GOST R 52948-2008

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  ГОСТ Р 52948-2008

GOST R 52948−2008 Fittings of copper and copper alloys for jointing copper pipe pressing method. Specifications (with Change No. 1)

GOST R 52948−2008

Group В64

NATIONAL STANDARD OF THE RUSSIAN FEDERATION

FITTINGS OF COPPER AND COPPER ALLOYS FOR JOINTING COPPER PIPES WITH PRESSING METHOD

Specifications

Fittings from copper and copper alloys with compression ends for use with copper tubes. Specifications

OKS 23.040.15
GST 18 4450

Date of introduction 2009−07−01

Preface

The objectives and principles of standardization in the Russian Federation established by the Federal law of 27 December 2002 N 184-FZ «On technical regulation», and rules for the application of national standards of the Russian Federation — GOST R 1.0−2004 «Standardization in the Russian Federation. The main provisions"

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 «joint-stock company «Institute tsvetmetobrabotka"

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

3 APPROVED AND put INTO EFFECT by the Federal Agency for technical regulation and Metrology from August 14, 2008 N 171-St

4 INTRODUCED FOR THE FIRST TIME


Information about the changes to this standard is published in the annually issued reference index «National standards», and the text changes and amendments — in monthly indexes published information «National standards». In case of revision (replacement) or cancellation of this standard a notification will be published in a 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

The Change N 1, approved and promulgated by the Order of Rosstandart of 21.01.2011 No. 2-St c 01.05.2011

Change No. 1 made by the manufacturer of the database in the text IUS N 4, 2011

1 Scope

This standard applies to fittings of copper and copper alloys, intended for connection by way of pressing copper pipes manufactured according to GOST R 52318, and establishes requirements for the press-joints used in the piping systems: drinking water, hot and cold water, water (steam) heating, sewage, water treatment plants, gas supply and heating and cooling systems.

The standard establishes permissible operating temperature, maximum operating pressure, range, technical requirements, acceptance rules, methods of control and testing, marking and packaging of fittings.

2 Normative references

This standard uses the regulatory references to the following standards:

GOST R 52318−2005 Pipes of circular cross-section for water and gas. Specifications

GOST R 52901−2007 corrugated Cardboard for packaging products. Specifications

GOST R 52922−2008 Fittings of copper and copper alloys for jointing copper pipes with capillary soldering method. Specifications

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

GOST 269−66 rubber. General requirements for physical and mechanical tests

GOST 270−75 rubber. Pragoprojekt method for the determination of tensile properties

GOST 613−79 tin foundry Bronzes. Brand

GOST 859−2001 Copper. Brand

GOST 1953.1−79 Bronze tin. Methods for determination of copper

GOST 1953.2−79 Bronze tin. Methods for determination of lead

GOST 1953.3−79 Bronze tin. Methods for determination of tin

GOST 1953.4−79 Bronze tin. Methods for determination of phosphorus

GOST 1953.5−79 Bronze tin. Methods for determination of Nickel

GOST 1953.6−79 Bronze tin. Methods for determination of zinc

GOST 1953.7−79 Bronze tin. Methods of iron determination

GOST 1953.8−79 Bronze tin. Methods for determination of aluminium

GOST 1953.9−79 Bronze tin. Methods for determination of silicon

GOST 1953.10−79 Bronze tin. Methods for determination of antimony

GOST 1953.11−79 Bronze tin. Methods for determination of bismuth

GOST 1953.12−79 Bronze tin. Methods of determining sulphur

GOST 1953.13−79 Bronze tin. Method of determination of manganese

GOST 1953.14−79 Bronze tin. Method for determination of magnesium

GOST 1953.15−79 Bronze tin. Methods for determination of arsenic

GOST 1953.16−79 Bronze tin. Method of determining titanium

GOST 2768−84 Acetone. Specifications

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

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

GOST 3560−73 package steel Strip. Specifications

GOST 4461−77 nitric Acid. Specifications

GOST 6507−90 Micrometers. Specifications

GOST ISO 7323−96 Rubber and compounded rubber, unvulcanized. The determination of indicators

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

GOST 9717.1−82* Copper. Method of spectral analysis on a metal standard samples with photoelectric registration of spectrum
________________
* Not valid on the territory of RF is Valid GOST 31382−2009 here and further on. — Note the manufacturer’s database.

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 10198−91 wooden Boxes for goods of mass 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
________________
* Not valid on the territory of RF is Valid GOST 31382−2009, hereinafter. — Note the manufacturer’s database.

