GOST R 52949-2008

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  ГОСТ Р 52949-2008

GOST R 52949−2008 Fittings-adapters from copper and copper alloys for connecting of pipelines. Specifications

GOST R 52949−2008

Group В64

NATIONAL STANDARD OF THE RUSSIAN FEDERATION

FITTINGS-ADAPTERS FROM COPPER AND COPPER ALLOYS FOR CONNECTING OF PIPELINES

Specifications

Fittings-adapters from copper and copper alloys for connecting the pipelines.
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 dated 14 August 2008 N 172-St

4 this standard is designed to meet the basic regulatory provisions of the regional standard EN 1254−4:1998, «copper and Copper alloys. Fittings. Part 4. Fittings, attachable by a combination of capillary soldering soft or hard solder or compression with other types of connections (EN 1254−4:1998 «Copper and copper alloys — Plumbing fittings — Part 4: Fittings combining other end connections with capillary or compression ends», NEQ)

5 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

1 Scope

This standard applies to fittings-adapters from copper and copper alloys with different tips: soldering or pressing on one side and threaded on the other, intended for the connection of copper pipes manufactured according to GOST R 52318, and establishes requirements for fittings-adapters used in the systems: drinking water, hot and cold water, water (steam) heating, heating and cooling, sewage, water treatment plants and gas supply.

The standard specifies the screw connections of the ends of the fitting types and thread sizes.

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

GOST R 52948−2008 Fittings of copper and copper alloys for jointing copper pipe pressing method. Specifications

GOST 2533−88 Gauges for pipe cylindrical thread. Tolerances

GOST 6211−81 Basic norms of interchangeability. Thread taper pipe

GOST 6357−81 Basic norms of interchangeability. Pipe thread cylindrical

GOST 7157−79 Gauges for taper pipe threads. Types. Basic dimensions and tolerances

GOST 24939−81 Gauges for cylindrical threads. Types

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.

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 other components of the system.

3.2 threaded coupling: the Connection that ensures the separation of the system without violating other sections of the pipe.

The threaded connection may be: a sphere in the cone, cone to cone or cone to the radius or a flat surface with a sealant.

The constituent parts of the threaded connection must be only from one specific manufacturer.

4 Technical requirements

4.1 Materials, technical requirements, methods of inspection and testing, acceptance rules, labeling, packaging, transportation and storage shall conform to the requirements for fittings-adapters:

with end for capillary soldering in accordance with GOST R 52922;

— end for pressing according to GOST R 52948.

4.2 the threaded joint in the Assembly must withstand the maximum operating pressure for the corresponding end of the pipe. When you disconnect and reattach the threaded connection shall withstand the maximum operating pressure.

4.3 During the installation of the pipeline should be applied to the inner and outer cylindrical and conical outer threaded connections.

4.4 Internal cylindrical threaded connection shown in figures 1 and 2.

Figure 1 — cylindrical Internal thread connection thread according to GOST 6357

Figure 1 — cylindrical Internal thread connection thread according to GOST 6357

The size of the internal cylindrical threads shall be as specified in tables 1 and 2.


Table 1 — Dimensions of the internal cylindrical threads according to GOST 6357

In millimeters

Figure 2 — Internal cylindrical threaded connection with thread according to GOST 6357

Table 2 — Dimensions of the internal cylindrical threads according to GOST 6357

In millimeters

4.5 Outer conical threaded connection shown in figures 3 and 4.

Figure 3 — External tapered thread connection thread according to GOST 6211

________________
 — thread end.

Figure 3 — External tapered thread connection thread according to GOST 6211

The dimensions of the outer tapered thread shall be as specified in tables 3 and 4.


Table 3 — dimensions of an external conical thread according to GOST 6211

In millimeters

Figure 4 — the Outer modified conical threaded connection Rk

________________
 — thread end.

Figure 4 — the Outer modified conical threaded connection according to GOST Rk 6211

Table 4 — Dimensions of outer modified conical thread according to GOST Rk 6211

In millimeters

4.6 Outer cylindrical threaded connection shown in figure 5.

Figure 5 — External cylindrical threaded connection according to GOST 6357

Figure 5 — External cylindrical threaded connection according to GOST 6357

The dimensions of the outer cylindrical thread shall be as specified in table 5.


Table 5 — Dimensions of the outer cylindrical thread according to GOST 6357

In millimeters

4.7 maximum deviation in the diameter of the fittings with threaded ends is checked using gauges according to GOST 2533, 7157 GOST and GOST 24939.

4.8 the Torque required to make seal to the nut and on to the straight section of the pipe.

4.9 Minimum wall thickness at the threaded portion of the fitting is specified in table 6.


Table 6 — Minimum wall thickness of fitting

In millimeters

4.10 Minimum cross section for fittings with different ends does not extend to other outlets.

4.11 the Minimum outer diameter of the end face on the fittings with the sealing chamfer must match the size specified in table 5.

4.12 Loose flanges and fasteners on the flange type fittings may be black metal, if not specified.

Note — Requirements for corrosion protection flanges and fasteners made of ferrous metals indicated by the consumer.