The biggest difference between national standard pipe fittings and American standard pipe fittings_Industry News_Hebei Longsheng Pipeline Equipment Co.,Ltd.

The biggest difference between national standard pipe fittings and American standard pipe fittings

Author：Longsheng Pipeline 　Source：HEBEI LONGSHENG PIPELINE EQUIPMENT CO., LTD　 Views：687　Updated：2024-01-01

The biggest difference between national standard pipe fittings and American standard pipe fittings is: caliber.

The American standard is the domestic often said A series and the national standard is the B series, For example, the elbow :DN100*6, the nominal diameter is DN100, the national standard DN100 outer diameter is 108MM, the thickness is 6MM, the American standard DN100 refers to the inch is 4 ', the outer diameter is 114.3MM, the thickness is also 6MM, and the American standard elbow length is slightly longer than the national standard.

It is also said that the same nominal diameter of pipe fittings (including elbow, tee, size head, pipe cap), the caliber size of national standard pipe fittings and American standard pipe fittings is not the same.

Nominal size inch	inch	Nominal diameter DN	GB/A	GB/B	ASTM	JIS
1/8"		6			10.3
1/4"		8			13.7
3/8"		10			17.1
1/2"	0.840	15	21.3	18	21.3
3/4"	1.050	20	26.9	25	26.7	27.2
1"	1.315	25	33.7	32	33.4	34
11/4"	1.660	32	42.4	38	42.2	42.7
11/2"	1.900	40	48.3	45	48.3	48.6
2"	2.375	50	60.3	57	60.3	60.5
21/2"	2.875	65	76.1	76	73.0	76.3
3"	3.500	80	88.9	89	88.9	89.1
31/2"		90			101.6	101.6
4"	4.500	100	114.3	108	114.3	114.3
5"	5.563	125	139.0	133	141.3	139.80
6"	6.625	150	168.3	159	168.3	165.20
8"	8.625	200	219.1	219	219.1	216.30
10"	10.750	250	273.0	273	273.1	267.40
12"	12.750	300	323.9	325	323.9	318.50
14"	14.000	350	355.6	377	355.6	355.60
16"	16.000	400	406.4	426	406.4	406.40
18"	18.000	450	457.0	478	457.2	457.20
20"	20.000	500	508.0	529	508.0	508.00
22"	22.000	550	559.0		558.8	558.00
24"	24.000	600	610.0	630	609.6	609.60
26"	26.000	650	660.0		660.4	660.40
28"	28.000	700	711.0	720	711.2	711.20
30"	30.000	750	762.0		762.0	762.00
32"	32.000	800	813.0	820	812.8	812.80
34"	34.000	850	864.0		863.6	863.60
36"	36.000	900	914.0	920	914.4	914.40
38"	38.000	950	965.0		965.2	965.20
40"	40.000	1000	1016.0	1020	1016.0	1016.00
42"	42.000	1050	1067.0		1066.8	1066.80
44"	44.000	1100	1118.0	1120	1117.6	1117.60
46"	46.000	1150	1168.0		1168.4	1168.40
48"	48.000	1200	1219.0	1220	1219.2	1219.20

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