Section 1 Verification requirements
Clasification Society 2024 - Version 9.40
Clasifications Register Guidance Information - Guidance Notes for Verifying Application of the Performance Standard for Protective Coatings PSPC-WBT-MSC.215(82) and PSPC-COT-MSC.288(87), February 2021 - Chapter 2 Verification - Section 1 Verification requirements

Section 1 Verification requirements

1.1 Verification before coating application is started

1.1.1 Primary surface preparation and shop primer is the first coating application process. Before primary surface preparation and shop primer, the shipyard shall compile the CTF for pre-job agreement and submit it to LR Surveyors for review. The TPA shall be agreed and signed by three parties, which are shipowner, shipyard and coating manufacturer, before the CTF for pre-job agreement is submitted to LR Surveyors. The contents of the CTF and required action refer to Table 2.1.1 Checklist of the CTF for pre-job agreement.

Table 2.1.1 Checklist of the CTF for pre-job agreement

No Items Activities by three parties Activities by LR Remark
1 TPA Agree and Signature Review  
1.1 IMO PSPC applied area (IMO PSPC Tank/Space Description and Drawings)     Some vessels may include some spaces which could be mistaken to be within the scope of PSPC; for example, some non-bulk carriers include double-side skin spaces (DSSS). The tank arrangement drawings are recommended to be provided for these vessels.
1.2 English to be used for documentation     Sometimes the documents are written in two languages. There could be a difference between the two languages. The TPA should specify that English will prevail.
1.3 The selected coating system and shop primer     Winter grade coatings should be specified if they are used.
1.4 Coating Inspector(s) appointment      
1.5 Assistants to the Coating Inspector(s)      
1.6 Copy of certificates of the Coating Inspector(s)     The certificates shall be valid.
1.7 Quality control process     Include: Inspection items, who will carry out inspection and inspection standards.
1.8 Detailed requirements of coating application and inspection     Include: Surface preparation and coating application requirements for both hull structure and out-fittings, reference standards, inspection notice, coating log forms.
1.9 Settlement of disputes     Provide a procedure to settle the disputes.
1.10 Non-conformity report issuing and closing     Provide a procedure to issue and close non-conformity reports.
1.11 Health and safety     Not mandatory, but should be addressed in the CTF.
2 Copy of Type Approval Certificates for main coatings and shop primer   Review Weldable certificate of shop primer shall also be provided. If winter grade main coatings are used, their Type Approval Certificate shall also be provided.
3 Copy of PTDS for main coatings and shop primer   Review Some manufacturers have an application procedure which shall also be provided.
4 Copy of Safety Data Sheet (SDS) for main coatings and shop primer   Only for information SDSs for both Part A and Part B for all PSPC paint system components shall be provided by paint manufacturers.
5 Procedures for in-service maintenance and repair of coating system   Review In compliance with MSC.Circ.1330 (PSPC-WBT) or MSC.Circ.1399 (PSPC-COT).

1.1.2 Some shipyards may have different formats for the CTF. But the contents listed in the above checklist should be similar and comply with the MSC.215 or MSC.288 requirements.

1.1.3 IMO PSPC applied area shall be in accordance with MSC.215(82) – PSPC-WBT or MSC.288(87) – PSPC-COT.

1.1.4 The selected coating system shall have an LR Type Approval Certificate. The shop primer shall be approved by Lloyd’s Register for weldability. Certificates shall be confirmed to be valid. The details are held in the LR Approvals database.

1.1.5 A qualified Coating Inspector(s) shall be appointed. If there is to be more than one Coating Inspector, there should be a clear definition of authority and responsibilities for each Coating Inspector.

1.1.6 If the Coating Inspector(s) requires assistance from other persons to perform part of the inspections, those persons shall perform the inspections under the Coating Inspector’s supervision and shall be trained to the Coating Inspector’s satisfaction. Training records shall be available for verification.

1.1.7 Validity of qualification certificates of the Coating Inspector(s) is confirmed by the Surveyor. Coating Inspectors should be certified to NACE Coating Inspector Level 2, FROSIO Inspector Level III, or equivalent as verified by LR.

1.1.8 The quality control process and detailed requirements of coating application and inspection shall at least comply with PSPC-WBT or PSPC-COT, respectively. Any additional requirements of the coating supplier, Flag, Class or Owner can also be included.

1.1.10 The shipyard is responsible for implementation of national regulations to ensure the health and safety of individuals and to minimize the risk of fire and explosion.

