Sol_No._70Z04018QP3068800_A00001__(Cont.).pdf

SOL NO. 70Z04018QP3068800

A00001 (CONT’D)

REVISION RECORD

DATE REV# WORK ITEM# CHANGES MADE

25APR18

1 WORK ITEM:

Deleted these items from Section 3.3 and Deleted Table 1

• One linear foot of welding/brazing.

• Four square inches of clad/overlay welding.

• One hour of fabrication.

• One square foot of plate renewal.

25APR18 1 WORK ITEM:

Updated WI in section 3.3 to reflect contractor will remove cables to renew kick pipes.

25APR18 1 WORK ITEM :

Removed requirement for Nace Inspector. And DFT measurements.

25APR18 1 WORK ITEM:

Sections 4.1 and 4.2 have been Deleted.

25APR18 1 WORK ITEM:

Updated Section 3.3 Installation.

25APR18 1 WORK ITEM:

Updated GFE shaft seal dimension.

25APR18

WORK ITEM:

Updates scope of work from Section 3.3 down

NOTE : All work item and paragraph numbers listed above for a given revision correspond to same numbers in the previous revision. This revised specification is self-contained with all of the above listed changes incorporated.

Sol No. 70Z04018QP3068800 A00001 (cont’d)

Question 1: WORK ITEM D-1 General Welding, Provide

3.3 Bidding. The Contractor shall ensure for bidding purposes this specification will be broke down by the following:

• One linear foot of welding/brazing.

• Four square inches of clad/overlay welding.

• One hour of fabrication.

• One square foot of plate renewal.

I don’t see this in other bids, are we to give bid prices to these items, and will the COTR designate the jobs for these items?

ANSWER 1: These 4 sections have been deleted from the package. Updated in REV-1

Question 2: WORK ITEM D-1 General Welding, Provide

3.3 Bidding. The Contractor shall ensure for bidding purposes this specification will be broke down by the following:

• FORWARD BUOYANCY CHAMBER AND OPEN BRIDGE: (05 qty) electric cable kick pipe caps all seized. Caps seized. Request cut off and renew (05) new kick pipes and caps. Remove any interference.

Contractor to supply materials needed for renew.

Question: Is the contractor responsible for the removal of the electric cable, or will the USCG EM’s remove the cable?

ANSWER 2: updated REV-1 Reflects that it is the Contractors responsibility to remove through cables.

Question 3: WORK ITEM D-1 General Welding, Provide

3.3 Bidding. The Contractor shall ensure for bidding purposes this specification will be broke down by the following:

• FOREPEAK: Approx FR15. 2 cracked welds, Repair (02) 1 inch cracks.

• FORWARD BUOYANCY CHAMBER AND OPEN BRIDGE: (05 qty) electric cable kick pipe caps all seized. Caps seized. Request cut off and renew (05) new kick pipes and caps. Remove any interference.

Contractor to supply materials needed for renew.

• AFT LADDER: Repair Cracked weld(s) on aft ladder. (03) 1 inch cracks

• BRIDGE VISOR: Visor overhang above windshield wiper centerline, Repair cracked weld. (01) 1 inch crack.

• FWD HANDRAILS: Unit found a few areas around deck welds on Fwd handrails

(Port/Stbd) that has corrosion and possible hairline cracks. Repair (03) 1 inch cracks

• AFT PORT VENT COVER: While u/w the hoisting cable while taking tension got caught on the aft port vent cover and gouged out approximately 1/4 inch of aluminum from the bottom of the vent cover causing a groove, request fabrication of new cover.

• AFT BUOYANCY CHAMBERS: Corrosion/deep pitting found in port, centerline, and stbd aft deck box's (buoyancy chambers) Clad Weld approx 10 deep pits in Port Chamber (approx 1square foot ). clad weld approx 10 deep pits in Centerline chamber (approx 1 square foot). Clad Weld approx 15 deep pits in STBD chamber (approx 1.5 square feet)

• AFT OF TOW BIT ON DECK: Clad weld approx 15 Deep pits (approx 1.5 square feet).

