GOST R ISO 14175-2010

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  ГОСТ Р ИСО 14175-2010

GOST R ISO 14175−2010 Materials welding. Gases and gas mixtures for fusion welding and allied processes

GOST R ISO 14175−2010

NATIONAL STANDARD OF THE RUSSIAN FEDERATION

Materials welding

GASES AND GAS MIXTURES FOR FUSION WELDING AND ALLIED PROCESSES

Welding consumables. Gases and gas mixtures for fusion welding and allied processes

OKS 25.160.20*
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* ICS 11−2011 GOST R ISO 14175−2010 is with ACS 25.160.20, 71.100.20. -
Note the manufacturer’s database.

Date of introduction 2012−01−01

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 PREPARED by the Federal state institution «Scientific-educational center «welding and control» at MGTU im. N. Uh. Bauman (FGU NUCS computer. N. Uh. Bauman), the National Agency for control and welding (NAKS), LLC Certification centre «Alloy» based on their own authentic translation into the Russian language of the standard referred to in paragraph 4

2 SUBMITTED by the Technical Committee for standardization TC 364 «welding and allied processes"

3 APPROVED AND put INTO EFFECT by the Federal Agency for technical regulation and Metrology dated 30 November 2010 N 607-St

4 this standard is identical to international standard ISO 14175:2008* «Materials and welding. Gases and gas mixtures for fusion welding and allied processes» (ISO 14175:2008 «Welding consumables — Gases and gas mixtures for fusion welding and allied processes»)

In applying this standard it is recommended to use instead of the referenced international standards corresponding national standards of the Russian Federation and interstate standards, details of which are given in Appendix YES

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 specifies requirements for classification of gases and gas mixtures intended for fusion welding and allied processes, including welding methods:

arc welding with tungsten electrode (141);

arc welding in shielding gas consumable electrode (13);

— plasma welding (15);

— plasma cutting (83);

— laser welding (52);

— laser cutting (84);

arc picsware (972).

Note — In parentheses are the ciphers of the welding methods in accordance with ISO 4063.


This standard specifies the classification and designation of protective gases and gas mixtures intended for fusion welding, including to protect the back side seam and other auxiliary purposes according to their chemical properties and metallurgical behavior. Standard can use consumers of these products in order a correct choice for the application before welding, and also for the purpose of carrying out the possible qualification procedures.

Gas purity and tolerances of the components from the nominal composition in advance (before delivery) are negotiated between the supplier (manufacturer) and consumer.

Gases and gas mixtures can be supplied in liquid or gaseous state, however, for fusion welding and allied processes gases and gas mixtures are always used only in the gaseous state.

This standard does not apply to flammable gases such as acetylene, natural gas, propane, etc., and gases used in the resonator chambers of gas lasers.

Transportation and handling of gases and the transport container must be made in accordance with the national and other standards and regulations.

2 Normative references

The following normative reference is indispensable for the application in this standard:

ISO 80000−1:2009* Quantities and units. Part 1. General (ISO 80000−1:2009, Quantities and units — Part 1: General)
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* Instead of ISO 31−0:1992.


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 main gas (base gas): Gas that accounts for most of the volume of the gas mixture or single component pure gas.

3.2 classification (classification): Identification of a gas or gas mixture, including a room of this standard and the index group (main group and subgroup) identifying the gas or gas mixture.

Note — Group indices is shown in 5.1 (see table 2).

3.3 component (component): a component of the gas mixture affecting the service properties and characteristics of gas mixtures (e.g., mixtures containing 11% COin argon, WITH thethink component and argon is the main gas).

3.4 capacity (container): Container, vessel, tank or other container used for transporting and/or storing a single-component or mixed gases in gaseous or liquid state.

3.5 classification designation (designation): designation of the gas or gas mixture, including a room of this standard and the index group (main group and subgroup) identifying the gas or gas mixture and the indexes indicating all of the gases contained in the mixture and the volume fraction (percent) of components in the mixture (e.g., a gas mixture containing as a main Ar gas, as a componentwith volume fraction of 11%, has the following classification notation: ISO 14175-M20-ArC-11).

