Pipe Fitting Size Chart

Pipe fittings play a key role in plumbing, manufacturing, and construction. They help control the flow of liquids and gases, ensuring everything works smoothly and safely. However, choosing the right size is tricky. Balancing accuracy, material, and pressure is vital to avoid leaks, costly repairs, or system failures.

Pipe Fitting Size Chart

Pipe Elbow Nominal Size		Pipe Elbow Outside Diameter Y	Wall Thickness T (Pipe Elbow Schedule)		45 Deg. Elbow LR Centre to Face B	45 Deg. Elbow LR Weight	90 Deg. Elbow LR Centre to Face A	90 Deg. Elbow LR Weight	90 Deg. Elbow SR Centre to Face A	90 Deg. Elbow SR Weight
mm	in	mm	mm	Schedule	mm	kg	mm	kg	mm	kg
15	1/2”	21.3	2.78	STD	15.9	0.04	38.1	0.08	–	–
			3.73	X.S	15.9	0.05	38.1	0.10	–	–
20	3/4”	26.7	2.87	STD	11.1	0.04	28.6	0.08	–	–
			3.91	X.S	11.1	0.05	28.6	0.11	–	–
25	1”	33.4	3.38	STD	22.2	0.09	38.1	0.15	25.4	0.11
			4.55	X.S	22.2	0.11	38.1	0.19	25.4	0.14
32	11/4”	42.2	3.56	STD	25.4	0.14	47.6	0.28	31.75	0.18
			4.85	X.S	25.4	0.2	47.6	0.39	31.75	0.24
40	11/2”	48.3	3.68	STD	28.6	0.2	57.1	0.4	38.1	0.26
			5.08	X.S	28.6	0.25	57.1	0.5	38.1	0.35
50	2”	60.3	3.91	STD	34.9	0.36	76.2	0.72	50.8	0.5
			5.54	X.S	34.9	0.5	76.2	1.0	50.8	0.68
65	21/2”	73.0	5.16	STD	44.4	0.73	95.2	1.46	63.5	0.95
			7.01	X.S	44.4	0.91	95.2	1.82	63.5	1.27
80	3”	88.9	5.49	STD	50.8	1.1	114.3	2.18	76.2	1.45
			7.62	X.S	50.8	1.45	114.3	2.86	76.2	1.95
100	4”	114.3	6.02	STD	63.5	2.1	152.4	4.2	101.6	2.8
			8.56	X.S	63.5	2.9	152.4	5.7	101.6	3.9
125	5”	141.3	6.65	STD	79.4	3.4	190.0	6.8	127.0	4.8
			9.5	X.S	79.4	5.0	190.0	10.0	127.0	6.5
150	6”	168.3	7.11	STD	95.2	5.1	229.0	10.1	152.4	6.8
			10.97	X.S	95.2	7.7	229.0	15.3	152.4	10.2
200	8”	219.1	8.18	STD	127.0	10.2	305.0	20.4	203.0	13.6
			12.7	X.S	127.0	15.5	305.0	30.9	203.0	20.9
250	10”	273.9	9.27	STD	159.0	18.1	381.0	36.1	254.0	24.1
			12.7	X.S	159.0	24.4	381.0	48.8	254.0	32.5
300	12”	323.9	9.52	STD	190.0	26.6	457.0	53.1	305.0	35.4
			12.7	X.S	190.0	35.0	457.0	70.0	305.0	46.7
350	14”	355.6	9.52	STD	222.0	34.1	533.0	68.1	356.0	45.4
		12.7	X.S	222.0	45.0	533.0	90.0	356.0	60.0
16”	406.4	9.52	STD	254.0	45.0	610.0	89.3	406.0	59.5
		12.7	X.S	254.0	59.0	610.0	118.0	406.0	78.7
18”	457.0	9.52	STD	286.0	56.5	686.0	113.0	457.0	75.6
		12.7	X.S	286.0	75.0	686.0	150.0	457.0	100.0
20”	508.0	9.52	STD	318.0	85.0	762.0	140.0	508.0	93.5
		12.7	X.S	318.0	112.5	762.0	186.0	508.0	124.0
24”	610.00	9.52	STD	381.0	101.5	914.0	203.0	610.0	135.0
		12.7	X.S	381.0	134.5	914.0	269.0	610.0	179.0

