GOST 2936-75
GOST 2936−75 of oval seamless radiator Tubes. Specifications (with Amendments No. 1, 2)
GOST 2936−75
Group В64
STATE STANDARD OF THE USSR
THE SEAMLESS OVAL TUBE RADIATOR
Specifications
Plane-oval seamless radiator tubes.
Specifications
GST 18 4460
Date of introduction 1977−01−01
INFORMATION DATA
1. DEVELOPED by the State scientific-research Institute of alloys and processing of nonferrous metals
DEVELOPER
G. A. Goreglyad
2. APPROVED AND put INTO EFFECT the decision of the State standards Committee of the USSR dated 30 December, 1975, N 4105
3. REPLACE GOST 2402−77*
_________________
* Probably a mistake of the original. Should read «to Replace GOST 2936−56». (Information from Index «National standards» 2005). — Note the CODE.
4. REFERENCE NORMATIVE AND TECHNICAL DOCUMENTS
| The designation of the reference document referenced |
Item number |
| GOST 427−75 |
4.4 |
| GOST 1652.1−77 — GOST 1652.13−77 |
4.8 |
| GOST 2991−85 |
5.3 |
| GOST 3282−74 |
5.4 |
| GOST 3560−73 |
5.4 |
| GOST 6456−82 |
4.1 |
| GOST 6507−90 |
4.1, 4.2 |
| GOST 8828−89 |
5.3 |
| GOST 9557−87 |
5.4 |
| GOST 9569−79 |
5.3 |
| GOST 10006−80 |
4.6 |
| GOST 10198−91 |
5.3 |
| GOST 14192−96 |
5.5 |
| GOST 15102−75 |
5.3 |
| GOST 15527−70 |
2.1 |
| GOST 15846−79 |
5.7 |
| GOST 20435−75 |
5.3 |
| GOST 21140−88 |
5.3 |
| GOST 22225−76 |
5.3 |
| GOST 24231−80 |
4.8 |
| GOST 24597−81 |
5.4 |
| THAT 2−034−225−87 |
4.4, 4.5 |
5. Limitation of actions taken by Protocol No. 7−95 Interstate Council for standardization, Metrology and certification (ICS 11−95)
6. REPRINT (July 1998) with Amendments No. 1, 2 approved in March 1984, January 1991 (IUS 7−84, 5−91)
This standard applies to seamless flat-oval drawn tubes of brass, used in automotive and other industries.
(Changed edition, Rev. N 1, 2).
1. ASSORTMENT
1.1. Shape, dimensions and limit deviations of the radiator tubes shall be as specified in the drawing and in the table.1 and 2.
Table 1
mm
The major axis |
Minor axis |
Wall thickness | ||||
| Nomin. |
Pred. off. |
Nomin. |
Pred. off. |
0,25±0,02 |
0,40±0,03 |
0,55±0,06 |
| 2,5 |
x |
x |
- | |||
| 17,0 |
3,5 |
x |
x |
- | ||
| 17,5 |
4,0 |
- |
- |
x | ||
| 1,9 |
x |
- |
- | |||
| 18,0 |
±0,15 |
2,2 |
±0,15 |
x |
- |
- |
| 3,0 |
x |
- |
- | |||
| 2,0 |
x |
- |
- | |||
| 19,0 |
2,2 |
x |
x |
x | ||
| 19,5 |
2,5 |
x |
x |
- | ||
| 21,5 |
3,0 |
x |
- |
- | ||
Note. The symbol «x» means that pipes of this size are manufactured.
Table 2
mm
| Tube length | Limit deviation |
| Up to 500 | ±0,5 |
| SV. 500 to 850 | ±1,0 |
| «850» 1300 |
±1,2 |
1.2. Tubes manufactured in length from 250 to 1300 mm dimensional or random.
Examples of symbols
The legend shall appear on the diagram:
when the following abbreviations:
| method of manufacturing: drawn |
— D |
| sectional shape: oval | - |
| condition: solid | — T |
| length: random | — ND |
| dimensional | — MD. |
Note. The sign «X» is placed in place of missing data.
Tube, drawn, oval, solid, size of the major axis 17 mm, minor axis of 3.5 mm and a wall thickness of 0.4 mm, random length, brass brand l96:
Tube DPORT 17х3,5x0,4 ND l96 GOST 2936−75
The same size at the major axis 21.5 mm, minor axis of 3.0 mm, a wall thickness of 0.25 mm, length 780 mm brass brand l96:
Tube DPORT 21,5x3,0x0,25х780 MD l96 GOST 2936−75.