Note — Group indices to denote components given in 5.2.

3.6 impurity (impurity): the Substance with chemical composition different from the main gas and/or components.

3.7 mixed gas (mixture) Gas, consisting of a basic gas and one or more components.

3.8 the nominal value (nominal value): the Percentage of components of a gas mixture designated by the manufacturer or supplier and listed in the classification designation.

3.9 group index (symbol): Main index group and sub-group in the gas mixture (for example, M20 — a group of indices to denote a gas mixture containing as a main Ar gas, as a componentwith volume fraction of 11%).

Note — Group indices is shown in table 2 (see also 5.1).

4 the properties of gases

4.1 General provisions

Information on basic physical and chemical properties of gases covered by this standard are listed in table 1.


Table 1 — properties of gases

4.2 rounding Rules for test results

In determining the conformance of the monitored parameters to the requirements of the present standard actual values of these parameters are rounded off in accordance with the methods given in ISO 80000−1:2009 (Annex b, instruction A). If the measured values obtained using equipment that uses units other than those used in this standard, the measured values before rounding must be in the units given in this standard. If the parameter to be controlled is the average value, then do the rounding only after calculation of the average value. If standards for test methods referred to in normative references this standard shall contain instructions for rounding that conflict with this standard, should be guided by the instructions given in the relevant standards for test methods. The number of significant digits in the rounding results should match the values given in the relevant tables of this standard, containing classification data.

5 Classification and designation classification

5.1 Classification

5.1.1 General provisions

Gases and gas mixtures klassificeret by indicating the number of this standard and the group of indices corresponding to a particular gas or gas mixture, in accordance with table 2. Group indices are divided into the main group (except for Z) and a subgroup.


Table 2 — a Group of indexes included in the classification of gases intended for fusion welding and other related processes

Note — Classification is based on the reactivity of the gas or gas mixture.

5.1.2 the core group

For the major groups use the following notation:

— I — inert gases and inert gas mixtures;

— M1, M2 and M3 mixtures containing oxygen and/or carbon dioxide, which oxidizing agents;

With gas and gas mixtures, which are strong oxidants;

— R — the gas mixture that is a reducing agent;

— N — inactive gas (nitrogen) or gas mixtures, which are reducing agents containing nitrogen;

— O — oxygen;

— Z — gas mixture that contains components not listed in table 2, or having the chemical composition outside of the ranges specified in table 2.

5.1.3 Subgroup

The division into subgroups to produce a given percentage of the basic gas and/or components affecting the chemical activity of a gas or gas mixture (see table 2). The values listed in table 2 are nominal.

5.1.4 Examples of classification

Example 1 a Gas mixture containing as a primary gas Ar, as components of the 6% and 4% O.

Classification: ISO 14175 — M25.

Example 2 a Gas mixture containing as a main Ar gas, as a component of 30%.

Classification: ISO 14175 — I3.

Example 3 a Gas mixture containing as a main Ar gas, as a component 5% H.

Classification: ISO 14175 — R1.

Example 4 a Gas mixture containing as a main Ar gas, as a component of 0.05% O.

Classification: ISO 14175 — Z.

5.2 Classification marking

5.2.1 General provisions

Classification marking gases and gas mixtures are classified (see 5.1) and supplemented groups denoting gases, the mixture and volume fraction of components (%) included in the gas mixture.

This standard uses the following notation gases:

— Ar — argon;

With carbon dioxide;

— N — hydrogen;

— N — nitrogen;

— O — oxygen;

— Not helium.

Group denoting gases, is constructed in such a way that after the symbol indicate the main gas components in descending percentage order, and accordingly built a group denoting the volume fraction of components (%) included in the gas mixture. Group indexes are separated by a dash.

5.2.2 Examples the classification

Example 1 a Gas mixture containing as a primary gas Ar, as components of the 6% and 4% O.

Classification: ISO 14175 — M25.

Classification marking: ISO 14175 — M25 — ArCO — 6/4.

