GOST 23270-89

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  ГОСТ 23270-89

GOST 23270−89 (ISO 2938−74) Tubes-billets for mechanical treatment. Specifications

GOST 23270−89
(ISO 2938−74)

Group В62

INTERSTATE STANDARD

TUBES-BILLETS FOR MECHANICAL TREATMENT

Specifications

Tubes-billets for mechanical treatment.
Specifications

ISS 77.140.60
OKP 13 1900

Date of introduction 1991−01−01

INFORMATION DATA

1. DEVELOPED AND INTRODUCED by the Ministry of ferrous metallurgy of the USSR

DEVELOPERS

E. A. Bliznyuki, PhD. tech. Sciences; V. P. Sokurenko, PhD. tech. Sciences (head of subject); V. N. Rivne, PhD. tech. Sciences; G. A. Gorovenko, PhD. tech. Sciences; A. A. Levitsky

2. APPROVED AND put INTO EFFECT by Decision of the USSR State Committee for standards from 28.06.89 N 2145

3. REPLACE GOST 23270−78

4. The standard corresponds to the international standard ISO 2938−74 in terms of the limit deviation for diameter and wall thickness, the curvature of the pipe, length of pipe, the technological parameters

5. REFERENCE NORMATIVE AND TECHNICAL DOCUMENTS

The designation of the reference document referenced	Item number
GOST 8.051−81	4.11
GOST 427−75	4.10
GOST 1050−88	2.1
GOST 1778−70	2.2.13
GOST 4543−71	2.1
GOST 5639−82	2.2.4
GOST 7565−81	4.3
GOST 8026−92	4.10
GOST 8328−75	4.10
GOST 8732−78	1.6
GOST 8734−75	1.6
GOST 9012−59	4.6
GOST 10006−80	4.4, 4.5
GOST 10243−75	4.7
GOST 10692−80	2.3, 5.1
GOST 12344−2003	4.3
GOST 12345−2001	4.3
GOST 12346−78	4.3
GOST 12347−77	4.3
GOST 12348−78	4.3
GOST 12349−83	4.3
GOST 12350−78	4.3
GOST 12351−81*	4.3
______________ * Standards 12351−2003. — Note the CODE.
GOST 12352−81	4.3
GOST 12353−78	4.3
GOST 12354−81	4.3
GOST 12355−78	4.3
GOST 12356−81	4.3
GOST 12357−84	4.3
GOST 12358−2002	4.3
GOST 12359−99	4.3
GOST 12360−82	4.3
GOST 12361−2002	4.3
GOST 12362−79	4.3
GOST 12363−79	4.3
GOST 12364−84	4.3
GOST 12365−84	4.3
GOST 14959−79	2.1
GOST 17410−78	4.8
GOST 18360−93	4.11
GOST 18365−93	4.11
GOST 18895−97	4.3
GOST 19281−89	2.1
GOST 22536.0−87	4.3
GOST 22536.1−88	4.3
GOST 22536.2−87	4.3
GOST 22536.3−88	4.3
GOST 22536.4−88	4.3
GOST 22536.5−87	4.3
GOST 22536.6−88	4.3
GOST 22536.14−88	4.3
GOST 24853−81	4.11
THAT 2−034−225−87	4.10

6. Limitation of actions taken by Protocol No. 5−94 of the Interstate Council for standardization, Metrology and certification (ICS 11−12−94)

7. REISSUE


This standard applies to steel seamless hot-deformed and cold-deformed pipe billet of carbon and alloy steels used for the manufacture of products by machining.

1. ASSORTMENT

1.1. Pipe is manufactured from the outside diameter, wall thickness and length.

1.2. Dimensions and weight of 1 m of pipes shall be as specified in table.1 for hot-deformed pipes in the table.2 — for cold pipes.

