Protection and Painting Specification for Steel Structures Document Number – MOS-M+C-045 This document has been electronically reviewed and approved within Agility software, by all parties named below. Rev. Date 04 19-Oct-2023 Description Written by Checked by Approved by Approved by For implementation L. Morrice H. Petrov G. Fulton S. Bruce Confidential TechnipFMC – Do not disclose without authorization (uncontrolled if printed) TUK Template no. QMT-F-085 Rev. 06 Protection and Painting Specification for Steel Structures Document revision history Rev. no. Date Section (s) Brief description of change Author of change 04 19-Oct-2023 All General update L.Morrice\H.Petrov 03 25-Jul-2018 All For implementation A. George 02 05-Jun-2015 All Updated J. Ellington 01 23-Apr-2013 All Updated as per 5611-DRS-2012-0056 J. Ellington A 21-Jun-2012 All For review J. Ellington B 03-Jun-2015 All For review J. Ellington Rev. 04 Doc. no. MOS-M+C-045 Confidential TechnipFMC – Do not disclose without authorization (uncontrolled if printed) TUK Template no. QMT-F-085 Rev. 06 Page 2 of 16 Protection and Painting Specification for Steel Structures Table of contents 1 2 3 4 5 6 7 8 9 Introduction ......................................................................................................... 4 Scope ................................................................................................................... 4 Definitions ........................................................................................................... 4 Applicable codes and standards ....................................................................... 4 General rules ....................................................................................................... 5 Certification and safety ...................................................................................... 6 Equipment masking ............................................................................................ 6 Rust Converters .................................................................................................. 7 Surface preparation ............................................................................................ 7 9.1 Hand tool cleaning .................................................................................................................. 7 9.2 Power tool cleaning ................................................................................................................ 7 9.3 Blasting ................................................................................................................................... 8 9.3.1 Pre-blasting preparation ......................................................................................................... 8 9.3.2 Blast cleaning ......................................................................................................................... 8 9.3.3 Final blasted surface condition ............................................................................................... 8 10 Coating system International Paint ................................................................... 8 10.1 10.2 10.3 10.4 11 Coating system Jotun....................................................................................... 11 11.1 11.2 11.3 11.4 12 13 DT 129 .................................................................................................................................... 9 DT 130 .................................................................................................................................... 9 DT 131 .................................................................................................................................... 9 DT 132 .................................................................................................................................. 10 DT 129 .................................................................................................................................. 11 DT 130 .................................................................................................................................. 12 DT 131 .................................................................................................................................. 12 DT 132 .................................................................................................................................. 13 Repair procedure .............................................................................................. 14 Stripe coating .................................................................................................... 14 13.1 Application ............................................................................................................................ 