STA_TILLAMOOK_BAY_(47207)_REQUEST_FOR_CLARIFICATION.pdf

70Z04018QP3063100 STA TILLAMOOK BAY (47207)

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Question 1: WORK ITEM 3: Hull Plating (U/W Body), Inspect

3.2.7 Coating system inspections. The Contractor shall accomplish the below inspections, in conjunction with the underwater hull inspection conducted by the Underwater Hull Inspection Board (UWHIB). Document the condition found as “Partial - Condition A”, “Partial - Condition B”, “Partial Condition C”, or “100%”, as applicable (see 4.1 (Definitions)). Submit a CFR.

NOTE

The following inspections are for determining the existing condition of the coating system for the underwater body surfaces, which are deemed “Critical-coated” surfaces; they must be carried out by a

SSPC-QP-1 certified contractor/sub-Contractor or a NACE

Inspector– see SFLC Std Spec 0000, paragraph 3.2.4.2

(In-process QCmeasures for “critical-coated surfaces”).

3.2.7.1 Visual. Perform a visual inspection of the existing U/W body coating system.

Under the note it is requesting for a QP-1 or NACE Inspector, is this necessary since the bottom of the boat is going to be 100% sand blasted and painted and checked by the QP-1 or NACE Inspector at that time?

Answer 1: No need for DFT’s to be recorded since a 100% UW Hull Preserve will be completed. Since DFT’s do not need to be recorded, the need for a NACE inspector is not required for the UW hull inspection, however, a NACE 3 Coatings Inspector or QP-1

Cert will be required IAW with requirements as stated in Std Spec 0000 (Surface Prep, coating application, coating thickness readings, etc…)

Question 2: WORK ITEM 4: Bulkhead Penetrations, Frame 5, Inspect

1. SCOPE

1.1 Intent. This work item describes the requirements for the Contractor to inspect the bulkhead surfaces and fuel piping penetrations at Frame 5 and renew all r/w system piping, adapter & fitting penetrations.

Scope of work calls out to renew all r/w system piping, adapter & fitting penetrations.

Par 3.4, calls out to put in a change request in for the piping and flange, and is this not covered in par 1.1?

Answer 2: Yes. The scope does call out to replace all r/w system piping, adapter & fitting penetrations. The piping and flange are covered under para 1.1. A change request to replace the piping and flange will not be required.

QUESTION 3: WORK ITEM 5: U/W Body, Preserve (100%)

WORK ITEM 6: U/W Body, Preserve (100%)

Is utilizing the Sherwin Williams NACE inspector still acceptable as in the past?

Due to the extent of ‘critical coated surfaces’ on this project, a third party tech rep is going to add considerable cost. Would it be possible to use CG personnel/PE to witness the inspections or utilize the local Sherwin

Williams NACE level 2 inspector?

Answer 3: No. Contractors will need to follow Std Spec 0000. NACE 3 coating inspector’s independent from any paint supplier will be required as per Std Spec 0000.

70Z04018QP3063100 STA TILLAMOOK BAY (47207)

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Question 4: WORK ITEMS 6: Rub Rail

3.6 Paint schedule. For vessel 47206 and subsequent, area covered by fendering system and aluminum faying surfaces (surfaces of similar or dissimilar materials that are fit closely together and fastened) shall be painted in accordance with CG Drawing 47B-MLB 631-020.

3.4 The Contractor shall apply sealant to the top and bottom of each renewed rub rail in accordance with CG Drawing 47B-MLB 611-020.

There is no scope of work about installing the rub rails as shown on BP#47B MLB 611-020 Rev H sheet 3 of 3 items 8

& 9. Wanted to check to see if we are still sandblasting hull surfaces, inspecting them, applying two coats of the epoxy paint, applying a full coat of 5200 on the hull surface and utilizing the 4200 on the seams?

Answer 4: Yes. Based on section discussing “Clean & Inspect”, the rub rail, fender mounting surfaces, etc shall be inspected and a

CIR submitted with results of inspection and any recommended repairs. The coating system is not to be applied/renewed until a CIR is submitted and a CR approved. A full coating of 5200 and 4200 on the seams will be applied upon re-installing the rub rails.

Question 5: WORK ITEM 14: Cardan Shaft(s), Renew

Are we to renew and alignment check both the P&S Cardan Shafts, or just one side?

Answer 5: Both Cardan Shafts and seals are required to be overhauled/balanced

QUESTION 6: WORK ITEM 33: Bilge Preservation, Auxiliary Space

3.2.4.2 (In-process QC measures for “critical-coated surfaces”).

If I am not mistaken the TCTO for this calls out for the surface prep to be mechanically cleaned to an SSPC-11 and apply two coats of epoxy IAW the Coatings & Color Manual, as we have been doing under the Sea Valve Items from day one of all the 47MLB contracts in the past which is not considered “critical-coated surfaces”and does not note it in the TCTO.

Question: Do you still need a NACE inspection on a non-sand blasted surface that is primed only, that would be like needing a NACE inspection for under the rub rails and in the sea valve area?

Answer 6: SSPC-SP11 surface prep is to be used and a NACE inspector is not required for coating the Aux Space Bilge.

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