Metallurgi

Kommittébeteckning: SIS/TK 142 (Konstruktionsstål)
Källa: CEN
Svarsdatum: den 23 okt 2018
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This part of this European standard specifies tolerances for hot finished circular, square, rectangular and elliptical structural hollow sections, manufactured in wall thicknesses up to 120 mm, in the following size ranges:

— Circular: Outside diameters up to 2 500 mm;

— Square: Outside dimensions up to 800 mm × 800 mm;

— Rectangular: Outside dimensions up to 750 mm × 500 mm;

— Elliptical: Outside dimensions up to 500 mm × 250 mm.

The formulae for calculating sectional properties of sections manufactured to the dimensional tolerances of this standard, to be used for the purposes of structural design, are given in Annex A.

Dimensions and sectional properties for a limited range covering the more common sizes are given in Annex B.

NOTE The designation of the sections' major axis (yy) and its minor axis (zz) align with the axis designation used for structural design in the structural Eurocodes.

Ämnesområden: Rörledningssystem; Korrosion
Kommittébeteckning: SIS/TK 146 (Korrosion)
Källa: CEN
Svarsdatum: den 29 okt 2018
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This document specifies the requirements and recommendations for cathodic protection systems applied to the internal surfaces of metallic tanks, structures, equipment, and piping containing raw or treated seawater or brackish waters, to provide an efficient protection from corrosion.

Cathodic protection inside fresh water systems is excluded from this document. This is covered by EN 12499.

NOTE EN 12499 covers internal cathodic protection for any kind of waters, including general aspects for seawater; but excluding industrial cooling water systems. This document specifically details applications in seawater and brackish waters.

Ämnesområden: Korrosion; Färg och lack
Kommittébeteckning: SIS/TK 433 (Färg och lack)
Källa: CEN
Svarsdatum: den 29 okt 2018
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This document describes methods of scribing coated steel or test-pieces for corrosion tests, where the coating system is applied at dry film thicknesses of less than 500 μm. It is intended as a guideline only, being based on the results of a collaborative trial with no subsequent corrosion testing having been carried out to determine the suitability of the introduced scribe marks for such tests.

This document covers the scribing of metallic panels or test pieces (chemically treated or not) made from:

— steel,

— galvanized steel,

— aluminium alloys,

— magnesium alloys.

It does not cover the scribing of electroplated metal or clad aluminium panels.

Kommittébeteckning: SIS/TK 142 (Konstruktionsstål)
Källa: CEN
Svarsdatum: den 6 nov 2018
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This part of prEN 10219 specifies the technical delivery conditions for electric welded and submerged arc welded cold formed structural steel hollow sections of circular, square, rectangular or elliptical forms and applies to structural hollow sections formed cold without subsequent heat treatment.

The general conditions (product characteristics, test methods and performance criteria that apply under the Construction Products Regulations) are specified in prEN 10219-1 and the requirements for tolerances, dimensions and sectional properties in prEN 10219-3.

NOTE 1 prEN 10219-1 covers provision of the Construction Products Regulations (CPR) to fulfil European law for construction products. The technical delivery conditions are described within prEN 10219-2 in combination with Clauses 2, 3, 4, 5, 7 and 8 of prEN 10219-1.

NOTE 2 The attention of users is drawn to the fact that whilst cold formed grades in prEN 10219-2 can have equivalent mechanical properties to hot-finished grades in prEN 10210-2 the sectional properties of square and rectangular hollow sections in prEN 10219-3 and prEN 10210-3 are not equivalent.

NOTE 3 A range of steel grades is specified in this European Standard and the user should select the grade most appropriate to the intended use and service conditions. The grades and mechanical properties, but not the final supply condition of cold formed hollow sections are comparable with those in EN 10025-2, EN 10025-3, EN 10025-4, EN 10025-5, EN 10025-6, EN 10149-2 and EN 10149-3.

NOTE 4 Hollow sections for offshore structures are covered in EN 10225.

Kommittébeteckning: SIS/TK 129 (Lättmetaller)
Källa: ISO
Svarsdatum: den 12 nov 2018
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This International standard specifies a visual method for assessing the porosity of the machined surface of aluminium alloy casting.

NOTE The method cannot be used for assessing porosity present on radiograms.

Kommittébeteckning: SIS/TK 135 (Rostfria stål)
Källa: CEN
Svarsdatum: den 27 nov 2018
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This document specifies the technical delivery requirements for open die forgings, forged bars and products pre-forged and finished in ring rolling mills, manufactured from stainless steels with ferritic, martensitic, austenitic and austenitic-ferritic structures.

NOTE The majority of steels listed in this part of EN 10250 are identical to steels specified EN 10088-3 and more extensive information on properties is given in that European Standard.

General information on technical delivery conditions is given in EN 10021.

Kommittébeteckning: SIS/TK 121 (Bestämning av mikrostruktur i stål)
Källa: ISO
Svarsdatum: den 1 dec 2018
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This International Standard provides a method for the evaluation of the resistance to hydrogen embrittlement (i.e. hydrogen delayed fracture) using constant loading test with hydrogen pre-charged specimens. The amount of hydrogen content absorbed in the specimens is analysed quantitatively by thermal desorption analysis such as gas chromatography, mass spectrometry and so on. In the case of hydrogen continuous charging such as hydrogen absorption in aqueous solution at free corrosion potential, hydrogen absorption in atmospheric corrosion environments and hydrogen absorption in high pressure hydrogen gas, the evaluation method is also briefly described. This method is mainly applicable to the evaluation of hydrogen embrittlement resistance of high strength steel bolts.

Ämnesområden: Gjutgods av stål och järn
Kommittébeteckning: SIS/TK 130 (Gjutet järn och stål)
Källa: ISO
Svarsdatum: den 9 dec 2018
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This International Standard specifies the acceptance criteria for the surface inspection of steel, nickel alloy and cobalt alloy investment castings by visual examination.

NOTE Criteria for special applications such as aerospace are defined in other International Standards.

Ämnesområden: Stålrör; Vatteninstallationer
Kommittébeteckning: SIS/TK 118 (Rörledningsprodukter och ventiler)
Källa: ISO
Svarsdatum: den 10 dec 2018
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This international standard specifies the evaluation method of life cycle analysis of ductile iron pipes used for water applications.

Studies on economic and environmental impacts are important for utility decision-makers as they seek to balance fiscal concerns over immediate and long-term needs across acquisition, operations and maintenance, and planned end of life. For authorities and engineers designing pipeline systems, the life cycle cost analysis serves as a tool to study various scenarios to determine the right solution for site-specific conditions and community values, as well as provide the necessary data to support those decisions.

Informative Annexes are included in this standard as a compilation of reference and consensual factors (pumping cost, leakage accident rate, etc.) but it is recommended to use local data when they are known and verifiable.

Kommittébeteckning: SIS/TK 130 (Gjutet järn och stål)
Källa: ISO
Svarsdatum: den 11 dec 2018
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This International Standard specifies a method for the liquid penetrant inspection of steel castings, whatever

their grade and the casting procedure used to produce them.

Ämnesområden: Gjutgods av stål och järn
Kommittébeteckning: SIS/TK 130 (Gjutet järn och stål)
Källa: ISO
Svarsdatum: den 17 dec 2018
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This International Standard specifies tool-steel compositions for usable cast shapes in the annealed condition.

NOTE Annex A gives information on ISO grade designation and available UNS numbers which are similar to the ISO grade designation.