How to Convert Pipe Fitting Size by ASME B16.9? (Elbow, Reducer, Tee, Cap)

Overview

Pipe fittings are commonly used materials that are responsible for connecting different pipes together. However, pipe fittings come in many types and complex shapes. Its size representation method is often confusing. Even many people who have worked in the metal industry for a long time may not be able to clearly understand how to convert the size of pipe fittings into what they are familiar with. In this article, we will introduce different types of pipe fittings and how to convert their sizes one by one.

Introduction to ASME B16.9 and Nominal Pipe Schedule

Before understanding different pipe fittings, it is necessary to first understand the ASME B16.9 standard and Nominal Pipe Schedule.

Nominal Pipe Schedule is a way to indicate pipe size. Its typical form is:

1" SCH40

1" is the NPS (Nominal Pipe Size) value, which indicates the outer diameter of the pipe. SCH40 indicates the wall thickness of the pipe. It can be converted to the more familiar OD×THK form through the Nominal Pipe Schedule. If you are unfamiliar with this, we recommend that you read our previous article that introduces the Nominal Pipe Schedule in detail:

What is Nominal Pipe Size Schedule? Introducing ASME B36.10 and B36.19.

Due to the complex shapes of pipe fittings, only the outer diameter and wall thickness cannot well represent their size. They also require other dimensional parameters, and ASME B16.9 stipulates the dimensional parameters required for different types of pipe fittings and defines their conversion methods. They will be introduced in detail below.

Elbow Size

Classification of Elbows

An elbow is a pipe fitting that allows a pipe to turn. Therefore, according to the angle of the turn, elbows can be divided into 45° elbows, 90° elbows and 180° elbows (also called returns). The following figure shows different types of elbows:

90° Elbow

45° Elbow

180° Elbow

Elbows are also divided into long radius elbows and short radius elbows. As the name suggests, the turning radius of a long radius elbow is larger, while that of a short radius elbow is smaller. The following figure shows the difference between a long radius elbow and a short radius elbow:

Long Radius Elbow

Short Radius Elbow

How to Indicate Elbow Size

The standard form of elbow size is:

1" SCH40, LR

1" SCH40 represents the outer diameter and wall thickness of the elbow respectively. LR represents a long radius elbow, and if it is a short radius elbow, it is represented by SR.

In addition to these three parameters, the elbow also requires a Center-to-End value (for 180° elbow, it is Center-to-Center), which defines the distance from the center of the elbow to the two ends of the elbow (for 180° elbow, it is the distance between the centers). It can approximately represent half the length of the elbow. The following figure shows the Center-to-End (A and B respectively) and Center-to-Center (O) of different types of elbows:

Conversion of Elbow Size

First, you need to calculate the outer diameter and wall thickness according to the Nominal Pipe Schedule. For example, 1" SCH40 corresponds to an outer diameter of 33.4mm and a wall thickness of 3.38mm.

Second, you need to determine the type of elbow. Then confirm the A, B or O of the elbow according to the different types and NPS values. The following lists the conversion tables of different types of elbows in ASME B16.9:

Long Radius 45° Elbow &
Long Radius 90° Elbow
Nominal Pipe Size NPS	DN	Outside Diameter at Bevel	Center-to-End
Nominal Pipe Size NPS	DN	Outside Diameter at Bevel	45° Elbow A	90° Elbow B
½	15	21.3	38	16
¾	20	26.7	38	19
1	25	33.4	38	22
1¼	32	42.2	48	25
1½	40	48.3	57	29
2	50	60.3	76	35
2½	65	73.0	95	44
3	80	88.9	114	51
3½	90	101.6	133	57
4	100	114.3	152	64
5	125	141.3	190	79
6	150	168.3	229	95
8	200	219.1	305	127
10	250	273.0	381	159
12	300	323.8	457	190
14	350	355.6	533	222
16	400	406.4	610	254
18	450	457	686	286
20	500	508	762	318
22	550	559	838	343
24	600	610	914	381
26	650	660	991	405
28	700	711	1067	438
30	750	762	1143	470
32	800	813	1219	502
34	850	864	1295	533
36	900	914	1372	565
38	950	965	1448	600
40	1000	1016	1524	632
42	1050	1067	1600	660
44	1100	1118	1676	695
46	1150	1168	1753	727
48	1200	1219	1829	759

