GOST 14162-79

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  ГОСТ 14162-79

GOST 14162−79 steel Tubes of small dimensions (capillary). Specifications (with Amendments No. 1, 2)

GOST 14162−79

Group В62

INTERSTATE STANDARD

STEEL TUBES OF SMALL DIMENSIONS (CAPILLARY)

Specifications

Steel tubes of small dimensions (capillary).
Specifications

ISS 23.040.10
GST 11 9100

Date of introduction 1981−01−01

INFORMATION DATA

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

DEVELOPERS

A. A. Shevchenko, V. P. Sokurenko, M. Bernstein, N. And. Petrenko

2. APPROVED AND put INTO EFFECT by Decision of the USSR State Committee for standards from 12.07.79 N 2527

3. REPLACE GOST 14162−69

4. REFERENCE NORMATIVE AND TECHNICAL DOCUMENTS

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

6. EDITION with Amendments No. 1, 2 approved in December 1985, March 1990 (IUS 4−86, 7−90)

This standard applies to tubes of small dimensions (capillary) of carbon and corrosion resistant steels and alloys used for pipes and parts of structures for different purposes.

1. ASSORTMENT

1.1. Dimensions of tubes shall be as specified in table.1.

Table 1

Extension table 1

Extension table 1

Extension table 1

Extension table 1

Extension table 1

Extension table 1

Note. Linear mass of the tube (), kg/m, determined by the formula ,

where is the nominal outside diameter, mm;

 — nominal wall thickness, mm;

 — the density of the metal in accordance with table.3 depending on the grade of steel.

1.2. The length of the tube must be manufactured:

random — not less than 0.3 m;

measuring — no more than 4 m, with a maximum deviation of for the total length plus 15 mm;

dimensional — not more than 4 m, with an allowance for each cut to 5 mm and the limit deviation for the total length plus 15 mm;

the riots — not more than 160 m.

At customer’s request, tubes, dimensional and multiple dimensional manufactured in length not exceeding 7 m.

In the party-dimensional and multiple dimensional tubes were allowed no more than 10% of random pipes until January 1, 1988

1.1, 1.2. (Changed edition, Rev. N 1).

1.3. Pipe shall be manufactured in outside diameter and wall thickness. With inner diameter more than 0.6 mm of the tube are also made at the inner diameter and wall thickness or inner and outer diameters. At the customer’s request the tube inner diameter of 0.6 mm and less are produced at the inner diameter and wall thickness or inner and outer diameters.

(Changed edition, Rev. N 1, 2).

1.4. Limit deviations for outer diameter and wall thickness must comply with table.2.

Table 2

1.5. For tubes internal diameter of 0.6 mm and less tolerances for the inner diameter must not exceed specified in table.1.

For tubes internal diameter greater than 0.6 mm tolerances for inside diameter should not exceed more than 0.01 mm, the corresponding maximum deviations for the outside diameter (tab.2).

1.6. At customer’s request, tubes can be produced with a combination of extreme deviations, such as:

outer diameter — increased accuracy,

wall thickness — the usual precision is

and with one-side maximum deviation of the outside diameter and wall thickness. Amount of one-way limit deviations should not exceed the sum of limit deviations.

At the request of the consumer tubes are made at the inner diameter without rationing limit deviation for wall thickness and outer diameter.

1.7. The curvature of the tubes on a plot length of 1 m should not exceed 3 mm. On request of the customer can be manufactured tubes without editing.

The curvature of the tubes of an external diameter less than 1 mm and tubes manufactured in coils or cold-worked condition, is not standardized, however, the tube must not have sharp bends.

Examples of symbols

Tube outer diameter 2.0 mm, a wall thickness of 0.4 mm, made of steel 12X18H10T, regular accuracy of manufacturing according to the diameter and wall thickness, measuring length of 4000 mm, with the supply of the chemical composition and mechanical properties:

Tube 2,0x0,4х4000−12X18H10T — a GOST 14162−79

The same manufacturing high precision on diameter and wall thickness, length 1500 mm, with the supply of the chemical composition:

Tube 2,0пх0,4пх1500 cu-12KH18N10T — B GOST 14162−79

Tube of internal diameter of 1.2 mm, a wall thickness of 0.4 mm, made of steel 12X18H10T, regular accuracy of manufacturing, according to the diameter and wall thickness, random, supply mechanical characteristics:

Tube NR 1,2x0,4−12KH18N10T — GOST 14162−79

The same manufacturing high precision in diameter and normal wall thickness, length 4000 mm (dimensional), supply mechanical characteristics:

Tube NR 1,2пх0,4х4000−12KH18N10T — GOST 14162−79

Same with the delivery tubes in coils with a length of 40 m:

Tube NR 1,2пх0,4хбунт 40−12KH18N10T — GOST 14162−79

Tube outer diameter 2.0 mm, inner diameter 0.8 mm, regular accuracy of manufacturing external and internal diameters, measuring length of 4000 mm, with standard chemical composition:

Tube 2,0 CVI 0,8х4000−12KH18N10T — B GOST 14162−79

1.6, 1.7. (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, made of carbon and corrosion resistant steels and alloys listed in table.3, with the chemical composition according to GOST 1050, GOST 5632, GOST 10994.

