EN ISO 8501-4:2020
(Main)Preparation of steel substrates before application of paints and related products - Visual assessment of surface cleanliness - Part 4: Initial surface conditions, preparation grades and flash rust grades in connection with water jetting (ISO 8501-4:2020)
Preparation of steel substrates before application of paints and related products - Visual assessment of surface cleanliness - Part 4: Initial surface conditions, preparation grades and flash rust grades in connection with water jetting (ISO 8501-4:2020)
This document specifies a series of preparation grades for steel surfaces after removal/partial removal of water-soluble contaminants, rust, previous paint coatings and other foreign matter by high-pressure water jetting. The various grades are defined by written descriptions together with photographs that are representative examples within the tolerances for each grade as described in words.
This document specifies both initial surface conditions and after-cleaning flash rust grades, also defined by written descriptions together with representative photographic examples.
This document applies the cleanliness of the surface to its visual appearance.
Consideration in addition to visual appearance is given to invisible contaminants and roughness or profile. Physical and chemical methods for testing for soluble salts and other invisible contaminants on the visually clean surface are found in the ISO 8502 series. The roughness or profile characteristics of the surface are found in the ISO 8503 series.
Vorbereitung von Stahloberflächen vor dem Auftragen von Beschichtungsstoffen - Visuelle Beurteilung der Oberflächenreinheit - Teil 4: Ausgangszustände, Vorbereitungsgrade und Flugrostgrade in Verbindung mit Wasserwaschen (ISO 8501-4:2020)
Dieses Dokument legt eine Reihe von Vorbereitungsgraden von Stahloberflächen nach Entfernen/teilweisem Entfernen von wasserlöslichen Verunreinigungen, Rost und alten Beschichtungen sowie artfremden Verunreinigungen durch Hochdruck-Wasserwaschen fest. Die einzelnen Grade sind durch Beschreibungen und photographische Vergleichsmuster definiert, wobei jedes Vergleichsmuster ein repräsentatives Beispiel für den Bereich darstellt, der von der Beschreibung erfasst wird.
Dieses Dokument legt sowohl Ausgangszustände als auch Flugrostgrade nach dem Reinigen fest, die gleichfalls durch Beschreibungen und repräsentative photographische Beispiele definiert sind.
Nach diesem Dokument wird die Reinheit einer Oberfläche nach ihrem Aussehen beurteilt.
Zusätzlich zum äußeren Erscheinungsbild werden nicht sichtbare Verunreinigungen und die Rauheit oder Profilierung berücksichtigt. Physikalische und chemische Prüfverfahren für lösliche Salze und andere nicht sichtbare Verunreinigungen auf der sichtbar sauberen Oberfläche sind in der Normenreihe ISO 8502 enthalten. Die Rauheits oder Profilkennwerte der Oberfläche sind in der Normenreihe ISO 8503 enthalten.
ACHTUNG - Die in diesem Dokument dargestellten Referenzphotographien können weder auf dem Bildschirm noch im Ausdruck wirklichkeitsgetreu wiedergegeben werden. Es ist wichtig, dass bei der Durchführung von Begutachtungen nur die photographischen Vergleichsmuster in offiziell gedruckten Versionen dieses Dokuments verwendet werden, die von der ISO oder von ISO Mitgliedsorganisationen oder deren Vertreibern erworben wurden.
Préparation des subjectiles d'acier avant application de peintures et de produits assimilés - Évaluation visuelle de la propreté d'un subjectile - Partie 4: États de surface initiaux, degrés de préparation et degrés de fleurette de rouille après décapage à l'eau sous haute pression (ISO 8501-4:2020)
Le présent document spécifie une série de degrés de préparation des subjectiles d'acier après décapage total ou partiel à l'eau sous haute pression des agents contaminants solubles dans l'eau, de la rouille, des couches de peinture antérieures et d'autres matières étrangères. Les différents degrés font l'objet d'une description écrite accompagnée de clichés photographiques qui constituent des exemples représentatifs dans les limites des tolérances pour chacun des degrés décrits.
De plus, ce document spécifie à la fois les états de surface initiaux et les degrés de fleurette de rouille après décapage, également définis par des descriptions écrites accompagnées de clichés photographiques représentatifs.
Le présent document fait le lien entre la propreté du subjectile et son aspect visuel.
Outre l'aspect visuel, il traite également des contaminants invisibles et de la rugosité de surface. Les méthodes physico-chimiques d'analyse des sels solubles et des autres contaminants invisibles sur un subjectile visiblement propre sont issues de la série ISO 8502. Les caractéristiques de rugosité de surface du subjectile sont elles issues de la série ISO 8503.