Unfold

Long Radius 180° Elbow
Nominal Pipe Size NPS	DN	Outside Diameter at Bevel	Center-to-Center O
½	15	21.3	76
¾	20	26.7	76
1	25	33.4	76
1¼	32	42.2	95
1½	40	48.3	114
2	50	60.3	152
2½	65	73.0	190
3	80	88.9	229
3½	90	101.6	267
4	100	114.3	305
5	125	141.3	381
6	150	168.3	457
8	200	219.1	610
10	250	273.0	762
12	300	323.8	914
14	350	355.6	1067
16	400	406.4	1219
18	450	457	1372
20	500	508	1524
22	550	559	1676
24	600	610	1829

Unfold

Short Radius 90° Elbow
Nominal Pipe Size NPS	DN	Outside Diameter at Bevel	Center-to-End A
1	25	33.4	25
1¼	32	42.2	32
1½	40	48.3	38
2	50	60.3	51
2½	65	73.0	64
3	80	88.9	76
3½	90	101.6	89
4	100	114.3	102
5	125	141.3	127
6	150	168.3	152
8	200	219.1	203
10	250	273.0	254
12	300	323.8	305
14	350	355.6	356
16	400	406.4	406
18	450	457	457
20	500	508	508
22	550	559	559
24	600	610	610

Unfold

Short Radius 180° Elbow
Nominal Pipe Size NPS	DN	Outside Diameter at Bevel	Center-to-Center O
1	25	33.4	51
1¼	32	42.2	64
1½	40	48.3	76
2	50	60.3	102
2½	65	73.0	127
3	80	88.9	152
3½	90	101.6	178
4	100	114.3	203
5	125	141.3	254
6	150	168.3	305
8	200	219.1	406
10	250	273.0	508
12	300	323.8	610
14	350	355.6	711
16	400	406.4	813
18	450	457	914
20	500	508	1016
22	550	559	1118
24	600	610	1219

Unfold

Reducer Size

Classification of Reducers

The function of reducers is to connect pipes of different sizes. Reducers are divided into concentric reducers and eccentric reducers. Concentric reducers can make the connected pipes have the same center. Eccentric reducers can align one side of two pipes. The following are the pictures of concentric reducers and eccentric reducers and the difference between them after connecting pipes.

Concentric Reducer

Eccentric Reducer

How to Indicate Reducer Size

Reducers are indicated in the following form:

2" SCH80 × 1" SCH40

You may have noticed that there are two Nominal Pipe Schedules on both sides of the "×", which respectively indicate the outer diameter and wall thickness of the two ends of the reducer. For example: 1" SCH40 means that the outer diameter of one end of the reducer is 33.4mm and the wall thickness is 3.38mm; 2" SCH80 means that the outer diameter of the other end is 60.3mm and the wall thickness is 5.54mm.

In addition to the outer diameter and wall thickness, the reducer also needs a height, which is represented by End-to-End (H). The value of H can also be obtained in ASME B16.9.

Conversion of Reducer Size

Whether it is a concentric reducer or an eccentric reducer, their H values are the same. Therefore, we only need to know its two NPS values to find the corresponding H value in ASME B16.9:

Nominal Pipe Size NPS	DN	Outside Diameter at Bevel		End-to-End H	Nominal Pipe Size NPS	DN	Outside Diameter at Bevel		End-to-End H
Nominal Pipe Size NPS	DN	Large End	Small End	End-to-End H	Nominal Pipe Size NPS	DN	Large End	Small End	End-to-End H
¾×½	20×15	26.7	21.3	38	20×18	500×450	508	457	508
¾×⅜	20×10	26.7	17.3	38	20×16	500×400	508	406.4	508
1×¾	25×20	33.4	26.7	51	20×14	500×350	508	355.6	508
1×½	25×15	33.4	21.3	51	20×12	500×300	508	323.8	508
1¼×1	32×25	42.2	33.4	51	22×20	550×500	559	508	508
1¼×¾	32×20	42.2	26.7	51	22×18	550×450	559	457	508
1¼×½	32×15	42.2	21.3	51	22×16	550×400	559	406.4	508
1½×1¼	40×32	48.3	42.2	64	22×14	550×350	559	355.4	508
1½×1	40×25	48.3	33.4	64	24×22	600×550	610	559	508
1½×¾	40×20	48.3	26.7	64	24×20	600×500	610	508	508
1½×½	40×15	48.3	21.3	64	24×18	600×450	610	457	508
2×1½	50×40	60.3	48.3	76	24×16	600×400	610	406.4	508
2×1¼	50×32	60.3	42.2	76	26×24	650×600	660	610	610
2×1	50×25	60.3	33.4	76	26×22	650×550	660	559	610
2×¾	50×20	60.3	26.7	76	26×20	650×500	660	508	610
2½×2	65×50	73	60.3	89	26×18	650×450	660	457	610
2½×1½	65×40	73	48.3	89	28×26	700×650	711	660	610
2½×1¼	65×32	73	42.2	89	28×24	700×600	711	610	610
2½×1	65×25	73	33.4	89	28×22	700×550	711	508	610
3×2½	80×65	88.9	73	89	28×20	700×500	711	457	610
3×2	80×50	88.9	60.3	89	30×28	750×700	762	711	610
3×1½	80×40	88.9	48.3	89	30×26	750×650	762	660	610
3×1¼	80×32	88.9	42.2	89	30×24	750×600	762	610	610
3½×3	90×80	101.6	88.9	102	30×22	750×550	762	508	610
3½×2½	90×65	101.6	73	102	32×30	800×750	813	762	610
3½×2	90×50	101.6	60.3	102	32×28	800×700	813	711	610
3½×1½	90×40	101.6	48.3	102	32×26	800×650	813	660	610
3½×1¼	90×32	101.6	42.2	102	32×24	800×600	813	610	610
4×3½	100×90	114.3	101.6	102	34×32	850×800	864	813	610
4×3	100×80	114.3	88.9	102	34×30	850×750	864	762	610
4×2½	100×65	114.3	73	102	34×28	850×700	864	660	610
4×2	100×50	114.3	60.3	102	34×26	850×650	864	610	610
4×1½	100×40	114.3	48.3	102	36×34	900×850	914	864	610
5×4	125×100	141.3	114.3	127	36×32	900×800	914	813	610
5×3½	125×90	141.3	101.6	127	36×30	900×750	914	762	610
5×3	125×80	141.3	88.9	127	36×28	900×700	914	660	610
5×2½	125×65	141.3	73	127	36×26	900×650	914	610	610
5×2	125×50	141.3	60.3	127	38×36	950×900	965	914	610
6×5	150×125	168.3	141.3	140	38×34	950×850	965	864	610
6×4	150×100	168.3	114.3	140	38×32	950×800	965	813	610
6×3½	150×90	168.3	101.6	140	38×30	950×750	965	762	610
6×3	150×80	168.3	88.9	140	38×28	950×700	965	711	610
6×2½	150×65	168.3	73	140	38×26	950×650	965	660	610
8×6	200×150	219.1	168.3	152	40×38	1000×950	1016	965	610
8×5	200×125	219.1	141.3	152	40×36	1000×900	1016	914	610
8×4	200×100	219.1	114.3	152	40×34	1000×850	1016	864	610
8×3½	200×90	219.1	101.6	152	40×32	1000×800	1016	813	610
10×8	250×200	273	219.1	178	40×30	1000×750	1016	762	610
10×6	250×150	273	168.3	178	42×40	1050×1000	1067	1016	610
10×5	250×125	273	141.3	178	42×38	1050×950	1067	965	610
10×4	250×100	273	114.3	178	42×36	1050×900	1067	914	610
12×10	300×250	323.8	273	203	42×34	1050×850	1067	864	610
12×8	300×200	323.8	219.1	203	42×32	1050×800	1067	813	610
12×6	300×150	323.8	168.3	203	42×30	1050×750	1067	762	610
12×5	300×125	323.8	141.3	203	44×42	1100×1050	1118	1067	610
14×12	350×300	355.6	323.8	330	44×40	1100×1000	1118	1016	610
14×10	350×250	355.6	273	330	44×38	1100×950	1118	965	610
14×8	350×200	355.6	219.1	330	44×36	1100×900	1118	914	610
14×6	350×150	355.6	168.3	330	46×44	1150×1100	1168	1118	711
16×14	400×350	406.4	355.6	356	46×42	1150×1050	1168	1067	711
16×12	400×300	406.4	323.8	356	46×40	1150×1000	1168	1016	711
16×10	400×250	406.4	273	356	46×38	1150×950	1168	965	711
16×8	400×200	406.4	219.1	356	48×46	1200×1150	1219	1168	711
18×16	450×400	457	406.4	381	48×44	1200×1100	1219	1118	711
18×14	450×350	457	355.6	381	48×42	1200×1050	1219	1067	711
18×12	450×300	457	323.8	381	48×40	1200×1000	1219	1016	711
18×10	450×250	457	273	381

