Steel Pipe Specifications and Sizes: A Complete Chart

May 17, 2024 Roberto Magalhães

1. Steel tube dimensions

An inch is divided into eight equal parts: 1/8, 1/4, 3/8, 1/2, 5/8, 3/4, 7/8 inch.

They correspond to what are commonly called 1/8 to 7/8 tube sizes.

Smaller dimensions are represented by 1/16, 1/32, 1/64, with the unit still being in inches. If the denominator and numerator can be reduced (for example, when the numerator is 2, 4, 8, 16, 32), they should be.

The representation of an inch is marked with two prime symbols in the upper right corner, such as 1/2″.

For example, a DN25 water pipe (25mm and equal below) is equivalent to a 1″ imperial water pipe, which is also the old 8-part water pipe. A DN15 water pipe is equivalent to a 1/2″ imperial water pipe, which is also the old 4-part water pipe. A DN20 water pipe is equivalent to a 3/4″ imperial water pipe, which is also the old 6-part water pipe.

Dimensions: DN15 (4-part tube), DN20 (6-part tube), DN25 (1 inch tube), DN32 (1 and 2 inch tube), DN40 (1 and a half inch tube), DN50 (2 - inch pipe), DN65 (2 and a half inch pipe), DN80 (3 inch pipe), DN100 (4 inch pipe), DN125 (5 inch pipe), DN150 (6 inch pipe), DN200 (pipe 8 inch pipe), DN250 (10 inch pipe) and so on.

The specifications of steel pipes have imperial and international standards.

