What does IPS Size Mean for Pipe or Tube?

Iron Pipe Size (IPS)

Iron Pipe Size (IPS or I.P.S.) pipe sizing system based on the inside diameter (ID) of pipe. It was widely used from the early 19th century to the mid 20th century and is still in use by some industries, including major PVC pipe manufacturers, as well as for some legacy drawings and equipment.

The iron pipe size standard came into being early in the 19th century and remained in effect until after World War II. The IPS system was primarily used in the United States and the United Kingdom. In the 1920s, the Copper Tube Size (CTS) standard was combined with the IPS standard.

Nominal Pipe Size Inches	Nominal Pipe Size mm	Outside Diameter Inches	Outside Diameter mm	Schedule Number	Wall Thickness Inches	Weight of Pipe Lb/ft	Weight of Water Lb/ft
1/2"	15	0.84	21
				10S	0.083	0.67	0.15
				40/STD.	0.109	0.85	0.13
				80/XS	0.147	1.09	0.10
				160	0.187	1.30	0.07
				XX	0.294	1.72	0.02
3/4"	20	1.05	27
				10S	0.083	0.86	0.27
				5S	0.065	0.68	0.29
				40/STD./40S	0.113	1.13	0.21
				80/XS/80S	0.154	1.47	0.19
				160	0.218	1.94	0.13
				XX	0.308	2.44	0.06
1"	25	1.315	33
				5S	0.065	0.87	0.48
				10S	0.109	0.87	0.41
				40/STD./40S	0.133	1.40	0.37
				80/XS/80S	0.179	1.68	0.31
				160	0.250	2.17	0.23
				XX	0.358	2.84	0.12
1-1/4"	32	1.66	42
				5S	0.065	1.11	0.80
				10S	0.109	1.81	0.71
				40/STD./40S	0.140	2.27	0.65
				80/XS/80S	0.191	3.00	0.56
				160	0.250	3.77	0.46
				XX	0.382	5.22	0.27
1-1/2"	40	1.9	48.3
				5S	0.065	1.28	0.65
				10S	0.109	2.09	0.96
				40/STD./40S	0.145	2.72	0.88
				80/XS/80S	0.200	3.63	0.77
				160	0.281	4.87	0.61
				XX	0.400	6.41	0.41
2"	50	2.375	60.3
				0.065	0.065	1.28	1.71
				10S	0.109	2.64	1.58
				40/STD./40S	0.154	3.65	1.45
				80/XS/80S	0.218	5.02	1.28
				160	0.343	7.45	0.97
				XX	0.436	9.03	0.77
2-1/2"	65	2.875	73
				5S	0.083	2.48	2.50
				10S	0.120	3.53	2.36
				40/STD./40S	0.203	5.79	2.07
				80/XS/80S	0.276	7.66	1.84
				160	0.375	10.01	1.54
				XX	0.552	13.70	1.07
3"	80	3.5	89
				5S	0.083	3.03	3.78
				10S	0.120	4.33	3.61
				40/STD./40S	0.216	7.58	3.20
				80/XS/80S	0.300	10.25	2.86
				160	0.438	14.33	2.34
				XX	0.600	18.58	1.80
3-1/2"	90	4	102
				5S	0.083	3.03	3.78
				10S	0.120	4.33	3.61
				40/STD./40S	0.216	7.58	3.20
				80/XS/80S	0.300	10.25	2.86
4"	100	4.5	114
				5S	0.083	3.91	6.39
				10S	0.120	5.61	6.17
				LW	0.188	8.66	5.78
				40/STD./40S	0.237	10.79	5.51
				80/XS/80S	0.337	14.99	4.98
				120	0.438	19.00	4.47
				160	0.531	22.51	4.02
				XX	0.674	27.54	3.38
5"	125	5.563	141
				5S	0.109	6.38	9.71
				10S	0.134	7.77	9.53
				40/STD./40S	0.258	14.62	8.66
				80/XS/80S	0.375	20.78	7.88
				120	0.500	27.04	7.06
				160	0.625	32.97	6.33
				XX	0.750	38.55	5.61
6"	150	6.625	168
				5S	0.109	7.58	13.96
				10S	0.134	9.29	13.74
				LW	0.219	14.99	13.02
				40/STD./40S	0.280	18.98	12.51
				80/XS/80S	0.432	28.58	11.29
				120	0.562	36.40	10.29
				160	0.718	45.30	9.16
				XX	0.864	53.17	8.16
8"	200	8.625	219
				5S	0.109	9.91	24.04
				10S	0.148	13.40	23.59
				LW	0.219	19.66	22.94
				20	0.250	22.37	22.45
				30	0.277	24.70	22.15
				40/STD./40S	0.322	28.55	21.65
				60	0.406	35.60	20.58
				80/XS/80S	0.500	43.40	19.80
				100	0.593	50.90	18.80
				120	0.718	60.60	17.60
				140	0.812	67.80	16.70
				XX	0.875	72.40	16.10
				160	0.906	74.70	15.80
10"	250	10.75	273
				5S	0.134	9.91	37.40