Table 1

Outside — tion diameter, mm	Weight of 1 m of hot-deformed tubes for the nominal sizes in the symmetric limit deviations, kg, at wall thickness, mm
	2,5	2,8	3	3,5	4	4,5	5	5,5	6	6,5	7	7,5	8
42	-	-	2,89	3,32	3,75	4,16	4,56	4,95	Of 5.33	-	-	-	-
45	-	-	3,11	3,58	Of 4.04	4,49	4,93	5,36	5,77	6,17	6,56	-	-
50	-	-	3,48	Of 4.01	4,54	5,05	5,55	Of 6.04	Of 6.51	Of 6.97	7,42	7,86	8,29
54	-	-	3,77	4,36	4,93	5,49	Of 6.04	Of 6.58	7,10	Of 7.61	8,11	8,60	Of 9.08
57	-	-	Of 4.00	4.62 a	Of 5.23	5,83	Of 6.41	6,99	7,55	8,10	8,63	9,16	Of 9.67
60	-	-	4,22	4,88	5,52	6,16	Of 6.78	7,39	7,99	8,58	9,15	Of 9.71	Of 10.26
63,5	-	-	4,48	5,18	5,87	6,55	7,21	7,87	8,51	9,14	9,75	10,36	10,95
68	-	-	-	5,57	6,31	Of 7.05	Of 7.77	8,48	9,17	9,86	Of 10.53	11,19	Of 11.84
70	-	-	-	5,74	Of 6.51	7,27	8,02	8,75	9,47	Of 10.18	Of 10.88	Of 11.56	12,23
73	-	-	-	6,00	Of 6.81	7,60	Of 8.39	9,16	9,91	10,66	11,39	12,12	Of 12.82
76	-	-	-	6,26	7,10	Of 7.94	8,76	9,56	10,36	11,14	11,91	12,67	13,42
83	-	-	-	6,86	7,79	Of 8.71	9,62	10,51	11,39	12,26	13,12	13,96	14,80
89	-	-	-	Of 7.38	Of 8.39	Of 9.38	10,36	Of 11.33	12,28	Of 13.23	14,16	Of 15.07	15,98
95	-	-	-	7,90	Of 8.98	Of 10.04	11,10	12,14	13,17	14,19	15,19	16,18	17,16
102	-	-	-	8,50	Of 9.67	10,82	11,96	Of 13.09	Of 14.21	15,31	16,40	Of 17.48	18,55
108	-	-	-	-	Of 10.26	11,49	12,70	13,90	Of 15.09	16,27	17,44	To 18.59	19 and 73
114	-	-	-	-	10,85	12,15	Of 13.44	14,72	15,98	17,23	18,47	19,70	20 and 91
121	-	-	-	-	11,54	12,93	14,30	Of 15.67	Of 17.02	18,35	19,68	20,99	22,29
127	-	-	-	-	12,13	13,60	15,04	16,48	17,90	For 19.32	Of 20.72	22,10	23,48
133	-	-	-	-	The 12.73	14,26	15,78	Of 17.29	To 18.79	20,28	21,75	Of 23.21	Of 24.66
140	-	-	-	-	-	15,04	16,65	18,24	Of 19.83	21,40	22,96	24,51	26,04
146	-	-	-	-	-	15,70	17,39	19,06	Of 20.72	22 and 36	24,00	Of 25.62	27,23
152	-	-	-	-	-	Of 16.37	Of 18.13	19,87	21,60	Of 23.32	25,03	26,73	28,41
159	-	-	-	-	-	17,15	Of 18.99	20,82	22,64	24,45	26,24	To 28.02	Of 29.79
168	-	-	-	-	-	-	-	22,04	Of 23.97	25,89	27,79	29,69	31,57
180	-	-	-	-	-	-	-	23,67	25,75	Of 27.81	29,87	Of 31.91	From 33.93
194	-	-	-	-	-	-	-	-	27,82	30,06	Of 32.28	34,50	Of 36.70
203	-	-	-	-	-	-	-	-	29,15	31,50	33,84	Of 36.16	38,47
219	-	-	-	-	-	-	-	-	31,52	34,06	36,60	Of 39.12	41,63
245	-	-	-	-	-	-	-	-	-	-	Of 41.09	43,93	46,76
273	-	-	-	-	-	-	-	-	-	-	-	-	52,28
299	-	-	-	-	-	-	-	-	-	-	-	-	57,41
325	-	-	-	-	-	-	-	-	-	-	-	-	Of 62.54

