GOST 9731-79

• gost-9731-79.pdf (445.32 KiB)
  ГОСТ 9731-79

GOST 9731−79 seamless steel Cylinders large volume of gases at R®

The title of the document:	GOST 9731−79 seamless steel Cylinders large volume of gases at R®
Document number:	9731−79
Document type:	GOST
Accepted on:	Gosstandart of the USSR
Status:	Current
Published:	M.: Publishing house of standards, 1994 the official publication of the
Date of adoption:	November 30, 1979
Effective date:	January 01, 1981
Date revised:	01 Aug 2002

GOST 9731−79

Group В66

STATE STANDARD OF THE USSR


SEAMLESS STEEL CYLINDERS LARGE
VOLUME FOR GASES of 24.5 MPa (250 kgf/cm)

Specifications

Steel seamless cylinders of large capacity for gases
for 24,5 MPa (250 kgf/cm).
Specifications

OKP 117,000 was

Date of introduction 1981−01−01
in terms of clause 2.2 1985−01−01

INFORMATION DATA

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

DEVELOPERS:

E. A. Bliznyuki, PhD. tech. Sciences; M. Bernstein, PhD. tech. Sciences; Litvinsky Y. I., Cand. tech. Sciences; S. G. Belik; Barinova T. V., Cand. tech. Sciences.

2. APPROVED AND put INTO EFFECT by Decision of the USSR State Committee for standards from 30.11.79 N 4605

3. REPLACE GOST 9731−61

4. REFERENCE NORMATIVE AND TECHNICAL DOCUMENTS

The designation of the reference document referenced	Item number
GOST 9.032−74	2.15
GOST standard 9.402−80	2.15
GOST 1050−88	2.14
GOST 1497−84	4.2
GOST 2016−86	4.6
GOST 5791−81	5.2
GOST 7931−76	5.2
GOST 9012−59	4.4
GOST 9150−81	2.11; 2.14
GOST 9399−81	4.6
GOST 9454−78	4.2
GOST 14192−77	5.5 and
GOST 15150−69	5.5; 5.6
GOST 16093−81	2.11; 2.14
GOST 24705−81	2.11; 2.14

5. Limitation of actions taken by the decision of the Interstate Council for standardization, Metrology and certification (ICS 2−93).

6. REPRINT (may 1994) with Amendments No. 1, 2 approved in December 1985, and June 1990 (IUS 4−86, 10−90)


AMENDED* published in IUS N 8, 2002
___________________
The amendment is effective only on the territory of the Russian Federation. — Note the manufacturer’s database.

An amendment made by the manufacturer of the database


This standard applies to tanks made of carbon steel and alloy steel, is manufactured from seamless pipe and is designed for storage and transportation of compressed and liquefied gases at ambient temperatures from minus 50 to plus 60 °C. safety Requirements for products described in paragraphs.1.2, 1.3, 2.3, 2.7, 4.1−4.5, 4.8.

(Amendment. ICS N 8−2002).

1. THE TYPES, BASIC PARAMETERS AND DIMENSIONS

1.1. Cylinders shall be manufactured to the following specifications:

1 — odnogolosy internally threaded with a spherical bottom (Fig.1);

2 — dvuhgolosyj with internal thread (damn.2);

3 — odnogolosy with external thread and a flange with a spherical bottom (Fig.3);

4 — dvuhgolosyj with male threads and with flanges (Fig.4).

1.2. Main parameters and sizes of cylinders shall be as specified in the hell.1−4 and in table.1 (for cylinders made of carbon steel) and table.2 (for cylinders of alloyed steel).