Unfold

Tee size

Classification of Tees

Tee is a pipe fitting that connects three pipes and is in the shape of a T. Tees can be divided into equal tees (also called straight tee) and reducing tees. The three nozzles of equal tees have the same outer diameter and wall thickness, while reducing tees have different nozzles. Generally, the vertical nozzle size of reducing tees is smaller. The following figure shows equal tees and reducing tees:

Equal Tee

Reducing Tee

How to Indicate Tee Size

The tee is indicated as follows:

2" SCH80
or
2" SCH80 × 1" SCH40

The former indicates that it is an equal tee, which means that the three nozzles of the tee are of the same size, with an outer diameter of 60.3mm and a wall thickness of 5.54mm.

The latter indicates the size of the reducing tee. The two sides of the "×" indicate the parallel nozzle size and the vertical nozzle size respectively. The conversion method is similar to the reducer.

In addition to the outer diameter and wall thickness, the tee has two important parameters, namely the Center-to-End (C and M) in the parallel and vertical directions:

For small-sized tees, the Center-to-End in both directions is the same. Large-sized tees have different C and M.

Conversion of Tee Size

The outer diameter and wall thickness of the tee can also be directly obtained through the Nominal Pipe Schedule. The values of C and M should refer to ASME Table in B16.9:

Equal Tee
Nominal Pipe Size NPS	DN	Outside Diameter at Bevel	Center-to-End
Nominal Pipe Size NPS	DN	Outside Diameter at Bevel	Run C	Outlet M
½	15	21.3	25	25
¾	20	26.7	29	29
1	25	33.4	38	38
1¼	32	42.2	48	48
1½	40	48.3	57	57
2	50	60.3	64	64
2½	65	73.0	76	76
3	80	88.9	86	86
3½	90	101.6	95	95
4	100	114.3	105	105
5	125	141.3	124	124
6	150	168.3	143	143
8	200	219.1	178	178
10	250	273.0	216	216
12	300	323.8	254	254
14	350	355.6	279	279
16	400	406.4	305	305
18	450	457	343	343
20	500	508	381	381
22	550	559	419	419
24	600	610	432	432
26	650	660	495	495
28	700	711	521	521
30	750	762	559	559
32	800	813	597	597
34	850	864	635	635
36	900	914	673	673
38	950	965	711	711
40	1000	1016	749	749
42	1050	1067	762	711
44	1100	1118	813	762
46	1150	1168	851	800
48	1200	1219	889	838