2. Specifications and models of steel pipes

mm	mm	mm	^cm2	kg/m	l ² /m	cm ⁴	^cm3	cm
30×2	30	two	1,759	1,381	0.094	1,730	1.15	0.99
30×2.5	30	2.5	2,160	1,695	0.094	2,060	1.37	0.98
34×2	34	two	2011	1,578	0.107	2,580	1.52	1.13
34×2.5	34	2.5	2,474	1,942	0.107	3,090	1.82	1.12
38×2	38	two	2,262	1,776	0.119	3,680	1.94	1.28
38×2.5	38	2.5	2,788	2,189	0.119	4,410	2.32	1.26
38×3	38	3	3,299	2,589	0.119	5,090	2.68	1.24
38×3.5	38	3.5	3,793	2,978	0.119	5,700	3:00	1.23
40×2	40	two	2,388	1,874	0.126	4,320	2.16	1.35
40×2.5	40	2.5	2,945	2,312	0.126	5,200	2.60	1.33
42×2	42	two	2,513	1973	0.132	5,040	2:40 am	1.42
42×2.5	42	2.5	3,102	2,435	0.132	6,070	2.89	1.40
42×3	42	3	3,676	2,885	0.132	7,030	3.35	1.38
42×3.5	42	3.5	4,233	3,323	0.132	7,910	3.77	1.37
42×4	42	4	4,775	3,749	0.132	8,710	4.15	1.35
45×2	45	two	2,702	2,121	0.141	6,260	2.78	1.52
45×2.5	45	2.5	3,338	2,620	0.141	7,560	3.36	1.50
45×3	45	3	3,958	3,107	0.141	8,770	3.90	1.49
45×3.5	45	3.5	4,563	3,582	0.141	9,890	4:40 am	1.47
45×4	45	4	5,152	4,044	0.141	10,930	4.86	1.46
50×2.5	50	2.5	3,731	2,929	0.157	10,550	4.22	1.68
50×3	50	3	4,430	3,477	0.157	12,280	4.91	1.67
50×3.5	50	3.5	5,113	4,014	0.157	13,900	5.56	1.65
50×4	50	4	5,781	4,538	0.157	15,410	6.16	1.63
50×4.5	50	4.5	6,432	5,049	0.157	16,810	6.72	1.62
50×5	50	5	7,069	5,549	0.157	18,110	7.24	1.60
51×2	51	two	3,079	2,417	0.160	9,260	3.63	1.73
51×2.5	51	2.5	3,809	2,990	0.160	11,230	4:40 am	1.72
51×3	51	3	4,524	3,551	0.160	13,080	5.13	1.70
51×3.5	51	3.5	5,223	4,100	0.160	14,810	5.81	1.68
54×2	54	two	3,267	2,565	0.170	11,060	4.10	1.84
54×2.5	54	2.5	4,045	3,175	0.170	13,440	4.98	1.82
54×3	54	3	4,807	3,773	0.170	15,680	5.81	1.81
54×3.5	54	3.5	5,553	4,359	0.170	17,790	6.59	1.79
54×4	54	4	6,283	4,932	0.170	19,760	7.32	1.77
54×4.5	54	4.5	6,998	5,493	0.170	21,610	8:00 am	1.76
54×5	54	5	7,697	6,042	0.170	23,340	8.64	1.74
57×2	57	two	3,456	2,713	0.179	13,080	4.59	1.95
57×2.5	57	2.5	4,280	3,360	0.179	15,930	5.59	1.93
57×3	57	3	5,089	3,995	0.179	18,610	6.53	1.91
57×3.5	57	3.5	5,883	4,618	0.179	21,140	7.42	1.90
57×3	57	3	5,089	3,995	0.179	23,520	8:25 am	2.15
57×4.5	57	4.5	7,422	5,826	0.179	25,760	9.04	1.86
57×4	57	4	6,660	5,228	0.179	27,860	9.78	2.05
57×5.5	57	5.5	8,899	6,985	0.179	29,840	10:47 am	1.83
60×2	60	two	3,644	2,861	0.188	15,340	5.11	2.05
60×2.5	60	2.5	4,516	3,545	0.188	18,700	6.23	2.03
60×3	60	3	5,372	4,217	0.188	21,880	7.29	2.02
60×3.5	60	3.5	6,212	4,877	0.188	24,880	8.29	2:00
60×4	60	4	7,037	5,524	0.188	27,730	9.24	1.99
60×4.5	60	4.5	7,846	6,159	0.188	30,410	10.14	1.97
60×5	60	5	8,639	6,782	0.188	32,940	10.98	1.95
60×5.5	60	5.5	9,417	7,392	0.188	35,320	11.77	1.94