14 13.2 Coating sequence................................................................................................................. 15 14 Appendix............................................................................................................ 15 14.1 Examples of grades of rusted steel ...................................................................................... 15 14.2 Examples of prepared standards ......................................................................................... 16 Rev. 04 Doc. no. MOS-M+C-045 Confidential TechnipFMC – Do not disclose without authorization (uncontrolled if printed) TUK Template no. QMT-F-085 Rev. 06 Page 3 of 16 Protection and Painting Specification for Steel Structures 1 Introduction The objective of this specification is to describe the applicable rules and the systems of blasting and painting to protect from corrosion of TechnipFMC OneFleet equipment and assets. 2 Scope This specification defines the requirements governing the protection and painting. It determines the surface preparation, application conditions including mixing, coating system, paint selection and inspection requirements. This specification is applicable to internal and external surface of steel equipment and structures. Four levels of protection are developed in this specification (DT 129, 130, 131, & 132). The level of protection required depends on the type of equipment and design life. The level of protection required is defined in the fabrication specification or supplied by the OEM. If this is not the case the level of protection must be investigated. The four levels of protection categorised by TechnipFMC are: • DT 129 Applicable to any welded mechanical structure subjected to marine conditions when the design life is limited. • DT 130 Applicable to any welded mechanical structure subjected to marine conditions. • DT 131 Dedicated to any welded mechanical structure subjected to severe marine conditions, such as spray, occasional inundation by green water and located on the weather decks of the vessel. • DT 132 Applicable to any welded mechanical structure subjected to extreme severe marine conditions potentially immersible or continuously exposed to green water. The preferred paint manufacturer for TechnipFMC is International Paint, other manufactures may be used where required. 3 Definitions • Manufacturer: The entity responsible for the manufacture of the products mentioned within this document. • Supplier: The manufacturer authorised retail entity responsible for delivery of the products in this document. 4 Applicable codes and standards The provision of the supply will have to conform to the latest edition requirements of the following Standards, Codes and Specifications • ISO 8501-1: Rust grades and preparation grades of uncoated steel substrates. • ISO 8501-3: Preparation grades of welds, edges and other areas with surface imperfections. • ISO 8502-6: Extraction of soluble contaminants for analysis – Bresle Test Method. • ISO 8503-1: Surface roughness characteristics of blast cleaning. Rev. 04 Doc. no. MOS-M+C-045 Confidential TechnipFMC – Do not disclose without authorization (uncontrolled if printed) TUK Template no. QMT-F-085 Rev. 06 Page 4 of 16 Protection and Painting Specification for Steel Structures • SSPC-SP1: Surface preparation Standard No.1 - Solvent Cleaning. • SSPC-SP3: Surface preparation Specification No.3 – Power tool Cleaning. • SSPC-SP11: Surface preparation Standard No.11 – Power tool Cleaning to bare metal. • ISO 19840: Measurement of, and Acceptance criteria for, the thickness of the dry film on rough surfaces. • SCM-036: OneFleet Contractor Quality, Health, Safety, Environment and Security Requirements. 5 General rules The following rules are to be applied for any supplier contracted to carry out painting workscopes on OneFleet assets or equipment. • • • • • Prior to any regeneration or rectification works on the current paint system for equipment ,consult relevant paint specification and follow guidance in place. Ensure chosen method of surface preparation is sufficient for the asset or equipment in place prior to starting task. Remove additional or non-required rust converters. Conduct review of current onboard paint stocks, order additional where required to ensure satisfactory levels in place for routine maintenance or upcoming maintenance periods. Follow manufacturers guidance on mixing of paint. • The supplier will have to conform to the Manufacture for details on the procedures to apply. • The Thicknesses given are minimal at all points as defined at all stages within this document. • The supplier will take great care to observe the drying conditions with respect to the degrees of hygrometry and temperature. • Detailed attention will be paid by the Supplier to the physical protection, such as masking or covering of sensitive elements such as hydraulic parts, Flexible