1.1.11 PTDSs are checked in compliance with LR Type Approval Certificates and PSPC-WBT or PSPC-COT respectively.

1.1.12 SDSs are available for information.

1.1.13 Procedures for in-service maintenance and repair of coating system shall be prepared by the paint maker in compliance with the guidelines – MSC.Circ.1330 for PSPC-WBT and MSC.Circ.1399 for PSPC-COT.

1.1.14 All interpretations shall be in compliance with SC223 and SC259 respectively.

1.1.15 For the shipyard who intend to retain the intact shop primer during block blasting, an initial shop priming line audit shall be carried out by LR Surveyor(s). The Approved Inspector should participate in the shop priming line audit process as early as possible after being appointed. The Approved Inspector will then be included as a signatory in the audit process. It may also be decided that the main coating supplier participates in the audit process. The audit will be recorded in the form – Figure 2.1.5 Shop priming plant verification checklist. A different form may be used to record the audit.

1.1.16 If the shop priming line cannot be accepted by the LR Surveyor(s), the intact shop primer should be 100 per cent fully removed by blasting to Sa 2½ during block blasting.

1.1.17 If the shop primed steel is purchased from a location or supplier other than the shipyard, the steel shall have all the relevant quality control documents from that supplier or location, and confirmation that the local LR Surveyor has witnessed and also supplied the relevant completed forms. This also includes finished or semi-finished blocks supplied from a different site or manufacturer. Otherwise, the intact shop primer shall be 100 per cent fully removed by blasting to Sa 2½.

Figure 2.1.1 An example of coating log (primary surface preparation)

Figure 2.1.2 An example of coating log (secondary surface preparation)

Figure 2.1.3 An example of coating log (coating application)

Figure 2.1.4 An example of coating log (dry film thickness measurement)

Figure 2.1.5 Shop priming plant verification checklist

1.2 Verification during coating application

1.2.1 The qualification of the Coating Inspectors shall be verified. For ‘Approved Inspectors’ unknown to Lloyd’s Register, on-site verification will be required as early as possible. For inspectors known to LR, spot check verification is acceptable.

1.2.2 LR will record their monitoring verification details in the LR PSPC Checklists, Form 1215 (WBT and COT).

1.2.3 LR is to confirm that the shipyard’s QC system ensures that all calibration certificates for inspection instruments are maintained up to date. If not, LR will require all current certificates for review.

1.2.4 All sections of the Form 1215 shall be completed on a regular basis and be retained for future reference.

1.2.5 There are five sections in Form 1215 which are used to record inspection verification details. Table 2.1.2 Form 1215 vs inspection processes lists the five sections of Form 1215 with guidance for verification of the critical inspection processes.

Table 2.1.2 Form 1215 vs inspection processes

No Form 1215 Inspection processes
1 Primary surface preparation and shop primer application Primary surface preparation and shop primer
2 Steel preparation Sharp edge treatment after steel cutting
    Sharp edge, welds and steel defects treatment at block stage
3 Secondary surface preparation Blast-cleaning of block
4 Surface preparation for erection (or pre-erection) welds and damages Surface preparation for pre-erection joints and coating damages
Surface preparation for erection joints and coating damages
5 Main coating application The 1st spray coat application of block
    The 2nd spray coat application of block
    The final coating inspection of block
    The 1st spray coat application after erection or pre-erection
    The 2nd spray coat application after erection or pre-erection
    The final coating inspection after erection or pre-erection
    The tank final coating inspection before delivery

1.2.6 There are two types of Form 1215. They are Form 1215-WBT, which is applied to water ballast tanks and double-side skin spaces, and Form 1215-COT, which is applied to cargo oil tanks of crude oil tankers.

1.2.7 Monitoring of the coating inspection requirements, as required by the MSC.215(82) and MSC.288(87) (Section 7.5), means checking, on a representative sampling basis, that the inspectors are using the correct equipment, techniques and reporting methods, as described in SC223 and SC259.

1.2.8 This will require that the Approved Inspector physically demonstrates to the LR Surveyor that inspection procedures are properly carried out and are accurately recorded in the appropriate reports. Examples of these reports are shown in Figure 2.1.1 An example of coating log (primary surface preparation), Figure 2.1.2 An example of coating log (secondary surface preparation), Figure 2.1.3 An example of coating log (coating application) and Figure 2.1.4 An example of coating log (dry film thickness measurement).

1.2.9 The LR Surveyor can choose to attend the inspection together with the three parties or after the three parties complete the inspection items. The LR Surveyor can use the data collected in the inspections to verify the reports issued by the Approved Inspectors.