60×6	60	6	10,179	7,990	0.188	37,560	12.52	1.92
63.5×2	63	two	3,833	3,009	0.198	18,290	5.81	2.18
63.5×2.5	63	2.5	4,752	3,730	0.198	22,320	7.09	2.17
63.5×3	63	3	5,655	4,439	0.198	26,150	8:30 am	2.15
63.5×3.5	63	3.5	6,542	5,136	0.198	29,790	9:46 am	2.13
63.5×4	63	4	7,414	5,820	0.198	33,240	10:55 am	2.12
63.5×4.5	63	4.5	8,270	6,492	0.198	36,500	11:59	2.10
63.5×5	63	5	9,111	7,152	0.198	39,600	12.57	2.08
63.5×5.5	63	5.5	9,935	7,799	0.198	42,520	1:50 p.m.	2.07
63.5×6	63	6	10,744	8,434	0.198	45,280	2:37 p.m.	2.05
68×3	68	3	6,126	4,809	0.214	32,420	9.54	2:30 p.m.
68×3.5	68	3.5	7,092	5,567	0.214	36,990	10.88	2.28
68×4	68	4	8,042	6,313	0.214	41,340	12.16	2.27
68×4.5	68	4.5	8,977	7,047	0.214	45,470	1:37 p.m.	2.25
68×5	68	5	9,896	7,768	0.214	49,410	14.53	2.23
68×5.5	68	5.5	10,799	8,477	0.214	53,140	15.63	2.22
68×6	68	6	11,687	9,174	0.214	56,680	16.67	2.20
70×2	70	two	4,273	3,354	0.220	24,720	7.06	2.41
70×2.5	70	2.5	5,301	4,162	0.220	30,230	8.64	2.39
70×3	70	3	6,315	4,957	0.220	35,500	10.14	2.37
70×3.5	70	3.5	7,312	5,740	0.220	40,530	11.58	2.35
70×4	70	4	8,294	6,511	0.220	45,330	12:95	2.34
70×4.5	70	4.5	9,260	7,269	0.220	49,890	2:25 p.m.	2.32
70×5	70	5	10,210	8,015	0.220	54,240	3:50 p.m.	2:30 p.m.
70×5.5	70	5.5	11,145	8,749	0.220	58,380	16.68	2.29
70×6	70	6	12,064	9,470	0.220	62,310	5:80 p.m.	2.27
70×7	70	7	13,854	10,876	0.220	69,580	19.88	2.24
73×3	73	3	6,597	5,179	0.229	40,480	11.09	2.48
73×3.5	73	3.5	7,642	5,999	0.229	46,260	12.67	2.46
73×4	73	4	8,671	6,807	0.229	51,780	14.19	2.44
73×4.5	73	4.5	9,684	7,602	0.229	57,040	15.63	2.43
73×5	73	5	10,681	8,385	0.229	62,070	17.01	2.41
73×5.5	73	5.5	11,663	9,156	0.229	66,870	6:32 p.m.	2.39
73×6	73	6	12,629	9,914	0.229	71,430	7:57 p.m.	2.38
73×7	73	7	14,514	11,394	0.229	79,920	9:90 p.m.	2.35
76×2	76	two	4,650	3,650	0.239	31,850	8.38	2.62
76×2.5	76	2.5	5,773	4,532	0.239	39,030	10.27	2.60
76×3	76	3	6,880	5,401	0.239	45,910	12.08	2.58
76×3.5	76	3.5	7,972	6,258	0.239	52,500	13.82	2.57
76×4	76	4	9,048	7,103	0.239	58,810	3:48 p.m.	2.55
76×4.5	76	4.5	10,108	7,935	0.239	64,850	17.07	2.53
76×5	76	5	11,153	8,755	0.239	70,620	6:58 p.m.	2.52
76×5.5	76	5.5	12,182	9,562	0.239	76,140	20.04	2.50
76×6	76	6	13,195	10,358	0.239	81,410	9:42 p.m.	2.48
76×7	76	7	15,174	11,912	0.239	91,230	24.01	2.45
83×2	83	two	5,089	3,995	0.261	41,760	10.06	2.86
83×2.5	83	2.5	6,322	4,963	0.261	51,260	12:35 p.m.	2.85
83×3	83	3	7,540	5,919	0.261	60,400	2:55 p.m.	2.83
83×3.5	83	3.5	8,741	6,862	0.261	69,190	16.67	2.81
83×4	83	4	9,927	7,793	0.261	77,640	18.71	2.80
83×4.5	83	4.5	11,098	8,712	0.261	85,760	20.67	2.78
83×5	83	5	12,252	9,618	0.261	93,560	22.54	2.76
