INTERSTATE STANDARD

PIPES

FLATING TEST METHOD

Edition (September 2010) with Change No. 1, approved in April 1980 (IUS 5-80).

By Decree of the State Committee of Standards of the Council of Ministers of the USSR dated December 23, 1975 No. 3981, the introduction date was set

01.07.77

The validity period was removed by Gosstandart Decree No. 1153 of September 10, 1992

This standard applies to metal seamless and welded pipes with an outer diameter of no more than 400 mm and with a wall thickness of no more than 15% of the outer diameter of the pipe and establishes a flattening test method at a temperature of (20 ± 10) °C.

The standard fully complies with ST SEV 480-77 regarding the flattening test.

1. NOTATION

1.1. When testing for flattening, the following designations are provided:

Initial outer diameter of a round pipe sample, mm - D;

Sample wall thickness, mm - A;

Distance between parallel planes at the end of the test, mm - N;

Inner diameter of the sample, mm - D VN.

2. SAMPLING METHOD

2.1. To test pipes for flattening, samples are used in the form of a piece of pipe with a length of 20-50 mm, and in case of disagreement in quality assessment, samples with a length of 1.5 D VN, but not less than 10 mm and not more than 100 mm.

2.2. The test can be carried out directly on the pipe with a preliminary cut perpendicular to the longitudinal axis to a depth of at least 0.8 D(Figure 1).

2.3. The cutting plane must be perpendicular to the axis of the pipe. Burrs on the edges of the specimen must be removed.

2.4. It is allowed to remove surface layers (internal and external) from the sample if this is established in the standards for specific products.

3. TESTING

3.1. For testing, the sample is placed between two smooth, rigid and parallel planes and smoothly flattened, bringing the compressive planes closer to a given distance N(Figures 2 and 3).

3.2. The width of the compression planes should always be greater than the width of the sample after flattening.

3.3. During testing, the weld seam is located at approximately an angle of 90° to the axis of load application (Fig. 4).

3.4. The rate of sample flattening in case of disagreement in assessing the quality of the test should be no more than 25 mm/min.

4. PROCESSING RESULTS

4.1. A sign that the sample has passed the test is the absence, after approaching the compressible surfaces to the value N on the outer and inner surfaces of cracks or tears with a metallic sheen, determined visually.

(Amended edition, Rev. No. 1).

5. TEST PROTOCOL

The test report should indicate:

Pipe material and dimensions;

Results.

(Introduced additionally, Amendment No. 1).

INTERSTATE STANDARD

PIPES

FLATING TEST METHOD

Official publication

Standardinform

INTERSTATE STANDARD

Flattening test method

ISS 23.040.10

Tubing. Flattening testing method

In return

GOST 8695-58

By Decree of the State Committee of Standards of the Council of Ministers of the USSR dated December 23, 1975 No. 3981, the introduction date was set

The validity period was lifted by Gosstandart Decree No. 1153 of September 10, 1992

This standard applies to metal seamless and welded pipes with an outer diameter of not more than 400 mm and with a wall thickness of not more than 15% of the outer diameter of the pipe and establishes a flattening test method at a temperature of (20 ± 10) °C.

The standard fully complies with ST SEV 480-77 in terms of flattening testing.

1. NOTATION

1.1. When testing for flattening, the following designations are provided:

Initial outer diameter of the round pipe sample, mm - D;

Sample wall thickness, mm - a;

Distance between parallel planes at the end of the test, mm - N\

Inner diameter of the sample, mm - Z> BH.

2. SAMPLING METHOD

2.1. To test pipes for flattening, samples are used in the form of a piece of pipe length

20-50 mm, and in case of disagreement in quality assessment - 1.5 L in length, but not less than 10 mm and not more than 100 mm.

2.2. The test can be carried out directly on the pipe with a preliminary cut perpendicular to the longitudinal axis to a depth of at least 0.8 D (Fig. 1).

2.3. The cutting plane must be perpendicular to the axis of the pipe. Burrs on the edges of the specimen must be removed.

2.4. It is allowed to remove surface layers (internal and external) from the sample if this is established in the standards for specific products.

Official publication Reproduction prohibited

Edition (September 2010) with Change No. 1, approved in April 1980 (IUS 5-80).

