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MMM method

Standards on MMM

FAQ on MMM

Articles on MMM

A.A. Dubov
The metal magnetic memory method

A.A. Dubov, V.T. Vlasov
About the new classification NDT methods based on positions of risks and eguipment life assessment

V.T. Vlasov, A.A. Dubov
Physical criteria of materials' and structural elements' stress-strain state assessment

A.A. Dubov
Principal features of the metal magnetic memory method and inspection tools as compared to known magnetic NDT methods

A.A. Dubov
The totals of application of the metal magnetic memory method to industry in Russia and other countries

A.A. Dubov, V.T. Vlasov
On the problem of stress-strained state characteristics measurement of structural materials on complex engineering objects. Energy concept of materials' stress-strained state (SSS) diagnostics

A.A. Dubov
Problems of ageing equipment residual life assessment

A.A. Dubov
Assessment of eguipment lifetime using the metal magnetic memory method

A.A. Dubov, I.I. Veliulin
Gas and oil pipelines residual life assessment based on modern methods of engineering diagnostics

A.A. Dubov, M.Yu. Evdokimov, A.V. Pavlov
The experience of scanning devices application for quick inspection of operated gas pipelines

A.A. Dubov, S.M. Kolokolnikov
Review of welding problems and allied processes and their solving using metal magnetic memory effect

 

ISO 24497-1:2007(E)

Non-destructive testing – Metal magnetic memory – Part 1: Vocabulary.

Publication date November 01, 2007

Scope

This part of ISO 24497 specifies terms and definitions of concepts in the sphere of non-destructive testing method by the metal magnetic memory method.

Terms specified by this part of ISO 24497 are mandatory for application in all types of documentation and literature in the sphere of non-destructive testing by the method of metal magnetic memory included in the scope of standardization works and/or using the results of these works.

 

ISO 24497-2:2007(E)

Non-destructive testing – Metal magnetic memory – Part 2: General requirements.

Publication date November 01, 2007

Scope

This part of ISO 24497 specifies the general requirements for the application of the method of metal magnetic memory of components, units, equipment and structures for various application purposes.

The purposes of the method are the following:

• Determination of heterogeneity of the equipment and structures stressed-strained state and revealing of stresses concentration zones as the main sources of damage development.

• Determination of locations of metal sampling in stresses concentration zones for assessment of the structural-mechanical state.

• Early diagnostics of fatigue damages and evaluation of equipment and structure life.

• Reduction of testing and material costs with its utilization in combination with conventional methods of non-destructive testing.

• Quality control of welded joints of various types and embodiment (including contact and spot welding).

• Express sorting of new and used machine-building products by their structural heterogeneity.

 

ISO 24497-3:2007(E)

Non-destructive testing – Metal magnetic memory – Part 3: Inspection of welded joints.

Publication date November 01, 2007

Scope

This part of ISO 24497 specifies the general requirements for the application of the metal magnetic memory method (ММM inspection) as a non-destructive testing method for quality control of welded joints of pressurized components.

This part of ISO 24497 may be applied to welded joints in any type of products, pipelines, vessels, equipment and metal constructions, as agreed with the purchaser.

The terms and definitions for the process are contained in ISO 24497-1, and the general requirements of the process are in ISO 24497-2.

 

GOST R 52005-2003

State Standard of Russian Federation. Non-destructive Testing. Method of Metal Magnetic Memory. General Requirements

Introduction date 21 January, 2003

Scope

This standard specifies general requirements to application of the method of metal magnetic memory of components, units, equipment and structures for various application purposes.

The purpose of the method is:

• Determination of heterogeneity of the equipment and structures stressed-strained state and revealing of stresses concentration zones being the main sources of damages development;

• Determination of locations of metal sampling in stresses concentration zones for assessment of the structural-mechanical state;

• Early diagnostics of fatigue damages and evaluation of equipment and structures life;

• Reduction of testing and material costs volume at its utilization in combination with conventional methods of non-destructive testing;

• Quality control of welded joints of various types and embodiment (including contact and spot welding);

• Express sorting of new and used machine-building products by their structural heterogeneity.

 

GOST R 52081-2003

State Standard of Russian Federation. Non-destructive Testing. Method of Metal Magnetic Memory. Terms and Definitions

Introduction date 10 June, 2003

Scope

This standard specifies terms and definitions of concepts in the sphere of non-destructive testing method by metal magnetic memory method.

Terms specified by this standard are mandatory for application in all types of documentation and literature in the sphere of non-destructive testing by the method of metal magnetic memory included in the scope of standardization works and/or using the results of these works.

 

GOST R 52330-2005

State Standard of Russian Federation. Non-destructive Testing. Stressed-Strained State Test of Industrial Objects and Transport. General Requirements

Introduction date 01 September, 2005

Designation and scope

It is known that Stress Concentration Zones (SCZ), occurring due to technological defects during fabrication, working loads or their combinations are main sources of the equipment and structures damages.

In new machine-building products SCZ occur due to structural heterogeneity and fabricating technology.

Presence of SCZ both on new and already used products significantly reduce their lifetime. Therefore control of products’ stress-strained state and SCZ detection using means of non-destructive testing are important national-economic tasks.

SCZ may vary from parts of micron (product microvolume) up to sizes comparable with these of a product itself (macrovolume).

This standard specifies general requirements to application of methods and means of non-destructive testing of stress-strained state on industrial objects and transport at assessment of machine-building products’, equipment’s and structures’ lifetime.

This standard applies to products and equipment made of steel and alloys, cast iron and other structural materials without limitations on size and thickness including welded joints.

 

ST RWS 004-03

Standard of Russian Welding Society. Non-destructive Testing. Welded Joints of Equipment and Constructions. Method of Metal Magnetic Memory

Introduction date 01 June, 2002

Scope

This standard specifies general requirements for application of the metal magnetic memory method (ММM inspection) for quality control of equipment and construction welded joints working under pressure.

This standard covers equipment and constructions within and beyond the jurisdiction of Gosgortechnadzor (State Engineering Supervision) of the Russian Federation in various branches of industry including manufacturing and service.

The standard may be extended for welded joints of any types of products, pipelines, vessels, equipment and metal constructions as agreed with the consumer.