hoses, connections, engines, electric parts, junction boxes, sensors, nameplates etc. • Machined surfaces will be protected and abundantly lubricated. • The supplier shall have the means of carrying out depth control of the applied layers and will check that the deposited thicknesses are in conformance with requirements. • Hold points: a TechnipFMC representative shall be notified by the supplier at least 24 Hours in advance and attend at each phase as per the inspection test plan. • The supplier shall submit the following documentation: Calibration certs for inspection equipment, gauges if applicable Certification for any blasting materials used. Personnel Certification for Inspectors as per NACE or equivalent Recording the suitability of the finished product, including a compliance certificate. Application conditions (temperature, Hygroscopy) Drying times actually observed Thickness measurements during controls Location of the points of control on an as built drawing Names, position and dates are required on the paint inspection reports. The company's workforce is responsible for adhering to the following rules when conducting painting work scopes on TechnipFMC assets and equipment: • Rev. 04 Ensure controls are in place with respect to HSE requirements, i.e. permit or routine duty, risk assessment and method statement as per the control of work system. Doc. no. MOS-M+C-045 Confidential TechnipFMC – Do not disclose without authorization (uncontrolled if printed) TUK Template no. QMT-F-085 Rev. 06 Page 5 of 16 Protection and Painting Specification for Steel Structures 6 • Establish physical protection (masking or covering – See section 9) of all required nearby equipment. • Ensure sufficient surface preparation (See section 10) is carried out prior to any painting commencing. • Areas to be painted following surface preparation should be thoroughly inspected before paint application can begin, any minimal surface defects should be corrected prior to application. • Any serious surface defects identified should be reported to and discussed with responsible technical authority before painting can start. • Follow mixing guidance (Insert section) as per manufacturers instructions. • Allow appropriate drying conditions, including time and temperature for the painted area. Certification and safety If a supplier facility is required to be utilised for any painting and coating work scopes the facility intended for use by the supplier must comply with the regulations of the country. The facility must be equipped with ventilation and protective system imposed by applicable local and global legislation. People involved in the protective and painting process must wear all the protective equipment as per applicable legislation and HSE procedures. 7 Equipment masking Physical protection (Masking or Covering appropriately) must be in place prior to any painting or coating workscope. Protection should include sensitive elements considered at risk from damage via surface preparation or painting such as hydraulic parts, hydraulic piping, flexible hoses, cylinder body and shaft, mechanical connections such as hinges, sliding rails and engines, electrical parts, junction boxes, sensors and name plates. Machined surfaces will be protected and abundantly lubricated where appropriate. It is the responsibility of the supplier to protect any sensitive part of the equipment and should be discussed with a TechnipFMC representative prior to any works starting. If ambiguity still exists regarding what should or shouldn’t be protected please contact a relevant TechnipFMC technical authority. Rev. 04 Doc. no. MOS-M+C-045 Confidential TechnipFMC – Do not disclose without authorization (uncontrolled if printed) TUK Template no. QMT-F-085 Rev. 06 Page 6 of 16 Protection and Painting Specification for Steel Structures 8 Rust Converters Over the past years there has been an increased usage of rust or corrosion converters within the fleet as an initial primer during the painting process prior to applying the paint scheme. Generally the rust converters are not intended for such application and ultimately this results on a detrimental effect on the paint system. Several paint manufacturers advised that continued use of these products, possesses risk to the paint certification, coating performance and ultimately to the warranty of the paint systems in place. Rust converters such as Corroseal or Blue Steel, should only be utilised where surface preparation can’t be achieved by other methods and therefore rust and millscale can’t be removed ( ie hard to reach or restricted to tools use areas). The rust converter product should only be applied to the rust and left for the appropriate dwell time, ensuring manufacturers instruction are always adhered to. Rust converters shouldn’t be used as a short cut to or in place of surface preparation, areas to be painted should be appropriately prepared using a pre-agreed method whether blasting, hand or power tooling. NB!! Rust converters are not to be used as primers and should be limited in application across the fleet. Any use of rust converters should be restricted to areas where surface preparation is difficult to achieve. 