GOST 32598-2013

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  ГОСТ 32598-2013

GOST 32598−2013 Pipes of circular cross-section for water and gas. Specifications

GOST 32598−2013

Group В64

INTERSTATE STANDARD

COPPER TUBES OF CIRCULAR SECTION FOR WATER AND GAS

Specifications

Round copper tubes for water and gas. Specifications

ISS 23.040.15

Date of introduction 2015−01−01

Preface

Goals, basic principles and main procedure of works on interstate standardization have been established in GOST 1.0−92 «interstate standardization system. Basic provisions» and GOST 1.2−2009 «interstate standardization system. Interstate standards, rules and recommendations on interstate standardization. Rules of development, adoption, application, renewal and cancellation"

Data on standard

1 DEVELOPED by the Technical Committee for standardization TC 106 «Tsvetmetprokat», Scientific-research, project and design Institute for alloys and processing of nonferrous metals («JSC «Institute tsvetmetobrabotka»)

2 SUBMITTED by the Technical Committee for standardization TC 106 «Tsvetmetprokat"

3 ACCEPTED by the Interstate Council for standardization, Metrology and certification (minutes dated December 27, 2013 N 63-P)

The adoption voted:

Short name of the country MK (ISO 3166) 004−97	Country code MK (ISO 3166) 004−97	Abbreviated name of the national authority for standardization
Armenia	AM	Ministry Of Economy Of The Republic Of Armenia
Russia	EN	Rosstandart
Tajikistan	TJ	Tajikstandart

4 by Order of the Federal Agency for technical regulation and Metrology, dated 30 December 2013 N 2409-St inter-state standard GOST 32598−2013 introduced as a national standard of the Russian Federation from 1 January 2015.

5 INTRODUCED FOR THE FIRST TIME


Information about the changes to this standard is published in the annual reference index «National standards», and the text changes and amendments — in monthly information index «National standards». In case of revision (replacement) or cancellation of this standard a notification will be published in the monthly information index «National standards». Relevant information, notification and lyrics are also posted in the information system of General use — on the official website of the Federal Agency for technical regulation and Metrology on the Internet

Introduction

Pipe connection with external diameter not exceeding 108 mm is carried out by capillary soldering, including soldering, brazing, or by mechanical deformation and also with the use of press-fitting, self-locking and compression fittings.

Connection of pipes of an external diameter exceeding 108 mm is preferably carried out by welding or weld-brazing.

1 Scope

This standard applies to seamless drawn copper tubes with an outer diameter from 6 to 267 mm, to be used in hot and cold water, water (steam) heating, including floor and ceiling heating, cooling, sewage, sewage treatment plants and gas supply, and is also applicable to pipes for pre-insulation of pipes for any of the specified applications.

Tubes according to this standard can be used to transport other environments or in other areas of the application, the approval of special requirements for the use, supply and storage between the manufacturer and the customer.

The standard specifies the dimensions, technical requirements, acceptance rules, methods of control and testing, marking, packaging, transportation and storage of pipes.

Note — If insulation copper tube or device protective coatings should take into account the compatibility of other materials with copper.


Consumer features of copper tube:

1 fire — against the fire

Copper tubes according to this standard, i.e., without insulating coating, non-flammable, and are not tested for Flammability.

2 high temperature properties

Mechanical properties of copper pipes in heating systems and heating, for example in the range from room temperature to +120 °C, varies only slightly, and such changes can be neglected in calculations of loads and pressure. However, in all cases it is impossible to neglect the coefficient of thermal expansion of copper.

3 Weldability

Copper grade M1 °F perfectly welded, providing a strong homogeneous connection. For best results, welding should be entrusted to highly skilled professionals, to take into account the thermal conductivity and thermal expansion of copper, and especially copper welding of the brands with low content or absence of phosphorus (M1r, M2r).

2 Normative references

This standard uses the regulatory references to the following standards:

GOST 859−2001 Copper. Brand

GOST 2768−84 Acetone. Specifications

GOST 2991−85 wooden disposable Boxes for loads up to 500 kg. General specifications

GOST 2999−75 Metals and alloys. Method of measurement of hardness by Vickers

The Wire GOST 3282−74 General purpose low carbon steel. Specifications

GOST 3560−73 package steel Strip. Specifications

GOST 3728−78 Pipe. Test method for bend

GOST 3845−75 Pipe metal. Test method hydraulic pressure

GOST 4461−77 Reagents. Nitric acid. Specifications

GOST 6507−90 Micrometers. Specifications

GOST 7376−89* corrugated Cardboard. General specifications
________________
* On the territory of the Russian Federation acts GOST R 52901−2007 «corrugated Cardboard for packaging products. Technical conditions».


GOST 7502−98 metallic measuring tape. Specifications

GOST 8273−75 wrapping Paper. Specifications

GOST 8693−80 Pipe metal. Test method turn-up cuffs

GOST 8694−75 Pipe. The test method for distribution

GOST 8828−89 base Paper and paper double-layer waterproof packaging. Specifications

GOST 9557−87 flat wooden Pallet size 800x1200 mm. specifications

GOST 9569−2006 waxed Paper. Specifications

GOST 9717.1−82 Copper. Method of spectral analysis on a metal standard samples with photoelectric registration of spectrum

GOST 9717.2−82 Copper. Method of spectral analysis on a metal standard samples with photographic registration of spectrum

GOST 9717.3−82 Copper. Method of spectral analysis of oxide standard specimens

GOST 10006−80 Pipe metal. Test method tensile

GOST 10198−91 Boxes, wooden, for loads weighing over 200 up to 20000 kg. General specifications

GOST 10354−82 polyethylene Film. Specifications

GOST 12082−82 wooden Crates for loads weighing up to 500 kg. General specifications

GOST 13938.1−78 Copper. Methods for determination of copper

GOST 13938.2−78 Copper. Methods of determining sulphur

GOST 13938.3−78 Copper. Method of determination of phosphorus

GOST 13938.4−78 Copper. Methods of iron determination

GOST 13938.5−78 Copper. Methods for determination of zinc

GOST 13938.6−78 Copper. Methods for determination of Nickel

GOST 13938.7−78 Copper. Methods for determination of lead

GOST 13938.8−78 Copper. Methods for determination of tin

GOST 13938.9−78 Copper. Methods for determination of silver

GOST 13938.10−78 Copper. Methods for determination of antimony

GOST 13938.11−78 Copper. Method for the determination of arsenic

GOST 13938.12−78 Copper. Methods for determination of bismuth

GOST 13938.13−93 Copper. Methods of determining the mass fraction of oxygen

GOST 13938.15−88 Copper. Methods for determination of chromium and cadmium

GOST 14192−96 Marking of cargo

GOST 15102−75 the universal metal closed Container of nominal gross mass 5,0 t Technical specifications