Table 3

By agreement with the consumer allowed fabrication of tubes of steels and alloys other brands conventional smelting, electroslag and vacuum-arc remelting.

2.2. Depending on the purpose of the tube should be made of the following groups:

A — with standard chemical composition and mechanical properties;

B — with standard chemical composition;

In — with standard mechanical properties.

2.3. The tube should be heat-treated or negativnye.

Mechanical properties of heat treated tubes shall be as specified in table.3.

Mechanical properties of work-hardened tubes are established by agreement between manufacturer and consumer.

2.1−2.3. (Changed edition, Rev. N 1).

2.4. Temperature coefficient of linear expansion of alloy 48NKH must meet the requirements of GOST 14080.

2.5. Heat treated tubing is manufactured from etched surface. At the request of the consumer pipe is manufactured with a polished outer surface.

During heat treatment of the tubes in vacuum furnaces or in furnaces with protective atmosphere and the outer surface of the additional processing is allowed not to.

(Changed edition, Rev. N 1).

2.6. The outer surface of the tubes shall be bright, clean, should not have scratches, dents, wooloowin, sunsets, shells, shells, cracks and etching of the rash.

Allowed color of a tint, as well as individual risks, scratches and shallow dents, not deducing the dimensions of the tubes outside the sub-zero variance and can be easily removed by cleaning.

On the tubes allowed the presence of thin, needlewoman oxide film.

The inner surface of the tubes shall be bright, clean, should not have scale, Pererva, Pisochyn and wrinkles, visible to the naked eye. Allowed color of a tint. In coordination with the consumer colors of tint are not permitted.

(Changed edition, Rev. N 1, 2).

2.7. Pipes with diameter more than 1.6 mm shall be manufactured with cut ends, without burrs. The ends of the tubes with a diameter less than 1.6 mm cut.

2.8. To clean the channel of the tube must be purged from each end with dry air or inert gas.

The air pressure for blowing should be at least of 0.49 MPa (5 kgf/cm).

2.9. At customer’s request, heat-treated tubing outer diameter of 1 mm or more to withstand the bending, flattening and controlling the microstructure (grain size). Methods and standards determined by agreement between manufacturer and consumer.

2.10. At customer’s request, tubes, working under pressure, shall withstand a leak test under pressure of 0.59−0.78 MPa (6−8 kg/cm).

The ability of tubes to withstand the leakproofness test is provided by the production technology.

2.9, 2.10. (Changed edition, Rev. N 1).

2.11. At customer’s request, heat-treated tubing internal diameter 0.8 mm and more of the steel 12KH18N9, 08KH18N10T, 12KH18N10T, and 08KH18N12T 12Х18Н12Т must withstand the test of intercrystalline corrosion.

(Added, Rev. N 1).

3. ACCEPTANCE RULES

3.1. Tube take parties. The party should consist of pipes of the same nominal diameter, same wall thickness, the same steel grade or alloy, one mode of heat treatment and be accompanied by one document on quality in accordance with GOST 10692.

The total length of the tubes in the party should be no more than 1000 m. the Mass of the party must be not more than 70 kg.

(Changed edition, Rev. N 1).

3.2. Check the outer surface and the outer diameter of the tube is subjected to each party.

(Changed edition, Rev. N 2).

3.3. To control the quality from batches of finished tubes are taken:

5%, but not less than ten handsets — to check the inner surface, the wall thickness and internal diameter;

five tubes for control of mechanical properties, bending and flattening, and microstructure;

two tubes are used for control of intergranular corrosion;

two tubes for leak.

(Changed edition, Rev. N 1).

3.4. (Deleted, Rev. N 1).

3.5. Temperature coefficient of linear expansion of alloy 48NKH and chemical composition of the metal of the tubes shall be delivered in accordance with the document of quality blanks for tubes.

3.6. (Deleted, Rev. N 1).

3.7. If unsatisfactory test results of at least one of the indicators is carried out on it re-tests on twice the number of samples taken from the same batch.