1.2.10 An appropriate level of inspections to be monitored by Surveyors should be agreed during the kick-off meeting. It is recommended to include:
  • Approximately 10 per cent of block inspections;
  • A minimum of two hull stage tank inspections;
  • A minimum of two pre-delivery tank inspections.
1.2.11 These inspections are recommended to include monitoring of the following critical inspection processes:
  • Block blasting;
  • Block final coating inspection;
  • Block 1st coat application;
  • Block 2nd coat application;
  • Surface preparation after erection and pre-erection (if applicable);
  • Final coating inspection after erection and pre-erection (if applicable);
  • 1st coat application after erection and pre-erection (if applicable);
  • 2nd coat application after erection and pre-erection (if applicable);
  • Sharp edge treatment after steel cutting;
  • Sharp edge, welds and steel defects treatment of block.

1.2.12 For the shipyard who intend to retain the intact shop primer, the verification of the primary surface preparation and shop primer should be carried once for each vessel.

1.2.13 For the shipyard who will 100 per cent fully remove by blasting the intact shop primer to Sa 2½, the physical spot check of primary surface preparation and shop primer can be omitted.

1.2.14 Non-conformances are to be documented in a Non-Conformance Report (NCR) and closed off by the Approved Inspector after correction.

1.2.15 Non-conformances are considered non-compliances, if the shipyard or contractor refuses to repair. Where the repair is specified to be carried out at a suitable later date in the contract, the NCR will remain in place to act as a reminder until the repair is successfully completed.

1.2.16 Routine requirements for repair after inspection will not be subject to an NCR if repair is to be carried out immediately. Inspections resulting in rejection should be detailed in the Preparation & Application Progress Report.

1.3 Verification after coating completion and prior to ship delivery

1.3.1 The shipyard shall complete the CTF for delivery in accordance with the PSPC-WBT and PSPC-COT (only for cargo oil tanks of crude oil tankers) and ensure that all the required documentation is included.

1.3.2 The CFT shall be submitted to the Surveyor for review prior to delivery. Table 2.1.3 The checklist for the CTF for delivery provides a checklist for the review of the CTF for delivery.

Table 2.1.3 The checklist for the CTF for delivery

No. Item Remarks
1 The CTF for pre-job agreement The cover page should be signed by the LR Surveyor.
2 The Amendment or supplementation of the Tripartite Agreement (if any) In some cases, the TPA has been modified or supplemented; for example, if the Coating Inspector(s) is replaced during the construction process.
3 Copy of Updated Certificates for Coatings and Coating Inspectors (if any) In some cases, the certificates of the Coatings and Coating Inspectors may expire during the construction process.
4 Copy of Updated PTDS and SDS (if any) The PTDS and SDS could be updated by the paint manufacturer during the construction process.
5 Coating logs and work records Confirm the forms used are the same as specified in the TPA, the coating logs and work records are completed, and the data is correct.

1.3.3 It shall be confirmed that all relevant reports have been signed by the Approved Inspector(s) confirming that inspections have been carried out in accordance with the MSC.215(82) and MSC.288(87) (only for cargo oil tanks of crude oil tankers), the PTDS and all other agreed documentation. The Surveyor is also to confirm inspections have been carried out to the satisfaction of the coating supplier's representative.

1.3.4 Prior to delivery, the Surveyor is to confirm that a copy of the CTF has been given to the Owner for placement on board. A copy of the completed CTF is to be retained by LR for their records.

1.4 Verification Procedural Flow Chart

1.4.1 LR Verification Procedure Flow Chart refers to Figure 2.1.6 LR verification procedural flow chart. The chart outlines the key stages of verification listed in the PSPC-WBT and PSPC-COT requirements. LR verification requirements from Item 6 to Item 12 are summarized in Table 2.1.4 PSPC-WBT and PSPC-COT verification procedures.

Figure 2.1.6 LR verification procedural flow chart

Table 2.1.4 PSPC-WBT and PSPC-COT verification procedures

PSPC-WBT and PSPC-COT verification procedures
 
These Guidelines are intended to assist in the LR verification and should be used together with the working procedures agreed in the pre-job meeting. LR is to check, on a sampling basis, that the Approved Inspector uses the correct equipment, techniques and reporting methods.
Item PSPC Requirement Comment
Before Start
Primary surface preparation and shop primer

PSPC Requirements refer to Figure 2.1.5 Shop priming plant verification checklist