83×5.5	83	5.5	13,391	10,512	0.261	101,040	24:35	2.75
83×6	83	6	14,514	11,394	0.261	108,220	26.08	2.73
83×7	83	7	16,713	13,120	0.261	121,690	29.32	2.70
83×8	83	8	18,850	14,797	0.261	134,040	32:30	2.67
89×2	89	two	5,466	4,291	0.280	51,750	11.63	3.08
89×2.5	89	2.5	6,794	5,333	0.280	63,590	2:29 p.m.	3.06
89×3	89	3	8,105	6,363	0.280	75,020	16.86	3.04
89×3.5	89	3.5	9,401	7,380	0.280	86,050	7:34 p.m.	3.03
89×4	89	4	10,681	8,385	0.280	96,680	21.73	3.01
89×4.5	89	4.5	11,946	9,378	0.280	106,920	24.03	2.99
89×5	89	5	13,195	10,358	0.280	116,790	26.24	2.98
89×5.5	89	5.5	14,428	11,326	0.280	126,290	28.38	2.96
89×6	89	6	15,645	12,281	0.280	135,430	30:43	2.94
89×7	89	7	18,033	14,156	0.280	152,670	34.31	2.91
89×8	89	8	20,358	15,981	0.280	168,590	37.89	2.88
95×2	95	two	5,843	4,587	0.298	63,200	1:31 p.m.	3.29
95×2.5	95	2.5	7,265	5,703	0.298	77,760	4:37 p.m.	3.27
95×3	95	3	8,671	6,807	0.298	91,830	7:33 p.m.	3.25
95×3.5	95	3.5	10,061	7,898	0.298	105,450	10:20 p.m.	3.24
95×4	95	4	11,435	8,977	0.298	118,600	24.97	3.22
95×4.5	95	4.5	12,794	10,043	0.298	131,310	27.64	3.20
95×5	95	5	14,137	11,098	0.298	143,580	30.23	3.19
95×5.5	95	5.5	15,464	12,140	0.298	155,430	32.72	3.17
95×6	95	6	16,776	13,169	0.298	166,860	35.13	3.15
95×7	95	7	19,352	15,191	0.298	188,510	39.69	3.12
95×8	95	8	21,865	17,164	0.298	208,620	43.92	3.09
102×2	102	two	6,283	4,932	0.320	78,570	3:41 p.m.	3.54
102×2.5	102	2.5	7,815	6,135	0.320	96,770	18.97	3.52
102×3	102	3	9,331	7,324	0.320	114,420	10:44 pm	3.50
102×3.5	102	3.5	10,831	8,502	0.320	131,520	25.79	3.48
102×4	102	4	12,315	9,667	0.320	148,090	29.04	3.47
102×4.5	102	4.5	13,784	10,820	0.320	164,140	32.18	3.45
102×5	102	5	15,237	11,961	0.320	179,720	35.24	3.43
102×5.5	102	5.5	16,674	13,089	0.320	194,720	38.18	3.42
102×6	102	6	18,096	14,205	0.320	209,280	41.04	3:40 am
102×7	102	7	20,892	16,400	0.320	236,960	46.46	3.37
102×8	102	8	23,625	18,545	0.320	262,830	51.54	3.34
102×10	102	10	28,903	22,689	0.320	309,400	60.67	3.27
108×3	108	3	9,896	7,768	0.339	136,490	25.28	3.71
108×3.5	108	3.5	11,490	9,020	0.339	157,020	29.08	3.70
108×4	108	4	13,069	10,259	0.339	176,950	32.77	3.68
108×4.5	108	4.5	14,632	11,486	0.339	196,300	36.35	3.66
108×5	108	5	16,179	12,701	0.339	215,060	39.83	3.65
108×5.5	108	5.5	17,711	13,903	0.339	233,260	43.20	3.63
108×6	108	6	19,227	15,093	0.339	250,910	46.46	3.61
108×7	108	7	22,211	17,436	0.339	284,580	52.70	3.58
108×8	108	8	25,133	19,729	0.339	316,170	58.55	3.55
108×10	108	10	30,788	24,168	0.339	373,450	69.16	3.48
114×3	114	3	10,462	8,212	0.358	161,240	28.29	3.93
114×3.5	114	3.5	12,150	9,538	0.358	185,630	32.57	3.91