GOST 15467−79 quality Control of products. Basic concepts. Terms and definitions

GOST 15846−2002 Products that are sent to the far North regions and equated areas. Packing, marking, transportation and storage

GOST 21650−76 means of fastening of package cargoes in transport packages. General requirements

GOST 22225−76 universal Containers with a gross weight 0,625 and 1,25 t. specifications

GOST 24047−80 Semi-finished products from nonferrous metals and their alloys. Sampling for tensile test

GOST 24231−80 non-ferrous metals and alloys. General requirements to selection and preparation of samples for chemical analysis

GOST 24597−81 the packaged goods. Basic parameters and dimensions

GOST 26663−85 transport Packs. Formation with the use of packaging. General technical requirements

GOST 26877−91 metal Products. Methods of measuring form deviations of

Note — When using this standard appropriate to test the effect of reference standards in the information system of General use — on the official website of the Federal Agency for technical regulation and Metrology on the Internet or in the annual information index «National standards» published as on January 1 of the current year, and the editions of the monthly information index «National standards» for the current year. If the reference standard is replaced (changed), when using this standard should be guided by replacing (amended) standard. If the reference standard is cancelled without replacement, then the situation in which the given link applies to the extent that does not affect this link.

3 Terms and definitions

This standard applies the following terms with respective definitions:

3.1 seamless round copper tube: a Hollow product of round in cross section, made of copper, having a uniform wall thickness, which at all stages of manufacturing has a continuous circumference, supplied in straight lengths or in coils.

3.2 average diameter: arithmetic mean of maximal and minimal values of the diameters measured at one cross section perpendicular to the tube axis.

3.3 out-of-roundness (deviation from circular shape): Difference between the largest and smallest values of the diameters measured at one cross section perpendicular to the tube axis.

3.4 raznoshennoy (thickness variation, the deviation from concentricity): the difference between the largest and smallest values of wall thickness measured in single cross-section perpendicular to the tube axis.

3.5 Bay: Cut product wound into a series of continuous turns.

3.5.1 Bay freespool: the Bay in which the coils are held in an orderly manner close to each other.

3.5.2 Bay layered orderly winding: the Bay in which the coils are wound in layers parallel to the axis of the Bay in such a way that the successive turns in each layer come one after the other.

3.5.3 Bay flat spiral winding: the Bay in which the product is wound spirally in the disc-shaped layer. Depending on the length of the pipe, this Bay may have multiple layers.

3.6 measuring length: the Product of a certain length, specified in the order, straight leg, or in the Bay.

3.7 permanent marking: Marking that is readable before the end of the installation, for example made by stamping, etching, engraving.

3.8 durable marking: the Marking will remain readable up to the moment of putting the plant in operation

Example: Ink marking.

3.9 residual carbon: Amount of carbon present in elemental form.

3.10 potential carbon content: the Amount of carbon present in the form of organic compounds (oils, fats, acids, alcohols, etc.).

3.11 total organic carbon: the amount of the residual carbon content and potential carbon.

3.12 preliminary insulation: Insulation applied to the pipe in a commercial way.

4 Assortment

4.1 Geometrical dimensions of the pipes are determined by the outer diameter, wall thickness and length.

4.2 Nominal outside diameters and nominal wall thicknesses shall conform to the values specified in table 1.


Table 1

In millimeters

Nominal outer diameter	The nominal wall thickness of
0,5	0,6	0,7	0,8	0,9	1,0	1,1	1,2	1,5	2,0	2,5	3,0
6,0	R	R	R
8,0	R	R	R
10,0	R	R	R	R
12,0	R	R	R	R
14,0	R	R
15,0	R	R	R
16,0	R
18,0	R	R
22,0	R	R	R	R	R
28,0	R	R	R	R
35,0	R	R	R
40,0	R
42,0	R	R	R
54,0	R	R	R	R
64,0	R
66,7	R	R
76,1	R	R
88,9	R
108,0	R	R
133,0	R	R
159,0	R	R
219,0	R
267,0	R
Notes 1 R — specifies the size of the pipes, which are massively used during establishment of this standard. 2 allowed for the manufacture of pipes of other sizes.

4.3 Outer diameter of the pipe and limit deviations of the outside diameter shall conform to the values specified in table 2.


Table 2

In millimeters

Nominal outer diameter	Limit deviation of outside diameter
Is applicable to the average diameter	Applies to the nominal diameter
all States	solid state	semi-solid state
From 6.0 to 18.0 incl.	±0,04	±0,04	±0,09
SV. 18,0 to 28,0 incl.	±0,05	±0,06	±0,10
SV. Of 28.0 to 54.0 incl.	±0,06	±0,07	±0,11
SV. To 54,0 76,1 incl.	±0,07	±0,10	±0,15
SV. To 76,1 88,9 cyl.	±0,07	±0,15	±0,20
SV. Of 88.9 to 108.0 incl.	±0,07	±0,20	±0,30
SV. To 108,0 159,0 incl.	±0,2	±0,7	±0,4
SV. 159,0 267,0 to incl.	±0,6	±1,5	-
Including ovality (deviation from circular shape). Note — tolerances for outside diameter of pipe in the soft condition only applies to the average diameter.

4.4 wall Thickness of pipes and tolerances for wall thickness shall conform to the values specified in table 3.