Example 2 a Gas mixture containing as a main Ar gas, as a component of 30%.

Classification: ISO 14175 — I3.

Classification marking: ISO 14175 — I3 — Agne — 30.

Example 3 a Gas mixture containing as a main Ar gas, as a component 5% N.

Classification: ISO 14175 — R1.

Classification marking: ISO 14175 — R1 — ArH — 5.

Example 4 a Gas mixture containing as a main gas is Not, as components of 7.5% Ar & 2.5%.

Classification: ISO 14175 — M12.

Classification marking: ISO 14175 — M12 — Nears — 7,5/2,5.

To refer to gas mixtures containing components that are outside of the ranges specified in table 2 in the main group of indices identifying the gas or gas mixture, denoted Z, which is pointing before the groups denoting gases, the mixture and volume fraction of components (%) included in the gas mixture. Group indexes are separated by a dash.

Example 5 a Gas mixture containing as a main Ar gas, as a component of 0.05% O.

Classification: ISO 14175 — Z.

Classification marking: ISO 14175 — Z — ArO — 0,05.

To refer to gas mixtures containing components not specified in table 2 in the main group of indices identifying the gas or gas mixture, also denoted Z, which is pointing before the groups denoting gases, the mixture and volume fraction of components (%) included in the gas mixture. In this case the component that is not listed here, put a «+ «sign, then bring the volume share of component (%) included in the gas mixture. Group indexes are separated by a dash.

Example 6 a Gas mixture containing as a main Ar gas, as a component of 0.05% Xe (xenon).

Classification: ISO 14175 — Z.

Classification marking: ISO 14175 — Z — Ar + Xe — 0,05.

6 of the tolerance of components

Permissible variation in concentration of components in gas mixtures must conform to the standards specified in table 3.


Table 3 — Permissible deviations of components

Example 1 — At a nominal value of carbon dioxide 25% in the gas mixture, the permissible deviation must not exceed ±2,5% (i.e. the content of carbon dioxide should be in the range of from 22.5% to 27.5%).

Example 2 — At a nominal value of oxygen of 2.5% in the gas mixture, the permissible deviation must not exceed ±0,5% (i.e. the oxygen content should be in the range of from 2.0% to 3.0%).

7 Purity and dew point of gases

Purity and dew point of gases and gas mixtures must conform to the standards specified in table 4. The volume fraction of water vapor indicated in ppm (parts per million) or as a dew point at a pressure 0,101 MPa in degrees (°). Purity and dew point of gas mixtures, special purpose not specified in this standard.


Table 4 — Minimum requirements for the purity and contents of water vapor gases and gas mixtures

8 Test

Analyses of gases and gas mixtures to determine their composition and purity, can hold a manufacturer or supplier in accordance with applicable standards, determining methods and techniques of analysis and control. The results of the tests must conform to the standards specified in tables 2 and 3.

Other additional or special requirements for testing established by agreement between the consumer and the manufacturer or supplier.

9 Re-test

When unsatisfactory results for any of the types of tests you must perform repeated tests on twice the number of samples.

When carrying out re-tests sampling may be performed from the original or from new capacity.

Repeated tests may be performed only for those elements where there was a mismatch between the requirements of this standard.

The results of all retests shall meet the specified requirements, failure to comply with this condition, it is considered that the test gas does not meet the requirements established in this standard for a specific classification designation.

If in the process of preparing samples for testing, or when conducting the tests (at any stage) revealed deviation from the established requirements, the tests irrespective of their results will be void. The test is then carried out again in accordance with the established requirements. It does not require re-tests on twice the number of samples.

10 Marking

On capacity (see 3.4) must be assigned a label (label) with a marking containing at least the following information:

a) the name of the manufacturer or supplier;

b) trade mark;

c) the designation in accordance with this standard (see 5.2);

d) sanitary-and-hygienic indicators and warnings about the safe use in accordance with national and industry standards or regulations.

App YES (reference). Information about the compliance of the referenced international standards reference the national standards of the Russian Federation (and acting in this capacity inter-state standards)

App YES
(reference)

Table YES.1