Sharp edge, welds and steel defects treatment
Removal of sharp edges See comment All sharp edges should be rounded to a minimum of 2 mm radius. The PSPC requires 3 pass grinding; however, other methods will be acceptable to LR provided the required standard is achieved.
Removal of undercuts / laminations / spatter / other steel defects ISO 8501-3 Grade P2  
Removal of oil and grease To be removed Visual or Water droplet test – Water must wet out surface to be tested. (UV lamp may be proposed but this method will only be effective with certain types of oil and grease.)
Surface Preparation
Blocks Welds and corroded areas Sa 2½ ISO 8501 – 1 The ISO 8503 Comparator method does not include grade 30 μm to 75 μm. The profile will therefore be judged using the appropriate medium grade comparator. Note that there are two types of comparator, one for grit and one for shot.
Profile 30 μm to 75 μm
Damaged shop primer ISO 8503-1 and 2
Intact shop primer See the coating’s Type Approval Certificate The ‘Type Approval Certificate’ PTDS, LR primary surface preparation audit and the PSPC will indicate the minimum required standard of preparation.
Block pre-erection & Tanks Erection joints St 3 ISO 8501 - 1 or The coating supplier may require a minimum surface profile after grinding / discing (see PTDS). If areas are to be blasted, suitable procedures should be put in place to avoid over blast damage.
Sa 2½ ISO 8501 - 1
Blast profile as above
Damages St 3 ISO 8501 - 1 or If damages > 2% of the total area then blasting to Sa 2½ is mandatory. The Hull Stage Tank report requires that the damaged area be estimated and recorded.

For cargo oil tanks of crude oil tankers, damages > 3% in the deck head or damages > 20% in the tank top then blasting to Sa 2½ is mandatory.

If damages are to be blasted, a minimum area per damaged spot must be agreed prior to the start of blasting and steps taken to avoid over blast damage. Small isolated areas of damage should be mechanically repaired. If widespread small damages are present, then the entire affected area should be blasted to avoid unnecessary over blast damage.

Note that over blast damage can be very difficult to see, hence the importance in taking adequate steps for its prevention.

Sa 2½ ISO 8501 - 1
Blast profile as above
Areas >25 m2 Sa 2½ ISO 8501 - 1 For areas greater than 25 m2 blasting to Sa 2½ is mandatory.
Blast profile as above
Overlap areas The agreed method of abrasive cleaning must be acceptable to the coating supplier and ensure acceptable inter-coat adhesion.
Soluble Salt test – Surfaces ISO 8502-9 or NACE SP0508-2010 ≤ 50 mg/m2 The minimum number of tests per block or tank should have been agreed at the pre-job meeting. Additional tests may be necessary depending on conditions at the time of verification. PSPC requires a minimum of one test per block. Sampling should be by Bresle Patch or similar (Size A-1250, i.e. 1250 ± 13 mm2) and conductivity measured in accordance with ISO 8502-9. Tests should focus on areas most likely to be contaminated or on areas likely to have been 'missed' during the cleaning process, e.g. behind bars, tank floors, areas of corrosion, etc.
PSPC-WBT and PSPC-COT verification procedures (continued)
These Guidelines are intended to assist in the LR verification and should be used together with the working procedures agreed in the pre-job meeting. LR is to check, on a sampling basis, that the Approved Inspector uses the correct equipment, techniques and reporting methods.
Item PSPC Requirement Comment
After surface preparation and before 1st coat
Dust removal ISO 8502-3 Rating 1 Class '3', ‘4' or '5' The dust quantity rating is not to exceed quantity rating 1 for dust classes ‘3’, ‘4’ or ‘5’. Dust of lower classes is to be removed if visible on the surface without magnification.
Air Temp °C   Q.C. to monitor conditions during and after application until work is completed.
RH ≤ 85%  
Steel Temp (≥ 3°C higher than Dew Point)  
Dew Point °C  
Drum identification and batch number to be verified To comply with the PSPC and the PTDS Batch number of both the base and curing agent to be recorded in the coating report. Normally only one batch will be required for any single area. The Approved Inspector must agree if more than two batches are to be used in any area and record the reasons in the Preparation & Application Record.
Note: The PSPC Standards do not specify ambient conditions during surface preparation. It is important, however, to confirm that ambient conditions required for coating are achieved before the cleaning inspection is started. If ambient conditions do not meet dew point/RH/surface and air temperature criteria, the quality of surface preparation is likely to deteriorate before application of the first full coat and stripe coat is complete.
Coating application should commence as soon as possible after surface preparation has been accepted and must be completed before any visible deterioration has occurred.
Separate preparation and cleaning inspections may be preferred to avoid re-cleaning if surface preparation is not accepted. Depending on shipyard practice, however, cleaning and surface preparation inspections may be carried out simultaneously. Loose spatter should be removed before the cleaning inspection. Cleaning inspections should always be carried out from the tank top down.
After 1st Spray Coat application
Coatings to be free from:
  • sags, runs and puddles
  • craters
  • pinholes
  • bubbles
  • holidays inclusions
  • other defects
Steps must be taken to avoid similar problems in the future If defects are widespread or if considered significant the cause must be urgently investigated. If necessary, coating activities should be halted until the cause of the defect is remedied.
DFT spot check
  • flat surfaces
  • longitudinal stiffeners
  • transverse stiffeners and girders
  • large brackets and primary supports around openings
  • areas inaccessible by airless spray
  As considered necessary by the Approved Inspector.
Excessive thickness removed   To be repaired in accordance with the supplier’s recommendations.
Before subsequent full coats and stripe coats
Over coating interval To comply with the PTDS  
Adequate ventilation in place   To comply with the Tripartite Agreement, PSPC and PDS.
Bulk contamination removed
Dust removal
Inclusions
Air Temp Inclusions to be removed and the coating repaired in accordance with the supplier’s instructions.
RH
Steel Temp
Dew Point
Drum identification and batch no. verified
PSPC-WBT and PSPC-COT verification procedures (continued)
These Guidelines are intended to assist in the LR verification and should be used together with the working procedures agreed in the pre-job meeting. LR is to check, on a sampling basis, that the Approved Inspector uses the correct equipment, techniques and reporting methods.
Item PSPC Requirement Comment
After Stripe Coating
Coatings free from:
  • inclusions
  • pinholes
  • sags, runs and puddles
  • other defects
   