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

GOST 13938.12−78* Copper. Methods for determination of bismuth
________________
* Not valid on the territory of RF is Valid GOST 31382−2009, hereinafter. — Note the manufacturer’s database.

GOST 13938.13−93 Copper. Methods for determination of oxygen

GOST 13938.15−88* Copper. Methods for determination of chromium and cadmium
_______________
* Not valid on the territory of RF is Valid GOST 31382−2009, hereinafter. — Note the manufacturer’s database.

GOST 14192−96 Marking of cargo

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

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

GOST 18829−73 Rings rubber sealing round section for hydraulic and pneumatic devices. Specifications

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 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 25086−87 non-ferrous metals and their alloys. General requirements for methods of analysis

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

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 published annually by the information sign «National standards» published as on January 1 of the current year and related information published monthly indexes published in 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.


(Changed edition, Rev. N 1).

3 Terms and definitions

This standard applies the following terms with respective definitions:

3.1 fitting: a Device in the pipeline system, designed to connect pipes together or with another component of the system.

3.2 the press fitting: the Fitting, one end of which provides a press connection.

3.3 press connection: the Connection of the fitting with sealing element at the end of the pipe subjected to radial compression using a press tool.

3.4 nominal diameter: the nominal diameter of the end fitting, expressed as a nominal outer diameter of the joining pipe.

3.5 press tool: a Special mechanical device, which provides the necessary radial compression of the end fitting and the connecting pipe.

3.6 combustible gas: the Combustible gas, which is gaseous at 15 °C and a pressure 0,1013 MPa. For security reasons, flammable gas usually contains smelling supplements and is referred to as heating, natural and liquefied gases.

3.7 maximum operating pressure; mad: Maximum operating pressure at which the pipeline can operate in normal conditions.

4 Assortment

4.1 Minimum cross section in any part of the fitting should not be less than the theoretically calculated cross section to the minimum diameters specified in table 1.


Table 1

In millimeters

Nominal diameter	The minimum diameter
6,0	4,0
8,0	6,0
10,0	7,0
12,0	9,0
14,0	10,0
14,7	11,0
15,0	11,0
17,0	13,0
18,0	14,0
21,0	18,0
22,0	18,0
25,0	21,0
27,4	23,0
28,0	23,0
34,0	29,0
35,0	29,0
40,0	35,0
40,5	36,0
42,0	36,0
53,6	47,0
54,0	47,0
64,0	55,0
66,7	57,0
70,0	60,0
76,1	65,0
80,0	68,0
88,9	76,0
108,0	92,0

4.2 For fittings with different diameters the minimum diameter is taken for each.

4.3 nominal diameter and minimum wall thickness of pipes according to GOST R 52318 to connect fittings compaction method are shown in table 2.


Table 2

Nominal diameter	The minimum thickness of pipe wall
0,6	0,7	0,8	0,9	1,0	1,1	1,2	1,5	2,0
6,0	X
8,0	X
10,0	X
12,0	X
14,0	X
14,7	X
15,0	X
17,0	X
18,0	X
21,0	X
22,0	X
25,0	X
27,4	X
28,0	X
34,0	X
35,0	X
40,0	X
40,5	X
42,0	X
53,6	X
54,0	X
64,0	X
66,7	X
70,0	X
76,1	X
80,0	X
88,9	X
108,0	X

4.4 the ends of the fittings are made with stops to limit entering of the pipe. For specific purposes allowed produce fittings without stops.

The legend of fittings include:

— name, such as, tee, elbow, coupling, etc.;

— nominal diameter — the diameters of the connected pipes. Fittings designed to connect pipes of the same diameter should be in the designation of this diameter. Fittings designed to connect pipes of different diameters are indicated by showing all the outer diameters of the respective pipes;

— brand copper or alloy;

two alphanumeric sign defining a specific manufacturer, that indicate, if necessary, when ordering.

In the absence of alphanumeric characters is — XX;

— the basic code designation of the fitting;

— type of end fitting. For all fittings types 2 and 3 indicate a dose rate of 0.1 or der of 0.5;

fittings that are made without emphasis, — BU;

— the designation of this standard.

Symbols are examples of fittings:

Fitting in a drainage hole under the pipe with a diameter of 22 mm, made of copper brand M1r, basic code designation 5001А to supply:

The outlet 22 M1p XX5001A type 1 GOST R 52948−2008

Allowed in the callout nominal diameter of the fitting to affix after the base code word.