Table 3

In millimeters

Nominal outer diameter	Limit deviation for wall thickness, with a nominal wall thickness of
0,5	0,6	0,7	0,8	0,9	1,0	1,1	1,2	1,5	2,0	2,5	3,0
6,0	±0,05	±0,06	-	±0,08	-	±0,13	-	-	-	-	-	-
8,0	±0,05	±0,06	-	±0,08	-	±0,13	-	-	-	-	-	-
10,0	±0,05	±0,06	±0,07	±0,08	-	±0,13	-	-	-	-	-	-
12,0	±0,05	±0,06	±0,07	±0,08	-	±0,13	-	-	-	-	-	-
14,0	-	-	±0,07	±0,08	-	±0,13	-	-	-	-	-	-
15,0	±0,05	-	±0,07	±0,08	-	±0,13	-	±0,16	±0,20	-	-	-
16,0	-	-	-	±0,08	-	±0,13	-	±0,16	-	-	-	-
18,0	-	±0,06	-	±0,08	-	±0,15	-	±0,18	±0,23	-	-	-
22,0	-	±0,06	-	±0,08	±0,09	±0,15	±0,17	±0,18	±0,23	-	-	-
28,0	-	±0,06	-	±0,08	±0,09	±0,15	-	±0,18	±0,23	-	-	-
35,0	-	-	±0,07	±0,08	-	±0,15	±0,17	±0,18	±0,23	±0,30	-	-
40,0	-	-	-	-	-	±0,15	±0,17	-	-	-	-	-
42,0	-	-	-	±0,08	-	±0,15	-	±0,18	±0,23	±0,30	-	-
54,0	-	-	-	±0,08	±0,09	±0,15	-	±0,18	±0,23	±0,30	-	-
64,0	-	-	-	-	-	-	-	-	±0,23	±0,30	±0,38	-
66,7	-	-	-	-	-	±0,15	-	±0,18	±0,23	±0,30	±0,38	-
76,1	-	-	-	-	-	-	-	±0,18	±0,23	±0,30	±0,38	-
88,9	-	-	-	-	-	-	-	-	-	±0,30	±0,38	±0,45
108,0	-	-	-	-	-	-	-	±0,18	±0,23	±0,30	±0,38	±0,45
133,0	-	-	-	-	-	-	-	-	±0,23	±0,30	-	±0,45
159,0	-	-	-	-	-	-	-	-	±0,23	±0,30	-	±0,45
219,0	-	-	-	-	-	-	-	-	-	-	-	±0,45
267,0	-	-	-	-	-	-	-	-	-	-	-	±0,45
Including deviation from concentricity. Note Concentricity (uniformity of wall thickness) is controlled by the limiting deviations for wall thickness.

4.5 Theoretical weight of 1 m of pipes with nominal diameter and nominal wall thickness are given in Appendix A.

4.6 the length of the pipe manufactured lengths in lengths and in coils. Form of delivery, length and tolerances for the length of the pipes are given in table 4.


Table 4

Form of delivery	Nominal outside diameter, mm					Length, mm					Limit deviation of length, mm
In the bays	From	6,0	to	22,0	incl.	To	15000	incl.	+300
In the bays	From	6,0	to	22,0	incl.	SV.	15000	incl.	+600
In segments	From	6,0	to	108,0	incl.	From	1500	to	5000	incl.	+50
In segments	From	108,0	to	267,0	incl.	From	1500	to	5000	incl.	+70
Note — it is possible to supply tubes in coils length is a multiple of 25 m. maximum deviation along the length of the bays is a multiple of the length of ±1000 mm.

The legend of pipes are placed according to the scheme:

Use the following abbreviations:

method of manufacture:	drawn — D;
sectional shape:	round — CU;
condition:	soft — M; semi-solid — P; solid — T;
dimensions:	the outer diameter and wall thickness;
length:	dimensional — CD;
form of delivery:	segments; Bay: the pipe is in the Bay freespool — BT; the pipe is in the Bay layered orderly winding — BU; pipe in coil a flat spiral winding — BS.

Examples of symbols of pipes:

Tube, drawn, round, soft, an outer diameter of 8.0 mm and wall thickness 1.0 mm, length 15000 mm, in coils layer-by-layer winding of copper grade M1r:

Pipe DCRM 8,0x1,0х15000 Bay BU M1r GOST 32598−2013

Tube, drawn, round, firm, of an external diameter of 28 mm and a wall thickness of 1.5 mm, length 5000 mm segments of copper grade M1r:

Pipe DCRT 28,0 x 1,5 x 5000 segments M1r GOST 32598−2013

5 Technical requirements

5.1 Pipe manufactured in accordance with the requirements of this standard for technological regulations approved in the prescribed manner.

5.2 Pipe made out of copper the brands M1r, M1 °F, M2r according to the GOST 859 with the chemical composition shown in table 5, and the copper grades Cu-DHP and SF-Cu with the chemical composition shown in table 5.

5.3 All materials used for the manufacture of pipe under this standard must be authorized by national health authorities.


Table 5 — Chemical composition of copper brands M1r, M1 °F, M2r

Percentage

Marking stamps	Mass fraction of element
Copper + silver, no less	Impurity, not more than
Bismuth	Iron	Nickel	Zinc	Tin	Antimony	Arsenic	Lead	Sulfur	Oxygen	Phosphorus
M1r	99,90	0,001	0,005	0,002	0,005	0,002	0,002	0,002	0,005	0,005	0,01	0,002−0,012
M1F	99,90	0,001	0,005	0,002	0,005	0,002	0,002	0,002	0,005	0,005	-	0,012−0,040
M2r	99,70	0,002	0,05	0,2	-	0,05	0,005	0,01	0,01	0,01	0,01	0,005 to 0,060
Cu-DHP	99,90	-	-	-	-	-	-	-	-	-	-	0,015−0,040
SF-Cu	99,90	-	-	-	-	-	-	-	-	-	-	0,015−0,040
For the brand SF-Cu mass fraction of copper is specified with no silver content. Note — copper grade M2r used for the manufacture of drinking water pipes, the contents of the mass fraction of Nickel should be no more than 0,002%.

5.4 Pipe is manufactured in soft, semi-solid and solid state. Mechanical properties of pipes shall conform to the requirements specified in table 6.


Table 6

The condition of the material	Nominal outside diameter, mm		Temporary resistance , MPa (kgf/mm), not less	Elongation ,%, not less	The Vickers hardness HV 5/30
min	max
Soft	6	54	220 (22,5)	40	40−70
Semi-solid	6	66,7	250 (25,5)	30	75−100
6	159	20
Solid	6	267	290 (29.5 in)	3	at least 100
Notes 1 hardness Data are not mandatory requirements of this standard, they are listed as reference data. 2 Tubes soft with a wall thickness of 0.7 mm or less — test for hardness for Vickers HV3/30.

5.5 Outer and inner pipe surface must be clean, free from deep scratches and marks that are in the control sweep no output tubes for maximum deviations in size. Pipe should not have cracks and breaks, leaks and delamination. Inner surface of the pipe should not contain carbon films.

The content of carbon residues on the internal surfaces of pipes shall not exceed the values for the range and conditions specified in table 7.


Table 7 — Number carbon residue allowable on the inner surface of the pipe

Nominal outside diameter, mm	The condition of the material	Quantitative method — Total organic carbon, mg/l, max.	Qualitative method — a Test for the presence of the carbon film
From 10 to 54 incl.	Soft	0,20	Yes
Semi-solid	0,20	Yes
Solid	0,20	Yes
SV. 54	Semi-solid	0,20	Yes
Solid	1,0	No
Note — Quantitative analysis of carbon content or test for the formation of carbon films is at the discretion of the manufacturer, unless it is specifically mentioned delivery conditions.

