surface preparation of steel - pda europepda-europe.org/documents/7rema_b.dietz.pdf · surface...
TRANSCRIPT
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PDA Europe 2009 Annual Conference – Displaying the Phantastic World of Polyurea – Phantasialand, 16-18 November
Surface Preparationof Steel
Presented by: Dipl.Ing. Bernd Dietz, REMA TIP TOP GmbH
Created by: Dieter Velte, Oberflächenschutz Elbe GmbHDipl.Ing. Bernd Dietz, REMA TIP TOP GmbH
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PDA Europe 2009 Annual Conference – Displaying the Phantastic World of Polyurea – Phantasialand, 16-18 November
�Steel Design� Construction Details� Welding Seams� Metallic components
�Preparation of Substrate�Imperfections�Preparation method
TOPICS
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PDA Europe 2009 Annual Conference – Displaying the Phantastic World of Polyurea – Phantasialand, 16-18 November
Requirements on steel design
An excellent corrosion protection requires suitable steel objects
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PDA Europe 2009 Annual Conference – Displaying the Phantastic World of Polyurea – Phantasialand, 16-18 November
Why do we need Regulations and Standards for the construction and surface preparation of steel?
Do avoid things like that ………………………. And that!!
Requirements on steel design
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PDA Europe 2009 Annual Conference – Displaying the Phantastic World of Polyurea – Phantasialand, 16-18 November
European Standard
EN 14879-1 (part 1)
Requirements on steel design
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PDA Europe 2009 Annual Conference – Displaying the Phantastic World of Polyurea – Phantasialand, 16-18 November
Requirements on the steel design
Requirements on steel design
�Design of metallic components� Dimensions
� Surface� Accessibility� Rigidity
�Design components�Rotating components�Nozzles & Outlets�Edges, Fillets and Corners�Welding attachments�Transition areas
�Joints (welded or bolted)�Flanged connections�Pipe components
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PDA Europe 2009 Annual Conference – Displaying the Phantastic World of Polyurea – Phantasialand, 16-18 November
Acceptable Deflection of steel:
For rigid coatings and ebonite materials:
l/300
Which means on 1 m
length the steel deflection should be less than 3 mm
Requirements on steel design
Deflection
NO REQUIREMENT FOR POLYUREA AND SOFTRUBBER
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PDA Europe 2009 Annual Conference – Displaying the Phantastic World of Polyurea – Phantasialand, 16-18 November
Minimum Radii
Requirements on steel design
Edge
Fillets
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PDA Europe 2009 Annual Conference – Displaying the Phantastic World of Polyurea – Phantasialand, 16-18 November
Pipe Components
Requirements on steel design
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PDA Europe 2009 Annual Conference – Displaying the Phantastic World of Polyurea – Phantasialand, 16-18 November
Requirements on steel design
Pipe Components
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PDA Europe 2009 Annual Conference – Displaying the Phantastic World of Polyurea – Phantasialand, 16-18 November
Welded Joints
Requirements on weld design
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PDA Europe 2009 Annual Conference – Displaying the Phantastic World of Polyurea – Phantasialand, 16-18 November
Inside of Vessel
Inside of Vessel Grind smooth
Continuous
Fillet Weld
Butt Welding should be used whenever Possible
Requirements on steel design
Weld Design
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PDA Europe 2009 Annual Conference – Displaying the Phantastic World of Polyurea – Phantasialand, 16-18 November
Weld Design
Inside of Vessel
Correct Incorrect
All welds should be continuous
Requirements on steel design
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PDA Europe 2009 Annual Conference – Displaying the Phantastic World of Polyurea – Phantasialand, 16-18 November
•All Welds must be re-inspected
after grit blasting according to
DIN EN 14879-1
Requirements on steel design
Weld Design
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PDA Europe 2009 Annual Conference – Displaying the Phantastic World of Polyurea – Phantasialand, 16-18 November
Flanged designs
Requirements on steel design
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PDA Europe 2009 Annual Conference – Displaying the Phantastic World of Polyurea – Phantasialand, 16-18 November
Nozzles & Outlets
Requirements on steel design
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PDA Europe 2009 Annual Conference – Displaying the Phantastic World of Polyurea – Phantasialand, 16-18 November
Nozzles & Outlets
Requirements on steel design
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PDA Europe 2009 Annual Conference – Displaying the Phantastic World of Polyurea – Phantasialand, 16-18 November
Edges and Fillets
Requirements on steel design
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PDA Europe 2009 Annual Conference – Displaying the Phantastic World of Polyurea – Phantasialand, 16-18 November
Fillets
Requirements on steel design
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PDA Europe 2009 Annual Conference – Displaying the Phantastic World of Polyurea – Phantasialand, 16-18 November
Imperfections
Steel surface after grit blasting Grinding positions
Requirements on steel surfaces
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PDA Europe 2009 Annual Conference – Displaying the Phantastic World of Polyurea – Phantasialand, 16-18 November
Expansion of Air
Law of Gay-Lussac:
V = Vo (1 + УУУУ∙∆∙∆∙∆∙∆t)
Vo = Volume @ ambient temperature
V = Volume @ process temperature
УУУУ = Coefficient of thermal expansion of air
УУУУ = 0,0036611/grd = __1___ 1/grd
273,15
Requirements on steel surfaces
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PDA Europe 2009 Annual Conference – Displaying the Phantastic World of Polyurea – Phantasialand, 16-18 November
Example:
Air expansion of 100 mm³ air @ 80°°°°C process temperature
V = Vo (1 + УУУУ∙∆∙∆∙∆∙∆t)
V = 100 (1 + 0,003661∙∙∙∙60)
V =121, 97 mm³
The air in a pinhole is expanding while spraying of around 22%.