Fitting in a drainage hole under the pipe, made of copper brand M1r basic code 5001А with a diameter of 22 mm:

The withdrawal M1p XX5001A22 GOST R 52948−2008

(Changed edition, Rev. N 1).

5 Technical requirements

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

5.2 the Name and the basic code designation of fittings specified in GOST R 52922, shall be applied to fittings for connection the copper pipe pressing method.

(Changed edition, Rev. N 1).

5.3 Fittings are manufactured from copper brands M1r, M1 °F and M2r according to GOST 859; brand Cu-DHP with the chemical composition specified in table 3; bronze brand Bro5c5s5 at GOST 613; bronze brand CuSn5Zn5Pb5-C with the chemical composition shown in table 4.


Table 3 — Chemical composition of copper grade Cu-DHP

Mark copper	Limit	Mass fraction of element, %		The density of copper, g/cm
Copper + silver, no less	Phosphorus
Cu-DHP	Min.	99,90	0,015	8,9
Max.	-	0,040
Including silver to 0.015% max.

Table 4 — Chemical composition of bronze stamps CuSn5Zn5Pb5-C

Mark	Limit	Mass fraction of element, %
Copper	No- Kel	Foz Fort	Swee- Heff	Tin	Zinc	Aluminium tions	Jelly zo	Sulfur	Sur- mA	Cream tions
CuSn5Zn5Pb5-C	Min.	83,0	-	-	4,0	4,0	4,0	-	-	-	-	-
Max.	87,0	2,0	0,10	6,0	6,0	6,0	0,01	0,3	0,10	0,25	0,01

5.4 All materials used for the manufacture of fittings, and fittings intended for drinking water pipes under this standard must be authorized by national health authorities.

5.5 Copper and copper alloys are the materials non-combustible, fireproof and so there is no need to test reaction to fire.

5.6 Types of end fittings depending on the environment in which they are used, are given in table 5.


Table 5

Type	The medium used
1	Water
2	Combustible gas
3	Water and combustible gas

5.7 Operating temperature and maximum operating pressure for press-connections should not exceed the values given in tables 6 and 7 in accordance with the type of end fitting.


Table 6 — Operating temperature and maximum operating pressure for all fittings types 1 and 3 in contact with water

Operating temperature, °C	Maximum operating pressure, MPa
30	1,6
95	1,0
Notes 1 the Average pressure should be determined by linear interpolation. 2 By agreement between the consumer and the manufacturer allowed for certain structures of the ends of fittings operating temperature and pressure. 3 Fittings shall withstand temperature extremes of up to 110 °C and pressure up to 1.0 MPa.

Table 7 — Operating temperature and maximum operating pressure for all fittings types 2 and 3 in contact with gas

Operating temperature, °C	Maximum operating pressure, MPa
A dose rate of 0.5	A dose rate of 0.1
From — 20 to + 70	0,5	0,1

5.8 the Outer, inner and end surfaces of the fittings shall be free from dirt, pure. The fittings must not have sharp edges, burrs, cracks, holes and delamination.

On the surface of the fittings allowed for some minor dents, corrugations, burrs from the parting plane of the dies, but these do not affect the installation and operation of pipelines.

5.9 Internal surface of the copper fittings should not contain carbon films or carbon level sufficient for the formation of such a film.

The maximum total carbon level should not exceed 1 mg/DM.

5.10 End surface of the fittings must be perpendicular to the axes of the passages. The deviation must not exceed two degrees.

5.11 Fittings must be sealed.

5.12 Press the connection must be resistant to stretching.

5.13 Press the joint should withstand cyclic temperature changes.

5.14 Press the connection must withstand the operating temperature.

5.15 Press the joint should withstand cyclic pressure changes.

5.16 Press the connection must withstand the vacuum.

5.17 Press the connection must withstand vibration.

5.18 Press the connection must be resistant to static bending load.

5.19 Press the connection must be resistant to high temperature.

5.20 Minimum tensile strength of sealing elements for the ends of fittings type 1 & 3 must be at least 20 N.

Sealing elements for the ends of the fittings of types 1 and 3 must meet the requirements of thermogravimetric analysis (TGA).

5.21 in the interaction with ozone seals of all fittings types 2 and 3 cracks are not allowed.

5.22 Sealing elements for the ends of fittings type 1 must withstand the test specified service life of the sealing element.

6 acceptance Rules

6.1 Fittings take parties. The game shall consist of fittings of the same brand, same size, and must be furnished by a single 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 fittings;

— number of fittings in the party;

— the batch number;

— test results (as required);

— the weight of the batch.