Welded Butt Tee and Caps

Buttweld Tee and Cap Nominal Size		Pipe Tee and Cap Outside Diameter Y	Pipe Tee and Cap Wall Thickness T		Buttweld Tee Dimensions (C and M)	Buttweld Tee Weight	Buttweld Cap End to End	Buttweld Cap Weight
mm	in	mm	mm	Schedule	mm	mm	mm	kg
15	1/2”	21.3	2.78	STD	25.4	0.58
			3.73	X.S	25.4	0.21
20	3/4”	26.7	2.87	STD	28.6	0.21
			3.91	X.S	28.6	0.27
25	1”	33.4	3.38	STD	38.1	0.34	38.1	0.1
			4.55	X.S	38.1	0.43	38.1	0.14
32	11/4”	42.2	3.56	STD	47.6	0.64	38.1	0.14
			4.85	X.S	47.6	0.75	38.1	0.18
40	11/2”	48.3	3.68	STD	57.1	0.95	38.1	0.18
			5.08	X.S	57.1	1.13	38.1	0.23
50	2”	60.3	3.91	STD	63.5	1.45	38.1	0.27
			5.54	X.S	63.5	1.72	38.1	0.32
65	21/2”	73.0	5.16	STD	76.2	2.45	38.1	0.41
			7.01	X.S	76.2	2.95	38.1	0.45
80	3”	88.9	5.49	STD	85.7	3.45	50.8	0.64
			7.62	X.S	85.7	4.3	50.8	0.82
100	4”	114.3	6.02	STD	105.0	5.7	63.5	1.13
			8.56	X.S	105.0	7.3	63.5	1.54
125	5”	141.3	6.65	STD	124.0	9.1	76.2	1.91
			9.5	X.S	124.0	11.8	76.2	2.59
150	6”	168.3	7.11	STD	143.0	13.6	88.9	2.95
			10.97	X.S	143.0	19.0	88.9	4.1
200	8”	219.1	8.18	STD	178.0	25.0	101.6	5.0
			12.7	X.S	178.0	33.5	101.6	7.3
250	10”	273.0	9.27	STD	216.0	41.0	127.0	9.1
			12.7	X.S	216.0	54.0	127.0	12.0
300	12”	323.9	9.52	STD	254.0	57.0	152.4	13.6
			12.7	X.S	254.0	77.0	152.4	17.0
350	14”	355.6	9.52	STD	279.0	73.0	165.1	15.9
			12.7	X.S	279.0	93.0	165.1	21.0
400	16”	406.4	9.52	STD	305.0	91.0	178.8	20.0
			12.7	X.S	305.0	120.0	178.8	26.0
450	18”	457.0	9.52	STD	343.0	127.0	203.2	26.0
			12.7	X.S	343.0	165.0	203.2	34.0
500	20”	508.0	9.52	STD	381.0	227.0	228.6	33.0
			12.7	X.S	381.0	270.0	228.6	43.0
600	24”	610.0	9.52	STD	432.0	345.0	266.7	46.0
			12.7	X.S	432.0	430.0	266.7	61.0

