EESTI ENERGIA Tehnoloogiatööstus AS
Quality, Environmental and Safety Management System
Production process
Coating procedure
Coating procedure specification according NORSOK - 501 system 7B
Contents
1.
Purpose of procedure.......................................................................................................................2
2.
Scope and responsibility ..................................................................................................................2
3.
Content of procedure ...................................................................................................................2
3.1.
Applied equipment...................................................................................................................2
3.2.
Applied personal protection equipment ..................................................................................2
3.3.
Environment conditions ...........................................................................................................3
3.4.
Preparation for blasting ...........................................................................................................3
3.5.
Blasting .....................................................................................................................................3
3.6.
Painting works ..........................................................................................................................4
3.7.
Acceptance criteria: according table 3 – inspection and testing .............................................4
3.8.
Qualification of personnel ........................................................................................................6
4.
Safety of work ..............................................................................................................................6
5.
Environment protection ...............................................................................................................6
6.
Documents connected with procedure .......................................................................................6
7.
Connecting data (records) on quality ...........................................................................................7
1.
Appendix: Pre qualification ......................................................................................................8
2.
Appendix Coating system no.7 .................................................................................................9
1. Purpose of procedure
The procedure CP-S7 is a guide upon performance of paint works in accordance with Coating system no.
7B Jotun Coating System.
2. Scope and responsibility
The procedure is applied in subdivision VIIMISTLUS (hereinafter - VIM) of EESTI ENERGIA
Tehnoloogiatööstus AS (hereinafter - company) upon performance of paint works, where
Coating system no. 7B is applied.
The holder of present document is a manager of VIM.
3. Content of procedure
3.1.Applied equipment
•
Blasting: abrasive steel grit GH40; Venture type nozzle with flow section 10 mm; equipment for
blasting, clearing and shot separation: CLEMCO-MUNKEBO.
•
Painting chamber with combined extract-and-input ventilation system, heating possibility of
suction air up to 600C; preconditioning chamber with combined extract-and-input ventilation system,
heating possibility of suction air up to 400C.
•
Painting devices: GRACO 750, WAGNER PS34.
•
Control and measurement devices: dry film control device eXacto F, layer thickness comb-meter
for wet film control, temperature/humidity/dew-point control Thermometer Hygrometer HD8901Delta,
surface temperature control Testo 830-T1, surface profile comparator Clemco.
•
Auxiliary tools.
3.2.Applied personal protection equipment
•
Painting mask complete with chemical filters.
•
Blasting worker helmet complete with forced air supply system.
•
Protective painting suits.
•
Goggles.
•
Protective footwear.
•
Other facilities for individual protection of workers.
Page 2 of 9
3.3.Environment conditions
Whenever possible, blasting and application of anticorrosive coatings should be executed in the adapted
for such works facilities (workshops). Preparation and painting in premises provide optimum conditions
for the achievement of best result.
Conditions (air, surface temperature, humidity, paint temperature) at fulfillment of preparatory
treatment, painting works and drying of paint should not deviate from technical requirements indicated
in the specifications for corresponding paints.
Anyway, if the relative humidity of air exceeds 80 % and if the temperature of steel does not exceed or
exceeds temperature of dew point less than on 30C, no blasting and anticorrosive coating operations
should be carried out.
Test type: Environmental conditions. Inspections should be done 2 times per shift (every 4 hour)
Acceptance criteria: in accordance with specified requirements. Consequence: not blasting and coating.
3.4.Preparation for blasting
Thread, machined surfaces and other areas which should not be painted, shall be adequately protected
from abrasive influence and possible impurity /damage during blasting. Bolts, nuts, caps, sticky tape,
fabric, tarpaulin, rubber can be suitable protection. All edges should be rounded to r>2mm.
Before blasting whole surface shall be free from any alien material such as welding flux, metal spray,
dirt, fat, salts consistent grease. Solid alien contaminants are removed by cutting; fats, salts, consistent
grease are washed off by water, alkalis or solvents.
3.5.Blasting
Blast clearing to be executed in specially equipped chamber. Tools and equipment for clearing should be
in working condition, compressed air – dry and clean.
Condition of the cleared surface is expressed by degree of preparatory treatment and regulated by
standard ISO 8501-1. Degree of the surface preparatory treatment of products should correspond to
requirements of specification Sa3 – blast cleaning to pure metall. During inspection with the naked eye
any dust, fat and dirt, the dried-on rolling scale, rust, old paint or foreign materials might not be
observed; the surface has a uniform color shade with slightly marked spots.
Surface profile shall be medium G quality and of the cleared steel surface (or surface roughness) is
estimated by the relation of the highest ledges to the cavities casually formed on surface. It is necessary
visually to compare a profile of blasted surface with reference sample.
Schedule of clearing works shall be made in such a way to make possible to start painting as soon as
possible while surface has not become soiled again. Cure time between blasting and painting shall be no
more than 4 hours at medium humidity not exceeding 80%
Inspection test of cleanliness.
Page 3 of 9
Acceptance criteria: in accordance with specified requirements. Inspection should be done for ever y
parts.
Consequence: Reblasting
3.6.Painting works
Painting works shall be carried out according to standard NORSOK M-501, Edition 6, 2012.
Before application of each coat layer a strip painting with brash or roller of all the welded seams,
internal and external corners, edges, and areas which cannot be completely covered by airless spraying
method should be executed. This operation is necessary for reception of a design thickness of a covering
on all sites of a design.