Requirements on steel surfaces
Expansion of Air
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PDA Europe 2009 Annual Conference – Displaying the Phantastic World of Polyurea – Phantasialand, 16-18 November
Coatings > 1 mmType of imperfections
Requirements on steel surface
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PDA Europe 2009 Annual Conference – Displaying the Phantastic World of Polyurea – Phantasialand, 16-18 November
�Regelmäßige oder/und un-regelmäßige Vertiefungen oder Spuren mit relativ scharfen Kanten, einzeln, sich kreuzend oder gleichgerichtet als Schar auftretend. Entstehungsursachen sind z. B. sachgemäß angewandte Bearbeitungsverfahren wie Drehen, Schleifen, Hobeln
�GROOVES�1
Imperfections of Surface
Requirements on steel surface
Permitted where Rz
> 160 µm
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PDA Europe 2009 Annual Conference – Displaying the Phantastic World of Polyurea – Phantasialand, 16-18 November
Shallow pits are permitted
Requirements on steel surface
Imperfections of Surface
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PDA Europe 2009 Annual Conference – Displaying the Phantastic World of Polyurea – Phantasialand, 16-18 November
Requirements on steel surface
Imperfections of Surface
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PDA Europe 2009 Annual Conference – Displaying the Phantastic World of Polyurea – Phantasialand, 16-18 November
Not permitted
Imperfections of Surface
Requirements on steel surface
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PDA Europe 2009 Annual Conference – Displaying the Phantastic World of Polyurea – Phantasialand, 16-18 November
Not permitted
Imperfections of Surface
Requirements on steel surface
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PDA Europe 2009 Annual Conference – Displaying the Phantastic World of Polyurea – Phantasialand, 16-18 November
Imperfections of Surface
Requirements on steel surface
Permitted where Rz> 160 µm
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PDA Europe 2009 Annual Conference – Displaying the Phantastic World of Polyurea – Phantasialand, 16-18 November
Permitted for flat
sections, where
d/h ≥≥≥≥ 10
Imperfections of Surface
Requirements on steel surface
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PDA Europe 2009 Annual Conference – Displaying the Phantastic World of Polyurea – Phantasialand, 16-18 November
Not permitted
Imperfections of Surface
Requirements on steel surface
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PDA Europe 2009 Annual Conference – Displaying the Phantastic World of Polyurea – Phantasialand, 16-18 November
Imperfections of Surface
Requirements on steel surface
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PDA Europe 2009 Annual Conference – Displaying the Phantastic World of Polyurea – Phantasialand, 16-18 November
Not permitted
Imperfections of Surface
Requirements on steel surface
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PDA Europe 2009 Annual Conference – Displaying the Phantastic World of Polyurea – Phantasialand, 16-18 November
Not permitted
Imperfections of Surface
Requirements on steel surface
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PDA Europe 2009 Annual Conference – Displaying the Phantastic World of Polyurea – Phantasialand, 16-18 November
Permitted where b/h ≥≥≥≥ 4
Imperfections of weld seams
Requirements on steel surface
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PDA Europe 2009 Annual Conference – Displaying the Phantastic World of Polyurea – Phantasialand, 16-18 November
Permitted if channel is not to deep, if edges are
rounded and b/h > 4
Imperfections of weld seams
Requirements on steel surface
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PDA Europe 2009 Annual Conference – Displaying the Phantastic World of Polyurea – Phantasialand, 16-18 November
Permitted if edges can be
smoothed by blast cleaning
Imperfections of weld seams
Requirements on steel surface
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PDA Europe 2009 Annual Conference – Displaying the Phantastic World of Polyurea – Phantasialand, 16-18 November
Not permitted
Imperfections of weld seams
Requirements on steel surface
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PDA Europe 2009 Annual Conference – Displaying the Phantastic World of Polyurea – Phantasialand, 16-18 November
Not permitted
Imperfections of weld seams
