EN ISO 8501-1:2007
(Main)Preparation of steel substrates before application of paints and related products - Visual assessment of surface cleanliness - Part 1: Rust grades and preparation grades of uncoated steel substrates and of steel substrates after overall removal of previous coatings (ISO 8501-1:2007)
Preparation of steel substrates before application of paints and related products - Visual assessment of surface cleanliness - Part 1: Rust grades and preparation grades of uncoated steel substrates and of steel substrates after overall removal of previous coatings (ISO 8501-1:2007)
ISO 8501-1:2007 is a hardback A5-format book in four languages (English, French, German and Swedish), which specifies a series of rust grades and preparation grades of steel surfaces. The various grades are defined by written descriptions together with photographs that are representative examples within the tolerance for each grade as described in words.
It is applicable to hot-rolled steel surfaces prepared for painting by methods such as blast-cleaning, hand and power tool cleaning and flame cleaning, although these methods rarely lead to comparable results. Essentially, these methods are intended for hot-rolled steel, but blast-cleaning methods, in particular, could also be used on cold-rolled steel of sufficient thickness to withstand any deformation caused by the impact of the abrasive or the effects of power tool cleaning.
This part of ISO 8501 is applicable also to steel substrates that show residues of firmly adhering paint and other foreign matter in addition to residual mill scale.
Vorbereitung von Stahloberflächen vor dem Auftragen von Beschichtungsstoffen - Visuelle Beurteilung der Oberflächenreinheit - Teil 1: Rostgrade und Oberflächenvorbereitungsgrade von unbeschichteten Stahloberflächen und Stahloberflächen nach ganzflächigem Entfernen vorhandener Beschichtungen (ISO 8501-1:2007)
Préparation des subjectiles d'acier avant application de peintures et de produits assimilés - Évaluation visuelle de la propreté d'un subjectile - Partie 1: Degrés de rouille et degrés de préparation des subjectiles d'acier non recouverts et des subjectiles d'acier après décapage sur toute la surface des revêtements précédents (ISO 8501-1:2007)
L'ISO 8501-1:2007 est un livre relié au format A5, en quatre langues (anglais, français, allemand et suédois), qui spécifie une série de degrés de rouille et de degrés de préparation des subjectiles d'acier. Les différents degrés font l'objet de descriptions écrites accompagnées de clichés photographiques qui sont des exemples représentatifs dans les limites de tolérance pour chacun des degrés décrits.
Elle est applicable aux subjectiles en acier laminé à chaud, préparés pour être mis en peinture à l'aide de méthodes telles que décapage, nettoyage à la main et à la machine, nettoyage à la flamme, bien que ces méthodes donnent rarement des résultats comparables. Ces méthodes sont à la base prévues pour l'acier laminé à chaud, mais les méthodes de décapage, en particulier, peuvent également être utilisées sur l'acier laminé à froid d'épaisseur suffisante pour supporter les déformations causées par l'impact de l'abrasif ou les effets du nettoyage à la machine.
L'ISO 8501-1:2007 est également applicable aux subjectiles d'acier qui présentent des résidus bien adhérents de peinture et d'autres particules étrangères en plus des résidus de calamine.
Priprava jeklenih podlag pred nanašanjem barv in sorodnih proizvodov - Vizualno ocenjevanje čistosti površine - 1. del: Stopnje korodiranosti in stopnje priprave nezaščitenih jeklenih podlag ter jeklenih podlag po popolni odstranitvi starih premazov (ISO 8501-1:2007)
General Information
- Status
- Published
- Publication Date
- 30-Apr-2007
- Withdrawal Date
- 29-Nov-2007
- 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
- 01-May-2007
- Completion Date
- 01-May-2007
Relations
- Effective Date
- 22-Dec-2008
- Effective Date
- 22-Dec-2008
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
Overview
EN ISO 8501-1:2007 - Preparation of steel substrates before application of paints and related products - Part 1: Visual assessment of surface cleanliness - specifies a series of rust grades and preparation grades for steel surfaces. The publication (ISO 8501-1:2007) provides written descriptions plus representative photographs (within defined tolerances) to allow consistent visual assessment of uncoated steel and steel after overall removal of previous coatings. The document is issued in four languages (English, French, German, Swedish) and was adopted by CEN as EN ISO 8501-1:2007.
Key Topics
- Visual grading system: A structured set of rust and preparation grades defined by descriptive text and photographic examples to ensure repeatable visual inspection.
- Surface conditions covered: Hot‑rolled steel prepared by blast‑cleaning, hand and power tool cleaning, and flame cleaning; also applicable to thicker cold‑rolled steel where appropriate.
- Residual materials: Guidance for substrates that may retain mill scale, firmly adhering paint, or other firmly adhering foreign matter after cleaning.
- Method comparability: Notes that different cleaning methods (blast, hand/power tool, flame) rarely produce strictly comparable results and should be interpreted accordingly.
- Illustrative content: Photographs accompany each grade to reduce subjectivity in acceptance criteria and inspection reporting.
- Scope within the series: This part focuses on overall coating removal; related parts address localized removal, welds/edges, and high‑pressure water jetting.
Applications
EN ISO 8501-1:2007 is used to create clear, enforceable acceptance criteria and to guide surface‑preparation decisions in coating projects:
- Specification and contract documents for industrial coatings, marine, infrastructure and structural steel projects
- Quality assurance and acceptance inspections by paint inspectors and corrosion engineers
- Pre‑painting condition assessment and verification of cleaning processes (blast, power/hand tools, flame)
- Training and competency evaluations for inspectors and applicators using standardized photographic examples
- Risk assessment for subsequent coating selection based on residual mill scale or adhered coatings
Who uses it: coating specifiers, owners/operators, contractors, paint inspectors, corrosion specialists, and maintenance planners.