The mass of the party must be not more than 300 kg.

6.2 Control external, internal surface and the presence of markings each fitting is subjected to a party.

6.3 For monitoring nominal and minimum diameters of the fittings select five fittings from the party.

6.4 To control the perpendicularity of end surfaces to the axis of passage of three selected fitting from the party.

6.5 To control the chemical composition selected two fitting from the party.

6.6 leak Test resistance and stretching is carried out according to the plan of the manufacturer.

6.7 If unsatisfactory test results of at least one of the indicators it is carried out re-testing at twice the sample taken from the same batch. The results of repeated tests spread to the entire party.

7 Methods of inspection and testing

7.1 Fittings, which are checked in accordance with 5.11 shall be connected with copper pipe in accordance with manufacturer’s instructions.

7.2 Control of the surface quality and marking of the fittings is carried out visually, without the use of magnifying devices.

7.3 Measurement of wall thickness of the fittings is carried out with a micrometer according to GOST 6507.

7.4 Measurement of the other dimensions is carried out with a Vernier caliper according to GOST 166.

7.5 the end-face Perpendicular to the axis of the passage control of a special goniometer, made by regulations.

7.6 Control of the inner surface of the fittings on the presence of carbon films is carried out in accordance with Annex A.

Determination of residual carbon content on the inner surface of copper fittings is carried out in accordance with Annex B.

7.7 leakproofness Test carried out hydrostatic and pneumatic pressure.

When a leakproofness test hydrostatic pressure in accordance with the parameters specified in table 8, the press connection should be free of signs of leaks.


Table 8 — test Parameters hydrostatic pressure

Type of end fitting	The free length of the pipe in the test Assembly, mm, not less than	The pressure during the test, MPa	Duration of test, min	The number of test specimens to size	Test method
1	100	2,4±0,1	60	1	The App
2 and 3	100	2,4±0,1	60	1	Application C, D

When you leak test the pneumatic pressure in accordance with the parameters specified in table 9, the press connection should be free of signs of leaks.


Table 9 — test Parameters pneumatic pressure

Type of end fitting	The free length of the pipe in the test Assembly, mm, not less than	The pressure in the first test, MPa	The pressure in the second test, MPa	The pressure in the third test, MPa	Duration tions tested at each pressure, min.	The number ispitu- developed samples for size	Test method
2 and 3	100	1.1 x nominal operating pressure (at least 0.3)	0,011	0,002	10	1	Appendix D

7.8 At the request of the consumer test tubes or fittings, assembled by welding or brazing of multiple parts, the manufacturer is conducting hydrostatic or pneumatic pressure.

The pneumatic test pressure is carried out at a pressure of not less than 0.5 MPa, the fittings shall be totally immersed in water. The hydrostatic pressure test is carried out at a pressure of 2.4 MPa in accordance with Annex D.

When testing for tightness of the press connection shall be made in accordance with the method of the manufacturer of the fittings.

7.9 When tested for resistance to stretching in accordance with the parameters specified in table 10, a press-the connection must withstand a pulling force without damaging the press-connection that should not be a leak after re-testing the hydrostatic pressure.


Table 10 — test Parameters for pulling

Type of end fitting	The number of test specimens to size	Test method
1 and 3	1	Annex E The App

7.10 When testing cyclic temperature changes in accordance with the parameters specified in table 11, the press connection should be free of signs of leaks.


Table 11 — test Parameters cyclical changes of temperature

Type of end fitting	The size of the fitting, mm	Inlet water temperature, °C		The pressure during the test, MPa	Duration of test, min	Test- extensively tested, cycles	Flow velocity, m/s	Test method
hot	cold
1 and 3	From 6 to 54	93±2	20±5	1,0±0,1	(15±1) hot water; (15±1) — cold water	5000	0,5	App W
1 and 3	From 64 to 108	(30±2) hot water; (30±2) — cold water	2500

7.11 When tested cyclic temperature change of gas supply systems in accordance with the parameters specified in table 12, the fittings shall show the beginning and end of the test, the leakage rate is not more than 10ATM·cm·s.