114×4	114	4	13,823	10,851	0.358	209,350	36.73	3.89
114×4.5	114	4.5	15,480	12,152	0.358	232,410	40.77	3.87
114×5	114	5	17,122	13,441	0.358	254,810	44.70	3.86
114×5.5	114	5.5	18,747	14,717	0.358	276,580	48.52	3.84
114×6	114	6	20,358	15,981	0.358	297,730	52.23	3.82
114×7	114	4	13,823	10,851	0.358	338,190	59.33	4.95
114×8	114	8	26,641	20,913	0.358	376,300	66.02	3.76
114×10	114	10	32,673	25,648	0.358	445,820	78.21	3.69
121×3	121	3	11,121	8,730	0.380	193,690	32.01	4.17
121×3.5	121	3.5	12,920	10,142	0.380	223,170	36.89	4.16
121×4	121	4	14,703	11,542	0.380	251,870	41.63	4.14
121×4.5	121	4.5	16,470	12,929	0.380	279,830	46.25	4.12
121×5	121	5	18,221	14,304	0.380	307,050	50.75	4.11
121×5.5	121	5.5	19,957	15,666	0.380	333,540	55.13	4.09
121×6	121	6	21,677	17,016	0.380	359,320	59.39	4.07
121×7	121	7	25,070	19,680	0.380	408,800	67.57	4.04
121×8	121	8	28,400	22,294	0.380	455,570	75:30	4.01
121×10	121	10	34,872	27,374	0.380	541,430	89.49	3.94
127×3	127	3	11,687	9,174	0.399	224,750	35.39	4.39
127×3.5	127	3.5	13,580	10,660	0.399	259,110	40.80	4.37
127×4	127	4	15,457	12,133	0.399	292,610	46.08	4.35
127×4.5	127	4.5	17,318	13,595	0.399	325,290	51.23	4.33
127×5	127	5	19,164	15,044	0.399	357,140	56.24	4.32
127×5.5	127	5.5	20,994	16,480	0.399	388,190	61.13	4:30 p.m.
127×6	127	6	22,808	17,904	0.399	418,440	65.90	4.28
127×7	127	7	26,389	20,716	0.399	476,630	75.06	4.25
127×8	127	8	29,908	23,478	0.399	531,800	83.75	4.22
127×10	127	10	36,757	28,854	0.399	633,550	99.77	4.15
127×12	127	12	43,354	34,033	0.399	724,500	114.09	4.09
133×4	133	4	16,211	12,725	0.418	337,530	50.76	4.56
133×4.5	133	4.5	18,166	14,261	0.418	375,420	56.45	4.55
133×5	133	5	20,106	15,783	0.418	412,400	62.02	4.53
133×5.5	133	5.5	22,030	17,294	0.418	448,500	67.44	4.51
133×6	133	6	23,939	18,792	0.418	483,720	72.74	4.50
133×7	133	7	27,709	21,751	0.418	551,580	82.94	4.46
133×8	133	8	31,416	24,662	0.418	616,110	92.65	4.43
133×10	133	10	38,642	30,334	0.418	735,590	110.62	4.36
133×12	133	12	45,616	35,809	0.418	843,040	126.77	4:30 p.m.
140×4	140	4	17,090	13,416	0.440	395,470	56.50	4.81
140×4.5	140	4.5	19,156	15,037	0.440	440,120	62.87	4.79
140×5	140	5	21,206	16,647	0.440	483,760	69.11	4.78
140×5.5	140	5.5	23,240	18,243	0.440	526,400	75.20	4.76
140×6	140	6	25,258	19,828	0.440	568,060	81.15	4.74
140×7	140	7	29,248	22,960	0.440	648,510	92.64	4.71
140×8	140	8	33,175	26,043	0.440	725,210	103.60	4.68
140×10	140	10	40,841	32,060	0.440	867,860	123.98	4.61
140×12	140	12	48,255	37,880	0.440	996,950	142.42	4.55
140×14	140	14	55,418	43,503	0.440	1113.340	159.05	4.48
146×5	146	5	22,148	17,386	0.459	551,100	75.49	4.99