Extension table 1

External diameter, mm	Weight of 1 m of hot-deformed tubes for the nominal sizes in the symmetric limit deviations, kg, at wall thickness, mm
	8,5	9	9,5	10	11	12	13	14	15	16	17	18
42	-	-	-	-	-	-	-	-	-	-	-	-
45	-	-	-	-	-	-	-	-	-	-	-	-
50	-	-	-	-	-	-	-	-	-	-	-	-
54	-	-	-	-	-	-	-	-	-	-	-	-
57	10,17	10,65	11,13	At 11.59	12,48	Of 13.32	Of 14.11	-	-	-	-	-
60	10,80	To 11.32	11,83	Of 12.33	Of 13.29	Of 14.21	Of 15.07	15,88	-	-	-	-
63,5	11,53	12,10	12,65	13,19	14,24	15,24	16,19	17,09	-	-	-	-
68	12,47	13,10	13,71	14,30	And 15.46	Accounting period 16.57	17,63	Of 18.64	19,61	Of 20.52	-	-
70	12,89	13,54	14,17	14,80	16,01	17,16	18,27	By 19,33	20,35	21,31	-	-
73	13,52	Of 14.21	14,88	15,54	16,82	Of 18.05	Of 19.24	20,37	Of 21.46	22,49	23,48	24,42
76	14,15	14,87	15,58	16,28	17,63	Of 18.94	20,20	21,41	22,57	23,68	Of 24.74	25,75
83	15.62 min	16,43	17,22	18,00	19,53	21,01	Of 22.44	23,82	25,16	Of 26.44	Of 27.67	The 28.85
89	Of 16.88	17,76	18,63	19,48	Loss of 21.16	22,70	24,37	25,90	27,37	28,81	30.19 mm	31,52
95	Of 18.13	Of 19.09	20,03	20, and 96	Of 22.79	Of 24.56	26,29	27,97	29,59	31,17	32,70	34,18
102	19,60	20,64	Of 21.67	22,69	24,69	26,63	28,53	30,38	32,18	From 33.93	Of 35.64	37,29
108	20,86	Of 21.97	At 23.08	24,17	26,31	28,41	Of 30.46	Of 32.46	34,40	36,30	38,15	39,95
114	Of 22.12	From 23.31	24,48	25,65	27,94	30.19 mm	Of 32.38	34 to 53	36,62	Of 38.67	40,67	42,62
121	23,58	24,86	26,12	27,37	Of 29.84	32,26	To 34.62	36,84	39,21	41,43	43,60	And 45.72
127	24,84	26,19	27,53	The 28.85	31,47	34,03	36,55	39,01	41,43	43,80	46,12	48,39
133	26,10	27,52	28,93	30,33	33,10	35,81	38,47	Of 41.09	43,65	46,17	From 48.63	51,05
140	27,57	A 29.08	30,57	Of 32.06	35,00	37,88	40,72	Of 43.50	Of 46.24	48,93	51,57	54,16
146	28,82	30,41	31,98	As 33.54	36,62	39,66	42,64	Of 45.57	48,46	From 51.30	54,08	56,82
152	30,08	31,74	33,39	35,02	38,25	41,43	44,56	47,65	50,68	53,66	56,60	59,48
159	31 to 55	33,29	35,03	Of 36.75	40,15	Of 43.50	46,81	50,06	53,27	56,43	59,53	62,59
168	Of 33.44	35,29	37,13	38,97	42,59	46,17	49,69	53,17	56,60	59,98	63,31	66,59
180	35,95	37,95	39,95	41,93	Of 45.85	49,72	53,54	57,31	61,04	Of 64.71	68,34	71,91
194	Of 38.89	From 41.06	43,23	45,38	49,64	Of 53.86	58,03	62,15	66,22	70,24	74,21	78,13
203	From 40.77	43,06	43,33	47,60	52,09	56,52	60,91	Of 65.25	69,55	73,79	77,98	82,12
219	44,13	Of 46.61	Of 49.08	51,54	56,43	61,26	66,04	70,78	75,46	80,10	84,69	89,23
245	49,58	52,38	55,17	57,95	63,48	68,95	74,38	79,76	85,08	90,36	95,59	100,77
273	55,45	58,60	61,73	64,86	71,07	77,24	83,36	89,42	95,44	101,41	107,33	113,20
299	60,90	64,37	67,83	71,27	78,13	84,93	91,69	98,40	Of 105.06	111,67	118,23	124,74
325	66,35	70,14	Of 73.92	77,68	To RUB 85.18	92,63	100,03	107,38	114,68	121,93	129,13	136,28