Table 12 — test Parameters cyclical changes of temperature of gas supply systems

Type of end fitting	The size of the fitting	The pressure during the test, MPa	Temperature cycles	The free length of the pipe in the tests is tional Assembly, mm, not less	The number of samples for each ispitu- with heater diameter	Method of test- Tania
2 and 3	The smallest and the largest diameters for each crimp forms (form given crimp clamp fittings)	MED/Helium	5 cycles, consisting of: 111 cycles from -10 °C to +50 °C (within 1 h 30 min each) and 1 cycle -20 °C to +50 °C (within 1 h 30 min)	200	3	Application proposal And

7.12 agreement between the consumer and the manufacturer is permitted to test the cyclic temperature changes of gas supply systems with an increased number of test cycles in accordance with the parameters specified in table 13. Press the connection must not have signs of leaks.


Table 13 — test Parameters cyclic changes in temperature with an increased number of test cycles

Type of end fitting	The size of the fitting, mm	Inlet water temperature, °C			Pressure tion if test- Tanya, MPa	Duration of test, min	Test- extensively tested, cycles	SKO- speed of flow, m/s	Method of test- Tania
hot		cold
T1	T2
1 and 3	6 to 54	93±2	110±2	20±5	1,0±0,1	(15±1) — hot water (15±1) — cold water	6000	0,5	Application proposal To
1 and 3	From 64 to 108	(30±2) — hot water (30±2) — cold water	3000
Note — Warm the incoming water, T2 is activated once for every 100 cycles at the same pressure and the same duration as T1.

7.13 When test the operating temperature in accordance with the parameters specified in table 14, the press connection should be free of signs of leaks.


Table 14 — test Parameters operating temperature

Type of end fitting	Temperature, °C		The number of test specimens to size	The free length of the pipe in the test Assembly, mm, not less	Test method
high	low
2 and 3	70±2	-20±2	1	100	App G, L

7.14 When testing cyclic pressure change in accordance with the parameters specified in table 15, the press connection should be free of signs of leaks.


Table 15 — Parameters of the test, the cyclic pressure change

Type of end fitting	Pressure range, MPa		The number of cycles	The frequency of cycles per minute	The number of test specimens to size	Test method
lower	top
1 and 3	0,1±0,05	2,5±0,05	10000	30±5	3	App M

7.15 When testing the vacuum in accordance with the parameters specified in table 16, the change in pressure according to test results should be not more than 0.005 MPa.


Table 16 — test Parameters vacuum

Type of end fitting	The pressure during the test, MPa	Duration of test, min	The number of test specimens to size	Test method
1 and 3	-0,08±0,005	60	3	Annex H

7.16 When testing vibration in accordance with the parameters specified in table 17, the press connection should be free of signs of leaks.


Table 17 — test Parameters vibration

Type of end fitting	The pressure during the test, MPa	Deviation, mm	The number of cycles	The frequency of the cycles in Hz	The number of test specimens to size	Test method
1 and 3	1,5±0,05	1	1000000	20	4	App P
2 and 3	Atmospheric	Application P, G

7.17 During the test of static bending load in accordance with the parameters specified in table 18 of the press connection should be free of signs of leaks.


Table 18 — Static bending load

Type of end fitting	The pressure during the test, MPa	Test load	The maximum deviation of the tube soft and semi-solid state, mm	Duration duration of test, min	The number of test specimens to size	Test method
2 and 3	0,3	App R	100	60	1	Apps R, G

7.18 During the test of high temperature in accordance with the parameters specified in table 19, a press leak for each connection should not exceed 30 DM/h (nitrogen).

The manufacturer specifies the pressure for the test.


Table 19 — Parameters high-temperature testing

Type of end fitting	Temperature, °C	Pressure, MPa		The level of leakage at each end, DM/h	Duration of test, min	Test method
A dose rate of 0.5	A dose rate of 0.1
2 and 3	650±10	0,5+0,05	0,1+0,05	30	30	Application

7.19 the Selection and preparation of samples for chemical analysis is carried out according to GOST 24231.

Chemical composition analysis of copper fittings is carried out according to GOST 13938.1−13938.13 GOST, GOST 13938.15, GOST 9717.1-GOST 9717.3.

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

The chemical composition of the bronze is determined according to GOST 1953.1−1953.16 GOST, GOST 25086.

Allowed to the manufacturer of the sampling carried out by the molten metal.

7.20 Test the tensile strength of sealing elements at the ends of the fittings of types 1 and 3 is carried out according to GOST 270.

To determine the identity of sealing elements at the ends of the fittings of types 1 and 3 is carried out thermogravimetric analysis (TGA) according to GOST ISO 7323.

7.21 Test for resistance to ozone sealing elements on the ends of fittings types 2 and 3 is carried out according to GOST 269.