S. 2 GOST 8695-75

3. CONDUCTING THE TEST

3.1. For testing, the sample is placed between two smooth, rigid and parallel planes and it is smoothly flattened, bringing the compression planes closer to a given distance H (Fig. 2 and 3).

3.2. The width of the compression planes should always be greater than the width of the sample after flattening.

3.3. During testing, the weld seam is located at approximately an angle of 90° to the axis of load application (Fig. 4).

3.4. The rate of sample flattening in case of disagreement in assessing the quality of the test should be no more than 25 mm/min.

4.1. A sign that the sample has passed the test is the absence of cracks or tears with a metallic sheen on the outer and inner surfaces with a metallic sheen, determined visually, after approaching the compressible surfaces to the value H.

(Changed edition, Amendment No. 1).

4. PROCESSING RESULTS

5. TEST PROTOCOL

The test report indicates:

Pipe material and dimensions;

Results.

(Introduced additionally, Amendment No. 1).

STATE STANDARD OF THE USSR UNION

PIPES

FLATING TEST METHOD

GOST 8695-75
(ST SEV 480-77)

USSR STATE COMMITTEE ON STANDARDS

Moscow

STATE STANDARD OF THE USSR UNION

By Decree of the State Committee of Standards of the Council of Ministers of the USSR dated December 23, 1975 No. 3981, the validity period was established

from 07/01/1977

until 07/01/1982

Failure to comply with the standard is punishable by law

The standard complies with the requirements of the CMEA recommendation on standardization PC 68-63 and ISO recommendations R 202.

The standard fully complies with ST SEV 480-77 in terms of flattening testing.

1. NOTATION

1.1. When testing for flattening, the following designations are provided:

initial outer diameter of a round pipe sample, mm -D;

sample wall thickness, mm - A;

distance between parallel planes at the end of the test, mm - N;

internal diameter of the sample, mm -D int.

2. SAMPLING METHOD

2.1. To test pipes for flattening, samples are used in the form of a piece of pipe 20 - 50 mm long, and in case of disagreement in quality assessment - 1.5 mm longD vn , but not less than 10 mm and not more than 100 mm.

2.2. The test can be carried out directly on the pipe with a preliminary cut perpendicular to the longitudinal axis to a depth of at least 0.8D(crap.).

2.3. The cutting plane must be perpendicular to the axis of the pipe. Burrs on the edges of the specimen must be removed.

2.4. It is allowed to remove surface layers (internal and external) from the sample if this is established in the standards for specific products.

Crap. 1

3. TESTING

3.1. For testing, the sample is placed between two smooth, rigid and parallel planes and smoothly flattened, bringing the compressive planes closer to a given distance N(drawing and).

3.2. The width of the compression planes should always be greater than the width of the sample after flattening.

3.3. During testing, the weld seam is located at approximately an angle of 90° to the axis of load application (Fig. ).

3.4. The rate of sample flattening in case of disagreement in assessing the quality of the test should be no more than 25 mm/min.

4. PROCESSING RESULTS

(Changed edition, Amendment No. 1).

5. TEST PROTOCOL

The test report should indicate:

pipe material and dimensions;

results.

(Introduced additionally, Amendment No. 1).

GOST 8695-75

Group B69

INTERSTATE STANDARD

Flattening test method

Tubing. Flattening testing method

ISS 23.040.10

Date of introduction 1977-07-01

By Decree of the State Committee of Standards of the Council of Ministers of the USSR dated December 23, 1975 N 3981, the introduction date was set to July 1, 1977

The validity period was lifted by Gosstandart Decree dated September 10, 1992 N 1153

INSTEAD GOST 8695-58

EDITION (September 2010) with Amendment No. 1, approved in April 1980 (IUS 5-80)

This standard applies to metal seamless and welded pipes with an outer diameter of no more than 400 mm and with a wall thickness of no more than 15% of the outer diameter of the pipe and establishes a flattening test method at a temperature of (20±10)°C.

The standard complies with the requirements of the CMEA standardization recommendation RS 68-63* and the ISO recommendation R 202.
________________
* Access to international and foreign documents mentioned here and further in the text can be obtained by following the link to the website http://shop.cntd.ru. - Database manufacturer's note.

The standard fully complies with ST SEV 480-77 in terms of flattening testing.

1. NOTATION

1.1. When testing for flattening, the following designations are provided:

- initial outer diameter of the round pipe sample, mm - ;

- sample wall thickness, mm - ;

- distance between parallel planes at the end of the test, mm - ;

- internal diameter of the sample, mm - .