Priprava jeklenih podlag pred nanašanjem barv in sorodnih premazov - Vizualno ocenjevanje čistosti površine - 4. del: Začetno stanje površine, stopnje priprave in stopnje površinske korozije v povezavi z visokotlačnim vodnim brizganjem (ISO 8501-4:2020)
General Information
- Status
- Published
- Publication Date
- 27-Oct-2020
- Withdrawal Date
- 29-Apr-2021
- Technical Committee
- CEN/TC 139 - Paints and varnishes
- Drafting Committee
- CEN/TC 139 - Paints and varnishes
- Current Stage
- 6060 - Definitive text made available (DAV) - Publishing
- Start Date
- 28-Oct-2020
- Completion Date
- 28-Oct-2020
Relations
- Effective Date
- 08-Jun-2022
Overview
EN ISO 8501-4:2020 (ISO 8501-4:2020) defines how to visually assess the cleanliness of steel substrates prepared by high‑pressure water jetting before applying paints and related coatings. The standard specifies a series of preparation grades for surfaces after removal or partial removal of water‑soluble contaminants, rust, previous coatings and other foreign matter. Grades and flash rust conditions are described in words and illustrated with representative photographs to support consistent visual assessment.
Key technical topics and requirements
- Scope of cleaning method: Applies specifically to surfaces cleaned by water jetting (high‑pressure water washing) rather than abrasive or blast cleaning.
- Preparation grades: Written descriptions plus photographic examples showing acceptable visual conditions after cleaning; used to classify the level of residual contamination and substrate condition.
- Initial surface conditions and flash rust grades: Defines both the pre‑clean state and the degree of surface corrosion (flash rust) that can develop after water jetting, again using descriptive criteria and photos.
- Visual assessment emphasis: Cleanliness is applied to the surface’s visual appearance; inspection relies primarily on sight comparison with the standard’s photographic examples.
- Consideration of invisible factors: The standard recognizes the importance of invisible contaminants (e.g., soluble salts) and surface roughness/profile and references appropriate test methods for these:
- Soluble salts and other invisible contaminants: see the ISO 8502 series (physical and chemical tests).
- Surface roughness/profile characteristics: see the ISO 8503 series.
Practical applications and who uses this standard
EN ISO 8501-4:2020 is used to establish clear, contract‑ready acceptance criteria for water‑jet cleaned steel. Typical users include:
- Coating specifiers and engineers writing surface preparation requirements.
- Inspection and quality‑assurance personnel performing pre‑coating surveys.
- Coating applicators and contractors choosing cleaning methods and documenting compliance.
- Asset owners and facility managers managing maintenance and corrosion protection programs.
- Training providers and auditors who need photographic benchmarks for visual assessment.
Common applications:
- Offshore, marine and industrial asset maintenance where water jetting is preferred.
- Pre‑painting inspection and acceptance for structural steel, storage tanks, bridges and piping.
- Contract documentation where visual acceptance grades and allowable flash rust must be defined.
Related standards
- ISO 8502 series - testing for soluble salts and invisible contaminants.
- ISO 8503 series - methods for surface roughness and profile measurement.
- Other parts of the ISO 8501 series covering visual assessment methods for different cleaning processes.
Keywords: ISO 8501-4, surface preparation, water jetting, visual assessment, preparation grades, flash rust, steel substrates, surface cleanliness.
EN ISO 8501-4:2020 - Zaradi posebne vsebine (fotografije in vzorčni primeri), se mednarodni del standarda dobavi v tiskani obliki. Predvideni rok dobave je 7 delovnih dni. Za več informacij nam pišite (prodaja@sist.si) ali pokličite (014783061). / Standard is only available in paper form. Estimated delivery time is 7 working days. For more information, write to prodaja@sist.si.
Frequently Asked Questions
EN ISO 8501-4:2020 is a standard published by the European Committee for Standardization (CEN). Its full title is "Preparation of steel substrates before application of paints and related products - Visual assessment of surface cleanliness - Part 4: Initial surface conditions, preparation grades and flash rust grades in connection with water jetting (ISO 8501-4:2020)". This standard covers: This document specifies a series of preparation grades for steel surfaces after removal/partial removal of water-soluble contaminants, rust, previous paint coatings and other foreign matter by high-pressure water jetting. The various grades are defined by written descriptions together with photographs that are representative examples within the tolerances for each grade as described in words. This document specifies both initial surface conditions and after-cleaning flash rust grades, also defined by written descriptions together with representative photographic examples. This document applies the cleanliness of the surface to its visual appearance. Consideration in addition to visual appearance is given to invisible contaminants and roughness or profile. Physical and chemical methods for testing for soluble salts and other invisible contaminants on the visually clean surface are found in the ISO 8502 series. The roughness or profile characteristics of the surface are found in the ISO 8503 series.
