GOST 17375-2001 Ct20 elbows

Manufacturer of GOST 17375-2001 Ct20 Sharply Curved Elbows

GOST 17375-2001

GOST 17375-2001. Carbon and low-alloy steel butt-welding fittings. Sharply curved bends type 3D (R=1,5 DN). Design

The standard applies to seamless welded bends of carbon and low-alloyed steel of type 3D with an R approximately equal to 1.5 DN and angles equal to 45 °, 60 °, 90 ° and 180 °, made of pipes by methods of punching or broaching over a horn-shaped core.

Стандарт распространяется на бесшовные приварные отводы из углеродистой и низколегированной стали типа 3D с R приблизительно равным 1,5 DN и углами равными 45°, 60°, 90° и 180°, изготавливаемые из труб методами штамповки или протяжки по рогообразному сердечнику.

Specifications

Standard: GOST 17375-2001
Radius: R = 1.5 × D (where D = nominal pipe diameter)
Angles Available: 45°, 90°, 180° bends
Nominal Sizes: DN 15–DN 800
Materials:
- Carbon Steel: St20 (CT-20), 09G2S
- Stainless Steel: 12X18H10T (AISI 321), 08X18H10 (AISI 304)
- Alloy:15X5M

Chemical composition in % for grade Ct 20 ( 20 )

C	Si	Mn	Ni	S	P	Cr	Cu	As
0.17 – 0.24	0.17 – 0.37	0.35 – 0.65	max 0.3	max 0.04	max 0.035	max 0.25	max 0.3	max 0.08

Mechanical properties grade CT 20 ( 20 )

Assortment	Dimension	Direct.	s_в	s_T	d₅	y	KCU	Heat treatment
–	mm	–	MPa	MPa	%	%	kJ / m²	–
Sheet heat-treatment, GOST 4041-71	4 – 14		340-490		28
Pipe hot strain, GOST 550-75			431	255	22	50	780
Pipe, GOST 8731-87			412	245	21

GOST 17375 Elbow Dimension

Typical size:108x4mm,133×4, 159×6 mm,219x8mm,720x12mm, etc

DN	D	T	F = R	H	C	B	Mass, kg (Outlet Angle θ)
							45°	90°	180°
15	21.3	2	28	14	56	38	0.02	0.04	0.08
		3.2					0.03	0.06	0.12
		4					0.04	0.07	0.14
20	26.9	2	29	14	58	43	0.03	0.06	0.11
		3.2					0.04	0.08	0.17
		4					0.06	0.1	0.2
25	33.7	2.3	38	18	76	56	0.05	0.11	0.21
		3.2					0.08	0.16	0.32
		4.5					0.09	0.19	0.38
32	42.4	2.6	48	23	96	69	0.1	0.19	0.39
		3.6					0.13	0.26	0.52
		5					0.17	0.35	0.6
40	48.3	2.6	57	29	114	82	0.13	0.26	0.53
		3.6					0.18	0.36	0.72
		5					0.24	0.47	0.95
50	60.3	2.9	76	35	152	106	0.25	0.5	0.99
		4					0.33	0.67	1.3
		5.6					0.5	0.89	1.8
65	76.1	2.9	95	44	190	133	0.4	0.79	1.6
		5					0.72	1.5	2.9
		7.1					0.9	1.8	3.6
80	88.9	3.2	114	51	228	159	0.6	1.2	2.4
		5.6					1	2.1	4.1
		8					1.4	2.8	5.7
100	114.3	3.6	152	64	304	210	1.2	2.4	4.7
		6.3					2	4	8
		8.8					2.8	5.4	11
125	139.7	4	190	79	380	260	2	4	8
		6.3					3.1	6.2	12
		10					4.8	9.6	19
150	168.3	4.5	229	95	457	313	3.2	6.5	13
		7.1					5.1	10	20
		11					7.7	15	31
200	219.1	6.3	305	127	610	414	8	16	32
		8					9.9	20	40
		12.5					14	31	61
250	273	6.3	381	159	762	518	12	25	50
250	273	10	381	159	762	518	19	39	78
300	323.9	7.1	457	190	914	619	20	40	80
300	323.9	10	457	190	914	619	28	56	111
350	355.6	8	533	222	1066	711	24	57	114
350	355.6	11	533	222	1066	711	39	78	156
400	406.4	8.8	610	254	1220	813	41	82	165
400	406.4	12.5	610	254	1220	813	58	117	234
450	457	10	686	286	1372	914	59	119	237
500	508	11	762	318	1524	1016	81	162	323
600	610	12.5	914	381	1828	1219	133	266	531
700	711	—	1067	444	2134	1422	—	—	—
800	813	—	1219	507	2238	—	—	—	—
900	914	—	1372	570	2744	—	—	—	—
1000	1016	—	1524	634	3048	—	—	—	—

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