9 Surface preparation Surface preparation is an integral step in the coating and painting system and when correctly completed ensures the paint can bind satisfactorily with the substrate. It also ensures contaminants such as rust, salts, oils, defects and older coatings are removed prior to painting. Pre any of the mechanical methods of surface preparation the surface should be cleaned or washed sufficiently to assist in surface preparation. Post surface preparation degreasing may be used where appropriate to remove soluble contaminants, please refer to manufacturers instructions when using selected degreasing media. A number of preparation grades, indicating the method of surface preparation and the degree of cleaning, are specified in 8501-1. Each preparation grade is designated by the appropriate letters “Sa” or “St” to indicate the type of cleaning method used. The number following, if any, indicates the degree of cleaning from mill scale, rust and previous coatings i.e. St 2. 9.1 Hand tool cleaning Hand-tool cleaning is considered a manual method and can be used to remove sufficient contaminants where power tooling can’t be progressed. Manual methods include: 9.2 • Hard scraping or slicing. • Chipping. • Wire brushing. Power tool cleaning Power tooling of the surface is a far more effective solution than manual methods and provides a greater preparation standard. However over-power tooling an area can lead to too smooth a surface, creating reduced adhesion, and so particular attention should be given to the area being prepared. Power tool methods include: Rev. 04 • Grinding and sanding. • Rotary scalers and wire brushes. • Impact tools, such as needle guns. Doc. no. MOS-M+C-045 Confidential TechnipFMC – Do not disclose without authorization (uncontrolled if printed) TUK Template no. QMT-F-085 Rev. 06 Page 7 of 16 Protection and Painting Specification for Steel Structures 9.3 Blasting Blasting involves abrasive material being ‘shot’ at the metal substrate at high pressure. The process ensures the particles remove the layers of paint through impact friction. Use of blasting is very limited within our fleet and is normally only considered for renewals to the vessel exterior coating system during a dry dock. 9.3.1 Pre-blasting preparation Sharp edges, fillets, corners and welds shall be rounded or smoothened by grinding to grade P3 (very thorough preparation) as defined in ISO 8501-3 (minimum radius 2mm). The surface shall be free from any foreign matter such as weld flux, residue, spatter, oil, grease, salt, etc., prior to blast cleaning. All surfaces should be washed with clean fresh water prior to blast cleaning. Any major surface defects, particularly surface laminations or scabs detrimental to the protective coating system shall be removed by suitable dressing. Where such defects have been revealed during blast cleaning, and dressing has been performed, the dressed area shall be re-blasted to the specification standard. All welds shall be inspected and if necessary repaired prior to the final blast cleaning of the area. Surface pores cavities etc. Shall be removed by suitable dressing or weld repair. 9.3.2 Blast cleaning Blasting abrasives shall be dry, clean and free from contaminates, which will be detrimental to the performance of the coating. Size of abrasive particles for blast cleaning shall be such that the prepared surface profile height is in accordance with the requirements for the applicable coating. The surface profile shall be graded in accordance with ISO 8503. The cleanliness of the blast cleaned surface shall be to Sa 2.5 in accordance with ISO 8501-1. 9.3.3 Final blasted surface condition The surface to be coated shall be clean, dry and free from oil/grease, and have the specified roughness and cleanliness until the first coat is applied. Any dust, blast abrasives etc., shall be removed from the surface after blast cleaning. Such that the particle quantity and particle size do not exceed rating 2 of ISO 8502-3. All blast cleaned surfaces shall be primed before visible flash rusting occurs or as per paint manufacturers recommendation. 