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47278 BID QUESTIONS FOR 70Z04021QP3053200

Question 1: WORK ITEM 1: General Welding, Provide

Question: Are we to use 5456 aluminum materials for the fabricated parts on the tow reel?

APM Answer: Yes Question 2: WORK ITEM 3: Hull Plating (U/W Body), Inspect

Paragraph 3.2.7 NOTE

Question: For the small boats this has always been removed in the past since all this is asking for a visual inspection only under 3.2.7.1. for the condition, the paint is in, which is meaningless, since the UWB paint system on the boats are being completely renewed 100% which will be covered by the NACE inspector at that time and should not need a NACE

Inspector for it?

APM Answer: This Section was a Mistake on the APM’s Part.

This is a Visual inspection and requires no tooke gauge inspection. No Nace inspector is required.

Question 3: WORK ITEM 6: Rub Rail, Remove, Inspect, and Install

3.4 Reinstallation. After the completion of all inspections and any authorized repairs, the Contractor shall re-install each rub rail section, using new nylon insert locking nuts.

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.

Question: 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. Under Paragraph 3.6 wanted to check to see if we are still sandblasting the hull surfaces not mechanically cleaning them, inspecting

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 QC measures for “critical-coated surfaces”).

RElliottDougherty Underline

RElliottDougherty Underline them, applying two coats of the epoxy paint, applying a full coat of 5200 sealant on the hull surface then utilizing the 4200 sealant to seal up the seams and edges?

APM ANSWER: Yes the spec is somewhat vague on the work required. Based on paragraph 3.3.1(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 4: WORK ITEM 9: Tanks (MP Fuel Service), Clean and Inspect

3.9 Ultrasonic thickness (UT) measurement. The Contractor shall take a total of 50 UT measurements of tank plating, in locations designated by the Coast Guard Inspector, in accordance with SFLC Std Spec 0740, Appendix C. Use Coast Guard Drawing { } as guidance. Submit a CFR.

Question:

Is this supposed to be part of this spec, on the past contracts this was deleted?

APM Answer: Yes this is a misprint. DO not conduct any UT shots in the fuel tanks.

Question 5: WORK ITEM 18: Main Diesel Engine Exhaust System, Clean And Inspect.

3.2.1 Exhaust splitter valve. The Contractor shall remove the exhaust splitter isolation valve from the crossover pipe between the two mufflers and renew with new valve.

3.3.1 The Contractor shall overhaul the exhaust splitter valve with Contractor- furnished overhaul kit in accordance with manufacturer’s instructions. Renew all manufacture approved gaskets and O-rings.

Question: These kind of contradict each other, and after researching the valve company information on the overhaul, and available kits, the valve company states that those valves are not overhaulable and need renewed because they will never pass the pressure test or seal properly again.

Do you want the contractors to supply new valves as part of the bid instead of overhaul?

APM ANSWER: Valve needs to be renewed, those valves cannot be overhauled so I would like them renewed. I accidently forgot to update 3.3.1

Question 6: WORK ITEM 23: Sea Strainers - Sea Strainers - Duplex (All Sizes), Overhaul.

3.3 Reinstall. After completion and acceptance by the Coast Guard Inspector; the

Contractor shall reinstall all overhauled, cleaned, and new strainers to their original locations, as shown on Coast Guard Drawing 47B-MLB 505-020 and TP 3359. Renew all gaskets with material conforming to ASTM D1330 of the same size and configuration as those gaskets removed. Renew all hardware with nickel-copper alloy fasteners.

Question: Are we to renew fasteners with in-kind materials, not nickel-copper alloy?

APM ANSWER: YES in kind

Question 7: WORK ITEM 23: Sea Strainers - Sea Strainers - Duplex (All Sizes), Overhaul.

3.6 Contractor’s option for strainer renewal. The Contractor may opt to renew strainers designated for overhaul if preferable for the Contractor, and is at no additional cost to the

Government. New strainers shall be equivalent (including identical material) to the strainer being renewed. Visually inspect the piping and mounting arrangements, and submit a CFR detailing any required modifications to accommodate the new strainer(s).

Question: In the past, we have always had these strainers as GFE if they were not overhaulable, because why would the contractor spend $6,000.00 on the new strainers when if the strainers were overhaulable, only costing about $1,000.00. Does not make fair bidding for the contractor to gamble they are in good condition, then if not, must purchase new ones.

Should be a change request if they not overhaulable, or will the GFE listed be available without contractor cost?

APM Answer: Yes PE/COR will request as GFE if they cannot be overhauled. Bid for

Overhaul

Question 8: WORK ITEM 24: Sea Strainers - Simplex (All Sizes), Clean and Inspect

3.2.3 Reassemble. After completion and acceptance by the Coast Guard Inspector, reassemble all strainers. Renew all hardware with nickel-copper alloy (Monel) fasteners.

Question: Are we to renew fasteners with in-kind materials, not nickel-copper alloy?

APM ANSWER: YES in kind