0108_A_Double Bottom Tank Top Steel Replacement.doc

USNS LENTHALL

(TAO 189)

1.0 ABSTRACT

1.1 The Contractor shall provide all labor and material to accomplish the steel renewal of designated areas of the pump room bilge between frames 5-34-0 thru 5-38-0 that are at minimal wastage allowances as identified in Windward marines report dated 04/13/2020 Pages 245-248.

2.0 REFERENCES/ENCLOSURES

2.1. References:

2.1.1. NAVSEA DWG: 113-5904079 CL INNER UNIT 510 FR. 36-40

2.1.2. NAVSEA DWG: 113-5904087 CL INNER BOTTOM UNIT 520 FR. 33-36

2.2. Enclosures:

2.2.1 WIND WARD REPORT pg. 248 WITH LOCATIONS IDENTIFIED BY NUMBER

3.0 ITEM LOCATION/DESCRIPTION

3.1. Location:

3.1.1. PUMP Room DBL 5-33-0 FR. 35-38 Various

3.2. Description/ Quantity:

3.2.1. Pump Room DBL Room Frames 35 to 38 Port and STBD C/L

4.0 GOVERNMENT FURNISHED EQUIPMENT/MATERIAL/SERVICES

4.1. Government Furnished Equipment (GFE): None.

5.0 NOTES:

5.1 All Material shall be ABS Grade in accordance with Reference Drawings

5.2 All material approval documentation shall be submitted to the Port Engineer by a CFR.

6.0 QUALITY ASSURANCE REQUIREMENTS

6.1. All work performed shall be done in accordance with all ABS and USCG Rules and Regulations.

7.0 STATEMENT OF WORK REQUIRED

7.1. Provide all labor, material, rigging and services required to clean and certify gas free “Safe for Men” and “Safe for Hot Work” the surrounding spaces required to accomplish the repairs listed in this specification. The known locations of the repairs are listed in Paragraph 3.1.2, spaces that are immediately adjacent/adjoining to and under are believed to require this certification based on the required repairs. The Government does not guarantee this list to be all inclusive, contractor shall gas free all spaces “Safe for Men” and “Safe for Hot Work” requiring such certification based on their own analysis.

7.1.1. Contractor should note that some of the areas have habitability and work spaces adjacent/adjoining to and immediately under, which will require access to and removal of interferences to complete these repairs. Contractor should determine and include in there bid the amount of removals and access required. In some cases the work will directly impact or pass into/through the subject spaces.

7.2. Provide all labor, material, staging, rigging and services required to remove, protect, and reinstall all interferences that may be impacted by the repair from the surrounding spaces. The surrounding and adjoining spaces that may be effected are shown in the Booklet of General Drawings reference 2.1.2 or seen during the Bidders Ship Check.

7.2.1. Some of the interferences which could require removal and or protection from hotwork are (but not limited to):

a. Piping

b. Valves

c. False Decks

d. Hand Rails

e. Limit Torque Valves

f. Lights

g. Ladders

7.2.2. Ducting, insulation/lagging in overhead/bulkheads, bulkhead and ceiling panels, cableways, lighting, pipe hangers, piping, machinery, valves, controllers/electrical devices, etc…

7.2.3. The contractor shall provide the services of a NFPA Marine chemist to Gas Free all Areas Safe FOR HOT WORK where Hot work is to be performed.

7.2.4. The contractor shall remove Interference's such as valves, limit torques, Piping. electrical cables, lights, false deck, and foundations to access repairs.

7.2.5. Pipes shall be removed at take down joints where possible. when reinstalled they shall be reinstalled using new hardware and gaskets. The hardware at take down joints shall have to be destructively removed.

7.2.6. When removing pipes residual saltwater, fuel, oily waste may be present, the contractors shall be responsible for removing this liquid from the bilge.

7.2.7. The contractor shall make cuts at existing Butt and seam welds where practical. The contractor shall round corners to keep from creating hard spots.

7.2.8. Make access cut in existing Decks and bulkheads to move in steel plate and structure as need to make repairs. Submit sketches of all access cuts to MSCREP and ABS for review.

