GOST 30564-98

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  ГОСТ 30564-98

GOST 30564−98 seamless hot deformed Tubes made of carbon and alloyed steels with special properties. Specifications

GOST 30564−98

Group В62

INTERSTATE STANDARD

SEAMLESS HOT DEFORMED TUBES MADE OF CARBON
AND ALLOY STEELS WITH SPECIAL PROPERTIES

Specifications

Seamless hot-worked carbon and alloy steel pipes
and tubes with special properties.
Specifications

ISS 23.040.10
OKP 13 1200

Date of introduction 2000−07−01

Preface

1 DEVELOPED by the Interstate technical Committee for standardization MTK 7, State tube Institute

SUBMITTED to the State Committee of Ukraine for standardization, Metrology and certification

2 ADOPTED by the Interstate Council for standardization, Metrology and certification (minutes N 13 dated 28 may 1998)

The adoption voted:

3 Resolution of the State Committee of the Russian Federation for standardization and Metrology dated December 20, 1999 No. 556-St inter-state standard GOST 30564−98 introduced directly as state standard of the Russian Federation from July 1, 2000.

4 INTRODUCED FOR THE FIRST TIME

1 Scope

This standard applies to seamless hot-deformed pipes of carbon and alloy steels for pipelines.

2 Normative references

The present standard features references to the following standards:

GOST 166−89 (ISO 3599−76) Calipers. Specifications

GOST 1050−88 hire gauged bars with special surface finishing of carbon structural quality steel. General specifications

GOST 2216−84 Gauges-adjustable bracket smooth. Specifications

GOST 3728−78 Pipe. Method of bend test

GOST 3845−75 Pipe metal. Test method hydraulic pressure

GOST 4543−71 rolled alloy structural steel. Specifications

GOST 5378−88 Protractors with Vernier. Specifications

GOST 6507−90 Micrometers. Specifications

GOST 7502−98 metallic measuring tape. Specifications

GOST 7565−81 (ISO 377−2-89) Iron, steel and alloys. Sampling method for determination of chemical composition

GOST 8026−92 Line calibration. Specifications

GOST 8695−75 Pipe. Test method for flattening

GOST 8732−78 seamless steel Pipes hot-deformed. Assortment

GOST 9454−78 Metals. Test method for impact strength at low, room and elevated temperatures

GOST 10006−80 (ISO 6892−84) of the Pipe metal. Test method tensile

GOST 10243−75 Steel. Test method and evaluation of the macrostructure

GOST 10692−80 Pipe steel, cast iron and fittings to them. Acceptance, marking, packing, transportation and storage

GOST 11358−89 Thickness and stenkomer indicator with a scale division of 0.01 and 0.1 mm. specifications

GOST 12344−88 Steel alloyed and high alloy. Methods for determination of carbon

GOST 12345−88 Steel alloyed and high alloy. Methods of determining sulphur

GOST 12346−78 (ISO 439−82, ISO 4829−1-86) Steel alloyed and high alloy. Methods for determination of silicon

GOST 12347−77 Steel alloyed and high alloy. Methods for determination of phosphorus

GOST 12348−78 (ISO 629−82) Steel alloyed and high alloy. Methods for determination of manganese

GOST 12350−78 Steel alloyed and high alloy. Methods for determination of chromium

GOST 12352−81 Steel alloyed and high alloy. Methods for determination of Nickel

GOST 12354−81 Steel alloyed and high alloy. Methods for determination of molybdenum

GOST 12355−78 Steel alloyed and high alloy. Methods for determination of copper

GOST 12356−81 Steel alloyed and high alloy. Method of determining titanium

GOST 12357−84 Steel alloyed and high alloy. Methods for determination of aluminium

GOST 12358−82 Steel alloyed and high alloy. Methods for determination of arsenic

GOST 12359−99 (ISO 4945−77) Steels carbon, alloyed and high alloy. Methods for determination of nitrogen

GOST 12361−82 Steel alloyed and high alloy. Methods for determination of niobium

GOST 18360−93 Gauges-bracket sheet for diameters from 3 to 260 mm. Dimensions

GOST 18365−93 Gauges bracket sheet with changeable lips for diameters over 100 to 360 mm. Dimensions

GOST 19281−89 (ISO 4950−2-81, ISO 4950−3-81, ISO 4951−79, ISO 4995−78, ISO 4996−78, ISO 5952−83) rolled steel with increased strength. General specifications

GOST 22536.0−87 carbon Steel and unalloyed cast iron. General requirements for methods of analysis

GOST 22536.1−88 carbon Steel and unalloyed cast iron. Methods for determination of total carbon and graphite

GOST 22536.2−87 carbon Steel and unalloyed cast iron. Methods of determining sulphur

GOST 22536.3−88 carbon Steel and unalloyed cast iron. Methods for determination of phosphorus

GOST 22536.4−88 carbon Steel and unalloyed cast iron. Methods for determination of silicon

GOST 22536.5−87 (ISO 629−82) carbon Steel and unalloyed cast iron. Methods for determination of manganese

GOST 22536.6−88 carbon Steel and unalloyed cast iron. Methods for determination of arsenic

GOST 28473−90 Iron, steel, ferroalloys, chromium and manganese metal. General requirements for methods of analysis

3 Assortment

3.1 Pipe is manufactured with sizes of outer diameter and wall thickness. By agreement with the consumer allowed to supply pipes for the exterior and interior diameter and raznoshennoy.

