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prEN ISO 148-4 Viešoji apklausa

Komentavimo iki data 2027-01-10

Metalinės medžiagos. Charpy smūginio tąsumo bandymas. 4 dalis. Miniatiūrinių Charpy bandinių su V įpjova bandymas (ISO 148-4:2026)

This document specifies the pendulum impact test method on miniature Charpy-type V-notch test pieces of metallic materials. This document does not cover instrumented impact testing of miniature Charpy-type V-notch test pieces, which is specified in ISO 14556:2023, Annex D[1]. This document can be applied, by agreement, to other impact testing machines, such as drop-weight towers or high-speed servo-hydraulic machines. The user should be aware that data obtained from miniature test pieces are not directly comparable to those obtained from full-size standard Charpy V-notch test pieces[2],[3].

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prEN ISO 4969 Viešoji apklausa

Komentavimo iki data 2027-01-10

Plienas. Makroskopiniam tyrimui skirtas ėsdinimo metodas (ISO 4969:2015)

ISO 4969:2015 establishes guidelines for the macroscopic examination of steel by hot etching, room temperature etching and electrolytic etching. The method has very wide application. Selection of the type, concentration and temperature of the reagent, the etching apparatus and the conditions of surface preparation of the test piece make it possible to achieve the required aim. NOTE It might be difficult to see fine voids and cracks and discriminate between them and determine their nature by macroetching.

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prEN ISO 21224 Viešoji apklausa

Komentavimo iki data 2027-01-10

Ištisinio liejimo plokščių segregacijos vidurinėje zonoje įvertinimas (ISO 21224:2025)

This document specifies a procedure for the evaluation of centreline segregation of continuously cast slabs, including sampling, sample preparation and evaluation method. This document is applicable for low carbon steel slabs for pipe production manufactured by continuous casting. These steels have a typical chemical composition as follows (mass percentages): — C ≤ 0,12 % — Mn ≤ 2,0 % — Si ≤ 0,5 % — Ti + Nb + V ≤ 0,2 % The common dimensions of these slabs are in the following ranges: — Slab width: 800 mm to 2 600 mm — Slab thickness: 150 mm to 450 mm The evaluation methods covered by this document are based on macroscopic etching of slab samples followed by visual inspection by means of human eye or camera systems. The procedures for sampling described in 5.1 to 5.3 of this document are applicable to steels slabs in general (e. g. other steel grades or dimensions). However, the etching procedure (see 5.4) in combination with the evaluation methods described in Clause 6 have been developed especially for the application on pipeline steels as given above. Thus, they are not applicable to other steel grades, product types or dimensions without a prior validation. Any extension or modification beyond the scope of this document necessitates a separate agreement between producer and customer.

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prEN 10131 Viešoji apklausa

Komentavimo iki data 2027-01-10

Šaltai valcuoti nedengti ir cinko arba cinko ir nikelio elektrochemine danga dengti plokštieji neanglingojo ir didelės takumo ribos plieno gaminiai, skirti šaltajam formavimui. Matmenų ir formos leidžiamosios nuokrypos

This European Standard applies to cold rolled uncoated and electrolytically zinc or zinc-nickel coated low carbon and high yield strength steel flat products for cold forming with a minimum thickness of 0,35 mm and, unless otherwise agreed at the time of ordering, less than or equal to 3 mm thick, delivered in sheet, wide strip, slit wide strip or cut lengths obtained from slit wide strip or sheet. The concerned standards are EN 10130, EN 10152, EN 10271, EN 10209, EN 10268 and prEN 10338. It does not apply to cold rolled strip (rolled width < 600 mm) or to flat cold rolled products for which there is a specific standard, in particular the following: cold rolled non-grain oriented magnetic steel sheet and strip (EN 10106); semi-processed steel strip for the construction of magnetic circuits (EN 10126 and 10165); tinplate and ECCS (EN 10202); blackplate in coils (EN 10205); cold rolled uncoated non-alloy mild steel narrow strip for cold forming (EN 10139).

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prEN 10143 Viešoji apklausa

Komentavimo iki data 2027-01-10

Plieno lakštai ir juostos su ištisine lydaline danga. Matmenų ir formos leidžiamosios nuokrypos

This European Standard applies to continuously zinc (Z), zinc-iron alloy (ZF), zinc-aluminium alloy (ZA), aluminium-zinc alloy (AZ) and aluminium-silicon alloy (AS) hot-dip coated flat products made of low carbon and high strength steels for cold forming and of structural steels with a minimum thickness of 0,20 mm and a maximum thickness of 6,50 mm, delivered as sheet, wide strip, slit wide strip or cut lengths obtained from slit wide strip or sheet. The concerned standards are EN 10292, EN 10326, EN 10327 and hot-dip coated products according to prEN 10336. It does not apply for hot-rolled sheet and strip without coating (see EN 10051) and uncoated or electrolytically coated cold rolled sheet and strip (see EN 10131).

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EN 10205:2024/prA1 Viešoji apklausa

Komentavimo iki data 2026-12-06

Šaltai valcuoti alavuoti gaminiai. Juodoji skarda

This document specifies requirements for blackplate product in the form of coils intended for direct use and mostly for the production of electrolytically zinc coated plate, or coils electrolytically coated with either tin (tinplate) or chromium/chromium oxide (ECCS or ECCS-RC). Blackplate can be a single or double reduced product and is specified in nominal thicknesses that are multiples of 0,005 mm from typical 0,10 mm up to 0,60 mm. This document applies to coils in nominal minimum widths of 600 mm. In addition to this document, the general technical delivery conditions of EN 10021 apply. NOTE Standard width coils for specific uses, e.g. tab stock, can be slit into narrow strip for supply in coil form.

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prEN 12451 Archyvuotas

Komentavimo iki data 2026-11-08

Varis ir vario lydiniai. Besiūliai apskrito skerspjūvio vamzdžiai šilumokaičiams

This document specifies the composition, property requirements and tolerances on dimensions and form for seamless round drawn copper and copper alloy tubes for heat exchangers, condensers, evaporators and desalination equipment. It is applicable to copper and copper alloy tubes supplied in the size range from 6 mm up to and including 76 mm outside diameter and from 0,5 mm up to and including 3 mm wall thickness. The sampling procedures and the methods of test for verification of conformity to the requirements of this document are also specified.

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prEN 12452 Archyvuotas

Komentavimo iki data 2026-11-08

Varis ir vario lydiniai. Valcuoti briaunotieji besiūliai vamzdžiai šilumokaičiams

This document specifies the composition, property requirements and tolerances on dimensions and form for rolled, finned, seamless copper and copper alloy tubes for heat exchangers. It is applicable to copper and copper alloy tubes supplied in the size range from 6 mm up to and including 35 mm outside diameter; from 1 mm up to and including 3,5 mm wall thickness of the unfinned section; and with fin height up to and including 4,5 mm. The sampling procedures and the methods of testing for verification of conformity to the requirements of this document are also specified.

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