This document specifies a series of preparation grades for steel surfaces after removal/partial removal of water-soluble contaminants, rust, previous paint coatings and other foreign matter by high-pressure water jetting. The various grades are defined by written descriptions together with photographs that are representative examples within the tolerances for each grade as described in words. This document specifies both initial surface conditions and after-cleaning flash rust grades, also defined by written descriptions together with representative photographic examples. This document applies the cleanliness of the surface to its visual appearance. Consideration in addition to visual appearance is given to invisible contaminants and roughness or profile. Physical and chemical methods for testing for soluble salts and other invisible contaminants on the visually clean surface are found in the ISO 8502 series. The roughness or profile characteristics of the surface are found in the ISO 8503 series.
EN ISO 8501-4:2020 is classified under the following ICS (International Classification for Standards) categories: 25.220.10 - Surface preparation. The ICS classification helps identify the subject area and facilitates finding related standards.
EN ISO 8501-4:2020 has the following relationships with other standards: It is inter standard links to EN ISO 8501-4:2006. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
You can purchase EN ISO 8501-4:2020 directly from iTeh Standards. The document is available in PDF format and is delivered instantly after payment. Add the standard to your cart and complete the secure checkout process. iTeh Standards is an authorized distributor of CEN standards.
Standards Content (Sample)
SLOVENSKI STANDARD
01-december-2020
Nadomešča:
SIST EN ISO 8501-4:2007
Priprava jeklenih podlag pred nanašanjem barv in sorodnih premazov - Vizualno
ocenjevanje čistosti površine - 4. del: Začetno stanje površine, stopnje priprave in
stopnje površinske korozije v povezavi z visokotlačnim vodnim brizganjem (ISO
8501-4:2020)
Preparation of steel substrates before application of paints and related products - Visual
assessment of surface cleanliness - Part 4: Initial surface conditions, preparation grades
and flash rust grades in connection with water jetting (ISO 8501-4:2020)
Vorbereitung von Stahloberflächen vor dem Auftragen von Beschichtungsstoffen -
Visuelle Beurteilung der Oberflächenreinheit - Teil 4: Ausgangszustände,
Vorbereitungsgrade und Flugrostgrade in Verbindung mit Hochdruck-Wasserwaschen
(ISO 8501-4:2020)
Préparation des subjectiles d'acier avant application de peintures et de produits
assimilés - Évaluation visuelle de la propreté d'un subjectile - Partie 4: États de surface
initiaux, degrés de préparation et degrés de fleurette de rouille après décapage à l'eau
sous haute pression (ISO 8501-4:2020)
Ta slovenski standard je istoveten z: EN ISO 8501-4:2020
ICS:
25.220.10 Priprava površine Surface preparation
87.020 Postopki za nanašanje Paint coating processes
barvnih premazov
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EN ISO 8501-4
EUROPEAN STANDARD
NORME EUROPÉENNE
October 2020
EUROPÄISCHE NORM
ICS 25.220.10 Supersedes EN ISO 8501-4:2006
English Version
Preparation of steel substrates before application of paints
and related products - Visual assessment of surface
cleanliness - Part 4: Initial surface conditions, preparation
grades and flash rust grades in connection with water
jetting (ISO 8501-4:2020)
Préparation des subjectiles d'acier avant application de Vorbereitung von Stahloberflächen vor dem Auftragen
peintures et de produits assimilés - Évaluation visuelle von Beschichtungsstoffen - Visuelle Beurteilung der
de la propreté d'un subjectile - Partie 4: États de Oberflächenreinheit - Teil 4: Ausgangszustände,
surface initiaux, degrés de préparation et degrés de Vorbereitungsgrade und Flugrostgrade in Verbindung
fleurette de rouille après décapage à l'eau sous haute mit Hochdruck-Wasserwaschen (ISO 8501-4:2020)
pression (ISO 8501-4:2020)
This European Standard was approved by CEN on 25 July 2020.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may
...