3.2 Dimensions and weight of 1 m of pipes shall be as given in table 1.

In coordination with the consumer pipes can be manufactured with the intermediate indicated in table 1, the external diameters and wall thickness in accordance with GOST 8732 assortment.

Table 1 — Dimensions and weight of tubes

3.3 Length of pipes, maximum deviations in size, ovality, raznoshennoy and the curvature shall be as given in GOST 8732.

In coordination with the consumer the ultimate deflection for pipes of outside diameter 219 mm and over shall not exceed:

— the outside diameter ±0,8%;

— wall thickness ±12,5% for thicknesses of 15 mm or more.

3.4 By agreement between manufacturer and consumer pipes can be manufactured with a combination of extreme deviations, such as: outer diameter — increased accuracy, and wall thickness — the usual precision.

Examples of symbols

Pipe outer diameter 70 mm, wall thickness of 3.5 mm, random length, regular accuracy of manufacturing, from steel of grade 10:

Pipe outer diameter 70 mm, wall thickness of 3.5 mm, random length, high precision manufacturing in diameter and normal wall thickness, steel grade 10:

Pipe outer diameter 70 mm, wall thickness 3.5 mm, length 6000 mm (measuring length), manufacturing high precision on diameter and wall thickness of steel grade 09G2S:

The same length that are multiples of 1250 mm:

4 Technical requirements

4.1 Pipe shall be manufactured from steel grades 10, 20 with the chemical composition according to GOST 1050, brands 10G2, 30KHMA, 15HM — according to GOST 4543, 09G2S — according to GOST 19281 and brand 10G2A — with the chemical composition shown in table 2.

Table 2 — Chemical composition of steel 10G2A

4.2 the Pipes are made without heat treatment.

Norms of mechanical properties of pipe metal in delivery condition shall be as specified in table 3.

Table 3 — Mechanical properties of pipe metal in delivery condition

4.3 At the customer’s request pipes with a wall thickness from 5 mm to 22 mm should stand the test of the impact strength at a temperature of 20°C. the Minimum value of impact strength must comply with 29 j/cm(3 kgf·m/cm).

Allowed test tubes for impact strength at other temperatures. In this case, the norms of toughness, and temperature tests shall be agreed between the manufacturer and the customer.

4.4 To ensure that standards of mechanical properties and toughness is allowed to carry out heat treatment of tubes on the manufacturer.

4.5 On the outer and inner surfaces of pipes are not allowed cracks, slivers, steelmaking and rolling descent, mustache, ujima, bloating, flaw, scaly, sunsets, delamination, foreign rolled dirt, rolled metal contaminants.

Allowed dents, risks, small slivers of pipe origin, a layer of dross that does not hinder visual inspection of pipes, traces of Stripping defects and other defects of a mechanical origin, if they do not take wall thickness for the minimum value. In coordination with the consumer the depth of allowable defects of pipes must not exceed 2 mm.

4.6 the pipe Ends should be square-cut and cleaned of burrs. This allowed the formation of the chamfer at an angle of at least 70° to the axis of the pipe.

4.7 the ends of the pipes with wall thickness of 20 mm or more is cut autogenous cutting, plasma cutting or saw. At customer’s request, cutting of pipes with a blowtorch is not permitted.

When cutting pipes with wall thickness of 20 mm or more oxy-fuel, plasma cutting or saw allowance along the length of the pipes should be at least 20 mm for each cut. At the request of the consumer the ends of the pipes with wall thickness of 20 mm or more do not cut. Uncut part of the pipe, mark with paint and pipe length not included.

At the request of the consumer at the ends of the pipes with wall thickness from 5 to 20 mm should be removed chamfer at an angle of 30°-35° to the pipe end. This should be left to the socket ring width of 1−3 mm.

4.8 Pipe to withstand hydraulic pressure in accordance with the requirements of GOST 3845 with allowable stress equal to 80% of the yield strength for this steel grade.

Instead of testing a hydraulic pressure is allowed to carry out non-destructive testing by the method that provides compliance with the standards of pipe hydraulic test pressure and duly approved.

4.9 At the request of the consumer pipes shall withstand a test bend.

4.10 Pipe external diameter not exceeding 400 mm and a wall thickness of not more than 15% of the outer diameter to withstand the test of flattening to obtain sludinajumi between surfaces, distances , %, calculated according to the formula

(2)

where = 0,09 for steel grades 10 and 0.08 for other steel grades;

 — nominal wall thickness, mm;

 — nominal external diameter, mm.

4.11 At the request of the consumer pipe with a wall thickness of 10 mm or more is subjected to the control of the macrostructure.

In the macrostructure of the metal pipes are not allowed traces podnasadochnogo looseness, delamination, cracks, pores, bubbles and drowned crust, flocs, foreign non-metallic and metallic inclusions, visible without using the magnifying devices.