5.6 Pipe supplied in sections must be trimmed evenly and must not have significant according to GOST 15467 Burr on the cutting plane.

Cocina cutting of pipes shall not exceed the values given in table 8.


Table 8

In millimeters

Nominal outer diameter	Cut end Squareness, mm, not more
From 6.0 to 18.0 incl.	2
SV. 18.0 to 42.0 incl.	3
SV. 42,0 to 76.1 incl.	4
SV. Of 76.1 to 108.0 incl.	5
SV. To 108,0 267,0 incl.	7

5.7 Ovality and raznoshennoy pipes should not display their dimensions limit deviations for outer diameter and wall thickness.

Ovality is not set for pipes soft state and in the bays.

5.8 Pipe supplied in sections must be straightened. Curvature of 1 m of pipe length shall conform to the requirements given in table 9.


Table 9

In millimeters

Nominal outer diameter	Curvature of 1 m length, no more
12.0 to 54.0 incl.	6
SV. To 54,0 76,1 incl.	7
SV. 76.1% to 267,0 incl.	9

The overall curvature of the pipe must not exceed the curvature of 1 m length for a total length of the pipe in meters.

The curvature is not set:

— for pipes made in the coils;

— for pipes in semi-solid or a solid with an outer diameter less than 12 mm;

— pipe the soft state.

5.9 Pipe must withstand the test bend. A sample is considered satisfactory if, after bending it will not be visually detected violation of the integrity of the metal in the form of breaks or tears with a metallic sheen.

5.10 Pipe must withstand the distribution without the formation of cracks and tears by increasing the outer diameter of pipes:

for the soft state by 25%;

— for semi-solid state at 15%.

5.11 Pipe must withstand the test turn-up cuffs. The sample is considered satisfactory if, after flanging there are no cracks or tears with a metallic luster, visible without using the magnifying devices.

5.12 Test bends, the distribution and turn-up cuffs depending on the outer diameter and the condition of the pipe material indicated in table 10.


Table 10

Nominal outside diameter, mm	The condition of the material	Test
on the bend	on the hand	the turn-up cuffs
From 6.0 to 18.0 incl.	Soft	-	M	And
Semi-solid	-	M	-
Solid	M	-	-
SV.Of 18.0 to 54.0 incl.	Soft	-	And	And
Semi-solid	-	And	-
Solid	-	-	-
SV. To 267,0 54,0 cyl.	Soft	-	-	-
Semi-solid	-	-	-
Solid	-	-	-
For the nominal wall thickness of not less than 1.0 mm. Notes 1 M — mandatory. 2 And upon agreement of the consumer and the manufacturer.

5.13 Pipe must be sealed.

6 acceptance Rules

6.1 Pipe take parties. The party must consist of tubes of one brand of copper, one size and one material condition shall be furnished in one document about quality that contains:

is the trademark or name and trademark of manufacturer;

— the name of the country of manufacture;

— legal address of the manufacturer and (or) the seller;

— the symbol of the pipes;

— test results (as required);

— the batch number;

— the weight of the batch.

The weight of the batch should not exceed 5,000 kg.

6.2 Amount of acceptance testing, the number of controlled tubes is given in table 11.


Table 11

Name of the indicator	The item number of the standard	Item number methods of control and testing	The number of controlled tubes
1 mark the product	8.1−8.3	7.1	100% from the party
2 Transport labeling	8.4	7.1	100% from the party
3 Pack	8.5−8.9	7.1	100% from the party
4 Quality
the outer surface,	5.4	7.1	100% from the party
inner surface,	5.4	7.1, 7.3	5 tubes from the party
cut surface	5.5	7.1	5 tubes from the party
5 Outer diameter, ovality,	4.3, 5.6	7.2	5 tubes from the party
the thickness of the wall, raznoshennoy	4.4, 5.6	7.4	5 tubes from the party
6 Length of pipe,	4.6	7.5	3 tubes from the party
cut end Squareness, mm,	5.5	7.5	5 tubes from the party
the curvature of the pipe	5.7	7.5	5 tubes from the party
7 test Method
on fold,	5.8	7.8	3 tubes from the party
on the hand,	5.9	7.9	3 tubes from the party
the turn-up cuffs	5.10	7.7	3 tubes from the party
8 Chemical composition	5.2	7.11	2 pipes from the party
9 Mechanical properties	5.3	7.6	3 tubes from the party
10 Tightness Outer pipe diameter from 6.0 to 267,0 mm incl.	5.12	7.10	100% from the party

Allowed to the manufacturer upon receipt of unsatisfactory results to monitor each pipe (the Bay) for the parameter that you have received poor results.

6.3 If unsatisfactory test results of the sample inspection of at least one of the indicators it is carried out re-testing at twice the sample taken from the same batch.

Upon receipt of unsatisfactory results, re-testing, and test results with the continuous control batch tubes is rejected.

7 Methods of inspection and testing

7.1 inspection of the external and internal surfaces of pipes, surfaces of cutting, labeling and packing is carried out visually, without the use of magnifying devices.

7.2 Measurement of outer diameter is carried out with a micrometer according to GOST 6507. The diameter measurement is carried out in sections spaced from the ends of the pipe at a distance not less than the outer diameter, at three points on any section of the pipe.

According to the results of actual measurements, determine the maximum and minimum values of diameters in the measured cross sections and determine the average outer diameter.

The measurement of the outer diameter of the pipe in the bays is on a straight pipe ends.

In place of marking a measurement of the cross section of the pipe is not possible.

7.3 For quality control of internal surface of pipes with a diameter up to 28 mm inclusive and tubes made in the bays, from each selected pipe (coils) must be selected one sample with a length of not less than 150 mm Samples cut lengthwise into two parts and examine.

The inspection of internal surfaces of pipes with a diameter greater than 28 mm is carried out on an illuminated screen.

For monitoring the presence of carbon film and content the carbon residues on the internal surfaces of pipes with outer diameter up to 22 mm should be selected for one sample unit not less than 300 mm For pipes with outer diameter more than 22 mm and a wall thickness of 1 mm, internal surface area of samples should be not less than 2000 mm.

The control of internal surface of pipes for the presence of carbon films is carried out according to the method in accordance with Annex B.