10 Coating system International Paint There are four levels of protection and painting (DT 129, 130, 131 & 132). The level of protection and RAL are defined in the fabrication specification. If this is not the case the level of protection must be asked to TechnipFMC. Any change of the level of protection or the RAL is strictly forbidden until TechnipFMC has given approval. These schemes are designed as economical Repair and Maintenance options for upkeep and repairs to the vessel and equipment whilst at sea or in maintenance periods alongside. Schemes for more comprehensive work should be included as part of a main dry docking specification. As a guideline any paint being applied by brush and roller will apply in microns at the Volume solids of the paint. For example Intershield 300HS has 60% Volume solids and will brush and roller at 60 Microns. To achieve 150 microns will take multiple applications. Rev. 04 Doc. no. MOS-M+C-045 Confidential TechnipFMC – Do not disclose without authorization (uncontrolled if printed) TUK Template no. QMT-F-085 Rev. 06 Page 8 of 16 Protection and Painting Specification for Steel Structures 10.1 DT 129 DT 129 is dedicated to any welded mechanical structure subjected to Marine conditions when the design life is limited. The layer thickness must be respected. Preferred option Coating Dry thickness (pm) International paint product Primary 150 Interzone 954 Completion 150 Interzone 954 Secondary option Coating Dry thickness (pm) International paint product Primary 125 Interseal 670 HS Completion 125 Interseal 670 HS Interzone 954 provides a harder wearing solution and is more surface tolerant of conditions where the ability to prepare the surfaces to be painted may be compromised. Both paints are tintable epoxies which can be supplied in most RAL Colour shades, as a point of note epoxies are susceptible to ‘bloom’ if the temperature falls below 5 Deg. C during application and curing, this does not affect the ability of the paint to perform its function and is purely a cosmetic effect. 10.2 DT 130 DT 130 is dedicated to any welded mechanical structure subjected to marine conditions. The layer thickness must be respected. Preferred option Coating Dry thickness (pm) International paint product Primary 250 Interzone 954 or Interzone 670 Completion 50 Interthane 990E As completion coats any of the following may also be applied though these are more expensive and will tend to be less available than Interthane 990E – Interfine 629 Interfine 691 Interfine 878 or 979 Note: Intergard 269 (Etch Primer / Holding Primer and for preparation on a Galvanised Surface) may be applied as a first coat in this scheme if there is the likelihood of a delay in painting over the prepared surface due to workload or weather issues. 10.3 DT 131 DT 131 is dedicated to any welded mechanical structure subjected to severe marine conditions, such as spray, occasional inundation by green water and located on the weather decks of the vessel. Rev. 04 Doc. no. MOS-M+C-045 Confidential TechnipFMC – Do not disclose without authorization (uncontrolled if printed) TUK Template no. QMT-F-085 Rev. 06 Page 9 of 16 Protection and Painting Specification for Steel Structures Preferred option Coating Dry thickness (pm) International paint product Primary 75 Intershield One 2 One Red Primary 75 Intershield One 2 One Aluminium Completion 50 Interthane 990E Secondary option Coating Dry thickness (pm) International paint product Primary 150 Intershield 300HS Primary 50 Interthane 990E As completion coats any of the following may also be applied though these are more expensive and will tend to be less available than Interthane 990E – Interfine 629 Interfine 691 Interfine 878 or 979 Note: Intergard 269 (Etch Primer / Holding Primer and for preparation on a Galvanised Surface) may be applied as a first coat in this scheme if there is the likelihood of a delay in painting over the prepared surface due to workload or weather issues. 10.4 DT 132 DT 132 is dedicated to any welded mechanical structure subjected to extreme severe marine conditions potentially immersible or continuously exposed to green water. Preferred option Coating Dry thickness (pm) International paint product Primary 150 Intershield 300HS Completion 150 Interzone 954 or Interseal 670HS Secondary option Coating Dry thickness (pm) International paint product Primary 75 Intershield One 2 One Red Primary 75 Intershield One 2 One Aluminium Completion 50 Interthane 990E The primary option will provide the longest term protection for any apparatus/structure or equipment exposed to conditions outlined in the DT132 header and should be used where possible. On the secondary option any of the following may also be applied as completion coats though these are more expensive and will tend to be less available than Interthane 990 – Interfine 629 Interfine 691 Interfine 878 or 979 Rev. 04 Doc. no. MOS-M+C-045 Confidential TechnipFMC – Do not disclose without authorization (uncontrolled if printed) TUK Template no. QMT-F-085 Rev. 06 Page 10 of 16 Protection and Painting Specification for Steel Structures Note: Intergard 269 (Etch Primer / Holding Primer and for preparation on a Galvanised Surface) may be applied as a first coat in this scheme if there is the likelihood of a delay in painting over the prepared surface due to workload or weather issues. 