The results of repeated tests apply to the entire party.

(Changed edition, Rev. N 2).

4. TEST METHODS

4.1. For testing mechanical properties tests for bending and flattening, control intergranular corrosion, microstructure, quality inner surface and wall thickness for each selected test tube cut off one sample.

4.2. Check the outer surface is carried out by visual inspection.

Check the inner surface is carried out on longitudinal samples with a length of 50−100 mm, cut from the ends of the tubes and cut along a generatrix or nicked by forming up to half of the diameter, or duvai* dry air under pressure not less than the 0.49 MPa (5 kgf/cm) on a white screen.
________________
* The text matches the original. — Note the CODE.

4.3. The outer diameter control of a micrometer according to GOST 6507 and GOST 4381 accurate to 0.01 mm, or other devices to ensure the specified measurement accuracy and certified in accordance with GOST 8.326*.
________________
* On the territory of the Russian Federation there are PR 50.2.009−94 (hereafter).

(Changed edition, Rev. N 1).

4.4. The wall thickness of tubes with internal diameter exceeding 1 mm is controlled on tubes, pipes or prepared samples stenkomer indicator according to GOST 11358 or special devices with dial indicators according to GOST 577; universal microscope; microscopes in the tool according to GOST 8074 or other devices that provide the necessary measurement accuracy and certified in accordance with GOST 8.326.

Wall thickness () of the tubes, mm inner diameter of less than 1.0 mm is calculated by the formula

,

where is the outer diameter expressed in mm;

 — internal diameter, mm determined by the formula p. 4.5.

(Changed edition, Rev. N 1, 2).

4.5. Inner diameter () is controlled by subtracting the outer diameter of the two wall thickness or calculated by the formula

,

where is the cross-sectional area of the tube, mm, is calculated according to the formula

,

where is the mass of the tube g;

the length of the sample tube, mm;

 — steel density, g/cm.

The tube is weighed with an error not more than ±0.02 g.

Permitted to control the internal diameter of the tubes on the ground, passable and impassable limits calibers-tubes according to GOST and GOST 14808 14809 or steel gauged wire.

(Changed edition, Rev. N 1).

4.6. The tensile test is carried out according to GOST 10006 longitudinal samples in a segment of pipe of total cross section. For tubes with a wall thickness of less than 0.2 mm the test is carried out according to normative-technical documentation.

4.7. The chemical composition of the material of the tubes is controlled according to GOST 12344-GOST 12365, 28473 GOST and GOST 22536.0 to GOST 22536.1-GOST 22536.6.

4.8. Test for intergranular corrosion is carried out by the method GOST 6032 AM or the agreed procedure. Allowed to test according to the method of AMU GOST 6032. In case of disagreement in evaluation of the results of test carried out according to the method AM GOST 6032.

(Changed edition, Rev. N 1).

4.9. The leak test is carried out by injection of dry air under pressure 0,57−0,78 MPa (6−8 kg/cm) in the water tube with a tapered end; this should not be an air leak.

4.10. Control of the microstructure is carried out according to normative-technical documentation.

4.11. The length of the tubes is controlled by a measuring reel according to GOST 7502 or fixed line, certified in accordance with GOST 8.326.

(Added, Rev. N 1).

4.12. The curvature of the tubes is controlled straightedge according to GOST 8026 probe on the other 2−034−225 or other measuring instruments, ensuring the necessary measurement accuracy and certified in accordance with GOST 8.326.

(Changed edition, Rev. N 2).

4.13. Determination of grain size by metallographic methods performed on longitudinal samples according to GOST 5639.

Allowed the determination of grain size by ultrasonic technique.

In case of disagreement in the evaluation of the results determination is made by metallographic methods according to GOST 5639.

(Added, Rev. N 1).

5. MARKING, PACKAGING, TRANSPORTATION AND STORAGE

5.1. Marking, packaging, transportation and storage — by GOST 10692.

5.2. During transportation of the tubes in coils weight of cargo space must not exceed 70 kg. Riots tubes should be tied with twine in at least two places. The inner diameter of the revolt should be 400−700 mm.

(Changed edition, Rev. N 1, 2).

5.3. Tubes are Packed in boxes or lattices.

5.4. During long-term storage (not less than 3 months), at the request of the consumer, the tubes must be coated with anti-corrosion grease. The lubricant must completely dissolve in white spirit (GOST 3134).

5.5. At the request of the consumer the ends of the tubes with the purpose of protection of the channel from the penetration of moisture into it needs to be tapered to the contact wall in the 10−15 mm in length (without reducing the dimensional length).