The control of the content of carbon residues on the internal surfaces of pipes is carried out in accordance with Annex V.

7.4 To control the wall thickness of each of the controlled tubes with internal diameter less than 8 mm cut samples of length not less than 150 mm, cut them lengthwise into two parts and measure with a micrometer according to GOST 6507.

The measurement of wall thickness of pipe inside diameter of 8 mm and more is carried out on both sides of the tube (specimen) at a distance of not less than 5 mm from the ends of the pipe. According to the results of actual measurements, determine the maximum and minimum values wall thickness in the measured sections and determine raznoshennoy as the difference between the largest and smallest values.

Allowed to control the diameter and wall thickness of tubes and other measuring instruments required accuracy.

7.5 the length of the tubes in segments measure measuring tape according to GOST 7502. The measurement is performed at least two times from opposite sides of the cylindrical surface of the pipe.

Pipe length in coil is guaranteed by the manufacturer.

Curvature, the cosine of the cut measured in accordance with GOST 26877.

7.6 For tensile tests or hardness from each selected pipe (coils) cut off one sample.

The selection and preparation of samples for tensile tests carried out according to GOST 24047.

The tensile test is carried out according to GOST 10006.

Test the Vickers hardness is carried out according to GOST 2999.

7.7 testing turn-up cuffs from each selected pipe cut off one sample.

Test turn-up cuffs is carried out according to GOST 8693.

The amount of flanging shall not be less than 30% of the inner diameter of the pipe.

7.8 testing the bend from each selected pipe (coils) cut off one sample. The test bend is carried out according to GOST 3728.

The bend angle of the sample pipe taking a 90°. The bending radius of the pipe is given in table 12.


Table 12

In millimeters

Nominal outer diameter	The bending radius of the pipe on the middle line
6	30
8	35
10	40
12	45
14	50
15	55
16	60
18	70

7.9 testing the distribution of each selected pipes (coils) cut off one sample. Test distribution is carried out according to GOST 8694. For tests used a mandrel with a taper angle of 45°.

7.10 Each pipe batch shall be tested for leaks by one of the following methods:

method of eddy current testing of pipes up to 42 mm inclusive according to the method set out in Annex G;

— hydraulic pressure of 5 MPa (50 kgf/cm) for 10 s according to GOST 3845;

— pneumatic pressure 0.4 to 0.5 MPa (4 to 5 kgf/cm) for 5 s in a tub filled with water, with no leakage of air from the tube.

Test method for tightness is established by agreement between manufacturer and user.

7.11 To determine the chemical composition of each selected pipes (coils) is cut on the same model.

Sampling for the determination of chemical composition is carried out according to GOST 24231.

Chemical composition analysis is carried out according to GOST 13938.1 — 13938.13 GOST, GOST 13938.15, GOST 9717.1 — GOST 9717.3 or other methods to ensure the specified accuracy.

Allowed on the factory sampling carried out by the molten metal.

If there is disagreement in the assessment of the chemical composition analysis is carried out according to GOST 13938.1 — 13938.13 GOST, GOST 13938.15.

7.12 permitted the manufacturer to use other testing methods, providing the required accuracy. If there is disagreement in the definition of indicators monitoring is carried out by methods specified in this standard.

8 Marking, packaging, transportation and storage

8.1 Every pipe with a diameter of from 10 to 54mm inclusive is marked throughout the length of the increments between neighboring elements are not more than 600 mm.

For pipes of other sizes marked on both ends of the pipe.

The marking method must ensure its safety during transportation and operation at the consumer. Marking on pipe shall include the following information:

— the designation of this standard;

— the nominal dimensions of the cross section (outer diameterand wall thickness);

— the brand and the condition of the material;

is the trademark or name and trademark of manufacturer;

— information on the production year and batch number.

8.2 marking of the bays needs to be performed on the labels glued on the outside of package, and shall contain the symbol and batch number.

8.3 the Label that you attach to each package of tubes must contain the following information:

is the trademark or name and trademark of manufacturer;

— the symbol of the pipes;

— the batch number;

the weight of the party.

8.4 Transport marking — according to GOST 14192 with the application of manipulation sign «Protect from moisture».

8.5 In wooden boxes Packed pipe in segments and in the bays, the condition of the material and the dimensions of which are listed in table 13.


Table 13

In millimeters

The condition of the material	The nominal wall thickness of	Nominal outer diameter
Soft	To 0.9	All sizes
1; 1,1; 1,2	10 or more
1,5	20 or more
2; 2,5	60
3	80 or more
Semi-solid and solid	0,8;	All sizes
1	20 or more

The mass of pipes in coils should not exceed 80 kg.

On agreement between the consumer and the manufacturer allowed the mass of pipes in coils of more than 80 kg Minimum and maximum mass bays may be established by agreement of a customer and the manufacturer.

Pipe in segments of an external diameter not exceeding 40 mm tied into bundles weighing not more than 80 kg.

Each bundle and the Bay of the pipes should be tied with wires of diameter not less than 1.2 mm or twine made of synthetic materials in the normative documentation not less than two turns and no less than two places (the Bay in three places evenly) so as to prevent the mutual movement of pipes. The ends of the wire connected by twisting at least five turns.

8.6 Pipe in coils Packed in polyethylene film and placed in wooden crates, pallets or boxes made of corrugated cardboard.

Allowed when there is no overload in the path of the conveying pipe in covered wagons and containers in bundles without packing in boxes.

The packaging should protect the pipelines.

As containers and packaging materials can be used:

— boxes of GOST 2991, GOST 10198;

— wooden crates according to GOST 12082;

containers according to the GOST 15102, GOST 22225;

— wire according to GOST 3282;

tape according to GOST 3560;

— corrugated cardboard according to GOST 7376;

— wooden pallets according to GOST 9557;

— polyethylene film according to GOST 10354.

Allowed other types of packaging and packaging materials, ensuring the safety of pipes during transport, in the normative documentation.

8.7 Packaging tubes, sent to the far North and equated to them districts, — according to GOST 15846.

8.8 Consolidation packages in overpacks carried out in accordance with the requirements of GOST 26663.

Dimensions of packages — according to GOST 24597.

Fastening means in the transport packets according to GOST 21650.

The maximum allowable weight of cargo space 5000 kg.

When transporting in boxcars, the mass of the package shall not exceed 1250 kg.

Packaging is carried out on pallets according to GOST 9557 or without pallets using bars section not less than 50x50 mm with tying wire with diameter at least 3 mm or with a tape of size not less than 0,3х30 mm or using a sling also packageable. The ends of the wrapping wire fasten twist of five turns, the tape is in the castle.