Damn.1−4

Damn.1	Damn.2	Damn.3	Damn.4

Table 1

The volume of a cylinder , l	The outer diameter type- cal part , mm	The length of the body of cylinders nominal , mm				The wall thickness of cylinders , mm				The mass of the cylinders , kg
Working pressure , MPa (kgf/cm)
9,8 (100)	Of 14.7 (150)	19,6 (200)	24,5 (250)	9,8 (100)	Of 14.7 (150)	19,6 (200)	24,5 (250)	9,8 (100)	Of 14.7 (150)	19,6 (200)	24,5 (250)
80	325	1270	1330	1390	1460	6,8	10,0	13,1	16,1	90	130	175	220
377	1040	1080	1130	1180	7,9	11,7	15,2	18,7	100	150	205	250
100	325	1550	1620	1690	1770	6,8	10,0	13,1	16,1	105	155	210	265
377	1230	1290	1340	1420	7,9	11,7	15,2	18,7	115	175	230	290
130	325	1960	2050	2140	2240	6,8	10,0	13,1	16,1	130	190	255	330
377	1530	1600	1700	1760	7,9	11,7	15,2	18,7	140	210	290	360
160	325	2370	Two thousand four hundred seventy	2580	2710	6,8	10,0	13,1	16,1	155	230	310	395
377	1820	1900	2020	2110	7,9	11,7	15,2	18,7	165	250	335	430
200	325	2940	3060	3160	3350	6,8	10,0	13,1	16,1	190	290	375	490
377	2220	2340	2470	2550	7,9	11,7	15,2	18,7	200	305	400	510
250	377	2760	2850	3010	3150	7,9	11,7	15,2	18,7	235	365	480	625
426	2260	2380	2500	2620	9,0	13,2	17,2	21,1	255	375	525	665
320	426	2820	2965	3120	3260	9,0	13,2	17,2	21,1	315	465	650	820
465	2530	2570	2725	2840	9,8	14.4 V	18,8	23,0	400	485	670	840
400	465	3075	3130	Three thousand two hundred forty	3420	9,8	14.4 V	18,8	23,0	480	600	810	1030
500	465	3730	3810	4000	4220	9,8	14.4 V	18,8	23,0	580	725	970	1240

Notes to the table.1−2:

1. According to customer bottles of 80−320 l are manufactured of normal or reduced length. The top row in the table refers to the settings of cylinders of normal length, the lower line is reduced in length.

2. According to customer cylinders can be made dvuhgolosyj with one slitted neckline.

Table 2

The volume of a cylinder , l	The outer diameter type- cal part , mm	The length of the body of cylinders nominal, mm			The wall thickness of cylinders , mm				The mass of the cylinders , kg
Working pressure , MPa (kgf/cm)
Of 14.7 (150)	19,6 (200)	24,5 (250)	Of 14.7 (150)	19,6 (200)	24,5 (250)	Of 14.7 (150)		19,6 (200)	24,5 (250)
80	325	1280	1280	1350	7,0	8,8	10,9	90		110	140
377	1020	1050	1100	7,9	10,2	12,7	100		125	160
One hundred	325	1560	1560	1630	7,0	8,8	10,9	105		130	170
377	1230	1260	1320	7,9	10,2	12,7	115		145	190
130	325	1970	1970	2060	7,0	8,8	10,9	130		165	210
377	1540	1570	1630	7,9	10,2	12,7	140		180	230
160	325	2380	2380	2480	7,0	8,8	10,9	155		195	250
377	1830	1880	1940	7,9	10,2	12,7	165		210	270
200	325	2930	2930	3060	7,0	8,8	10,9	190		240	305
377	2230	2290	2380	7,9	10,2	12,7	200		255	325
250	377	2720	2800	2900	7,9	10,2	12,7	235		305	390
426	2200	2300	2370	9,2	11,5	14,2	255		325	405
320	426	Two thousand seven hundred fifty	2870	2950	9,2	11,5	14,2	315		400	500
465	2550	2550	2610	10,2	13,0	15,6	350		440	540
400	465	2970	3040	3100	10,2	13,0	15,6	415		530	655
500	465	3770	3770	3850	10,2	13,0	15,6	505		640	800

(Changed edition, Rev. N 1, 2).

1.3. Limit deviations should not exceed:

volume… ±5%

the outside diameter of the cylindrical part:

for cylinders made of carbon steel …±1,5%

for cylinders of alloy steel …±2,0%

in places of transition from the cylinder to the sphere… ±2,5%

length (instead of limitations)… ±3%.