Concentric/Eccentric Pipe Reducers

Buttweld Reducer Nominal Size		Pipe Reducer Length H	Pipe Reducer Schedule T	Pipe Reducer Weight
mm	in	mm		Kg
20×15	3/4” x 1/2”	38.1	STD	0.07
			XS	0.1
25×15	1” x 1/2”	50.8	STD	0.14
			X.S	0.18
25×20	1” x 3/4”	50.8	STD	0.14
			X.S	0.18
32×15	11/4” x 1/2”	50.8	STD	0.18
			X.S	0.23
32×20	11/4” x 3/4“	50.8	STD	0.18
			X.S	0.23
32×25	11/4” x 1”	50.8	STD	0.18
			X.S	0.23
40×15	11/2” x 1/2”	63.5	STD	0.27
			X.S	0.32
40×20	11/2” x 3/4”	63.5	STD	0.27
			X.S	0.32
40×25	11/2” x 1”	63.5	STD	0.27
			X.S	0.32
40×32	11/2” x 11/4”	63.5	STD	0.27
			X.S	0.32
50×15	2” x 1/2”	76.2	STD	0.41
			X.S	0.54
50×20	2” x 3/4”	76.2	STD	0.41
			X.S	0.54
50×25	2”x1”	76.2	STD	0.41
			X.S	0.54
50×32	2” x 11/4”	76.2	STD	0.41
			X.S	0.54
50×40	2” x 11/2”	76.2	STD	0.41
			X.S	0.54
65×25	21/2” x 1”	88.9	STD	0.68
			X.S	0.91
65×32	21/2” x 11/4”	88.9	STD	0.68
			X.S	0.91
65×40	21/2” x 11/2”	88.9	STD	0.68
			X.S	0.91
65×50	21/2” x 2”	88.9	STD	0.68
			X.S	0.91
80×40	3” x 11/2”	88.9	STD	0.77
			X.S	1.09
80×50	3”x2”	88.9	STD	0.91
			X.S	1.22
80×65	3” x 21/2”	88.9	STD	0.91
			X.S	1.27
100×40	4” x 11/2”	101.6	STD	1.36
			X.S	1.91
100×50	4”x2”	101.6	STD	1.40
			X.S	1.95
100×65	4” x 21/2”	101.6	STD	1.45
			X.S	2.04
100×80	4”x3”	101.6	STD	1.59
			X.S	2.08
125×80	5”x3”	127.0	STD	2.5
			X.S	3.4
125 x 100	5”x4”	127.0	STD	2.7
			X.S	3.8
150×50	6”x2”	140.0	STD	3.4
			X.S	4.3
150×65	6” x 21/2”	140.0	STD	3.4
			X.S	4.5
150×80	6”x3”	140.0	STD	3.6
			X.S	4.8
150 x 100	6”x4”	140.0	STD	3.7
			X.S	5.2
150 x 125	6”x5”	140.0	STD	3.9
			X.S	5.4
200×80	8”x3”	152.4	STD	4.5
			X.S	7.2
200 x 100	8”x4”	152.4	STD	5.0
			X.S	7.7
200 x 125	8”x5”	152.4	STD	5.4
			X.S	8.2
200 x 150	8”x6”	152.4	STD	5.9
			X.S	8.6
250 x 100	10”x4”	178.0	STD	9.1
			X.S	11.8
250 x 125	10”x5”	178.0	STD	9.5
			X.S	13.6
250 x 150	10”x6”	178.0	STD	9.5
			X.S	13.6
250 x 200	10”x8”	178.0	STD	10.0
			X.S	14.0
300 x 150	12”x6”	203.0	STD	14.1
			X.S	18.1
300 x 200	12”x8”	203.0	STD	14.5
			X.S	19.1
300 x 250	12” x 10”	203.0	STD	15.4
			X.S	20.0
350 x 200	14”x8”	330.0	STD	26.3
			X.S	34.9
350 x 250	14” x 10”	330.0	STD	27.2
			X.S	36.3
350 x 300	14” x 12”	330.0	STD	28.6
			X.S	37.6
400 x 200	16”x8”	356.0	STD	31.8
			X.S	42.6
400 x 250	16” x 10”	356.0	STD	33.1
			X.S	43.5
400 x 300	16” x 12”	356.0	STD	34.5
			X.S	45.4

Understanding Pipe Fitting Sizes

Understanding pipe fitting sizes can be tricky, especially for beginners. While it seems logical to measure the pipe’s diameter directly, fittings are actually based on nominal pipe size (NPS), which often differs from actual measurements. This adds complexity when selecting the right size.

