Kovové materiály

Oblast zaměření: Kovové koroze
Komise : CEN/TC 219 (Cathodic protection)
Původce: CEN
K připomínkám do: 20.11.2018
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Scope

This document describes the general principles for the implementation and management of a system of cathodic protection against corrosive attacks on structures which are buried or in contact with soils, surface fresh waters or underground waters, with and without the interference of external electrical sources. It specifies the protection criteria to be achieved to demonstrate the cathodic protection effectiveness.

For structures that cannot be electrically isolated from neighbouring influencing structures, it may be impossible to use the criteria defined in the present document. In this case, EN 14505 will be applied (see 9.4 “Electrical continuity/discontinuity”).

To assist in forming a decision whether or not to apply cathodic protection the corrosion likelihood can be evaluated using Annex A. Annex A summarizes the requirements of EN 12501‑1 [2] and EN 12501‑2 [3].

Cathodic protection of structures immersed in seawater is covered by EN 12473 and a series of standards more specific for various applications.

Cathodic protection for reinforced concrete structures is covered by EN ISO 12696.

This document is applicable in conjunction with:

—    EN ISO 15589‑1 for application for buried or immersed cathodically pipelines,

—    EN 50162 to manage d.c. stray currents,

—    EN ISO 18086 to manage corrosion due to a.c. interference from high voltage power sources and a.c. traction systems,

—    EN 13509 for cathodic protection measurement techniques

—    EN 50443 to manage protection for touch and step voltage.

Oblast zaměření: Drahé kovy
Komise : CEN/SS M21 (Precious metals)
Původce: CEN
K připomínkám do: 25.11.2018
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This document specifies a range of fineness of precious metal alloys (excluding solders) recommended for use in the field of jewellery.

National legal requirements for the designation, marking, and stamping of finished articles in the respective countries have to be taken into account.

Oblast zaměření: Kovové koroze
Komise : CEN/TC 262 (Metallic and other inorganic coatings, including for corrosion protection and corrosion testing of metals and alloys)
Původce: CEN
K připomínkám do: 27.11.2018
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This International Standard specifies the minimum requirements and the functional characteristics of enamel coatings applied by any process, such as wet dipping, wet flow-coating, wet spraying, wet electrostatic spraying, wet electrodeposition or dry-powder electrostatic spraying, to profiled steel heat exchanger panels in regenerative heat exchangers, before and after packing in baskets.

For very severe service conditions, or to obtain extended operational life, more stringent limits may be agreed between customer and supplier.

Oblast zaměření: Kovové koroze
Komise : CEN/TC 262 (Metallic and other inorganic coatings, including for corrosion protection and corrosion testing of metals and alloys)
Původce: CEN
K připomínkám do: 30.11.2018
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This document specifies a method for using phase sensitive eddy current instruments for non-destructive measurements of the thickness of non-magnetic metallic coatings on metallic and non-metallic basis materials such as:

zinc, cadmium, copper, tin or chromium on steel;

Copper or silver on composite materials.

The phase sensitive method can be applied without thickness errors to smaller surface areas and to stronger surface curvatures than the amplitude sensitive eddy current method specified in ISO 2360, and is less affected by the magnetic properties of the basis material. However, the phase sensitive method is more affected by the electrical properties of the coating materials.

In this document the term “coating” is used for materials such as, for example, paints and varnishes, electroplated coatings, enamel coatings, plastic coatings, claddings and powder coatings.

This method is particularly applicable to measurements of the thickness of metallic coatings. These coatings can be non-magnetic metallic coatings on non-conductive, conductive or magnetic base materials, but also magnetic coatings on non-conductive or conductive base materials.

When measuring metallic coatings on metallic basis material, the product of conductivity and permeability (σm) of one of the materials should be at least a factor of 2 times the product of conductivity and permeability for the other material. Non-ferromagnetic materials have a relative permeability of 1.

Oblast zaměření: Svařování
Komise : CEN/TC 121 (Welding and allied processes)
Původce: CEN
K připomínkám do: 10.12.2018
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This document is part of a series of standards dealing with specification and qualification of welding procedures. Annex A gives details of this series of standard, annex B gives a flowchart for the use of these standards and Annex C gives a flow diagram for the development and qualification of a WPS.

This document defines general rules for the specification and qualification of welding procedures for metallic materials. This standard also refers to several other standards as regards detailed rules for specific applications.

This document is applicable to manual, partly mechanized, fully mechanized and automatic welding.

Welding procedures are qualified by conforming to one or more welding procedure qualification records (WPQR). The use of a particular method of qualification is often a requirement of an application standard.

Qualification of pWPS by more than one method is not recommended. It is assumed that welding procedure specifications are used in production by competent welders, qualified in accordance with the relevant part of ISO 9606 or by competent operators qualified in accordance with ISO 14732.

Oblast zaměření: Svařování
Komise : CEN/TC 121 (Welding and allied processes)
Původce: CEN
K připomínkám do: 15.12.2018
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This document specifies requirements for the content of welding procedure specifications for gas welding processes.

This document is part of a series of standards, details of this series are given in ISO 15607:2003, annex A.

Variables listed in this document are those influencing the quality of the welded joint.

Oblast zaměření: Svařování
Komise : CEN/TC 121 (Welding and allied processes)
Původce: CEN
K připomínkám do: 18.12.2018
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This document gives guidance on levels of imperfections in electron and laser beam welded joints in steel, nickel, titanium and their alloys. Three levels are given in such a way as to permit application for a wide range of welded fabrications. The levels refer to production quality and not to the fitness-for-purpose of the product manufactured.

This document applies to electron and laser beam welding of:

steel, nickel, titanium and their alloys;

all types of weldswelded withor without additional filler wire;

materials equal to or above 0,5 mm thickness for electron and laser beam welding.

When significant deviations from the joint geometries and dimensions stated in this standard are present in the welded product, it is necessary to evaluate to what extent the provisions of this Standard can apply.

Metallurgical aspects, e.g. grain size, hardness are not covered by this standard.

Oblast zaměření: Ocel
Komise : ECISS/TC 110 (Steel tubes, and iron and steel fittings)
Původce: CEN
K připomínkám do: 18.12.2018
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This document specifies requirements for the manufacture of two product specification levels (PSL 1 and PSL 2) of seamless and welded steel pipes for use in pipeline transportation systems in the petroleum and natural gas industries.

This document is a supplement to API Spec 5L, 46th edition (2018), the requirements of which are applicable with the exceptions specified in this document.

This document is not applicable to cast pipe.

Oblast zaměření: Měď
Komise : CEN/TC 133 (Copper and copper alloys)
Původce: CEN
K připomínkám do: 24.12.2018
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This document specifies the requirements, sampling, test methods and conditions of delivery for seamless round copper and copper alloy tubes used for refrigeration and air-conditioning piping systems (i.e. piping, connections and repairs).

It is applicable to tubes with an outside diameter from 3 mm up to and including 219 mm.

Tubes made of the copper-grade Cu-DHP are supplied in straight lengths in the material conditions hard or half-hard, or in coils in the annealed material condition.

Tubes made of the alloy CuFe2P are supplied in straight length in the material conditions hard or annealed.