1.4. According to customer cylinders from alloy steel must be manufactured with any restrictions on weight. The mass of the cylinder to 1 liter actual volume shall not exceed nominal by more than 10%. When this limit is removed.

Examples of callouts

Container performance 1 200 litres at a pressure of 24.5 MPa (250 kgf/cm) of stainless steel, with a limit of mass for air:

Cylinder for air 1−200−24,5 L-M GOST 9731−79

The same reduced length:

Cylinder for air reduced length 1−200−24,5 L-M GOST 9731−79

Same version 2 carbon steel air:

Cylinder for air 2−200−24,5 GOST 9731−79.

(Changed edition, Rev. N 1).

2. TECHNICAL REQUIREMENTS

2.1. Cylinders must be manufactured in accordance with the requirements of this standard and the «Rules of arrangement and safe operation vessels working under pressure» approved by Gosgortekhnadzor of the USSR, working drawings, approved in the prescribed manner.

2.2. Cylinders must be manufactured from pipes that have passed the ultrasonic inspection.

2.3. The mechanical properties of the material of the cylinders shall not be less than specified in table.3.

Table 3

Name of indicators	Carbon steel	Alloy steel
Temporary resistance , MPa (kgf/mm)	638 (65)	883 (90)
Yield strength , MPa (kgs/mm)	373 (38)	687 (70)
Elongation , %	15	13
The impact strength KCU, j/m(kgf/cm) at temperature:
+20°C	(3)	(6)
-20°C	(2)	-
-50°C	-	(3)

Note. Impact strength at a temperature of minus 20 and minus 50 °C is determined by the float cylinders for each size.

2.4. Ovality of cylinders should be within permissible deviations in outside diameter.

2.5. The outer and inner surfaces of the cylinders shall be without captivity, sinks, laps, cracks.

Elevation, enhancement, risks, and dents from scale or instrument, and other minor defects, including sealed and open lines on the inside of the necks and bottoms, should take the wall thickness of the cylinders for a minimum value specified in table.1 and 2.

2.6. The outer and inner surfaces of the cylinders must be pretreated with, or ottobatcher peskostruy. Allowed scale, fused with the metal and cannot be cleaned and de-coring.

2.7. Cylinders must be heat treated:

carbon steel — normalizing;

alloy steel — quenching and tempering.

The surface hardness of heat-treated cylinders from alloy steel should not be 269−341 NV.

2.6; 2.7. (Changed edition, Rev. N 2).

2.8. Cylinders for oxygen and hydrogen must be degreased. Before installing the valves, the cylinders shall further bezierease the consumer.

2.9. Of a mouth of cylinders with internal thread must be manufactured in accordance with the devil.5 and table.4.

The number of threads with a full profile should be at least 10.

Beyond the minimum length of the threaded portion allowed the internal bore of the neck, not bringing the wall thickness beyond the minimum value.

Damn.5

Damn.5

Table 4

Dimensions, mm

The diameter of the cylinder		not for less pressure, MPa (kgf/cm)		no less
9,8−14,7 (100−150)	Of 19.6 to 24.5 (200−250)	Pred, off. ±0,5
325; 377	M533	70	77	40	62	54	5	5	2
426; 465	M803	105	120	60	92	82	5	5	2,5

(Changed edition, Rev. N 1, 2).

2.10. Of a mouth of cylinders with external threaded flanges shall be manufactured in accordance with the devil.6 and table 5.

Damn.6

Damn.6

Table 5

Dimensions, mm

The diameter of the cylinder			(pred, off. -4)	(PREV. off. +5)	(PREV. off. ±0,5)
325; 377; 426; 465	M1103	98	90	55	5	2,5

2.11. The carving of the necks and flanges — GOST 9150−81 and GOST 24705−81. Limit deviation — according to GOST 16093−81 8g and 7N.