8.9 In each container or in one of the drawers of the container must be nested packing list, which should include the following information:

is the trademark or name and trademark of manufacturer;

— the name of the country of manufacture;

— legal address of the manufacturer and (or) the seller;

— the symbol or grade of pipe copper, pipe size, condition of material, designation of this standard;

— the batch number;

stamp of technical control or the technical controller;

— the date of manufacture.

8.10 Pipe transporterowych all types of transport in covered vehicles in accordance with cargo carriage regulations applicable to transport of this species.

For pipes longer than 2000 mm of the vehicle is determined in accordance with cargo carriage regulations applicable to transport of this species.

8.11 Pipe should be stored indoors and shall be protected from mechanical damage, moisture and active chemical substances.

Under specified storage conditions consumer properties of pipes during storage are not changed.

Annex a (informative). Theoretical weight of 1 m of pipes with nominal diameter and nominal wall thickness

Appendix A
(reference)

Table A. 1

Nominal external diameter, mm	Theoretical weight of 1 m pipe, kg, at wall thickness, mm
0,5	0,6	0,7	0,8	0,9	1,0	1,1	1,2	1,5	2,0	2,5	3,0
6,0	0,077	0,091	-	0,116	-	0,140	-	-	-	-	-	-
8,0	0,105	0,124	-	0,161	-	0,196	-	-	-	-	-	-
10,0	0,133	0,158	0,182	0,206	-	0,252	-	-	-	-	-	-
12,0	0,161	0,191	0,221	0,250	-	0,307	-	-	-	-	-	-
14,0	-	-	Is 0.260	0,295	-	Of 0.363	-	-	-	-	-	-
15,0	0,203	-	0,280	0,317	-	0,391	-	0,463	0,566	-	-	-
16,0	-	-	-	0,340	-	0,419	-	0,496	-	-	-	-
18,0	-	0,292	-	0,385	-	0,475	-	0,563	0,692	-	-	-
22,0	-	0,359	-	0,474	0,531	0,587	0,642	0,698	0,859	-	-	-
28,0	-	0,459	-	It was 0.608	0,682	0,755	-	0,899	1,111	-	-	-
35,0	-	-	0,671	0,765	-	0,950	1,042	1,133	1,404	1,844	-	-
40,0	-	-	-	-	-	1,090	1,196	-	-	-	-	-
42,0	-	-	-	0,921	1,146	-	1,368	1,698	2,236	-	-
54,0	-	-	-	1,189	1,336	1,481	-	1,771	2,201	2,906	-	-
64,0	-	-	-	-	-	-	-	-	2,620	3,465	4,297	-
66,7	-	-	-	-	-	1,836	-	2,197	2,733	3,616	4,485	-
76,1	-	-	-	-	-	-	-	2,512	3,127	4,142	5,142	-
88,9	-	-	-	-	-	-	-	-	-	4,857	6,036	7,202
108,0	-	-	-	-	-	-	-	3,582	4,464	5,925	Have 7.371	8,803
133,0	-	-	-	-	-	-	-	-	5,512	7,322	-	10,899
159,0	-	-	-	-	-	-	-	-	6,602	8,775	-	13,079
219,0	-	-	-	-	-	-	-	-	-	-	-	18,109
267,0	-	-	-	-	-	-	-	-	-	-	-	22,133
Notes 1 Theoretical mass calculated for the nominal diameter and nominal wall thickness. 2 the Density of copper is taken equal to 8.9 g/cm.

Appendix B (mandatory). Test for the presence of the carbon film

Appendix B
(required)

B. 1 preparing the sample for test

The outer surface of the sample tubes, is designed for testing must be clean.

To clean the outer surface of the sample using chemical or mechanical method.

B. 1.1 Chemical cleaning method

B. 1.1.1 With one end of the sample tube is inserted acid-resistant cap.

A sample tube with a plug dipped in concentrated nitric acid according to GOST 4461 and kept him there for at least 30 seconds, after which the sample is washed with tap water, then distilled water. The specimen is removed and dried in air.

B. 1.1.2 From the end of the sample tube with the cap cut off a segment of length at least 25 mm and remove it.

B. 1.1.3 the Remaining sample is cut lengthwise into two pieces and degreased by immersion in acetone GOST 2768.

B. 1.2 Mechanical cleaning method

B. 1.2.1 With the sample surface removes a thin layer by machining on a lathe used only for these purposes.

After machining, the sample is cut lengthwise into two pieces and degreased by immersion in acetone.

B. 2 testing

B. 2.1 From the cleaned sample tubes cut cut of such length that the area of its inner surface was not less than 2000 mm.

B. 2.2 Fat-free sample is placed on the inside surface up in a small bowl with a flat bottom made of glass or white porcelain and coated with 25% (v/v) solution of nitric acid at ambient temperature.

B. 2.3 When the acid becomes of a blue color, the specimen is removed and washed in distilled water to remove the acid any particles attached to the sample.

B. S test Results

B. 3.1 observation of the film formed on the surface of the acid is performed using a microscope at tenfold magnification.

Initial observation reveals the presence of a film or particles on the surface of the acid. If nothing is found or some rare, fine particles, test designed.

If the surface is clearly visible floating film, it may be a film of carbon or oxide.

To distinguish the carbon and the oxide, acid with the presence of a floating film needs to be brought to the boil, a slow boil should take about 5 min to dissolve any oxide layers.

If you recheck the tape was removed or remained only small, sparse particles, the test is designed. If there is no change in the size of the film, then it’s carbon, and the test is not met.

Annex b (mandatory). Combustion method for determining the presence of carbon on the inner surface of tubes

The App
(required)

B. 1 Basic principle

B. 1.1 Combustion of carbon present on the inner surface of the pipe samples, performed at a given temperature for a given oxygen consumption. The carbon content is expressed in the following terms: residual carbon content, potential, and total organic carbon. This technique describes the method of combustion and three methods that measure the resulting carbon dioxide (carbon dioxide).

Determine the residual carbon content, total carbon content or residual and total organic carbon.

Potential carbon content is obtained by computing (the total carbon content minus the residual carbon content).

B. 2 Preparation of samples to test

V. 2.1 to determine the carbon content perform operations, the sequence of which is defined in B. 2.1.1, method A or B, and (or) in V. 2.1.2.