• FWD PORT BUOYANCY CHAMBER: Clad Weld approx 10 deep pits (approx 1 square foot).

• FWD STBD BUOYANCY CHAMBER: Clad weld approx 10 Deep Pits (approx 1 square foot) • FWD COMPARTMENT: Clad Weld approx 08 deep pits approx 08 square inches.

Question: Is it possible to get pictures of these repair areas like we have in the past?

ANSWER 3: Site visit is recommended, pictures will not be provided.

Question 4: WORK ITEM D-1 General Welding, Provide

3.3 Bidding. The Contractor shall ensure for bidding purposes this specification will be broke down by the following:

TABLE 1 – PLATE TYPE

THICKNESS

WEIGHT PER

SQFT

TYPE/GRADE

THICKNESS

WEIGHT PER

SQFT

TYPE/ALLOY

3/16 (.1875) 7.66 lb 1/4 (.250) 10.21 lb 1/4 (.250) 3.53 lb 5/16 (.3125) 12.76 lb 5/16 (.3125) 4.41 lb 3/8 (.375) 15.31 lb 3/8 (.375) 5.29 lb 1/2 (.500) 20.42 lb 1/2 (.500) 7.06 lb

Question: Is the alloy 5456 on all of these?

ANSWER 4: TABLE Deleted from REV-1 SPEC. Yes alloy 5456

Question 5: 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.

Question: 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 5: No need for DFT’s to be recorded since WI 5 requires a 100% UW Hull Preserve. 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 will be required IAW with requirements as stated in Std Spec 0000 (Surface Prep, coating application, coating thickness readings, etc…)

Question 6: WORK ITEM 3: Hull Plating (U/W Body), Inspect

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

3.2.7.2 Dry film thickness (DFT) measurements. Take total DFT measurements of the U/W body coating system, in accordance with SSPC-PA 2.

NOTE

The Tooke Paint Inspection Gage/Gauge (Plastic) is a precision tool for inspection and thickness measurement (ASTM D4138) of single or multiple coats on any substrate, and for microscopic observation and measurement of substrate and film defects. The gage uses an illuminated 50-power microscope with measuring reticle, and mounts tungsten carbide cutting tips for precise incision of the work surface.

Direct measurement of total coating thickness and thickness of individual coats of paint is a unique capability of the Tooke Paint Inspection Gage/Gauge. Thus, in addition to routine use, it often serves as a “referee” instrument to calibrate indirect or non- destructive thickness measuring instruments.

Other uses include assessment of substrate conditions and coating adhesion, and observation of microscopic cracking, tendency for brittleness, cratering, or other microscopic film symptoms.

Question: Is this a new required procedure that the USCG is starting to use?

ANSWER 6: No need for DFT’s to be recorded since WI 5 requires a 100% UW Hull Preserve. 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 will be required IAW with requirements as stated in Std Spec 0000 (Surface Prep, coating application, coating thickness readings, etc…)

Question 7: WORK ITEM 4: Hull Plate, Renew

1.1 Intent. This work item describes the requirements for the Contractor to crop out and renew hull plating from approximately four inches aft of frame one to approximately four (04) inches aft of frame four (04) and outboard approximately six (06) inches from the keel, port and starboard. To Include:

• Outboard of Port Reduction Gear, Excessive corrosion/deep pits. Crop/Renew approx. 08 square feet.

• Under/ In front of STBD Reduction Gear, Excessive corrosion/deep pits. Crop/Renew approx 06 Square feet.

Question: Can these work items be completed without removing the Red Gears, and if they are to be removed will this be a change request?