(Changed edition, Rev. N 1).
2. TECHNICAL REQUIREMENTS
2.1. Pipe shall be manufactured in accordance with the requirements of this standard for technological regulations approved in the prescribed manner.
(Added, Rev. N 1).
2.1. Pipe shall be manufactured from brass grade l96 according to GOST 15527.
2.2. Pipe shall be manufactured in the solid state.
2.3. The outer and inner surfaces of the tubes shall be clean, without shells, captured, bubbles and scratches that output tube for limit deviation for wall thickness.
Rough ring, Crescent streaks, dents on the surface of the tubes to a depth of more than 0.5 mm are not allowed.
Allowed local dent depth of up to 0.5 mm not more than 5% of the tubes from the mass of the party. On the surface of the tubes allowed water spots and the color of the tint.
2.4. The ends of the tubes should be trimmed evenly at right angles to the axis and must not have burrs.
Cut end Squareness, mm should take the tube for the limit deviations of length.
2.5. Raznoshennoy tubes shall not withdraw their limit deviations for wall thickness.
2.6. The local curvature should not exceed the values given in table.3.
Table 3
mm
| Tube length |
Local curvature | |
| along the edge |
along the flat sides | |
| Up to 400 |
0,6 |
1,5 |
| SV. 400 to 500 | 1,0 |
3,0 |
| «500» 850 | 1,8 |
5,0 |
| «850 | 2,3 |
6,0 |
(Changed edition, Rev. N 1).
2.7. The twisting of the tubes shall not exceed the values given in table.4.
Table 4
mm
| Tube length |
Twisting |
| Up to 400 |
0,4 |
| SV. 400 to 500 |
0,6 |
| «500» 700 |
0,9 |
| «700» 900 |
1,4 |
| «900» 1300 |
1,9 |
2.8. Rupture strength of tubes must be 340−590 MPa (35−60 kgf/mm
). Elongation is not standardized.
2.9. The tube must be sealed.
2.8−2.9. (Changed edition, Rev. N 1).
3. ACCEPTANCE RULES
3.1. Tube take parties. The party should consist of pipes of the same size and decorated the same document about quality that contains:
trademark or the name and trademark of manufacturer;
grade;
the size of the tubes;
batch number;
the weight of the party;
the results of the tests;
the designation of this standard.
The mass of the party must be not more than 1500 kg.
(Changed edition, Rev. N 1).
3.2. Check the outer surface must be subjected to each tube batch.
3.3. The measurement should be subjected to three tubes from each 100 kg.
3.4. For the tensile test taken three pipes from the party.
3.5. To check for leaks select the three tubes from the party.
3.6. For chemical analysis select two tubes from the party. In factory sampling it is allowed to produce from the molten metal.
3.7. If unsatisfactory test results of at least one of the indicators it is carried out re-testing at twice the sample taken from the same batch. The results of repeated tests apply to the entire party.
4. TEST METHODS
4.1. Inspection of the external surfaces of the tubes shall be made without the use of magnifying devices.
The depth of permissible defects check reference sweep them with the abrasive cloth of the type I according to GOST 6456 grain size no larger than No. 5.
The depth of the dent is measured with a micrometer according to GOST 6507.
4.2. Wall thickness measured with a micrometer with a scale division of 0.01 mm according to GOST 6507 or other measuring tools that provide required accuracy of measurement.
For measuring the wall thickness of the tube is incised in a longitudinal direction on both sides.
4.3. The dimensions of the axes of the ellipse and the length of the tube check patterns, the slits which are made passable and impassable (passing — nominal size of the pipe on the axis or length plus tolerance no — go- the nominal dimension minus tolerance).
4.4. The curvature of the tubes is determined as follows: the tube is placed on the plate. To check the tube to make a rigid steel ruler according to GOST 427 with a length of 1 m and using the probe on the other 2−034−225 or templates to measure the maximum distance between the line and the tube.
4.5. Torsion tubes to measure the amount of lag of one of the four corners of the tube placed on a plate with the wide side. The amount of lag to check the probe on the other 2−034−225.
4.4, 4.5. (Changed edition, Rev. N 2).
4.6. The tensile test is carried out according to GOST 10006.
For the tensile test from each tube, taken from the party, cut off one sample.
4.7. The leak test is carried out in water with air pressure of 0.1 MPa (1 kgf/cm).
Pipes should be under pressure of not less than 1 s.