Unfold

Reducing Tee
Nominal Pipe Size NPS	DN	Outside Diameter at Bevel		Center-to-End
Nominal Pipe Size NPS	DN	Run	Outlet	Run C	Outlet M
½×½×⅜	15×15×10	21.3	17.3	25	25
½×½×¼	15×15×8	21.3	13.7	25	25
¾×¾×½	20×20×15	26.7	21.3	29	29
¾×¾×⅜	20×20×10	26.7	17.3	29	29
1×1×¾	25×25×20	33.4	26.7	38	38
1×1×½	25×25×15	33.4	21.3	38	38
1¼×1¼×1	32×32×25	42.2	33.4	48	48
1¼×1¼×¾	32×32×20	42.2	26.7	48	48
1¼×1¼×½	32×32×15	42.2	21.3	48	48
1½×1½×1¼	40×40×32	48.3	42.2	57	57
1½×1½×1	40×40×25	48.3	33.4	57	57
1½×1½×¾	40×40×20	48.3	26.7	57	57
1½×1½×½	40×40×15	48.3	21.3	57	57
2×2×1½	50×50×40	60.3	48.3	64	60
2×2×1¼	50×50×32	60.3	42.2	64	57
2×2×1	50×50×25	60.3	33.4	64	51
2×2×¾	50×50×20	60.3	26.7	64	44
2½×2½×2	65×65×50	73.0	60.3	76	70
2½×2½×1½	65×65×40	73.0	48.3	76	67
2½×2½×1¼	65×65×32	73.0	42.2	76	64
2½×2½×1	65×65×25	73.0	33.4	76	57
3×3×2½	80×80×65	88.9	73.0	86	83
3×3×2	80×80×50	88.9	60.3	86	76
3×3×1½	80×80×40	88.9	48.3	86	73
3×3×1¼	80×80×32	88.9	42.2	86	70
3½×3½×3	90×90×80	101.6	88.9	95	92
3½×3½×2½	90×90×65	101.6	73.0	95	89
3½×3½×2	90×90×50	101.6	60.3	95	83
3½×3½×1½	90×90×40	101.6	48.3	95	79
4×4×3½	100×100×90	114.3	101.6	105	102
4×4×3	100×100×80	114.3	88.9	105	98
4×4×2½	100×100×65	113.3	73.0	105	95
4×4×2	100×100×50	114.3	60.3	105	89
4×4×1½	100×100×40	114.3	48.3	105	86
5×5×4	125×125×100	141.3	114.3	125	117
5×5×3½	125×125×90	141.3	101.6	124	114
5×5×3	125×125×80	141.3	88.9	124	111
5×5×2½	125×125×65	141.3	73.0	124	108
5×5×2	125×125×50	141.3	60.3	124	105
6×6×5	150×150×125	168.3	141.3	143	137
6×6×4	150×150×100	168.3	114.3	143	130
6×6×3½	150×150×90	168.3	101.6	143	127
6×6×3	150×150×80	168.3	88.9	143	124
6×6×2½	150×150×65	168.3	73.0	143	121
8×8×6	200×200×150	219.1	168.3	178	168
8×8×5	200×200×125	219.1	141.3	178	162
8×8×4	200×200×100	219.1	114.3	178	156
8×8×3½	200×200×90	219.1	101.6	178	152
10×10×8	250×250×200	273.0	219.1	216	203
10×10×6	250×250×150	273.0	168.3	216	194
10×10×5	250×250×125	273.0	141.3	216	191
10×10×4	250×250×100	273.0	114.3	216	184
12×12×10	300×300×250	323.8	273.0	254	241
12×12×8	300×300×200	323.8	219.1	254	229
12×12×6	300×300×150	323.8	168.3	254	219
12×12×5	300×300×125	323.8	141.3	254	216
14×14×12	350×350×300	355.6	323.8	279	270
14×14×10	350×350×250	355.6	273.0	279	257
14×14×8	350×350×200	355.6	219.1	279	248
14×14×6	350×350×150	355.6	168.3	279	238
16×16×14	400×400×350	406.4	355.6	305	305
16×16×12	400×400×300	406.4	323.8	305	295
16×16×10	400×400×250	406.4	273.0	305	283
16×16×8	400×400×200	406.4	219.1	305	273
16×16×6	400×400×150	406.4	168.3	305	264
18×18×16	450×450×400	457	406.4	343	330
18×18×14	450×450×350	457	355.6	343	330
18×18×12	450×450×300	457	323.8	343	321
18×18×10	450×450×250	457	273.0	343	308
18×18×8	450×450×200	457	219.1	343	298
20×20×18	500×500×450	508	457	381	368
20×20×16	500×500×400	508	406.4	381	356