Related Standards
- ISO 8501 series (Parts 2–4) - localized removal, welds/edges, and high‑pressure water jetting
- Other surface preparation and coating standards referenced in project specifications and QMS documentation
Keywords: EN ISO 8501-1:2007, ISO 8501-1:2007, surface preparation, rust grades, preparation grades, visual assessment, blast‑cleaning, steel substrates, paint inspection, surface cleanliness.
EN ISO 8501-1:2007 - 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). Due to special content (photographs and sample examples), the international part of the standard is supplied in printed form. The estimated delivery time is 7 working days. For more information, please contact us at prodaja@sist.si
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Frequently Asked Questions
EN ISO 8501-1:2007 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 1: Rust grades and preparation grades of uncoated steel substrates and of steel substrates after overall removal of previous coatings (ISO 8501-1:2007)". This standard covers: ISO 8501-1:2007 is a hardback A5-format book in four languages (English, French, German and Swedish), which specifies a series of rust grades and preparation grades of steel surfaces. The various grades are defined by written descriptions together with photographs that are representative examples within the tolerance for each grade as described in words. It is applicable to hot-rolled steel surfaces prepared for painting by methods such as blast-cleaning, hand and power tool cleaning and flame cleaning, although these methods rarely lead to comparable results. Essentially, these methods are intended for hot-rolled steel, but blast-cleaning methods, in particular, could also be used on cold-rolled steel of sufficient thickness to withstand any deformation caused by the impact of the abrasive or the effects of power tool cleaning. This part of ISO 8501 is applicable also to steel substrates that show residues of firmly adhering paint and other foreign matter in addition to residual mill scale.
ISO 8501-1:2007 is a hardback A5-format book in four languages (English, French, German and Swedish), which specifies a series of rust grades and preparation grades of steel surfaces. The various grades are defined by written descriptions together with photographs that are representative examples within the tolerance for each grade as described in words. It is applicable to hot-rolled steel surfaces prepared for painting by methods such as blast-cleaning, hand and power tool cleaning and flame cleaning, although these methods rarely lead to comparable results. Essentially, these methods are intended for hot-rolled steel, but blast-cleaning methods, in particular, could also be used on cold-rolled steel of sufficient thickness to withstand any deformation caused by the impact of the abrasive or the effects of power tool cleaning. This part of ISO 8501 is applicable also to steel substrates that show residues of firmly adhering paint and other foreign matter in addition to residual mill scale.
EN ISO 8501-1:2007 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 8501-1:2007 has the following relationships with other standards: It is inter standard links to EN ISO 8501-1:2001, EN ISO 8501-1:2001/Supplement, EN 1090-2:2008+A1:2011, EN 253:2009+A2:2015, EN 14208:2004, EN 10290:2002, EN 10289:2002, EN 448:2015, EN 15711:2009, EN 13507:2018, EN 448:2019, EN 10339:2007, EN 12496:2013, EN 10310:2003, EN 14901:2014. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
EN ISO 8501-1:2007 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
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SIST EN ISO 8501-1:2002
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Preparation of steel substrates before application of paints and related products - Visual
assessment of surface cleanliness - Part 1: Rust grades and preparation grades of
uncoated steel substrates and of steel substrates after overall removal of previous
coatings (ISO 8501-1:2007)
Vorbereitung von Stahloberflächen vor dem Auftragen von Beschichtungsstoffen -
Visuelle Beurteilung der Oberflächenreinheit - Teil 1: Rostgrade und
Oberflächenvorbereitungsgrade von unbeschichteten Stahloberflächen und
Stahloberflächen nach ganzflächigem Entfernen vorhandener Beschichtungen (ISO 8501
-1:2007)
Préparation des subjectiles d'acier avant application de peintures et de produits
assimilés - Évaluation visuelle de la propreté d'un subjectile - Partie 1: Degrés de rouille
et degrés de préparation des subjectiles d'acier non recouverts et des subjectiles d'acier
apres décapage sur toute la surface des revetements précédents (ISO 8501-1:2007)
Ta slovenski standard je istoveten z: EN ISO 8501-1:2007
ICS:
25.220.10 Priprava površine Surface preparation
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD
EN ISO 8501-1
NORME EUROPÉENNE
May 2007
EUROPÄISCHE NORM
ICS 25.220.10 Supersedes EN ISO 8501-1:2001, EN ISO 8501-
1:2001/Supplement
English Version
Preparation of steel substrates before application of paints and related products
- Visual assessment of surface cleanliness - Part 1: Rust grades and
preparation grades of uncoated steel substrates and of steel substrates after
overall removal of previous coatings (ISO 8501-1:2007)
Préparation des subjectiles d'acier avant application de Vorbereitung von Stahloberflächen vor dem Auftragen
peintures et de produits assimilés - Évaluation visuelle de von Beschichtungsstoffen - Visuelle Beurteilung der
la propreté d'un subjectile - Partie 1: Degrés de rouille et Oberflächenreinheit - Teil 1: Rostgrade und
degrés de préparation des subjectiles d'acier non Oberflächenvorbereitungsgrade von unbeschichteten
recouverts et des subjectiles d'acier après décapage sur Stahloberflächen und Stahloberflächen nach
toute la surface des revêtements précédents (ISO 8501- ganzflächigem Entfernen vorhandener Beschichtungen
1:2007) (ISO 8501-1:2007)
This European Standard was approved by CEN on 16 November 2006.
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 be obtained on application to the Central Secretariat
or to any CEN member.
This European Standard exis
...
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