The appearance of air bubbles on the surface of the tubes is a sign of leakage.
4.6−4.7. (Changed edition, Rev. N 1).
4.8. Determination of chemical composition shall be carried out according to GOST 1652.1 — GOST 1652.13.
The selection and preparation of samples for chemical analysis is carried out according to GOST 24231.
To determine the chemical composition of each tube, taken from the party, cut off one sample.
(Changed edition, Rev. N 1, 2).
5. PACKING, MARKING, TRANSPORTATION AND STORAGE
5.1. Tubes should be tied in bundles with twine made of synthetic material or another material that does not deteriorate the quality of the packaging, according to normative-technical documentation in at least two places.
The weight of the beams — no more than 25 kg.
5.2. Each bundle of tubes shall be attached a label showing:
the trademark or name and trademark of manufacturer;
grade alloy;
the size of the tubes;
batch number;
designation of this standard;
stamp of technical control.
5.3. The bundles of tubes must be Packed in boxes type I, II-1 according to GOST 2991, type III-1 according to GOST 10198 or containers according to GOST 20435, 22225 GOST, GOST 15102 or according to normative-technical documentation, lined the inside with paper, protected from mechanical damage and corrosion according to GOST 8828, GOST 9569 or according to normative-technical documentation.
Dimensions of boxes — GOST 21140 or normative-technical documentation.
Pipe must be laid and fastened in such a way that during transport they cannot move them.
Weight of cargo must not exceed 5000 kg.
During transportation in railway cars, the weight of cargo must not exceed 1250 kg.
5.1−5.3. (Changed edition, Rev. N 1).
5.4. The package needs to be formed into transport packets weighing up to 1250 kg. overall dimensions of packages — according to GOST 24597.
Packaging is carried out on pallets according to GOST 9557 or without pallets with the use of bars not less than 50 mm and strapping in at least two areas or cross wire with a diameter of not less than 3 mm according to GOST 3282 or tape of size not less than 0,2 x 30 mm according to GOST 3560.
(Changed edition, Rev. N 1, 2).
5.5. Transport marking — according to GOST 14192 with the application of manipulation sign «Protect from moisture». In addition, apply the lot number in a place free from traffic markings.
5.6. Transportation is carried out by all kinds of transport in covered vehicles in accordance with cargo carriage regulations applicable to transport of this species.
Placement and mounting of the tubes, transported by rail, must comply with the conditions of loading and fastening of cargoes, approved by the Ministry of Railways of the USSR.
5.7. Packaging tubes are designed for areas far North and remote areas — according to GOST 15846 in the group «Metals and metal products."
5.8. Tube in packaged form shall be stored in covered premises. Tube in unpackaged form shall be stored in covered dry rooms on shelves, pallets or racks, free of mechanical damage and contact with the active chemical reagents.
5.5−5.8. (Changed edition, Rev. N 1).
APPLICATION (reference). The cross-sectional area and theoretical weight of 1 m of tubes
APP
Reference
The major axis |
Minor axis |
Wall thickness, mm |
The cross-sectional area, mm |
Theoretical weight of 1 m of pipes, g |
| mm |
||||
| 17,0 |
2,5 |
0,25 |
Of 9.02 |
80,24 |
| 17,0 |
2,5 |
0,40 |
14,24 |
126,71 |
| 17,0 |
3,5 |
0,25 |
9,30 |
82,78 |
| 17,0 |
3,5 |
0,40 |
14,69 |
130,77 |
| 17,5 |
4,0 |
0,55 |
20,81 |
185,19 |
| 18,0 |
1,9 |
0,25 |
9,35 |
83,17 |
| 18,0 |
2,2 |
0,25 |
9,43 |
83,93 |
| 18,0 |
3,0 |
0,25 |
Of 9.66 |
85,96 |
| 19,0 |
2,0 |
0,25 |
9,87 |
87,88 |
| 19,0 |
2,2 |
0,25 |
9,93 |
88,38 |
| 19,0 |
2,2 |
0,40 |
15,70 |
139,74 |
| 19,0 |
2,2 |
0,55 |
Of 21.33 |
189,83 |
| 19,5 |
2,5 |
0,25 |
10,27 |
91,37 |
| 19,5 |
2,5 |
0,40 |
16,24 |
144,51 |
| 21,5 |
3,0 |
0,25 |
11,41 |
101,54 |
Note. Theoretical mass calculated by the nominal dimensions of the tubes. For brass brand l96 density is taken equal to 8.9 g/cm.