20×20×14	500×500×350	508	355.6	381	356
20×20×12	500×500×300	508	323.8	381	346
20×20×10	500×500×250	508	273.0	381	333
20×20×8	500×500×200	508	219.1	381	324
22×22×20	550×550×500	559	508	419	406
22×22×18	550×550×450	559	457	419	394
22×22×16	550×550×400	559	406.4	419	381
22×22×14	550×550×350	559	355.6	419	381
22×22×12	550×550×300	559	323.8	419	371
22×22×10	550×550×250	559	273.0	419	359
24×24×22	600×600×550	610	559	432	432
24×24×20	600×600×500	610	508	432	432
24×24×18	600×600×450	610	457	432	419
24×24×16	600×600×400	610	406.4	432	406
24×24×14	600×600×350	610	355.6	432	406
24×24×12	600×600×300	610	323.8	432	397
24×24×10	600×600×250	610	273.0	432	384
26×26×24	650×650×600	660	610	495	483
26×26×22	650×650×550	660	559	495	470
26×26×20	650×650×550	660	508	495	457
26×26×18	650×650×450	660	457	495	444
26×26×16	650×650×400	660	406.4	495	432
26×26×14	650×650×350	660	355.6	495	432
26×26×12	650×650×300	660	323.8	495	422
28×28×26	700×700×650	711	660	521	521
28×28×24	700×700×600	711	610	521	508
28×28×22	700×700×550	711	559	521	495
28×28×20	700×700×500	711	508	521	483
28×28×18	700×700×450	711	457	521	470
28×28×16	700×700×400	711	406.4	521	457
28×28×14	700×700×350	711	355.6	521	457
28×28×12	700×700×300	711	323.8	521	448
30×30×28	750×750×700	762	711	559	546
30×30×26	750×750×650	762	660	559	546
30×30×24	750×750×600	762	610	559	533
30×30×22	750×750×550	762	559	559	521
30×30×20	750×750×500	762	508	559	508
30×30×18	750×750×450	762	457	559	495
30×30×16	750×750×400	762	406.4	559	483
30×30×14	750×750×350	762	355.6	559	483
30×30×12	750×750×300	762	323.8	559	473
30×30×10	750×750×250	762	273.0	559	460
32×32×30	800×800×750	813	762	597	584
32×32×28	800×800×700	813	711	597	572
32×32×26	800×800×650	813	660	597	572
32×32×24	800×800×600	813	610	597	559
32×32×22	800×800×550	813	559	597	546
32×32×20	800×800×500	813	508	597	533
32×32×18	800×800×450	813	457	597	521
32×32×16	800×800×400	813	406.4	597	508
32×32×14	800×800×350	813	355.6	597	508
34×34×32	850×850×800	864	813	635	622
34×34×30	850×850×750	864	762	635	610
34×34×28	850×850×700	864	711	635	597
34×34×26	850×850×650	864	600	635	597
34×34×24	850×850×600	864	610	635	584
34×34×22	850×850×550	864	559	635	572
34×34×20	850×850×500	864	508	635	559
34×34×18	850×850×450	864	457	635	546
34×34×16	850×850×400	864	406.4	635	533
36×36×34	900×900×850	914	864	673	660
36×36×32	900×	900×800	914	813	673	648
36×36×30	900×	900×750	914	762	673	635
36×36×28	900×	900×700	914	711	673	622
36×36×26	900×	900×650	914	660	673	622
36×36×24	900×	900×600	914	610	673	610
36×36×22	900×	900×550	914	559	673	597
36×36×20	900×	900×500	914	508	673	584
36×36×18	900×	900×450	914	457	673	572
36×36×16	900×	900×400	914	406.4	673	559
38×38×36	950×950×900	965	914	711	711
38×38×34	950×950×850	965	864	711	698