SIST EN ISO 8501-4:2020 표준은 수압 청소 후 철강 표면의 준비 등급을 정의하는 중요한 문서입니다. 이 표준은 고압 물 분사 방식으로 수용성 오염물질, 녹, 이전 페인트 도막 및 기타 이물질의 제거 또는 부분 제거 후의 철강 표면에 대한 여러 가지 준비 등급을 규정하고 있습니다. 각 등급은 문서화된 설명과 함께 각 등급의 공차 내에서 대표적인 예시를 제공하는 사진을 통해 정의됩니다. 이 표준의 강점은 청결의 단계뿐만 아니라 초기 표면 상태와 청소 후 플래시 러스트 등급을 함께 명확하게 설명한다는 점입니다. 즉, 철강 표면의 시각적인 상태뿐만 아니라 보이지 않는 오염물질과 거칠기 또는 프로파일을 고려하여, 물리적 및 화학적 방법을 통해 검증할 수 있는 방법을 제시하고 있습니다. 이는 ISO 8502 시리즈와 ISO 8503 시리즈의 참조로 보완됩니다. EN ISO 8501-4:2020 표준은 보이는 청결과 함께 불투명한 오염물질에 대한 정확한 평가를 가능하게 하여, 표면 준비 과정에서 필요한 모든 기준을 제공하는 데 중점을 두고 있습니다. 이와 같은 체계적인 접근은 특히 도장 및 코팅 작업의 품질과 일관성을 보장하는 데 필수적입니다. 따라서 이 표준은 산업 분야에서 철강 표면 준비와 관련한 명확하고 신뢰할 수 있는 기준으로서 높은 관련성을 지니고 있습니다.
EN ISO 8501-4:2020は、鋼基材の塗装および関連製品の適用前の準備に関する重要な標準であり、特に水圧ジャッティングによる初期表面条件、準備グレード、フラッシュサビグレードを視覚的に評価するための基準を提供します。この文書は、鋼表面の水溶性汚染物質、さび、以前の塗装コーティングやその他の異物を高圧水噴射によって除去または部分的に除去した後の一連の準備グレードを指定しています。 この標準の大きな強みは、各グレードの説明に加え、実際の写真を用いた視覚的評価が行えることであり、利用者が各グレードの基準を直感的に理解しやすくしています。具体的な文書には、初期表面条件や清掃後のフラッシュサビグレードが詳細に記述されており、審査基準を明確に定義しています。この詳細な説明と写真の組み合わせは、表面の清浄度が目視で評価できる重要性を強調しています。 さらに、EN ISO 8501-4:2020は、目に見えない汚染物質や表面の凹凸といった視覚的特徴に加え、物理的および化学的手法によるソルブル塩やその他の目に見えない汚染物質の試験方法がISO 8502シリーズに基づいているため、包括的な評価が可能です。また、表面の粗さやプロファイル特性に関してはISO 8503シリーズが参照されており、これにより製品の耐久性や仕上がりを確保するための全体的な判断ができます。 このように、EN ISO 8501-4:2020標準は、鋼の表面に関する準備プロセスにおいて非常に重要な役割を果たしており、視覚的な清浄度評価の重要性を認識し、業界のニーズに応える内容となっています。
The EN ISO 8501-4:2020 standard provides a comprehensive framework for assessing the surface cleanliness of steel substrates prior to painting and application of related products. This standard is particularly significant for professionals in the coatings industry, as it categorizes preparation grades following the use of high-pressure water jetting to remove contaminants. One of the primary strengths of this standard is its detailed specification of surface preparation grades. It not only offers precise written descriptions but also includes photographs that serve as visual references. This dual approach enhances understanding and application, allowing users to effectively identify and classify surface conditions. The inclusion of both initial surface conditions and flash rust grades post-cleaning is especially relevant, given the critical role that surface cleanliness plays in the longevity and performance of coatings. The EN ISO 8501-4:2020 also addresses the cleanliness of steel surfaces from a comprehensive perspective that goes beyond mere visual inspection. The standard recognizes that invisible contaminants can affect adhesion and performance, thus referencing the ISO 8502 series for testing methods related to soluble salts and other unseen contaminants. Furthermore, it acknowledges the significance of surface roughness and profile, guiding users to consult the ISO 8503 series for additional specifications. The relevance of this standard spans across various sectors within the construction and manufacturing industries, where the integrity of steel surfaces directly impacts the success of paint and coating applications. By providing a clear and structured methodology for evaluating surface cleanliness, the EN ISO 8501-4:2020 standard not only enhances the quality of finishing processes but also promotes safety and durability in engineered structures. In summary, the EN ISO 8501-4:2020 standard is an essential resource that effectively combines visual assessment techniques with comprehensive definitions and guidelines, making it a pivotal tool for ensuring optimal surface preparation in relation to water jetting processes. Its robust framework for both visible and invisible contaminants, coupled with a focus on preparation grades, validates its critical role in the coatings industry.
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