146×5.5	146	5.5	24,277	19,057	0.459	599,950	82.18	4.97
146×6	146	6	26,389	20,716	0.459	647,730	88.73	4.95
146×7	146	7	30,568	23,996	0.459	740,120	101.39	4.92
146×8	146	8	34,683	27,226	0.459	828,410	113.48	4.89
146×10	146	10	42,726	33,540	0.459	993,460	136.09	4.82
146×12	146	12	50,517	39,656	0.459	1142.940	156.57	4.76
146×14	146	14	58,057	45,574	0.459	1278,700	175.16	4.69
152×5	152	5	23,091	18,126	0.478	624,430	82.16	5:20 am
152×5.5	152	5.5	25,313	19,871	0.478	680,060	89.48	5.18
152×6	152	6	27,520	21,603	0.478	734,520	96.65	5.17
152×7	152	7	31,887	25,031	0.478	839,990	110.53	5.13
152×8	152	8	36,191	28,410	0.478	940,970	123.81	5.10
152×10	152	10	44,611	35,019	0.478	1129,990	148.68	5.03
152×12	152	12	52,779	41,431	0.478	1302.580	171.39	4.97
152×14	152	14	60,696	47,646	0.478	1459.730	192.07	4.90
159×5	159	5	24,190	18,989	0.500	717,880	90:30	5.45
159×6	159	6	28,840	22,639	0.500	845,190	106.31	5.41
159×7	159	7	33,427	26,240	0.500	967,410	121.69	5.38
159×8	159	8	37,950	29,791	0.500	1084,670	136.44	5.35
159×10	159	10	46,810	36,746	0.500	1304.880	164.14	5.28
159×12	159	12	55,418	43,503	0.500	1506,880	189.54	5.21
159×14	159	14	63,774	50,063	0.500	1691,690	212.79	5.15
168×5	168	5	25,604	20,099	0.528	851,140	101.33	5.77
168×6	168	6	30,536	23,971	0.528	1003.120	119.42	5.73
168×7	168	7	35,406	27,794	0.528	1149.360	136.83	5.70
168×8	168	8	40,212	31,567	0.528	1290.010	153.57	5.66
168×10	168	10	49,637	38,965	0.528	1555.130	185.13	5.60
168×12	168	12	58,811	46,166	0.528	1799,600	214.24	5.53
168×14	168	14	67,733	53,170	0.528	2024.530	241.02	5.47
168×16	168	16	76,404	59,977	0.528	2230.980	265.59	5:40 am
180×5	180	5	27,489	21,579	0.565	1053.170	117.02	6.19
180×6	180	6	32,798	25,747	0.565	1242,720	138.08	6.16
180×7	180	7	38,045	29,865	0.565	1425.630	158.40	6.12
180×8	180	8	43,228	33,934	0.565	1602.040	178.00	6.09
180×10	180	10	53,407	41,925	0.565	1936.010	215.11	6.02
180×12	180	12	63,335	49,718	0.565	2245.840	249.54	5.95
180×14	180	14	73,011	57,313	0.565	2532.740	281.42	5.89
180×16	180	16	82,435	64,712	0.565	2797.860	310.87	5.83
194×5	194	5	29,688	23,305	0.609	1326.540	136.76	6.68
194×6	194	6	35,437	27,818	0.609	1567.210	161.57	6.65
194×7	194	7	41,123	32,282	0.609	1800.080	185.58	6.62
194×8	194	8	46,747	36,696	0.609	2025.310	208.79	6.58
194×10	194	10	57,805	45,377	0.609	2453.550	252.94	6.51
194×12	194	12	68,612	53,861	0.609	2853.250	294.15	6:45 am
194×14	194	14	79,168	62,147	0.609	3225.710	332.55	6.38
194×16	194	16	89,473	70,236	0.609	3572.190	368.27	6.32
194×18	194	18	99,526	78,128	0.609	3893.940	401.44	6.25
203×6	203	6	37,134	29,150	0.638	1803.070	177.64	6.97