Extension table 1

Outside — tion diameter, mm	Weight of 1 m of hot-deformed tubes for the nominal sizes in the symmetric limit deviations, kg, at wall thickness, mm
	19	20	22	24	25	26	28	30	32	34	35	36
42	-	-	-	-	-	-	-	-	-	-	-	-
45	-	-	-	-	-	-	-	-	-	-	-	-
50	-	-	-	-	-	-	-	-	-	-	-	-
54	-	-	-	-	-	-	-	-	-	-	-	-
57	-	-	-	-	-	_	-	-	-	-	-	-
60	-	-	-	-	-	-	-	-	-	-	-	-
63,5	-	-	-	-	-	-	-	-	-	-	-	-
68	-	-	-	-	-	-	-	-	-	-	-	-
70	-	-	-	-	-	-	-	-	-	-	-	-
73	25,30	-	-	-	-	-	-	-	-	-	-	-
76	26,71	-	-	-	-	-	-	-	-	-	-	-
83	Of € 29.99	-	-	-	-	-	-	-	-	-	-	-
89	32,80	34,03	36,35	38,47	-	-	-	-	-	-	-	-
95	35,61	36,99	39,61	42,02	-	-	-	-	-	-	-	-
102	Of 38.89	Of 40.45	43,40	46,17	-	-	-	-	-	-	-	-
108	Of 41.70	43,40	Of 46.66	49,72	Of 51.17	52,58	55,24	-	-	-	-	-
114	44,51	46,36	49,92	53,27	54,87	56,43	59,39	-	-	-	-	-
121	47,79	49,82	53,71	57,41	59,19	60,91	64,22	-	-	-	-	-
127	50,61	52,78	56,97	60,96	Of 62.89	64,76	68,36	71,77	-	-	-	-
133	53,42	55,74	60,22	64,51	66,58	68,61	72,51	76,20	79,71	-	-	-
140	56,70	59,19	64,02	68,66	70,90	73,10	77,34	Of 81.38	85,23	Of 88.88	90,63	Of 92.33
146	Of 59.51	62,15	67,28	72,21	74,60	76,94	81,48	85,82	89,97	93,91	95,81	97,66
152	62,32	65,11	71,53	75,76	78,30	80,79	85,63	90,26	94,70	Of 98.94	100,99	102,99
159	65,60	68,56	74.33 USD	79,90	82,62	85,28	90,46	95,44	100,22	104,81	107,03	109,20
168	69,82	Of 73.00	79,21	85,23	88,16	91,05	96,67	Of 102.10	107,33	112,36	114,80	Of 117.19
180	75,44	78,92	85,72	Of 92.33	95,56	98,75	Of 104.96	110,98	116,80	122,42	125,16	127,85
194	Of 82.00	85,82	93,32	100,62	104,20	107,72	114,63	121,34	127,85	134,16	137,24	140,28
Two hundred three	86,22	90,26	98,20	105,95	109,74	113,49	120,84	127,99	134,95	141,71	145,01	148,27
219	93,71	98,15	106,88	115,42	119,61	123,75	131,89	139,83	147,57	155,12	158,82	162,47
245	105,90	110,98	120,99	130,80	135,64	140,42	149,84	159,07	168,09	176,92	181,26	185,55
273	119,02	124,79	136,18	147,38	152,90	Of 158, 38	169,18	179,78	190,19	200,40	205,43	210,41
299	131,20	137,61	150,29	162,77	168,93	175,05	187,13	199,02	210,71	222,20	227,87	233,50
325	143,38	150,44	164,39	178,16	184,96	191,72	205,09	218,25	231,23	Of 244.00	250,31	256,58

Extension table 1

External diameter, mm	Weight of 1 m of hot-deformed tubes for the nominal sizes in the symmetric limit deviations, kg, at wall thickness, mm
	38	40	42	45
42	-	-	-	-
45	-	-	-	-
50	-	-	-	-
54	-	-	-	-
57	-	-	-	-
60	-	-	-	-
63,5	-	-	-	-
68	-	-	-	-
70	-	-	-	-
73	-	-	-	-
76	-	-	-	-
83	-	-	-	-
89	-	-	-	-
95	-	-	-	-
102	-	-	-	-
108	-	-	-	-
114	-	-	-	-
121	-	-	-	-
127	-	-	-	-
133	-	-	-	-
140	-	-	-	-
146	-	-	-	-
152	-	-	-	-
159	-	-	-	-
168	121,83	126,27	130,51	136,50
180	133,07	138,10	142,94	149,82
194	146,19	151,92	157,44	165,36
203	154,63	160,79	166,76	175,34
219	169,62	176,58	183,33	193,10
245	193,99	202,22	210,26	221,95
273	220,23	229,85	239,27	253,03
299	244,59	255,49	266,20	281,88
325	268,96	281,14	293,13	310,74

1.3. The size of the tubes-workpieces for subsequent machining should be selected based on the size of the finished product, in accordance with the application. The estimated size is rounded up to the nearest standard according to the table.1 and 2.