Requirements on steel surface
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PDA Europe 2009 Annual Conference – Displaying the Phantastic World of Polyurea – Phantasialand, 16-18 November
Not permitted
Requirements on steel surface
Imperfections of weld seams
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PDA Europe 2009 Annual Conference – Displaying the Phantastic World of Polyurea – Phantasialand, 16-18 November
Not permitted
Imperfections of weld seams
Requirements on steel surface
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PDA Europe 2009 Annual Conference – Displaying the Phantastic World of Polyurea – Phantasialand, 16-18 November
Permitted where
l/h ≥≥≥≥ 4
Imperfections of weld seams
Requirements on steel surface
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PDA Europe 2009 Annual Conference – Displaying the Phantastic World of Polyurea – Phantasialand, 16-18 November
Weld Seam – Not permitted
Imperfections of weld seams
Requirements on steel surface
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PDA Europe 2009 Annual Conference – Displaying the Phantastic World of Polyurea – Phantasialand, 16-18 November
Requirements on steel surface
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PDA Europe 2009 Annual Conference – Displaying the Phantastic World of Polyurea – Phantasialand, 16-18 November
�Environment Conditions� Dew Point Restriction� Flush Rust
�Surface contamination�Soluble Salts: Chlorides, Sulphates, Nitrates�Acid deposits�Oil and Grease
Additional Requirements
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PDA Europe 2009 Annual Conference – Displaying the Phantastic World of Polyurea – Phantasialand, 16-18 November
Surface Preparation
ABRASIV BLASTING
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PDA Europe 2009 Annual Conference – Displaying the Phantastic World of Polyurea – Phantasialand, 16-18 November
Abrasive Blasting
� Quality of Blasting ( DIN EN ISO 12944-4 )
� Roughness ( DIN EN ISO 8503-2 )
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PDA Europe 2009 Annual Conference – Displaying the Phantastic World of Polyurea – Phantasialand, 16-18 November
Surface Preparation
SA 1 SA 2
Surface comparisonpictures according to
EN ISO 8501-1
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PDA Europe 2009 Annual Conference – Displaying the Phantastic World of Polyurea – Phantasialand, 16-18 November
Surface Preparation
SA 3SA 2 ½
Surface comparisonpictures according to
EN ISO 8501-1
![Page 50: Surface Preparation of Steel - PDA Europepda-europe.org/documents/7Rema_B.Dietz.pdf · Surface Preparation of Steel Presented by: Dipl.Ing. Bernd Dietz, REMA TIP TOP GmbH Created](https://reader030.vdocuments.mx/reader030/viewer/2022040317/5e3178fbcc3f8b23a129cfe6/html5/thumbnails/50.jpg)
PDA Europe 2009 Annual Conference – Displaying the Phantastic World of Polyurea – Phantasialand, 16-18 November
Surface Preparation
Reinheitsgrad SSPC STD. NACE STD. ISO 8501-1 White Metal Blast SSPC-SP 5 NACE No. 1 SA-3 Near White Metal Blast SSPC-SP 10 NACE No. 2 SA-2½ Commercial Blast SSPC-SP 6 NACE No. 3 SA-2 Brush-Off Blast SSPC-SP 7 NACE No. 4 SA-1
Comparison ISO / NACE / SSPC
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PDA Europe 2009 Annual Conference – Displaying the Phantastic World of Polyurea – Phantasialand, 16-18 November
Surface Preparation
•Roughness Value Medium“G“ (Grit) According to ISO 8503-2 Standardminimal profile: 60 µm
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PDA Europe 2009 Annual Conference – Displaying the Phantastic World of Polyurea – Phantasialand, 16-18 November
Time from the Start of Blasting to the Application of Primer or Polyurea System
If the distance from the dew point is 3 K, the waiting time is:
1 hour at a relative air humidity of 90%2 hours at a relative air humidity of 85% 4 hours at a relative air humidity of 80%
10 hours at a relative air humidity of 70%24 hours at a relative air humidity of 60%Unlimited at a relative air humidity of 40%
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PDA Europe 2009 Annual Conference – Displaying the Phantastic World of Polyurea – Phantasialand, 16-18 November
Many Thanks for your attention !
For further questions please contact:
Bernd Dietz
REMA TIP TOP GmbHBusiness Unit IndustrieGruber Straße 6385586 Poing / GermanyPhone: +49 8121 707 255Fax: +49 8121 707 222Mobil: +49 160 5847486