Allowed visiblea and sorlandet thread not more than the total number of turns on the maximum length of the circumference of each stripped round. On the sealing surface nicks and radial risks are not allowed.

(Changed edition, Rev. N 1).

2.12. The flanges to the cylinders must be manufactured from heat-treated blanks (forgings, stampings or rolled sections) in accordance with the devil.7 and table.6.

Damn.7

Damn.7

Table 6

Dimensions, mm

The diameter of the cylinder		(PREV. off. ±0,3)					The number of holes,
pred. off. 14
325; 377; 426; 465	M1103	185	245	55	2,5	1,0	8

Mechanical properties of the material of the flanges, defined on the longitudinal samples is given in table.7.

Table 7

Steel grade	Chemical composition	Tensile strength , N/mm(kgf/mm)	Yield strength , N/mm(kgf/mm)	Elongation , %	The impact strength KCU, j/cm(kgf·m/cm)
Alloy	GOST 4543−71	618 (63)	392 (40)	15	59,6

(Changed edition, Rev. N 1, 2).

2.13. To prevent loosening flanges should be welded to the neck from the side adjacent to the area of the cylinder, or secured with a pin.

2.14. Cylinders must be sealed.

Bottoms odnogolosyj containers shall be welded by electric welding.

Pets instead of welding to cylinders with a diameter of 426 mm and 465 to set the center of the bottom stub screw-M523-M803 with subsequent welding. Plugs shall be made of steel grades 20, 25, 30, 35, 40 and 45 according to GOST 1050−88 height of not less than 25 mm.

Thread goujon — 9150−81 GOST and GOST 24705−81. Limit deviation — 8g according to GOST 16093−81.

(Changed edition, Rev. N 1).

2.15. The outer surface of the cylinders shall be painted with bitumen-oil varnish, oil, enamel, or nitro-according to GOST standard 9.402−80 with 4 th degree of purification. Paint color is selected depending on the fill gas according to table.8. Paint should match the 7-th class according to GOST 9.032−74.

Table 8

The name of the gas	Painting of cylinders
Nitrogen	Black
Ammonia	Yellow
The crude argon	Black
Argon technical	Black
Argon clean	Grey
Acetylene	White
Butylene	Red
Neftegaz	Grey
Bhutan	Red
Hydrogen	Dark green
The air	Black
Helium	Brown
Nitrous oxide	Grey
Oxygen	Blue
Oxygen medical	Blue
Hydrogen sulfide	White
Sulfur dioxide	Black
Carbon dioxide	Black
Phosgene	Protective
Halons	Aluminum or light gray
Chlorine	Protective
Cyclopropane	Orange
Ethylene	Purple
All other combustible gases	Red
All other non-combustible gases	Black

(Changed edition, Rev. N 2).

2.16. Every container has a volume of 100 liters or more should be applied passport in the form prescribed by the Rules of Gosgortechnadzor.

3. ACCEPTANCE RULES

3.1. Each cylinder must be subjected to acceptance tests for compliance with the requirements of paragraphs.1.2; 1.3; 2.3; 2;4; 2.5; 2.6; 2.9; 2.10; 2.11; 2.12; 2.13; 2.14; 2.15; 2.16.

Notes:

1. Test of the cylinder material on tensile and impact bending test on 2 samples from batch.

2. Cylinders with two open necks leak tested at the factory are not exposed.

(Changed edition, Rev. N 1).

3.2. The cylinders apply to the acceptance of batches up to 100 pieces of the same type, one volume, one melting and treatment.

4. TEST METHODS

4.1. Test of the cylinder material on tensile and impact bending (n.2.3) must be performed on longitudinal specimens cut from pipe sections of the same melting, which is made from these cylinders, the last heat treatment together with the cylinders. For each of the selected tests at least two samples from the party.

(Changed edition, Rev. N 1).

4.2. The tensile test should be made in a short proportional specimens of type III according to GOST 1497−84.

4.3. Test the impact strength of cylinders with a wall thickness of from 7 to 12 mm must be carried out on samples of type 3 cylinders with a wall thickness of 12 mm to the samples of type 1 according to GOST 9454−78.