38×38×32	950×950×800	965	813	711	686
38×38×30	950×950×750	965	762	711	673
38×38×28	950×950×700	965	711	711	648
38×38×26	950×950×650	965	660	711	648
38×38×24	950×950×600	965	610	711	635
38×38×22	950×950×550	965	559	711	622
38×38×20	950×950×500	965	508	711	610
38×38×18	950×950×450	965	457	711	597
40×40×38	1000×1000×950	1016	965	749	749
40×40×36	1000×1000×900	1016	914	749	737
40×40×34	1000×1000×850	1016	864	749	724
40×40×32	1000×1000×800	1016	813	749	711
40×40×30	1000×1000×750	1016	762	749	698
40×40×28	1000×1000×700	1016	711	749	673
40×40×26	1000×1000×650	1016	560	749	673
40×40×24	1000×1000×600	1016	610	749	660
40×40×22	1000×1000×550	1016	559	749	648
40×40×20	1000×1000×500	1016	508	749	635
40×40×18	1000×1000×450	1016	457	749	622
42×42×40	1050×1050×1000	1067	1016	762	711
42×42×38	1050×1050×950	1067	968	762	711
42×42×36	1050×1050×900	1067	914	762	711
42×42×34	1050×1050×850	1067	864	762	711
42×42×32	1050×1050×800	1067	813	762	711
42×42×30	1050×1050×750	1067	762	762	711
42×42×28	1050×1050×700	1067	711	762	698
42×42×26	1050×1050×650	1067	660	762	698
42×42×24	1050×1050×600	1067	610	762	660
42×42×22	1050×1050×550	1067	559	762	660
42×42×20	1050×1050×500	1067	508	762	660
42×42×18	1050×1050×450	1067	457	762	648
42×42×16	1050×1050×400	1067	406.4	762	635
44×44×42	1100×1100×1050	1118	1067	813	762
44×44×40	1100×1100×1000	1118	1016	813	749
44×44×38	1100×1100×950	1118	965	813	737
44×44×36	1100×1100×900	1118	914	813	724
44×44×34	1100×1100×850	1118	864	813	724
44×44×32	1100×1100×800	1118	813	813	711
44×44×30	1100×1100×750	1118	762	813	711
44×44×28	1100×1100×700	1118	711	813	698
44×44×26	1100×1100×650	1118	660	813	698
44×44×24	1100×1100×600	1118	610	813	698
44×44×22	1100×1100×550	1118	559	813	686
44×44×20	1100×1100×500	1118	508	813	686
46×46×44	1150×1150×1100	1168	1118	851	800
46×46×42	1150×1150×1050	1168	1067	851	787
46×46×40	1150×1150×1000	1168	1016	851	775
46×46×38	1150×1150×950	1168	965	851	762
46×46×36	1150×1150×900	1168	914	851	762
46×46×34	1150×1150×850	1168	864	851	749
46×46×32	1150×1150×800	1168	813	851	749
46×46×30	1150×1150×750	1168	762	851	737
46×46×28	1150×1150×700	1168	711	851	737
46×46×26	1150×1150×650	1168	660	851	737
46×46×24	1150×1150×600	1168	610	851	724
46×46×22	1150×1150×550	1168	559	851	724
48×48×46	1200×1200×1150	1219	1168	889	838
48×48×44	1200×1200×1100	1219	1118	889	838
48×48×42	1200×1200×1050	1219	1067	889	813
48×48×40	1200×1200×1000	1219	1016	889	813
48×48×38	1200×1200×950	1219	965	889	813
48×48×36	1200×1200×900	1219	914	889	787
48×48×34	1200×1200×850	1219	864	889	787
48×48×32	1200×1200×800	1219	813	889	787
48×48×30	1200×1200×750	1219	762	889	762
48×48×28	1200×1200×700	1219	711	889	762
48×48×26	1200×1200×650	1219	660	889	762
48×48×24	1200×1200×600	1219	610	889	737
48×48×22	1200×1200×550	1219	559	889	737