ANSWER 7: Work Items can be completed without removal of reduction gears. If there is issues submit CFR and work with Coast Guard PE/COR

Question 8: WORK ITEM 4: Hull Plate, Renew

1.1 Intent. This work item describes the requirements for the Contractor to crop out and renew hull plating from approximately four inches aft of frame one to approximately four (04) inches aft of frame four (04) and outboard approximately six (06) inches from the keel, port and starboard. To Include:

• AFT BUOYANCY CHAMBERS: From the Deck/Rubrail up CROP/RENEW 8 inch insert that runs the full length from PORT to STBD. CROP/ RENEW Approx 15 square feet. Currently there are multiple repairs made in the buoyancy chambers on the stern. Corrosion and Pitting needs to be corrected with 8 inch insert.

Question: Are there pictures available for the repair area?

Answer 8: Recommend Site visit. Pictures are difficult to document scope of work. Pin holes throughout are not captured in pictures.

Question 9: WORK ITEM 4: Hull Plate, Renew

3.2.2 Ultrasonic thickness (UT) measurement. The Contractor shall take a total of 100 UT measurements of the hull plating in locations designated by the Coast Guard Inspector, in accordance with SFLC Std Spec 0740. Perform a UT inspection of the affected plating beyond the areas described in paragraph 3.2 to determine the boundary of sound material. Chalk out the boundary of the corroded plating where the remaining thicknesses are less than 75% of the original thickness as shown on Coast Guard Drawing

47B-MLB 110-500. Submit a CFR.

Question: Are these UT shots covered under D-2 or addition to?

Answer 9: This should not be in addition to the 100 UT shots called out in D-2. The hull plate renewal is based on pitting noted on the hull plating and not due to thinning. The PE will direct the contractor on the 30 UT shot locations as per WI D-2.

Question 10: WORK ITEM 4: Hull Plate, Renew

3.2.4 Pre-welding requirements. The Contractor shall follow the DDEC disconnect procedures in accordance with Textron Service Bulletin 001(Pre Welding Requirements) as listed in Coast Guard Technical Publication 3355, prior to any welding.

Question: Is this work being completed by USCG personnel as per SFLC 0000?

ANSWER 10: THIS will be Conducted by USCG personnel

Question 11: WORK ITEM 6: U/W Body, Preserve (100%)

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

ANSWER 11: 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.

Question 12: WORK ITEM 7: Rub Rail, Remove, Inspect and Install

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.

3.6 Preparation/Preservation. 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. Wanted to check to see if we are still sandblasting the hull surfaces, inspecting 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?

ANSWER 12: 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 13: WORK ITEM 10: Tanks (Mp Fuel Service), Clean And Inspect

4. NOTES

4.1 Tank content removal. The Ship’s force will pump down the tanks to the maximum extent possible with the installed pumping system.

4.2 Tank content restoration. The Ship’s force will procure new fluids and refill all tanks at the appropriate time.

Question: Is this correct, and then is Work Item 25 being eliminated?

ANSWER 13: Sections 4.1 and 4.2 have been removed from the SPEC. Updated in REV-1

Contractor is responsible for pumping out fuel and disposing.

Question 14: WORK ITEM 12: Water-tight Closures, Inspect

3.2 Inspect. The Contractor shall inspect weather-tight closures and mounting hardware in accordance with CG DWG MLB 167-010, 47B-MLB 801-010, and Std Spec 0740. Submit a CFR for the following:

• Door Seal(s)

Question: Are we to chalk test all of the hatches as well, as we have done in the past?

Answer 14: Chalk TEST all doors and hatches listed in TABLE-1 of spec.

Question 15: WORK ITEM 14: Main Diesel Engine, Remove and Install

3.3 Installation. Install the engines in accordance with CG DWG 47B-MLB 201-010 and TP-3918C.

Question: Are we to renew all of the soft patch gaskets and fasteners as well?

ANSWER: REV-1 will reflect 3.3 Installation. Install the engines in accordance with CG DWG 47B-MLB 201-010 and TP-3918C. Renew Soft Patch gaskets and fastners for both PORT and STBD

Question 16: WORK ITEM 16: Propulsion Shaft, Remove, Inspect, and

Install

NSN: 2040-01-497-

$280.27

3.11 Renew. The Contractor shall renew all fasteners, hardware, lockwire and isolators and the mechanical shaft seal listed in Government-furnished equipment. Install in accordance with manufacturer’s instructions, TP 3359 and Coast Guard Drawing 47B-MLB 243-010.