V. 2.1.1, the Residual carbon content

Method And

a) to take samples for V. 2.2;

b) clean the inside surface of the sample V. 2.3;

a) cleanse the outer surface of the sample V. 2.4;

g) to cut samples for V. 2.5,

or

Method B

a) to take samples for V. 2.2;

b) clean the outer surface of the sample V. 2.4;

a) cleanse the inner surface of the sample V. 2.3;

g) to cut samples for V. 2.5.

V. 2.1.2 Total carbon content

a) to take samples for V. 2.2;

b) clean the outer surface of the sample V. 2.4;

C) to cut samples for V. 2.5.

V. 2.2 Selection of samples for testing

V. 2.2.1 Cut from the pipe sample length of 300 mm.

The cutting tool should be no dyes, grease or other carbon impurities.

Strip the ends of the samples.

V. 2.3 cleaning the interior of the sample surface

V. 2.3.1, delete the sample in a bath of trichloroethylene or trichloroethane for 5 min at room temperature or for 2 min in the boiling solution.

To load a sample of at least 30 with the second tub with the same solution.

Remove the samples from the bath and place them vertically above the evaporation chamber or in an oven (thermostat) until then, until the solution completely evaporated.

V. 2.4 cleaning of the outer surface of the sample

V. 2.4.1 the Outer surface of the sample tubes, is designed for testing must be clean.

To clean the outer surface of the sample using chemical or mechanical method.

To determine the amount of amendments idle experience in V. 4.5 and for use in cases of conflict, use only chemical cleaning method given in B. 2.4.2.

V. 2.4.2. Chemical cleaning method

V. 2.4.2.1 With one end of the sample tube is inserted acid-resistant cap.

A sample tube with a plug dipped in 50% (v/v) nitric acid solution and kept it there for at least 30 seconds, after which the sample is washed with tap water, then distilled water, and at the end dipped for 2−3 min in a bath of distilled water with a temperature of at least 80 °C.

The specimen is removed and dried in air.

V. 2.4.2.2 From the end of the sample tube with the cap cut off a segment of length at least 25 mm and remove it.

V. 2.4.2.3 the Remaining sample is cut lengthwise into two pieces and degreased by immersion in acetone GOST 2768.

V. 2.4.3 a Mechanical method of cleaning

V. 2.4.3.1 With the sample surface removes a thin layer by machining on a lathe used only for these purposes.

After machining, the sample is cut lengthwise into two pieces and degreased by immersion in acetone.

V. 2.5 Cutting samples for test

8.2.5.1 Prepare the sample for testing using one of the procedures referred to in V. 2.5.2 and V. 2.5.3, and then stored the samples for test in uncontaminated environment, such as in a desiccator containing pallets with sodium hydroxide until the time of the test.

V. 2.5.2 Pipe diameters not exceeding the diameter of the furnace

V. 2.5.2.1 From the end of the sample tube with the plug, cleaned by chemical method, cut cut of such length that the area of its inner surface was not less than 2000 mm.

To achieve a clean cut perpendicular to the axis of the pipe, it is recommended to use a circular saw for cross cutting.

The internal surface area of the sample for testing is determined from the value of the average inner diameter and length of the sample measured with an accuracy of 0.1 mm.

If the specimen for testing long temperature zones of the glow of combustion device, described in V. 3), the sample is cut across into two parts and place both parts at the same time in the zone of the temperature of luminescence.

V. 2.5.3 Pipe diameters exceeding the diameter of the furnace

V. 2.5.3.1 If the furnace diameter less than the diameter of the pipe, you should use the methods stated below:

a) Method of longitudinally cutting

Cut cut sample pipe of such length that the area of its inner surface was not less than 2000 mm.

Weigh the cut sample to the nearest 0.01 g .

The internal surface area of the sample is determined from the value of the average inner diameter and length of the sample measured with an accuracy of 0.1 mm.

Using skim saw blade, cut a sample cut longitudinally into two halves. Bend each half so that it was possible its longitudinal placement in the oven. This flexing can be made between the clamping jaws of pincers equipped with aluminum or clips from alternative materials, previously degreased using trichloroethylene or trichloroethane. The materials for the clamps needs to be without compromising their purity.

Weigh the two halves of the sample for testing to the nearest 0.01 g .

The internal surface area of the sample for testing, which shall be not less than 2000 mm, calculated by the formula

. (V. 1)

b) a Method of flattening

If the specimen for testing with the internal surface area of not less than 2000 mmcan be obtained by flattening, the flattening operation is carried out between the clamping jaws of pincers equipped with aluminum or clips made of other materials, previously defatted by trichloroethylene or trichloroethane.

B. 3 Method for the combustion of products containing carbon

V. 3.1, the Combustion is carried out in a quartz tube in a current of oxygen, with a minimum degree of purity is 99.995%.

A combustion device includes:

a) the system for oxygen supply and purification, which can guarantee the degree of purity is 99.995%. This system generally includes:

— refined furnace (primary (pre -) combustion), which includes a quartz tube filled with copper oxide, which allows the temperature from 450 °C to 500 °C, which is necessary to maintain;

— a trap for HO;

— a trap for CO;

b) a holding cell for a sample for testing;

C) a chamber for reburning with the pipe for the chemical reaction of quartz tube furnace (about 600 mm long), the temperature should be not less than 750 °C.

B. 4 Methods for determination of carbon

V. 4.1, There are three main methods for determination of carbon:

— The method using a hydroxide of tetrabutylammonium, see V. 4.2;

Method to determine by measuring the differential conductivity, see V. 4.3;

Method of determining by spectrometry the absorption of infrared rays, see V. 4.4.

Can be used other methods (for example, coulometric method), if their sensitivity is not less than the above.

In each case the correction of the idle experience should be determined in accordance with V. 4.5.

V. 4.2, the Method using a hydroxide of tetrabutylammonium

V. 4.2.1 the Absorption of generated carbon dioxide (carbon dioxide) with a solution of ethanolamine. Neutralization of acidity, the resultant standard (methane) solution of tetrabutylammonium hydroxide and determination of the carbon content.

The accuracy of readings ±0.01 mg/DM.

V. 4.3 Method of determination by measuring the differential conductivity

V. 4.3.1 Measurement of the difference in the electrical conductivity of the sodium hydroxide solution in front of and to the absorption of generated carbon dioxide (carbon dioxide).

Accuracy of measurements ±0,02 mg/DM.

V. 4.4. the Method of determining by spectrometry the absorption of infrared rays

V. 4.4.1 Direct (direct) determination of the carbon content through automatic analysis of absorption of infrared rays generated carbon dioxide (carbon dioxide).

The device generally includes a mechanism of combustion described in section V. 3

The accuracy of readings ±0.01 mg/DM.