Unfold

Pipe Cap Size

The pipe cap is a pipe fitting that plugs one end of the pipe. Since there are no different categories of pipe caps, its size is very simple:

2" SCH40

It also indicates the outer diameter and wall thickness of the pipe cap. In addition, the pipe cap also requires a length value E.

length E can be confirmed by the table in ASME B16.9:

Nominal Pipe Size NPS	DN	Outside Diameter at Bevel	Length E [Note 1]	Limiting Wall Thickness for Length, E	Length E1 [Note 2]
½	15	21.3	25	4.57	25
¾	20	26.7	25	3.81	25
1	25	33.4	38	4.57	38
1¼	32	42.2	38	4.83	38
1½	40	48.3	38	5.08	38
2	50	60.3	38	5.59	44
2½	65	73.0	38	7.11	51
3	80	88.9	51	7.62	64
3½	90	101.6	64	8.13	76
4	100	114.3	64	8.64	76
5	125	141.3	76	9.65	89
6	150	168.3	89	10.92	102
8	200	219.1	102	12.70	127
10	250	273.0	127	12.70	152
12	300	323.8	152	12.70	178
14	350	355.6	165	12.70	191
16	400	406.4	178	12.70	203
18	450	457	203	12.70	229
20	500	508	229	12.70	254
22	550	559	254	12.70	254
24	600	610	267	12.70	305
26	650	660	267	...	...
28	700	711	267	...	...
30	750	762	267	...	...
32	800	813	267	...	...
34	850	864	267	...	...
36	900	914	267	...	...
38	950	965	305	...	...
40	1000	1016	305	...	...
42	1050	1067	305	...	...
44	1100	1118	343	...	...
46	1150	1168	343	...	...
48	1200	1219	343	...	...
NOTES: (1) Length E applies for thickness not exceeding that given in column "Limiting Wall Thickness for Length E." (2) Length E1 applies for thickness greater than that given in column "Limiting Wall Thickness" for NPS 24 (DN 600) and smaller. For NPS 26 (DN 65) and larger, length E1 shall be by agreement between manufacturer and purchaser.

Unfold

FAQ

Why is the wall thickness of the pipe fittings confirmed by the Nominal Pipe Schedule?

Since the function of the pipe fittings is to connect the pipes, they must match the size of the pipes, and the standard sizes of the pipes are confirmed by the Nominal Pipe Schedule. That's why the pipe fittings need to follow the size of the Nominal Pipe Schedule.

What if the pipe fittings I need are not in the standard?

You can provide specific drawings to the supplier. However, non-standard pipe fittings require special molds. Therefore, if your quantity is small, I am afraid that supply will become difficult.

What are welded pipe fittings?

Welding can refer to both the production method of pipe fittings and the connection method of pipe fittings to pipes.
If you refer to the production method, it means that the pipe fittings are made of welded pipes. In contrast, seamless pipe fittings are made of seamless pipes.
If you refer to the connection method, then welded pipe fittings refer to pipe fittings that are designed to be connected to pipes using welding. The general welding method used for pipe fittings is butt welding. Therefore, welded pipe fittings almost all require chamfers. In contrast to welded pipe fittings are threaded pipe fittings, which are connected to pipes in the form of threads.

Conclusion

Pipe fittings are materials used to connect pipes. According to their different functions, pipe fittings can be divided into elbows, reducers, tees and caps. Due to the complex shapes of pipe fittings, a standard method is needed to indicate their sizes. However, the standard pipe fittings representation method does not conform to people's intuition. Therefore, we need to convert the pipe fittings size through the nominal pipe schedule and the ASME B16.9 standard.

We can provide you with different nickel alloy / superalloy pipe fittings according to ASME B16.9, and can also customize them according to your drawings. If you have any purchasing needs, please contact our email:

[email protected]

✔ E-mail has been Copied

2025.02.07

AEETHER

How to Convert the Size of Pipe Fitting (Elbow, Reducer, Tee, Cap)?
Introducing ASME B16.9.

Quick Reference

How to Convert Pipe Fitting Size?

Overview

Introduction to ASME B16.9 and Nominal Pipe Schedule