				10S	0.165	18.70	36.90
				LW	0.219	24.70	36.10
				20	0.250	28.00	35.70
				30	0.307	34.20	34.90
				40/STD./40S	0.365	40.48	34.10
				60/XS/80S	0.500	54.70	32.30
				80	0.593	64.30	31.10
				100	0.718	76.90	29.50
				120	0.843	89.20	27.90
				140	1.000	104.10	26.00
				160	1.125	115.70	24.60
12"	300	12.75	324
				5S	0.156	21.00	52.60
				10S	0.180	24.20	52.20
				20/LW	0.250	33.40	51.00
				30	0.330	43.80	49.70
				STD./40S	0.375	49.60	49.00
				40	0.406	53.50	48.50
				XS/80S	0.500	65.40	47.00
				60	0.562	73.20	46.00
				80	0.687	88.50	44.00
				100	0.843	107.20	41.60
				120	1.000	125.50	39.30
				140	1.125	139.70	37.50
				160	1.312	160.30	34.90
14"	350	14	356
				5S	0.156	23.10	63.70
				10S	0.188	27.70	63.10
				10 (LW)	0.250	36.70	62.00
				20	0.312	45.70	60.80
				30/STD	0.375	54.60	59.70
				40	0.438	63.40	58.60
				XS	0.500	72.10	57.50
				60	0.593	84.90	55.80
				80	0.750	106.10	53.10
				100	0.937	130.80	50.00
				120	1.093	150.70	47.50
				140	1.250	170.20	45.00
				160	1.406	189.10	42.60
16"	400	16	406
				5S	0.169	27.90	83.50
				10S	0.188	31.80	83.00
				10 (LW)	0.250	42.10	81.70
				20	0.312	52.40	80.40
				30/STD	0.375	62.60	79.10
				40/XS	0.500	82.80	76.50
				60	0.656	107.50	73.40
				80	0.843	136.50	69.70
				100	1.031	164.80	66.10
				120	1.218	192.30	62.60
				140	1.438	223.70	58.60
				160	1.596	245.10	55.58
18"	450	18	457
				5S	0.165	31.40	106.20
				10S	0.188	35.80	105.60
				10 (LW)	0.250	47.40	104.10
				20	0.312	59.00	102.70
				STD	0.375	70.60	101.20
				30	0.438	82.20	99.70
				XS	0.500	93.50	98.30
				40	0.562	104.70	96.90
				60	0.750	138.20	92.60
				80	0.937	170.80	88.40
				100	1.156	208.00	83.70
				120	1.375	244.20	79.10
				140	1.562	274.30	75.30
				160	1.781	308.50	70.90
20"	500	20	508
				5S	0.188	39.80	131.00
				10S	0.218	46.10	130.20
				10 (LW)	0.250	52.70	129.30
				20/STD	0.375	78.60	126.00
				30/XS	0.500	104.10	122.80
				40	0.593	122.90	120.40
				60	0.812	166.40	114.80
				80	0.937	208.90	109.40
				100	1.281	256.10	103.40
				120	1.500	296.40	98.30
				140	1.750	341.09	92.60
				160	1.968	379.10	87.80
22"	550	22	559
				10 (LW)	0.250	58.10	129.30
				STD	0.375	86.60	153.60
				XS	0.500	114.80	150.00
24"	600	24	610
				5S	0.218	55.40	188.80
				10 (LW)/10S	0.250	63.40	187.80
				20/STD	0.375	94.60	183.80
				XS	0.500	125.50	179.90
				30	0.562	140.70	178.00
				40	0.687	171.10	174.10
				60	0.968	238.10	165.60
				80	1.218	296.40	158.10
				100	1.531	367.40	149.10
				120	1.812	429.40	141.20
				140	2.062	483.20	134.30
				160	2.343	542.00	126.90
26"	650	26	650
				STD	0.375	102.60	216.80
				XS	0.500	136.20	212.50
28"	700	28	711
				STD	0.375	110.70	252.50
				XS	0.500	146.90	247.90
30"	750	30	762
				5S	0.250	79.40	296.00
				10 (LW)/10S	0.312	98.90	293.50
				STD	0.375	118.70	291.00
				20/XS	0.500	157.60	286.00
				30	0.625	196.10	281.10
32"	800	32	813
				STD	0.375	126.70	332.10
				XS	0.500	168.20	326.80
34"	850	34	864
				STD	0.375	134.70	376.00
				XS	0.500	178.90	370.30
36"	900	36	914
				STD	0.375	142.70	422.60
				XS	0.500	189.60	416.60
42"	1050	42	1067
				STD	0.375	166.70	578.70
				XS	0.500	221.60	571.70
48"	1200	48	1219
				STD	0.375	190.80	252.50
				XS	0.500	253.70	247.90

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What does IPS Size Mean for Pipe or Tube?

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