7.22 Test the durability of the sealing elements on the ends of fittings type 1 is carried out according to GOST 18829.

7.23 allowed the manufacturer to use other methods of control and testing, ensuring the necessary accuracy. If there is disagreement in the definition of indicators monitoring and testing carried out by the methods specified in this standard.

7.24 the Tools and clamps specified by the manufacturer to ensure a secure connection should be used by the consumer.

8 Marking, packaging, transportation and storage

8.1 On the surface of each fitting shall be marked indicating nominal diameter, the trademark or name of the manufacturer.

The fittings of types 2 and 3, which tested cyclic change of the temperature of the gas supply system must be marked GT, indicating maximum operating and test pressures.

In the case of fittings types 2 and 3 shall be marked with permanent paint are distinguishable colour mark yellow, which should be visible after installation.

Sealing elements should be painted:

— for fittings of type 1 — in black color;

— for fittings of types 2 and 3 in yellow.

In the case when fittings are used to other environments in addition to water and gas, the sealing elements should be painted in gray color.

The marking method must ensure its safety during transportation and operation at the consumer.

8.2 the Fittings are Packed in polyethylene film and placed in wooden crates or boxes made of corrugated cardboard.

It is allowed to pack the fittings in boxes without packing in plastic wrap.

As containers and packaging materials can be used:

— boxes of GOST 2991, GOST 10198;

— wooden crates for GOST 12082;

— containers 15102 GOST, GOST 22225;

— wire according to GOST 3282;

— wooden pallets according to GOST 9557;

— tape according to GOST 3560;

— corrugated cardboard according to GOST R 52901;

— polyethylene film according to GOST 10354.

Allowed other types of packaging and packaging materials ensuring the safety of the fittings during transportation, according to the normative documents.

(Changed edition, Rev. N 1).

8.3 Labelling of packaging must be performed on labels glued on the outside packaging, and must contain the following information:

is the trademark or name and trademark of manufacturer;

— the symbol of the fittings;

— number of fittings;

— 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 Packaging of fittings, sent to the far North regions and equated areas according to GOST 15846.

8.6 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.

Maximum permissible mass of cargo room — 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 tying wire is connected by twist of five turns, the tape is in the castle.

8.7 In each container or box shall be attached to the packing slip, containing:

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 the nominal diameter of the fittings, grade of copper or alloy code designation of fitting, type end fitting, the designation of this standard;

— the batch number;

stamp of technical control or the technical controller;

— the date of manufacture.

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

8.9 the Fittings should be stored indoors and shall be protected from mechanical damage, moisture and active chemical substances.

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

9 manufacturer’s Warranty

9.1 the Manufacturer guarantees the conformity of the fittings with the requirements of this standard provided that the customer observes the conditions of transportation and storage.

9.2 Warranty period is 1 year from the date of manufacture.

9.3 after the warranty period of storage fittings before use must be checked for their compliance with the requirements of this standard and compliance can be used by the user to the destination.

The application And (required). Test for the presence of the carbon film

Appendix A
(required)

A. 1 Preparation of sample for test

A. 1.1 the internal surface Area of the sample for test must be at least 10 cmor the entire fitting, which area less.

The outer surface of the sample for test should be clean. The ends of the fitting should be closed, acid resistant caps, then fitting is immersed in concentrated nitric acid according to GOST 4461 for etching the outer surface, then the sample is washed with tap water, then distilled water and dried in air.

A. 1.2 If the sample use a fitting, it is cut into two parts along the pre-treated and degreased saw both halves, immersed in acetone according to GOST 2768.

If the sample for test is part of the fitting, it is degreased by immersion in acetone without cutting.

A. 2 testing

A. 2.1 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 poured a 25% () a solution of nitric acid in such quantity that the sample was completely immersed in the solution at ambient temperature.

A. 2.2 When the acid will turn a blue color, the specimen is removed and washed with distilled water, washing off the acid any particles adhering to the sample.

A. 3 test Results

A. 3.1 the study of the layer formed on the surface of the acid, is carried out with a microscope at tenfold magnification.

When you first view, you can determine the presence of a film or particles on the surface of the acid solution. If nothing is found or some rare small particles, the test is designed.

If the surface of the acid solution is clearly visible floating film — it can be a film of carbon or oxide.

To determine the precise chemical composition of the film — carbon or carbon monoxide, the acid from the film must be brought to the boil and boil slowly for about 5 min to dissolve any oxide layers.

If the film disappeared or remained only rare small particles, the test is designed. If the film remained unchanged, then this carbon and therefore the test is not met.