203×8	203	8	49,009	38,472	0.638	2333.370	229.89	6.90
203×10	203	10	60,633	47,597	0.638	2830.720	278.89	6.83
203×12	203	12	72,005	56,524	0.638	3296.490	324.78	6.77
203×14	203	14	83,127	65,254	0.638	3732.070	367.69	6.70
203×16	203	16	93,996	73,787	0.638	4138.780	407.76	6.64
203×18	203	18	104,615	82,123	0.638	4517.930	445.12	6.57
219×6	219	6	40,150	31,517	0.688	2278.740	208.10	7.53
219×8	219	8	53,030	41,629	0.688	2955.430	269.90	7.47
219×10	219	10	65,659	51,543	0.688	3593.290	328.15	7:40 am
219×12	219	12	78,037	61,259	0.688	4193.810	383.00	7.33
219×14	219	14	90,164	70,779	0.688	4758,500	434.57	7.26
219×16	219	16	102,039	80,101	0.688	5288.810	483.00	7:20 am
219×18	219	18	113,663	89,225	0.688	5786.150	528.42	7.13
219×20	219	20	125,035	98,153	0.688	6251.930	570.95	7.07
245×7	245	7	52,339	41,086	0.770	3709.060	302.78	8.42
245×8	245	8	59,565	46,758	0.770	4186.870	341.79	8.38
245×10	245	10	73,827	57,955	0.770	5105.630	416.79	8.32
245×12	245	12	87,839	68,954	0.770	5976.670	487.89	8:25 am
245×14	245	14	101,599	79,755	0.770	6801.680	555.24	8.18
245×16	245	16	115,108	90,360	0.770	7582.300	618.96	8.12
245×18	245	18	128,365	100,767	0.770	8320.170	679.20	8.05
245×20	245	20	141,372	110,977	0.770	9016.860	736.07	7.99
273×8	273	8	66,602	52,282	0.858	5851.710	428.70	9:37 am
273×10	273	10	82,624	64,860	0.858	7154.090	524.11	9:31 am
273×12	273	12	98,395	77,240	0.858	8396.140	615.10	9.24
273×14	273	14	113,914	89,423	0.858	8579.750	628.55	8.68
273×16	273	16	129,182	101,408	0.858	10706.790	784.38	9:10 am
273×18	273	18	144,199	113,196	0.858	11779.080	862.94	9.04
273×20	273	20	158,965	124,787	0.858	12798.440	937.61	8.97
299×8	299	8	73,136	57,412	0.939	7747.420	518.22	10/29
299×10	299	10	90,792	71,272	0.939	9490.150	634.79	10.22
299×12	299	12	108,196	84,934	0.939	11159.520	746.46	10.16
299×14	299	14	125,350	98,399	0.939	12757.610	853.35	10.09
299×16	299	16	142,251	111,667	0.939	14286.480	955.62	10.02
299×18	299	18	158,902	124,738	0.939	15748.160	1053.39	9.96
299×20	299	20	175,301	137,611	0.939	17144.640	1146.80	9.89

3. Specifications and dimensions of steel pipe

Nominal diameter	Inches	Welded tube	Seamless pipe
DN6	1∕8	10
DN8	1∕4	13.5	14
DN10	3∕8	17	18
DN15	1∕2	9:25 p.m.	22
DN20	3∕4	26.75	25
DN25	1	33.5	32
DN32	1 1/4	42.25	42
DN40	1 1/2	48	48
DN50	two	60	57
DN65	2 1/2	75.5	74
DN80	3″	88.5	89
DN100	4″	114	108
DN125	5″	140	133
DN150	6″	165	159
DN175	7″	194	194
DN200	8″	219	219
DN225	9″	245	245
DN250	10″	273	273
DN300	12″	325	325
DN350	14″	377	377
DN400	16″	426	426
DN450	18″	478	478
DN500	20″	529	529
DN600	24″	630	630
DN700	28″	720	720
DN800	32″	820	820