Question: Just FYI, this should be 3-3/4 not 3 1/2 , unless that is what you want the contractors to install?

ANSWER: SHAFT SEAL 3 ¾ has been updated in Rev-1 SPEC

N Shaft Seal (3-3/4”) PN: 02-212-334 2 ea. $465.00

Question 17: WORK ITEM 20: Standard Hoses, Renew

053-B

STEERING SYSTEM

RAM BLOCK TO STBD

RAM FITTING 104 MM

OEM

HM226

N/A

053-C

RAM BLOCK TO CEN

AFT RAM FITTING 435

053-D

RAM BLOCK TO PORT

RAM FITTING 335 MM

Question: Are these special hoses still contractor supplied or GFE?

Answer: THESE HOSES ARE CONTRACTOR SUPPLIED

Question 18: WORK ITEM 27: Rudder Assembly; Remove, Inspect and Reinstall

Paragraphs: 3.3.3, 3.4.1, 3.4.1.1, 3.4.1.2, 3.4.1.4, 3.4.1.5, 3.1.4.6, 3.4.1.7, 3.4.2. 3.5, 3.6, and 3.6.1:

Question: All of these paragraphs are related or mostly related to the 52MLB’s contracts not the 47MLB’s contracts, I have seen this in other contracts, it is just a cut and paste issue, the D-26 item in 47218’s 70Z08018QP3000800 contract has the correct information, mostly, but we know what little things to ignore, like lifting ring. Are we doing both P&S sides as well?

Answer: WI 27 Updated in Rev-1. INTENT 1.1 states PORT and STBD.

Question 19: WORK ITEM 30: Interior Hull Insulation, Renew

1.1 Intent. This work item describes the requirements for the Contractor to renew the Interior

Hull Insulation as directed by the COTR.

TABLE 1- HULL INSULATION

Renew Engine Room Insulation Engine Room: Renew all insulation in ENG Room to

Question: Are we renewing the complete engine room, or just what is directed by the COTR?

ANSWER: ALL INSULATION in the ENG needs to be renewed.

Question 20: WORK ITEM 30: Interior Hull Insulation, Renew

TABLE 1- HULL INSULATION

Renew Engine Room Insulation Engine Room: Renew all insulation in ENG Room to

Question: Can we reuse the tiles, on BLKHD 5, if they are in good condition?

ANSWER: YES the tiles can be re-used if they are in good condition.

Question 21: WORK ITEM 31: Bilge Preservation, Auxiliary Space

TABLE 1 - PAINT SCHEDULE 47 MLB

INTERIOR

SURFACES TO BE

SURFACE PREPARATION

COATING SYSTEM

DFT

(MILS

COLOR FED STD

Auxiliary Space

Bilge (FR8-10) outboard to the longitudinal girders.

POWER TOOL CLEANING

PER SSPC-SP3 SO AS TO

ACHIEVE A 1.5-2.0 MIL ANCHOR

PROFILE

1) High Build Epoxy

2) High Build Epoxy

5.0-6.0

5.0-6.0

Light Gray

#26373

Light Gray

3.4 In-process quality control measures. The Contractor shall abide by all the safety, preservation, and quality control requirements specified in SFLC Std Spec 0000, paragraph

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

Question: The SSPC-SP3 surface prep called out is for painted steel surfaces, not aluminum, this should be a SSPC-SP11, like one’s we have completed on all of our other previous contracts. This is not a sand blasted surface and has not been a “critical-coated surfaces” in the past as well; this should not require a Nace inspector.

Are we to use the SSPC-SP11 profile, and is a Nace inspector really needed?

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

QUESTION 22: Main Diesel Engines

Under 1.1 the description states preserving the Port and Stbd engine mounts, however there is no mention of it within the spec. Is this service expected or will it be CFR work only?

ANSWER: CFR Work only.

End of Amendment A00001