Table 2

Outside — tion diameter, mm	Weight of 1 m cold-deformed tubes for the nominal sizes in the symmetric limit deviations kg, at wall thickness, mm
	5,0	5,5	6,0	6,5	7,0	7,5	8,0	8,5	9,0	9,5	10	11	12	14	16	18	20	22
30	3,083	3,323	3,551	3,767	3,971	4,162	4,340	-	-	-	-	-	-	-	-	-	-	-
32	3,329	3,594	3,847	4,087	4,316	4,531	4,735	-	-	-	-	-	-	-	-	-	-	-
34	3,576	3,866	4,143	4,408	4,661	4,901	5,129	-	-	-	-	-	-	-	-	-	-	-
35	3,699	4,001	4,291	4,568	4,834	5,086	5,327	-	-	-	-	-	-	-	-	-	-	-
36	3,822	4,137	4,439	4,728	5,006	5,271	5,524	-	-	-	-	-	-	-	-	-	-	-
38	4,069	4,408	4,735	5,049	5,352	5,641	5,919	6,184	6,437	-	-	-	-	-	-	-	-	-
40	4,316	4,680	5,081	5,369	5,697	6,011	6,313	6,603	6,881	-	-	-	-	-	-	-	-	-
42	4,562	4,951	5,327	5,690	6,042	6,381	6,700	7,023	7,324	-	-	-	-	-	-	-	-	-
45	4,932	5,358	5,771	6,171	Susan: 6.560	6,936	7,300	7,651	7,990	8,317	8,632	-	-	-	-	-	-	-
48	5,302	5,765	6,215	6,652	7,078	7,491	7,892	8,280	8,656	9,020	9,371	-	-	-	-	-	-	-
50	5,549	6,036	6,511	6,972	7,423	7,861	8,286	8,699	9,110	9,489	9,865	10,580	11,246	-	-	-	-	-
51	5,672	6,172	6,659	7,132	7,596	8,046	8,484	8,909	9,322	9,723	10,111	10,851	11,542	-	-	-	-	-
53	5,919	Of 6, 443	6,955	7,453	7,941	8,416	8,878	9,328	9,766	10,191	10,604	11,394	12,133	-	-	-	-	-
54	6,042	6,578	7,108	7,613	8,114	8,601	9,075	9,538	9,988	10,426	10,851	11,655	12,429	-	-	-	-	-
56	6,289	6,850	7,398	7,934	8,459	8,971	9,470	9,957	10,432	10,894	11,345	12,207	13,021	-	-	-	-	-
57	6,412	6,985	7,546	8,095	8,632	9,156	9,667	10,167	10,654	11,128	11,591	12,479	13,317	-	-	-	-	-
60	6,782	7,392	7,990	8,575	9,149	9,710	10,259	10,796	11,320	11,831	Twelve thousand three hundred thirty one	13,293	14,205	-	-	-	-	-
63	-	7,799	8,434	9,056	9,667	10,265	10,851	11,424	11,985	12,534	13,070	14,106	15,093	-	-	-	-	-
65	-	8,070	8,730	9,377	10,013	10,635	11,246	11,844	12,429	13,003	13,564	14,649	15,685	-	-	-	-	-
68	-	8,477	9,174	9,857	10,530	11,190	11,838	12,473	13,095	13,706	14,304	15,463	16,573	-	-	-	-	-
70	-	-	9,470	10,178	10,876	11,560	12,232	12,892	13,539	14,174	14,797	16,005	17,164	-	-	-	-	-
73	-	-	9,914	10,659	11,394	12,115	12,824	13,521	14,205	14,877	15,537	16,819	18,052	-	-	-	-	-
75	-	-	-	10,980	11,739	Make 12 485	13,219	13,940	14,649	15,345	16,030	17,362	18,644	-	-	-	-	-
76	-	-	-	11,140	11,911	12,670	13,416	14,150	14,871	15,580	16,276	17,633	18,940	-	-	-	-	-
80	-	-	-	-	12,602	13,410	14,205	14,988	15,759	16,517	17,263	18,718	20,124	-	-	-	-	-
83	-	-	-	-	13,120	13,965	14,797	15,617	16,425	17,220	18,003	19,532	21,012	-	-	-	-	-
85	-	-	-	-	13,465	14,334	15,191	16,036	16,868	17,688	18,496	20,074	21,603	-	-	-	-	-
89	-	-	-	-	-	15,074	15,981	16,875	17,756	18,626	19,486	21,160	22,787	-	-	-	-	-
90	-	-	-	-	-	15,259	16,178	17,084	17,978	18,860	19,729	21,431	23,083	-	-	-	-	-
95	-	-	-	-	-	-	17,164	18,132	19,088	20,031	20,962	22,787	24,563	-	-	-	-	-
100	-	-	-	-	-	-	-	19,180	20,198	21,203	22,192	24,144	26,043	29,692	33,145	36,400	-	-
102	-	-	-	-	-	-	-	19,600	20,642	21,671	22,689	24,686	26,634	30,383	33,934	37,288	-	-
108	-	-	-	-	-	-	-	-	21,973	23,077	24,168	26,314	28,410	32,455	36,302	39,952	-	-
110	-	-	-	-	-	-	-	-	22,417	23,546	24,662	Twenty six thousand eight hundred fifty six	29,002	33,145	37,091	40,839	44,391	47,745
120	-	-	-	-	-	-	-	-	-	-	27,128	29,569	31,961	36,598	41,037	45,278	49,323	53,170

Notes to the table.1, 2:

1. Weight of 1 m pipe is determined by the formula

,

where is the outer diameter expressed in mm;

 — wall thickness, mm.