Film continuity
  • welds
  • edges
  • cut outs
  • areas inaccessible by airless spray
  Scallops and rat holes, etc. to be verified using a mirror as necessary.
The substrate should not to be visible.
The sequence of stripe coats will normally be agreed at the pre-job meeting. It may be that both stripe coats are applied between the first and second full coats. Normally each full coat and intermediate stripe coat will be a different colour from its substrate. If the second stripe coat is to be applied after the second full coat it is normal practice to apply the same colour as the last full coat. The extent of the second stripe coat will be agreed at the pre-job meeting.
Final Coat Verification
Coatings to be free from:
  • inclusions
  • sags, runs and puddles
  • craters
  • pinholes
  • bubbles
  • other defects
Steps must be taken to avoid similar problems in the future 1. Inclusions to be removed and repaired according to the supplier’s recommendations
2. Sags, runs and puddles, if present, will normally be caused by poor application technique. In exceptional cases the cause may be a batch or formulation problem.
3. Defects such as craters, pinholes and bubbles may be caused by surface contamination or surface condition, ambient conditions, application techniques or problems with the product. If present, the cause should be investigated immediately to avoid re-occurrence in other blocks or tanks.
 
Depending on the extent of the defect it may be necessary to halt production until the problem can be resolved.
Film continuity
  • flat surfaces
  • welds
  • edges
  • cut outs
  • areas inaccessible by airless spray
  Scallops and rat holes, etc. to be verified using a mirror as necessary.
The substrate should not to be visible.
DFT check:
  • flat surfaces
  • longitudinal stiffeners
  • transverse stiffeners and girders
  • large brackets and primary supports around openings
  • areas inaccessible by airless spray
SSPS-PA2:2004 LR will confirm that the DFT procedures as detailed in PSPC Annex 3 are being followed by the Approved Inspector. The Approved Inspector will demonstrate to LR by a series of spot checks that measurements are taken in the areas as required by the PSPC. The Approved Inspector will also demonstrate that measured DFTs are in accordance with the Type Approval Certificate, the PTDS and the PSPC.

Note: The PSPC refers to NDFT (Nominal Dry Film Thickness) and a 90/10 rule. This means 90% of all thickness measurements shall by greater than or equal to the NDFT, and none of the remaining 10% shall be below 0.9 x NDFT (see Table 1.1.5 of the PSPC). Excessive thickness must also be avoided and be within the coating supplier's maximum values quoted in the PTDS.

It is not the responsibility of LR to verify the overall condition of the block or tank or to carry out the verification without the presence of the Approved Inspector.

&
PSPC Annex 3
Excessive thickness   To be repaired in accordance with the supplier’s recommendations.

Note: The Pre-delivery (Completion) Inspection should be carried out after sea trials / ballasting whenever possible.


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