13-5/8
346.07

13-3/4
349.25

13-7/8
352.42

14
355.60


Dimensions (L) Center Line of Run Pipe to Face of Weldolet (Table 2 of 2)

  NPS  

 

Outlet Sizes Extra Strong (XS) - NPS 5 up to NPS 20

5

6

8

10

12

14

16

18

20

6

INCH
MM

5-9/16
141.28

 

 

 

 

 

 

 

 

8

INCH
MM

6-9/16
166.68

7-3/8
187.33

 

 

 

 

 

 

 

10

INCH
MM

7-5/8
193.67

7-3/4
196.85

9-1/4
234.95

 

 

 

 

 

 

12

INCH
MM

8-5/8
219.07

9-7/16
239.71

10-1/4
260.35

10-1/16
255.59

 

 

 

 

 

14

INCH
MM

9-1/4
234.95

10-1/16
255.59

10-7/8
276.23

10-11/16
271.46

11-1/16
280.99

 

 

 

 

16

INCH
MM

10-1/4
260.35

11-1/16
280.99

11-7/8
301.63

11-11/16
296.86

12-1/16
301.39

11-15/16
303.21

 

 

 

18

INCH
MM

11-1/4
285.75

12-1/16
306.39

12-7/8
327.03

12-11/16
322.26

13-1/16
331.79

12-15/16
328.61

13-3/16
334.96

 

 

20

INCH
MM

12-1/4
311.15

13-1/16
331.79

13-7/8
352.43

13-11/16
347.66

14-1/16
357.19

13-5/16
338.14

14-3/16
360.36

14-3/8
365.13

 

24

INCH
MM

14-1/4
361.95

15-1/16
382.59

15-7/8
403.23

15-11/16
398.46

16-1/16
407.99

15-15/16
404.81

16-3/16
411.16

16-3/8
415.93

16-1/16
407.99


  • Stainless Steel Olets
    SS 304 Olets
    SS 304L Olets
    SS 304H Olets
    SS 316 Olets
    SS 316L Olets
    SS 316Ti Olets
    SS 310 Olets
    SS 310S Olets
    SS 321 Olets
    SS 321H Olets
    SS 317 Olets
    SS 347 Olets
    SS 347H Olets
  • Alloy Steel Olets
    Nickel Alloys Olets
    Nickel 200 Olets
    Nickel 201 Olets
    Monel 400 Olets
    Monel 500 Olets
    Inconel 800 Olets
    Inconel 825 Olets
    Inconel 600 Olets
    Inconel 625 Olets
    Inconel 601 Olets
  • Carbon Steel ASTM A 234 Olets
    Hastelloy C 276 Olets
    Alloy 20 Olets
    Titanium Olets
    Duplex Steel 2205 Olets
    Copper Alloys Olets
    Aluminium Olets
    Copper Olets
    Brass Olets
    Gunmetal Olets


General notes:

  • X = Root Gap not included in L measure.
  • L = Dimensions Center Line of Run Pipe to Face of Weldolet.
  • Bevelled Ends according to ASME B16.9 and B16.25.
  • Weldolet® is a registered name. Another often used name for a Weldolet is Welding Outlet.
 

     

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