Technical Info

Weldolets


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Pipe Elbow fittings is a very important pipe fitting. When we talk about a pipe elbow, it means a length of pipe with a sharp bend in it. Pipe elbows are fitting accessories which are used widely in various industrial sectors in pipe fitting. A pipe elbow is frequently used in pressurized applications and is available in various shapes and sizes for use in different applications. A pipe elbow is a fitting installed between two lengths of pipe or tube allowing a change of direction, usually in the 45° & 90° or 180° direction.


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.