4.12 At the request of the consumer pipes shall be subjected to the quality control of metals by nondestructive methods according to the method approved in the prescribed manner.

5 acceptance Rules

5.1 Pipe take parties. The party should consist of pipes of the same size (diameter and wall thickness), one grade of steel, same heat treatment (heat-treated tubes) and be accompanied by one document on quality in accordance with shot 10692 addition:

— for party, consisting of one melting, and chemical composition of the steel in accordance with the document on the quality of the workpiece;

for the game, consisting of different heats, reference is made to the appropriate standard for the grade of steel.

5.2 the Number of pipes in the lot shall be not more than:

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

200 pieces for pipes of other sizes.

5.3 At customer’s request, the party may consist of pipes made of steel in one heat.

5.4 Dimensions and surface quality control on each pipe.

5.5 Chemical composition of the steel pipe is taken on the document about the quality of the manufacturer of the workpiece. If there is disagreement carried out chemical analysis of the metal pipes.

5.6 To control the macrostructure, mechanical properties, drop test, bend, bend and flattening the two tubes taken from the party.

To check the chemical composition of select three tubes from the party.

5.7 Test the hydraulic pressure or equivalent NDT is subjected to each pipe.

5.8 quality Control of metals non-destructive methods are subjected to each pipe.

5.9 If unsatisfactory test results of at least one of the indicators it is carried out re-tests on twice the number of tubes taken from the same batch. Satisfactory results of the repeated tests extend to the whole party, with the exception of pipes, rejected the results of the initial tests.

If the results of the repeated test is unsatisfactory, the entire batch is rejected.

The rejected batch may be subjected to heat treatment or other process operations and presented for acceptance as a new or a 100% control on the kind of tests that you have received poor results.

6 test Methods

6.1 For each test (except test macrostructure and testing the impact strength) of each selected pipe cut out one sample.

To control the macrostructure of the samples taken from both ends of the pipe.

For testing the impact strength of each selected pipe is cut on three samples. Toughness is defined as the arithmetic average of the results of tests of three samples.

On one of the samples allowed a reduction in the rate impact toughness 9.8 j/cm(1 kgf·m/cm).

6.2 Examination of the external and internal surfaces of pipes is carried out visually without the use of magnifying devices. The depth of the defects on the outer surface of the pipe test bar-a gauge or other method after Stripping defects.

Diameter and ovality of pipes controlled by a caliper-type stepper motor according to GOST 166, micrometer smooth MK-type according to GOST 6507, sheet clamps according to GOST 18360, 18365 GOST, straps are smooth, adjustable GOST 2216.

The wall thickness of the pipe is controlled by micrometer type MT according to GOST 6507, santomera according to GOST 11358, thickness gauge according to GOST 11358.

The length of the tubes test a measuring reel according to GOST 7502.

The curvature of the pipes checked straightedge according to GOST 8026 and a set of probes according to the normative documents.

Perpendicularity of end faces is ensured by the design of the equipment for cutting pipes.

The chamfer angle of the chamfer is controlled with a goniometer according to GOST 5378.

Allowed to control other devices according to the normative documents related to metrological characteristics which provide the required measurement accuracy.

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

6.4 Chemical analysis of steel pipe is carried out according to GOST 22536.0 to GOST 22536.6, 12344 GOST-GOST 12348, 12350 GOST, GOST 12352, 12354 series GOST — GOST 12359, 12361 GOST, GOST 28473.

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 tests carried out on specified standards.

6.5 tensile Test is carried out according to GOST 10006 on the longitudinal proportionate short samples. Speed tests to the yield strength should be not more than 10 mm/min, yield point is not more than 40 mm/min.

6.6 Test for impact strength is carried out according to GOST 9454 on the longitudinal samples of the types 11−14.

Allowed by agreement between manufacturer and consumer testing of impact strength at temperatures other than those specified in 4.3, on samples of different orientation (transverse) and another incision (types 1−10). In this case, the norms of toughness needs to be agreed between manufacturer and user.

6.7 Test tubes to bend is carried out according to GOST 3728.

6.8 Test tubes for flattening is carried out according to GOST 8695.

When discovering a tapered samples tiny tears or other minor defects are permitted to conduct a second test flattening on another sample taken from the same tube, with the preliminary removal of the surface layer of the sample (inner and outer) to a depth of not more than 0.2 mm for pipe diameters up to 108 mm and not more than 1 mm — for pipes with a diameter of 114 mm or more.

6.9 Hydraulic testing of the pipes is carried out according to GOST 3845 with time under pressure of not less than 10 s. the Test hydraulic pressure is determined according to GOST 3845. It should not exceed 20 MPa (200 kgf/cm). By agreement between the manufacturer and the consumer allowed to test the pipes under pressure more than 20 MPa (200 kgf/cm).

6.10 the macro-structure of metal pipes checked for cross ring ProTrainer the sample. Preparation of macrosections and etching is carried out according to GOST 10243.

6.11 non-destructive testing of tubes is carried out according to the method of manufacturer, duly approved.

7 Marking, packaging, transportation and storage

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