V. 4.5 determination of the amendments idle experience

V. 4.5.1 the Value of the blank must be determined at the beginning of the test or during the test.

The size of the workpiece, expressed in mg/DM, must be subtracted from the individual measurements of each sample for testing.

Procedure:

— cut sample for test of such length that its inner surface area was not less than 2000 mm;

— fully drop it in the bath with 50% (v/v) solution of nitric acid and kept it there for at least 30 seconds so that it was protable and with internal and external parties;

— removed sample for testing from the bath using forceps, and washed it under running water, then with distilled water, and at the end dipped for 2−3 min in a bath of distilled water at a temperature of at least 80 °C;

sample store it in a desiccator containing pallets of sodium hydroxide, until the time of measurement;

— determine the area of the inner surface of the specimen for test from the value of the average inner diameter and length of the sample measured with an accuracy of 0.1 mm;

— use a method of determination of carbon selected for testing in accordance with B. 4.2, V. 4.3 or V. 4.4.

The size of the workpiece will be the average of the values obtained from two samples for test.

If satisfactory the preparation of the correction blank is obtained experience not more than 0.02 mg/DM. If you receive large quantities, the preparation of the sample for testing and the mechanism of the workpiece must be checked.

V. 5 Results

V. 5.1 whichever method is used, the value of the carbon content should be expressed in mg/las the arithmetic mean of the values obtained by testing two samples.

B. 6 accuracy Control

V. 6.1 the Equipment must be checked at beginning of test and then at least once a day with continuous use, using samples of D-mannitol is known to the sample (analysis), except if you use spectrometry the absorption of infrared rays, when the alternative test may be conducted COin accordance with the manufacturer’s instructions. However, when using the spectrometer of the absorption of infrared rays apparatus for testing should be checked at least twice a year and after 1000 measurements with continuous use, using samples of D-mannitol is known to the sample (analysis).

Appendix d (mandatory). Method of eddy current testing of pipes

Appendix D
(required)

G. 1 Purpose and scope

G. 1.1 this technique is used to control the eddy current pipe of non-ferrous metals and alloys with the purpose of detecting the discontinuity of the material (in the form of cracks, delaminations, bubbles, shells, scratches, holes, dents, non-metallic inclusions etc.) on the outer and inner surfaces of the pipe and the thickness of the material.

G. 1.2 Method is used for tubes with outer diameter from 6 to 42 mm and defect detection of the wall thickness to a depth of 3 mm from the outer surface.

2 the equipment Used

2.1 For inspection of pipes used:

— eddy current flaw detector;

— set walk-through probes of different diameters;

— drawl-centering device with automatic sorting or automatic marks defective areas;

— a reference sample.

2.2 For control you can use any type eddy current flaw detector, designed to work with continuous eddy current sensors, providing control at frequency from 4 to 30 kHz, operating at ambient temperature from 5 °C to 50 °C.

2.3 Eddy current passing the inverter is installed on the drawl-centering device so that the pipe was centered relative to the electrical center of the coil passage of the transducer. Indicator electrical centering is the independence of signal intensity from the position of the discontinuities on the circle. The inconsistent may be either natural (previously discarded tube) and artificial.

2.3.1 Recommended internal bore of the Converter to choose so as to get the maximum hole fill pipe.

2.3.2 Equipment, which is used in the control pipes, must contain the device used to suppress the signal of the end effect.

2.4 Broaching centering device is an Electromechanical means of feed pipe passing through the Converter.

The device must support the tube concentrically relative to the electrical center of the coil passage of the transducer.

2.5 Reference model should have three holes drilled radially through the pipe wall at an angle of 0°, 120° and 240°, one in each of the three transverse planes in accordance with figure G. 1.

Holes must be located from each other at a distance sufficient to flaw recorded individual signals from each hole without interference from the ends of the sample.

Allowed the production and use of a reference sample with one hole, which should pass through the entrance of the Converter three times, turn on each subsequent transmission hole of the sample at 120° relative to its previous position.

Figure D. 1 — Reference model with three holes

2.5.1 the Reference model is used to configure the detector for minimum sensitivity of the control but ensuring a reliable identification of all three options on the sample of artificial discontinuities for periodic testing of the controls.

2.5.2 Sizes of diameters of drilled holes are given in table G. 1.


Table G. 1

In millimeters

Nominal outside diameter controlled pipe					The diameter of the drilled holes
nominal	limit deviations
From	6,0	to	28,0	incl.	1,2	±0,05
SV.	28,0	to	42,0	incl.	2,0

2.5.3 Reference samples made from tubes of the same alloy, condition, size, and controlled the pipe. Allowed divergence of the reference model with controlled only the pipes of wall thickness, but not more than 0.5 mm.

D. 3 Preparation for control

G. 3.1 Pipe needs to be cleaned from significant burned-on food grease, metal cuttings, loose scale and other surface contamination.

G. 3.2 Before the control is displayed on the flaw detector mode and tested its performance in accordance with manual and methods of control.

G. 3.3 Setting the sensitivity of the detector is produced by using reference samples. Adjust the sensitivity of the reference sample is considered complete if three-, five-passing sample through the detector in a steady state check occurs wholly artificial defects.

G. 3.4 As reference samples checked at least once in three months. At the same time is carried out metrological control of the size of artificial discontinuities (holes) on the sample.

G. 4 control

4.1 Pipe with one set in broaching centering device.

4.2 If the passage of the pipe does not occur, the signal «Marriage," indicating the presence of unacceptable discontinuities in it, the pipe is considered suitable. Otherwise, the pipe is excluded.

4.3 Control settings eddy current flaw detector should be carried out before starting work on 3.3 and periodically after every 2 hours of continuous operation by two-, three-time transmittance of the sample through the installation.

4.4 When you find violations of setup or deviations from the requirements described in G. 2.2-G. 2.5 hereof, the control pipe should be discontinued until recovery mode of operation of the equipment. All pipes are inspected for these violations, are subjected to secondary inspection.

G. 5 Processing of results

5.1 Display the defective area is signal light that is activated as it passes through the in-line Converter. The unit can operate in automatic mode providing the sorting is controlled by pipes to appropriate and do not meet the technical requirements. In addition, it can be connected registered or marking device.

5.2 Results vortex tubes are entered into the log, which must be specified the basic conditions of control (reference sample, the type of installation, the volume control, the operating frequency, the size of passage of the transducer).

5.3 journal Entries are used for statistical analysis of the effectiveness of the control tubes and the state of the technological process of their production.