The density of steel is taken equal to 7,850 (g/cm).

2. In the manufacture of pipes with asymmetric extreme deviation nominal pipe sizes are based on half of the algebraic sum of plus and minus deviations.

1.4. Pipe manufacture:

random lengths from 1.5 to 11.5 m;

lengths from 1.5 to 9 m, with extreme deviations in length +10 mm;

multiple of gauging length within off-gage with an allowance for each cut is 5 mm and the limit deviation for the total length does not exceed specified pipe lengths.

1.5. Length of the measuring pipe with wall thickness more than 16 mm shall be by agreement between manufacturer and consumer.

1.6. Tolerances for outside diameter, wall thickness and deviation along the length of the pipes according to GOST 8732 for hot-deformed pipes GOST 8734 and for cold pipes.

1.7. The curvature of any section of the tube per 1 m of length should not exceed, mm:

1.5 — for pipes with wall thickness up to 20 mm incl.;

2,0 — for pipes with wall thickness over 20 mm to 30 mm incl.;

The 4.0 — for pipes with wall thickness over 30 mm.

In coordination with the consumer the total curvature of tubes shall not exceed 0,0015, where is the length of the pipe, but not more than:

12 mm — for pipes with wall thickness up to 20 mm incl.;

15 mm — for pipes with wall thickness over 20 mm.

1.8. At the request of the consumer pipe is manufactured with an offset field of the limit deviations on size. The value of the offset field of the limit deviations shall not exceed the amount of bilateral deviations. Allowed to produce pipes of other sizes.

Examples of symbols:

Pipe with an outer diameter of 89 mm with a wall thickness of 10 mm, of steel grade 10, random length:

Pipe 89х10 — 10 GOST 23270−89

Same length, a multiple of 350 mm:

Pipe 89х10х350 cu. — 10 GOST 23270−89

The same dimensional length equal to 4000 mm:

Pipe 89x10x4000 — 10 GOST 23270−89

Pipe with an outer diameter of 168 mm and a wall thickness of 13 mm, of steel 38H2MYUA in the heat treated condition of random length:

Pipe 168х13 — 38H2MYUA (T) GOST 23270−89

2. TECHNICAL REQUIREMENTS

2.1. Pipe manufactured in accordance with the requirements of this standard for technological regulations approved in the prescribed manner.

Pipes made from steel grades 10, 20, 35, 45, 30HGSA, 30KHMA, 12KHN2, 38H2MYUA, 10G2, 15X, 20X, 40X, 15KHM with the chemical composition according to GOST 1050, GOST 4543, GOST 14959, GOST 19281.

By agreement with the consumer allowed to manufacture pipes from other steel grades, provided the listed standards.

2.2. Features

2.2.1. Mechanical properties of hot-deformed metal pipe shall be as specified in table.3 and cold-deformed tubes — in table.4.

Table 3

Steel grade	Temporary tear resistance , N/mm(kgf/mm)	Yield strength, N/mm(kgf/mm)	Take tional elongation, %	Brinell hardness number (wall thickness more than 10 mm)
	not less than			Indentation diameter, mm, not less	The number of hardness HB, no more
10	353 (36)	216 (22)	24	5,1	137
20	412 (42)	245 (25)	21	4,8	156
35	510 (52)	294 (30)	17	4,4	187
45	588 (60)	323 (33)	14	4,2	207
30KHGSA	686 (70)	-	11	-	-
30KHMA	588 (60)	392 (40)	13	-	-
12KHN2	539 (55)	392 (40)	14	-	-

Table 4

Steel grade	Temporary tear resistance , N/mm(kgf/mm)	Yield strength, N/mm(kgf/mm)	Take tional elongation, %	Brinell hardness number (wall thickness more than 10 mm)
	not less than			Indentation diameter, mm, not less	The number of hardness HB, no more
10	345 (35)	206 (21)	24	5,1	137
20	412 (42)	245 (25)	21	4,8	156
35	510 (52)	294 (30)	17	4,4	187
45	589 (60)	323 (33)	14	4,2	207
10G2	422 (43)	245 (25)	22	4,3	197
15X	412 (42)	-	19	4,5	179
20X	431 (44)	-	17	4,5	179
40X	618 (63)	-	14	4,1	217
30KHGSA	491 (50)	-	18	4,0	220
15KHM	431 (44)	226 (23)	21	-	-

Note. The yield stress for pipe, steel, 15X, 20X, 40X and 30KHGSA to 01.01.93 not normalized. The definition of the required data set.