You must balance accuracy, system requirements, and material type. Failing to consider these factors could lead to fitting mismatches, inefficient flow, or costly repairs. Therefore, it’s crucial to choose carefully, keeping in mind how each decision impacts the overall system’s performance.

Why Accuracy Matters in Pipe Fitting Sizes

Accuracy in pipe fitting sizes is critical because even a small mistake can lead to major problems. For example, choosing the wrong size might cause leaks or pressure drops, resulting in system inefficiencies. These issues often require expensive repairs and can halt operations. Balancing cost, material, and system requirements can be challenging.

Using a cheaper or easier-to-find fitting may seem tempting, but the long-term effects—like downtime or damage—can outweigh the short-term convenience. Therefore, making informed decisions about pipe fitting sizes is essential to ensure reliable and efficient system performance.

Step-by-Step Guide to Using a Pipe Fitting Size Chart

To use a pipe fitting size chart effectively, begin by measuring the pipe’s outside diameter (OD) accurately. Next, find the corresponding nominal pipe size (NPS) on the chart. This process helps you identify the correct fitting.

While it’s straightforward, challenges can arise if the pipe’s material or pressure rating isn’t considered. For instance, fittings designed for one material might not work well with another, leading to potential leaks or inefficiencies.

Additionally, balancing cost with quality is crucial; cheaper fittings might save money upfront but could lead to higher long-term costs due to failures. Thus, thorough measurement and careful selection based on the chart are vital for ensuring optimal performance and durability.

Common Challenges When Selecting Pipe Fitting Sizes

Selecting the right pipe fitting size can be challenging due to several factors. Firstly, variations in manufacturing standards across different regions or brands can cause inconsistencies.

Additionally, material compatibility plays a crucial role; not all fittings work well with every type of pipe. For instance, a fitting suitable for PVC might not perform well with metal pipes. System pressure requirements further complicate the decision, as fittings must withstand specific pressure levels without failure.

Balancing these factors—cost, material, and pressure—can be tricky. Opting for a fitting that meets all requirements is essential to avoid leaks, inefficiencies, and costly repairs, making careful consideration of these aspects crucial for optimal performance.

FAQs

1. What is the difference between Nominal Pipe Size (NPS) and Outside Diameter (OD)?
Answer: Nominal Pipe Size (NPS) is a standardized measurement used to identify pipe sizes, but it does not reflect the actual diameter of the pipe. Instead, it is a rough approximation of the internal diameter. On the other hand, Outside Diameter (OD) measures the total diameter of the pipe, including its wall thickness. Understanding both measurements is crucial for selecting the right fittings, as they affect how well components will fit together and function in your system.

2. How do I measure my pipe correctly to find the right fitting?
Answer: To measure your pipe accurately, first use a caliper or measuring tape to determine the Outside Diameter (OD) of the pipe. Once you have this measurement, refer to the pipe fitting size chart to find the corresponding Nominal Pipe Size (NPS). This NPS will guide you in selecting the appropriate fitting. Ensure you measure precisely and account for any potential variations in pipe thickness or manufacturing standards to avoid mismatches and system issues.

3. What should I do if I encounter a fitting that doesn’t match my pipe size perfectly?
Answer: If you find a fitting that doesn’t match your pipe size exactly, consider using an adapter or coupling that bridges the size difference. It’s essential to ensure that any adapters or couplings used are compatible with both the pipe material and pressure requirements. Additionally, consult the fitting manufacturer’s specifications and guidelines to ensure that the selected components will work together effectively and safely, minimizing the risk of leaks or system failures.