Each coat layer shall be applied uniformly over the whole surface. Passes, curtaining, overflows and
drops should be avoided. Each coat layer shall be free from pinholes/ perforations, swellings/bubbles,
passes. Soiling of the painted surfaces between layers is inadmissible. Any arisen soiling should be
immediately removed and damaged layer should be restored.
During application of anticorrosive coatings only accepted by painting system 7 paints and solvents
should be applied.
Paints and solvents shall be stored properly. Packing should be in a good condition. Original packing
shall be firmly closed; labels and stickers shall be plain and good to be read. During warehousing of
paints and solvents it is necessary to consider safety data indicated on factory labels, requirements
regarding storage conditions and periods of storage. In case of paints are stored in a cold premise, it is
necessary to place them before usage for a while in warm that they were adequately warmed.
Before application all the paint components should be mixed up in the necessary proportion and not
exceed allowed terms of storage/use.
A time Interval prior to application of the repeated/next coat layer should be according to the
recommendations indicated in the technical specification of the corresponding paint.
Inspection test for visual examination of coating shall be done after curing and on coated parts for every
coat .
Acceptance criteria: according to specify requirements
Consequence: Repair of defects
3.7.Coating procedure tests and acceptance criteria: according paint
coating specification 10000709666-PDC-000 rev 01 table 6.1 –
inspection and testing
Controller shall be guided by valid operating procedure of application of anticorrosive coatings,
technical specification for paint and corresponding standards during work.
Measurement/inspection instruments used during work should be calibrated and certificated according
to the valid rules. Calibration certificates should be accessible for review.
Page 4 of 9
Prior to measurement of thickness a film shall reach sufficient degree of hardness.
 Calibration of dry film control device to be done on a smooth surface, in accordance with Norsok
M-501 Edition 6 (Table 11.) should be done every time before inspection start.
 In accordance with ISO 19840: maximum quantity of measurements, which might be replaced
(Table1, point 6.1), should be defined; maximum thickness of dry film should be defined (see
reference to ISO 12944-5 in Point 9d). It cannot be more than 200 % - 600 µm from project
thickness.
Minimum thickness - 300 µm in the given system is the minimum thickness. Acceptance criteria
according paint coating specification 10000709666-PDC-000 table 6.1,ISO 19840 and coating
system data sheet.
Inspection shall be done on every coated parts.
Consequence: coating to be rejected. Following the results of fulfillment and inspection of
painting processes a person responsible for those issues a Painting Report in accordance with
enclosed forms.
 Environmental conditions test. Acceptance criteria: in accordance with specified requirements.
Should be done before painting.
Consequence: not blasting and coating.
 Inspection test of cleanliness shall be done on every parts before painting.
Acceptance criteria: in accordance with specified requirements in table 6.1.
Consequence: Reblasting.
 Salt test.
Acceptance criteria: Maximum conductivity corresponding to 20 mgm/m*2 NaCl.
Test should be done on small part - 3 or 4 test , big part - every parts.
Consequence: repeat washing with portable water and retesting until acceptance.
 Roughness test.
Acceptance criteria: from 50 µm to 85 µm,Ry5.
Should be done on every parts.
Consequence: Reblasting.
 Visual examination of coating.
Acceptance criteria: according to specify requirements: no defects
Shall be done on every parts.
Consequence: Repair of defect.
 Holiday detection according ISO 29601/NACE RPO 188.
Acceptance criteria: no holidays during testing.
Shall be done on every parts.
Consequence: repair and retesting.
 Film thickness test: Min 300 µm and Max 600 µm.
Acceptance criteria: ISO 19840 and coating system data sheet.
Shall be done on every parts.
Consequence: Repair , additional coats or recoating as appropriate.
 Adhesion testing. The minimum adhesion value according NORSOK M-501 Table 3 note 4 is
never below 5 MPa .
One test on one batch should be done.
Consequence: coating to be rejected.
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3.8.Qualification of personnel
Workers executing anticorrosive painting should have required professional qualification and pass
corresponding training with certified acknowledgement.
Prior to start painting works responsible for these works person should check and consider all the
possible ambiguities.
The person for carrying out inspections, verification and verification of personal qualification shall be
qualify in accordance NS 476, has FROSIO certificate with inspector level 3
4. Safety of work
As many paints (especially diluted with solvent) contain unhealthy substances, it is necessary to observe
the established norms and safety rules.
Workplaces should be accessible for inspection of safety data sheets of applied paints by personnel.
5. Environment protection
It is necessary to observe the established norms and rules for environment protection during handling
with paints. It is necessary to handle painting materials very accurately, prevent their hit into the earth,
reservoirs.
Waste should be collected and utilized according to the valid legislation and the established rules.
6. Documents connected with procedure
ISO 8501-1 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. The informative appendix
to the part 1: Representative photographic examples of the change of appearance imparted to steel
when blast-cleaned with different abrasives (ISO 8501-1:1988/Suppl: 1994).
ISO 8503 Preparation of steel substrates before application of paints and related products -- Surface
roughness characteristics of blast-cleaned steel substrates
ISO 8504-2 Preparation of steel substrates before application of paints and related products - Surface
preparation methods -- Part 2: Abrasive blasting clearing.
Norsok standard M-501, Edition 6, 2012 Surface preparation and protective coating
Page 6 of 9
7. Connecting data (records) on quality
1.
2.
3.
4.
5.
6.
7.
8.
Technical data sheets;
Safety data sheets;
Coating system no. 7B;
Record of surface treatment;
Daily log
Additionally Salt test report
Adhesion test report
Holiday test report
Page 7 of 9
1. Appendix: Pre qualification
Page 8 of 9
2. Appendix Coating system no.7
Page 9 of 9