(Changed edition, Rev. N 1).

4.4. Quality control of heat treatment of cylinders (p.2.7) must be carried out by measuring the hardness of the cylinders.

The hardness of the surface of the cylinders is measured according to GOST 9012−59.

4.5. The strength of the test cylinders with hydraulic test and air — tightness of the pneumatic test in accordance with the requirements of «Rules of arrangement and safe operation vessels working under pressure». Duration of pressure test shall be not less than:

15 minutes for cylinders to 14.7 MPa (150 kgf/cm), inclusive;

90 min for cylinders up to 19.6 MPa (200 kgf/cm), inclusive;

120 min — for cylinders with more than 19.6 MPa (200 kgf/cm).

(Changed edition, Rev. N 1, 2).

4.6. The quality of the threads on the necks and flanges (PP.2.9−2.11) check the gauges according to GOST 2016−86. Flanges for cylinders (p.2.12) is tested in accordance with the requirements of GOST 9399−81.

4.7. The quality of external and internal surfaces of the cylinders (PP.2.5; 2.6) to check external examination.

4.8. Check the amount of cylinders (n.1.2) is performed by filling the cylinders with water up to the base of the neck and subsequent determination of the volume or mass of water.

4.9. In case of discrepancy of testing results of samples for tensile or impact strength requirements of this standard must be re-tested twice the number of samples by type of tests showed a low result.

Results are unsatisfactory re-testing cylinders shall be re-heat treated, and then make the test of mechanical properties in the above order. Allowed not more than two reheat treatments. Additional leave is not considered as reheat treatment.

5. MARKING, PACKAGING, TRANSPORTATION AND STORAGE

5.1. On the spherical part of the neck of each container shall be clearly embossed with the following information:

trademark of the manufacturer;

serial number of the container according to the numbering system of the manufacturer;
date (month, year) of manufacturing and testing;

type of heat treatment:  — normalization of cylinders from carbon steel  — quenching and tempering, for cylinders of alloy steel; working pressure (P) and test products (P) in MPa (kgf/cm);

the nominal volume of the container L.

Note. By the customer’s order on the cylinders instead of the nominal volume must contain its actual value with a precision of 1 l,

the actual weight of cylinder in kg up to 1 kg;

the mark in TCI;

the designation of this standard.

5.2. The inner surface of the cylinders shall be protected from corrosion by filling it with a volatile inhibitor.

(Changed edition, Rev. N 1).

5.3. The outer thread of a mouth of cylinders should be protected from damage metal or plastic rings. The openings of the necks of the cylinders with internal thread must be tightly closed with metal screw caps with rubber gaskets or plastic threaded plugs. The openings of the necks of the cylinders with external thread tightly cover with plastic cap.

5.4. Each batch must be accompanied by a document certifying the compliance of cylinders with the requirements of this standard, which must be specified:

the name of the manufacturer and his address;

the number of cylinders and their numbers;

the results of hydraulic and pneumatic tests;

the designation of this standard.

5.5. Cylinders transporterowych by all kinds of transport in accordance with cargo carriage regulations applicable to transport of this species.

The transport containers by rail in carload shipments produce with maximum use of carrying capacity or tonnage of the vehicle.

Transportation of cylinders in the group G1 GOST 15150−69.

(Changed edition, Rev. N 1).

5.5. Transport marking with the application of basic, additional and informational inscriptions — according to GOST 14192−77.

(Added, Rev. N 1).

5.6. Storage of cylinders in the group G1 GOST 15150−69.

6. MANUFACTURER’S WARRANTY

6.1. The manufacturer must ensure compliance of cylinders with the requirements of this standard if the conditions of operation, transportation and storage established by this standard and the «Rules of arrangement and safe operation vessels working under pressure», approved by Gosgortekhnadzor of the USSR.

6.2. Warranty period — 2.5 years from the date of entry of cylinders in operation.

(Changed edition, Rev. N 1).