2.2.2. Mechanical properties of pipe metal of steel 38H2MYUA, determined on heat-treated samples must meet the requirements specified in table.5.

Table 5

Heat treatment of the sample	Temporary tear resistance , N/mm(kgf/mm)	Take tional elongation,%	The relative narrowing of the wall thickness is more than 5 mm , %	Toughness with a wall thickness of over 12 mm KCU, j/cm(kgf/cm)	Brinell hardness number (wall thickness more than 10 mm)
	not less than				Indentation diameter, mm, not less	The number of hardness HB, no more
Annealing (940±15) °C water or oil, tempering (640±40) °C water or oil	980 (100)	14	50	88,2 (9)	3,4−3,7	321−269

2.2.3. For steel 38H2MYUA production methods stipulated in the order. The metal melted by electroslag remelting, the mass fraction of sulfur should not exceed 0,015%, and the deviation of the mass fraction of silicon allowed is 0.1%.

2.2.4. Grain size of metal pipe steel 38H2MYUA should be no larger than 5 points according to GOST 5639.

2.2.5. On the surface of the pipes is not allowed defects, bringing the wall thickness beyond the minimum limit deviations.

2.2.6. The pipe ends should be trimmed and cleaned of burrs; allowed the formation of a chamfer at their removal. Method of trimming is not regulated.

2.2.7. When cutting pipes with a torch or plasma cutting the stock to length of the pipes should be at least 20 mm for each cut.

2.2.8. In coordination with the consumer pipes are made without trimming the ends. While not cut part of the pipe marked with paint and the weight of the batch is not included.

2.2.9. At the request of the consumer hot-deformed pipes with wall thickness more than 12 mm check on the macrostructure. It should not be traces podnasadochnogo looseness, delamination, cracks, voids, bubbles, bloat, crust, flocs, contaminants and other defects visible without using the magnifying devices.

2.2.10. At the request of the consumer hot tubes of alloyed steel should termoobrabotannyj. Heat treatment regime and norms of mechanical properties determined by agreement between manufacturer and consumer.

2.2.11. At the request of the consumer pipe from steel 38H2MYUA must be heat treated with a hardness of no more than 229 HB (indentation diameter not less than 4 mm).

Allowed production of tubes rolling after heating the hardness is not more than 285 HB (indentation diameter not less than 3.6 mm).

2.2.12. The yield strength and Brinell hardness number of steel pipes, the manufacturer determines at the request of the consumer.

2.2.13. The impurity of metal hot-deformed tubes made from rolled billets, non-metallic inclusions by the maximum score should not exceed the limits specified in table.6.

Table 6

Steel grade	Contamination of the metal pipes according to the points (GOST 1778), not more
	conventional smelting	electroslag remelting
38H2MYUA
the oxides or silicates	4,0	3,0
sulphides	3,5	2,0
30KHGSA, 30KHMA, 12KHN2
for oxides and silicates	4,5	-
sulphides	4,5	-

2.2.14. At the request of the consumer pipe is subjected to flaw detection.

2.3. Labeling and packaging — according to GOST 10692 with the additional indication of grain size and contamination of the metal pipes, non-metallic inclusions.

3. ACCEPTANCE RULES

3.1. The pipe presented to the receiving parties. The party should consist of pipes of the same size, one steel, one kind of heat treatment (in the manufacture of pipes in thermally treated condition) and, at the request of the consumer, one melting and accompanied by a document about quality that contains:

trademark or the name and trademark of manufacturer;

the lot number or melt;

the chemical composition of the metal pipes (on customer requirement);

the symbol of the pipes;

the total length of pipes and number of pipes in pieces;

the weight of the batch;

the results of the tests;

the value of the yield strength for steel grades 15X, 20X, 40 and 30KHGSA;

stamp of technical control Department.

3.2. The number of tubes in the party should be.:

400 — for pipes with a diameter less than 76 mm;

200 for pipes of other diameters.

3.3. Checking the external and internal surfaces and sizes, as well as flaw detection (if the requirements of paragraph 2.2.14) is subjected to each pipe of the party.

