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90 Degree Carbon Steel Elbow

90 Degree Carbon steel elbow is a pipe fitting with a 90 degree bending angle. It connects two pipes and changes the direction of the pipes at right angles, ensuring that the fluid flows along a predetermined path in the pipe system.

ASTM A105 Weldolet

Content

Carbon steel material itself has high strength and can withstand greater pressure and weight. In high-pressure pipeline systems, carbon steel 90-degree elbows can ensure the safe operation of pipelines and prevent elbows from breaking or deforming due to excessive pressure. Carbon steel has good high temperature resistance and can maintain its mechanical properties stable within a certain temperature range.

Specification of ASME B16.9 90 Degree Elbow Fitting

Size Range	1/2″ – 80″ / DN15 – 2000
Thickness Schedule	SCH 10, 20, 40, STD, XS, 80, 100, 120, 140, 160, XXS
Standard	ANSI / ASME B16.9, MSS SP 43, JIS B2311/2312/2313, EN10253
Butt Weld	ASTM A234 WPB/WPC, A420 WPL6, A860 WPHY 42 / 46 / 56 / 60 / 65
Socket Weld and Threaded	ASTM A105 / A105N, ASTM A350 LF2/LF3, A694 F42 / 46 / 56 / 60 / 65

ASME B16.11 Threaded Elbow Dimensions

Nominal Size		Center-to-End				Outside Diameter of Band		Wall Thickness		Length of Thread
DN	NPS	A				H		Gmin		L 5 min	L 2 min
		90°Elbows		45°Elbows		H		Gmin
		3000	6000	3000	6000	3000	6000	3000	6000
6	1/8	21	25	17	19	22	25	3.18	6.35	6.4	6.7
8	1/4	25	28	19	22	25	33	3.30	6.60	8.1	10.2
10	3/8	28	33	22	25	33	38	3.51	6.98	9.1	10.4
15	1/2	33	39	25	28	38	46	4.09	8.15	10.9	13.6
20	3/4	38	44	28	33	46	56	4.32	8.53	12.7	13.9
25	1	44	51	33	35	56	62	4.98	9.93	14.7	17.3
32	11/4	51	60	35	43	62	75	5.28	10.59	17.0	18.0
40	11/2	60	64	43	44	75	84	5.56	11.07	17.8	18.4
50	2	64	83	44	52	84	102	7.14	12.09	19	19.2
65	21/2	83	95	52	64	102	121	7.65	15.29	23.6	28.9
80	3	95	106	64	79	121	146	8.84	16.64	25.9	30.5
100	4	114	114	79	79	152	152	11.18	18.67	27.7	33

Butt Weld 90 Degree Elbow Dimensions

DN	NPS	OD	A
DN	NPS	OD	LR	SR
15	1/2	21.3	38	25
20	3/4	26.7	38	25
25	1	33.4	38	25
32	1-1/4	42.2	48	32
40	1-1/2	48.3	57	38
50	2	60.3	76	51
65	2-1/2	73.0	95	64
80	3	88.9	114	76
90	3-1/2	101.6	133	89
100	4	114.3	152	102
125	5	141.3	190	127
150	6	168.3	229	152
200	8	219.1	305	203
250	10	273.0	381	254
300	12	323.8	457	305
350	14	355.6	533	356
550	22	559.0	838	559
600	24	610.0	914	610
650	26	660.0	991	660
700	28	711.0	1067	711
750	30	762.0	1143	762
800	32	813.0	1219	813
850	34	864.0	1295	864
900	36	914.0	1372	914
950	38	965.0	1447	965
1000	40	1016.0	1524	1016
1050	42	1067.0	1600	1067
1100	44	1118.0	1676	1118
1150	46	1168.0	1753	1168
1200	48	1219.0	1829	1219
1300	52	1321.0	1981	1321
1400	56	1422.0	2134	1422
1500	60	1524.0	2286	1524
1600	64	1626.0	2438	1626
1700	68	1727.0	2591	1727
1800	72	1829.0	2743	1829
1900	76	1930.0	2896	1930
2000	80	2032.0	3048	2032

Classification of Carbon Steel Elbows

Classification by Manufacturing Process
Seamless elbows: Made from seamless steel pipes through hot pushing, stamping and other processes. The hot pushing process is to heat the steel pipe to a certain temperature and then push it into shape through a mold; the stamping process is to use a stamping machine to stamp the steel plate into the shape of an elbow. Seamless elbows have the advantages of uniform wall thickness, high strength, and high pressure resistance. They are often used in high-pressure, high-temperature, and highly corrosive pipeline systems, such as pipelines in the petroleum, chemical, and natural gas industries.
Welded elbows: Multiple components are welded together using a welding process. Usually, the steel plate is cut into a fan shape, and then the elbow is made through processes such as bending and welding. The production process of welded elbows is simple and the cost is low. It is suitable for low-pressure and normal temperature pipeline systems, such as building water supply and drainage, fire protection pipelines, etc.
Classification by connection method
Butt-welded elbows: Connected to the pipeline by welding. The pipe mouth of the butt-welded elbow is the same as the outer diameter of the pipeline. When welding, the elbow and the pipeline are welded together. The weld strength is high and the sealing is good. It is suitable for pipeline systems with high pressure, high temperature, flammable and explosive media.
Socket welding elbow: one end is a socket and the other end is a spigot, which is connected to the pipe by socket welding. Socket welding elbow is easy to install and is suitable for small-diameter, low-pressure pipeline systems. It is often used in instrumentation, chemical equipment and other fields.
Threaded elbow: The pipe mouth is threaded and connected to the pipe by threaded connection. Threaded elbow is easy to install and disassemble, does not require welding equipment, and is suitable for low-pressure, normal temperature pipeline systems, such as household water pipes, air conditioning pipes, etc.

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