11 Coating system Jotun There are four levels of protection and painting (DT 129, 130, 131 & 132). The level of protection and RAL are defined in the fabrication specification. If this is not the case the level of protection must be asked to TechnipFMC. Any change of the level of protection or the RAL is strictly forbidden until TechnipFMC has given approval. These schemes are designed as economical Repair and Maintenance options for upkeep and repairs to the vessel and equipment whilst at sea or in maintenance periods alongside. Schemes for more comprehensive work should be included as part of a main dry docking specification. As a guideline any paint being applied by brush and roller will apply in microns at the Volume solids of the paint. 11.1 DT 129 DT 129 is dedicated to any welded mechanical structure subjected to Marine conditions when the design life is limited. The layer thickness must be respected. Preferred option Coating Dry thickness (pm) Primary 300 International paint product Marathon 550 Secondary option Coating Dry thickness (pm) International paint product Primary 125 Jotamastic 90 Completion 125 Jotamastic 90 Marathon 550 provides a harder wearing solution with 68mg lost when tested according to ASTM D4060 – Abrasion test and is more surface tolerant of conditions where the ability to prepare the surfaces to be painted may be compromised. Can be applied by roller and brush (recommended for small areas) in one coat with WFT about 250 to 300 microns even by these application methods. Both paints are tintable epoxies which can be supplied in most RAL Colour shades, as a point of note epoxies are susceptible to ‘bloom’ if the temperature falls below 5 Deg. C during application and curing, this does not affect the ability of the paint to perform its function and is purely a cosmetic effect. Epoxies when exposed to sunlight can lead to chalking and loose color and gloss. Rev. 04 Doc. no. MOS-M+C-045 Confidential TechnipFMC – Do not disclose without authorization (uncontrolled if printed) TUK Template no. QMT-F-085 Rev. 06 Page 11 of 16 Protection and Painting Specification for Steel Structures 11.2 DT 130 DT 130 is dedicated to any welded mechanical structure subjected to marine conditions. The layer thickness must be respected. Preferred option Coating Dry thickness (pm) International paint product Primary 250 Marathon 550 or Jotamastic 90 Completion 50 Hardtop XP As completion coats any of the following may also be applied though these are more expensive and will tend to be less available than Hardtop XP – Hardtop AX Hardtop Smart Pack Hardtop Optima Note: Penguard Primer (Etch Primer / Holding Primer and for preparation on a Galvanized Surface) may be applied as a first coat in this scheme if there is the likelihood of a delay in painting over the prepared surface due to workload or weather issues. 11.3 DT 131 DT 131 is dedicated to any welded mechanical structure subjected to severe marine conditions, such as spray, occasional inundation by green water and located on the weather decks of the vessel. Preferred option Coating Dry thickness (pm) International paint product Primary 60 Barrier Smart Pack Primary 100 Jotamastic Smart pack HB Completion 50 Hardtop XP Alternative Preferred option Coating Dry thickness (pm) International paint product Primary 150 Jotamastic Smart pack HB Completion 50 Hardtop XP Secondary option Coating Dry thickness (pm) International paint product Primary 150 Jotamastic 90 Primary 50 Hardtop XP As completion coats any of the following may also be applied though these are more expensive and will tend to be less available than Hardtop XP – Hardtop AX Hardtop Smart Pack Rev. 04 Doc. no. MOS-M+C-045 Confidential TechnipFMC – Do not disclose without authorization (uncontrolled if printed) TUK Template no. QMT-F-085 Rev. 06 Page 12 of 16 Protection and Painting Specification for Steel Structures Hardtop Optima Note: Penguard Primer (Etch Primer / Holding Primer and for preparation on a Galvanised Surface) may be applied as a first coat in this scheme if there is the likelihood of a delay in painting over the prepared surface due to workload or weather issues. 