3.4. The chemical composition of the steel take on the document about the quality of the manufacturer of the workpiece.

3.5. For testing of tubes in tension and to control the microstructure of the party selected by the two tubes for each test.

If the party five or more pipes, select a pipe.

To control the hardness of selected 2% of tubes (but at least two of the party).

3.6. If unsatisfactory test results of at least one indicator thereon, a second test of the doubled sample from the same batch. The results of repeated tests spread to the entire party.

Allowed the manufacturer to conduct routine inspection of the tubes.

4. TEST METHODS

4.1. For each test, except test macrostructure and hardness, from each selected pipe cut out one sample. To control the macrostructure of the samples taken from both ends of the pipe, and for pipe diameters greater than 299 mm with a wall thickness of 30 mm and more — from one end of the pipe. To determine the number of samples allowed to apply statistical methods of control.

4.2. Inspection of pipes is carried out visually. The depth of the defects check adproval or otherwise. Allowed to control the geometric dimensions and surface quality of the pipes with special devices.

4.3. Chemical analysis of steel pipe is carried out according to GOST 22536.0 to GOST 22536.1−22536.6 GOST, GOST 12344−12365 GOST, GOST 22536.14, GOST 18895.

To determine the chemical composition of the steel samples are taken according to GOST 7565.

Allowed to apply other methods of analysis, ensuring accuracy in accordance with specified standards. The differences in the evaluation of product quality the chemical composition analysis is carried out according to specified standards.

4.4. The tensile test is carried out according to GOST 10006 on the longitudinal proportionate short sample. Test speed up to yield strength should be not more than 10 mm/min, yield point is not more than 40 mm/min.

4.5. Allowed to control the mechanical properties of pipes non-destructive methods. The differences in the assessment of the quality tests carried out according to GOST 10006.

4.6. The hardness test is carried out according to GOST 9012 on both ends of the pipe.

Allowed to determine the hardness of the specimens intended for the tensile test and the macrostructure.

Allowed to control hardness non-destructive methods. In the event of dispute, the test performed according to GOST 9012.

4.7. Macrostructure of the metal pipes checked for ProTrainer cross ring sample in accordance with GOST 10243.

4.8. Pipe shall be subjected to flaw detection by nondestructive methods according to normative-technical documentation.

When using the ultrasonic pulse echo method of flaw detection inspection of the tubes is carried out according to GOST 17410.

The control metal on volosovichi for steel 38H2MYUA carried out according to normative-technical documentation.

4.9. Control the length of the pipes lengths and dimensional performed by means of measurement, measurement error not exceeding ±2 mm for pipes up to 6 m, not more than ±3 mm for pipes longer than 6 m and not more than ±10 mm for pipes of random length.

4.10. Control the curvature of the pipes is carried out with a straight edge according to GOST 8026 or GOST 8328и probe on the other 2−034−225.

At the request of the consumer, they control the total curvature of the pipe. The scope and frequency of monitoring are established by the manufacturer. Control the total curvature of the pipe is carried out using taut strings and the measuring ruler according to GOST 427.

4.11. Control of the outer diameter and wall thickness of pipes is carried out by measuring the error of measurement which shall meet the requirements of GOST 8.051.

Allowed to control the outer diameter of the caliber-brackets with the Executive dimensions according to GOST 18360, 18365 GOST, GOST 24853.

5. TRANSPORTATION AND STORAGE

5.1. Transportation and storage — by GOST 10692.

APPLICATION (recommended). SELECTION OF RATIONAL SIZES OF TUBES-WORKPIECES FOR FABRICATION OF CYLINDRICAL PRODUCTS BY MACHINING

APP
Recommended

1. The choice of pipe sizes-blanks is determined by the method of processing by centering the pipe on the outer or inner diameters.

2. For centering the pipe with the outside diameter dimensions — outer diameterand wall thickness associated with the size of the pipe outer diameter and wall thickness and their tolerances and the following dependencies:

3. For centering hot tubes at the inner diameter measuring the inner diameter and wall thickness associated with the size of the pipe internal diameter and wall thickness and their tolerances and and the following dependencies:

________________
* Formulas correspond to the original. — Note the CODE.

Designations:

, ,  — nominal external diameters and wall thickness of pipe, mm;

 — pipe length, m;

, , ,  — the negative and positive tolerances on outside diameter and wall thickness of pipe in fractions of a unit;

 — the coefficient that is selected as the table, depending on the specified reliability, expressed as a decimal;

the curve of the pipe of 1 m length according to GOST, mm.