2. SAMPLING METHOD

2.1. To test pipes for flattening, samples are used in the form of a piece of pipe 20-50 mm long, and in case of disagreement in quality assessment - 1.5 mm long, but not less than 10 mm and not more than 100 mm.

2.2. The test can be carried out directly on the pipe with a preliminary cut perpendicular to the longitudinal axis to a depth of at least 0.8 (Fig. 1).

Damn.1

2.3. The cutting plane must be perpendicular to the axis of the pipe. Burrs on the edges of the specimen must be removed.

2.4. It is allowed to remove surface layers (internal and external) from the sample if this is established in the standards for specific products.

3. TESTING

3.1. For testing, the sample is placed between two smooth, rigid and parallel planes and it is smoothly flattened, bringing the compressive planes closer to a given distance (Fig. 2 and 3).

Damn.3

3.2. The width of the compression planes should always be greater than the width of the sample after flattening.

3.3. During testing, the weld seam is located at approximately an angle of 90° to the axis of load application (Fig. 4).

Damn.4

3.4. The rate of sample flattening in case of disagreement in assessing the quality of the test should be no more than 25 mm/min.

4. PROCESSING RESULTS

4.1. A sign that the sample has passed the test is the absence of cracks or tears with a metallic sheen on the outer and inner surfaces with a metallic sheen, determined visually, after the compressible surfaces have approached to a value.

(Changed edition, Amendment No. 1).

5. TEST PROTOCOL

The test report indicates:

- pipe material and size;

- results.

(Introduced additionally, Amendment No. 1).

Electronic document text
prepared by Kodeks JSC and verified against:
official publication
Metal and connecting pipes
parts for them. Part 4. Black pipes
metals and alloys cast and connecting
parts for them. Main dimensions. Methods
technological testing of pipes:
Sat. GOST. - M.: Standartinform, 2010

GOST 8695-75

Group B69

INTERSTATE STANDARD

Flattening test method

Tubing. Flattening testing method

Date of introduction 1977-07-01

ENTERED INTO EFFECT by Resolution of the State Committee of Standards of the Council of Ministers of the USSR dated December 23, 1975 N 3981

The validity period was lifted by Gosstandart resolution dated September 10, 1992 N 1153

INSTEAD GOST 8695-58

EDITION with Amendment No. 1, approved in April 1980 (IUS 5-80)

The standard fully complies with ST SEV 480-77 in terms of flattening testing.

1. NOTATION

1.1. When testing for flattening, the following designations are provided:

Initial outer diameter of the round pipe sample, mm - ;

Sample wall thickness, mm - ;

Distance between parallel planes at the end of the test, mm - ;

Inner diameter of the sample, mm - .

2. SAMPLING METHOD

2.2. The test can be carried out directly on the pipe with a preliminary cut perpendicular to the longitudinal axis to a depth of at least 0.8 (Fig. 1).

2.3. The cutting plane must be perpendicular to the axis of the pipe. Burrs on the edges of the specimen must be removed.

2.4. It is allowed to remove surface layers (internal and external) from the sample if this is established in the standards for specific products.

3. TESTING

3.1. For testing, the sample is placed between two smooth, rigid and parallel planes and it is smoothly flattened, bringing the compressive planes closer to a given distance (Fig. 2 and 3).

Damn.3

3.2. The width of the compression planes should always be greater than the width of the sample after flattening.

3.3. During testing, the weld seam is located at approximately an angle of 90° to the axis of load application (Fig. 4).

3.4. The rate of sample flattening in case of disagreement in assessing the quality of the test should be no more than 25 mm/min.

4. PROCESSING RESULTS

4.1. A sign that the sample has passed the test is the absence of cracks or tears with a metallic sheen on the outer and inner surfaces with a metallic sheen, determined visually, after the compressible surfaces have approached to a value.

(Changed edition, Amendment No. 1).

5. TEST PROTOCOL

The test report indicates:

Pipe material and size;

Results.

(Introduced additionally, Amendment No. 1).

The text of the document is verified according to:
official publication
Metal pipes and connecting parts
to them. Part 4. Pipes made of ferrous metals and alloys
castings and connecting parts to them. Main dimensions.
Methods of technological testing of pipes: Sat. GOST. -
M.: IPK Standards Publishing House, 2002