11.4 DT 132 DT 132 is dedicated to any welded mechanical structure subjected to extreme severe marine conditions potentially immersible or continuously exposed to green water. Preferred option Coating Dry thickness (pm) Primary 300 International paint product Marathon 550 Secondary option Coating Dry thickness (pm) International paint product Primary 60 Barrier Smart Pack Primary 100 Jotamastic Smart pack HB Completion 50 Hardtop XP Alternative Secondary Option Coating Dry thickness (pm) International paint product Primary 150 Jotamastic Smart pack HB Completion 50 Hardtop XP The primary option will provide the longest term protection for any apparatus/structure or equipment exposed to conditions outlined in the DT132 header and should be used where possible. On the secondary option any of the following may also be applied as completion coats though these are more expensive and will tend to be less available than Hardtop XP – Hardtop AX Hardtop Smart Pack Hardtop Optima *This option with Polyurethane Topcoat is not recommended for underwater areas. Note: Penguard Primer (Etch Primer / Holding Primer and for preparation on a Galvanised Surface) may be applied as a first coat in this scheme if there is the likelihood of a delay in painting over the prepared surface due to workload or weather issues Rev. 04 Doc. no. MOS-M+C-045 Confidential TechnipFMC – Do not disclose without authorization (uncontrolled if printed) TUK Template no. QMT-F-085 Rev. 06 Page 13 of 16 Protection and Painting Specification for Steel Structures 12 Repair procedure TechnipFMC must be aware of any damage to painting (Transporting, Lifting, etc.). If the painting is damaged or removed on a small area then following repair procedure shall be followed. 13 Level of protection Repair procedure DT 129 DT 129 DT 130 DT 130 DT 131 DT 130 DT 132 DT 130 Stripe coating Stripe coating is the application of extra coats of paint to edges, welds, fasteners, bolts, nuts and other irregular and difficult to reach areas. Stripe coating of those areas makes it possible to employ a more simple and robust spraying procedure on the surrounding areas. Stripe coating is not, however, intended to be a substitute for spray coating, rather a means to build up the thickness in these difficult to spray areas. 13.1 Application When applying stripe coating to inner corners and cavities, care should be taken to avoid excessive film thickness. Brush marks should be levelled out as they may be visible through the subsequent spray applied coating. When the required film thickness cannot be achieved in one pass, the stripe coat must be overcoated “wet on wet” or when the first coat is dry to touch. If possible, stripe coating should be of a different colour than the preceding coat so that the painting progress is easily tracked. It is important to pay special attention to edges, openings, rear sides of stiffeners, scallops, etc. and to apply a stripe coat to all areas where the spray fan may not easily reach or deposit an even film The stripe coat should extend at least 2.5 cm [1 in.] from the edge. Typical areas where stripe coats must be applied include the following (see also the illustrations): • Behind bars • Plate edges • Cut outs i.e. scallops, manholes etc. • Welds, chimes and seam areas • Areas of difficult access • Small fitments of difficult configuration • Areas of pitting The whole point of stripe coating is to achieve the specification, layer by layer. Hence, it is important to keep the thickness of the stripe coating under good control; neither over-apply, nor lacking to achieve the thickness that together with the spray application will provide a sound coating system. Rev. 04 Doc. no. MOS-M+C-045 Confidential TechnipFMC – Do not disclose without authorization (uncontrolled if printed) TUK Template no. QMT-F-085 Rev. 06 Page 14 of 16 Protection and Painting Specification for Steel Structures In case of cross over application, it is recommended to employ extended overcoating intervals to ensure a safe drying level and to avoid building up internal stress in the paint system. 13.2 Coating sequence The recommendation is a minimum of one stripe coat. However, in aggressive exposure conditions or when the object to be painted has a particularly complex structure, there may be good reason to specify two stripe coats. Preferably apply the first stripe coat before the first full spray application. If this is not be possible for practical reasons (e.g. in large tanks where the main surfaces need to be protected against contamination and corrosion), spray the first full coat at first. In those cases, care should be taken to avoid dry spray onto the areas to be stripe coated later on. 14 Appendix 14.1 Examples of grades of rusted steel Examples of the grades of rusted steel are appended below: Rev. 04 Doc. no. MOS-M+C-045 Confidential TechnipFMC – Do not disclose without authorization (uncontrolled if printed) TUK Template no. QMT-F-085 Rev. 06 Page 15 of 16 Protection and Painting Specification for Steel Structures 14.2 Examples of prepared standards Examples of previously grades of rusted steel that have then undergone surface preparation through and hand tooling methods. Please note: the prefixed letter is the original grade i.e. “B” followed by the level of cleaning i.e. “St 3”. +++ End of document +++ Rev. 04 Doc. no. MOS-M+C-045 Confidential TechnipFMC – Do not disclose without authorization (uncontrolled if printed) TUK Template no. QMT-F-085 Rev. 06 Page 16 of 16
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