7.2.9. The contractor shall support decks and structure to keep deformation from happening during repairs/ renewal.

7.2.10. The contractor shall wrap using plastic, sheet metal, and Fire cloth to protect ship Equipment.

7.2.11. Contractor shall provide and maintain ventilation for all the work in this Item..

7.3.The Contractor shall renew plate at the following locations see ENCL: 2.2.1 for Approx. locations by number.

7.3.1 NR. 1 Crop and renew Approx. 18 IN. X 18 IN. X .53 IN. ABS Grade AH-32 or Better Area of Deteriorated steel plating Location: Approx. 25 FT. INBD from Portside LG. BlkHD. and 2 FT AFT of the 37.5 Bulk head.

7.3.2 NR. 2 Crop and renew Approx. 4 FT. X 4 FT X .53 IN. ABS Grade AH-32 or Better Area of Deteriorated steel plating, Location is under MTR. RM. Approx. 6 FT. FWD of FR. 38 and 8 FT. INBD. from Port side Longitudinal BLKHD.

7.3.3 NR. 3 Crop and renew approx 2 FT. X 2 FT. X .53 IN. ABS Grade AH-32 or better Steel Plate, location is under MTR. RM. NR. 2 Approx. 2 FT fwd of Frame 38 Gusset that supports the Port side Longitudinal BlkHD., 6" from Port Longitudinal Blkhd.

7.3.4 NR.4 Crop and renew approx. 2 FT. X 2 FT. X .53 IN. ABS Grade AH-32 or better Steel Plate , Location is Approx. 7 FT.-7 IN. INBD. of Port Longitudinal BLKHD. and APPROX. 12FT. aft of MTR. RM NR.1 Transverse BLKHD at FR.35.5.

7.3.5NR.5 Crop and renew approx. 8 FT. X 4 FT. X .53 IN. ABS Grade AH-32 or better Steel Plate, Location is Approx. 11 FT. INBD. of Port Longitudinal BLKHD. and APPROX. 13FT. aft of MTR. RM NR.1 Transverse BLKHD at FR.35.5.

7.3.6 NR.6 Crop and renew approx. 4 FT. X 4 FT., X .53 IN. ABS Grade AH-32 or better Steel Plate Location is Approx. 8 FT. INBD. of Port Longitudinal BLKHD. and APPROX. 9 FT. aft of MTR. RM NR.1 Transverse BLKHD at FR.35.5.

7.3.7NR.7 Crop and renew approx. 8 FT. X 4 FT. X .53 IN. ABS Grade AH-32 or better Steel Plate, Location is Approx. 16 FT. INBD. of Port Longitudinal BLKHD. and APPROX. 13FT. aft of MTR. RM NR.1 Transverse BLKHD at FR.35.5.

7.3.8 NR.8 Crop and renew approx. 8 FT. X 4 FT. X .53 IN. ABS Grade AH-32 or better Steel Plate, Location is Approx. 16 FT. INBD. of Port Longitudinal BLKHD. and APPROX. 19 FT. aft of MTR. RM NR.1 Transverse BLKHD at FR.35.5.

7.3.9 NR.9 Crop and renew approx 4 FT X 4 FT X .53 IN. OF ABS Grade AH-32 or better Steel Plate, location is under MTR. RM. NR. 1 Approx 2 FT FWD of frame 35 and Approx. 10 FT STBD of CL.

7.3.10 NR.10 Crop and renew Approx 8 FT X 10 FT X.53 IN. OF ABS Grade AH-32 or Better Deck PLT. Steel, location is under Mtr. RM. NR.1 extends from FR.35 Approx. 8 FT STBD from C/L and Extends to 18 " Valve SB-PV 004.

7.3.11 NR.11 Crop and renew approx. 4 FT. X 4 FT. X.53 IN. OF ABS Grade AH-32 or Better Steel area of deck plating to SP-11, Location is Center line and APPROX. 11 FT. aft of MTR. RM NR.1 Transverse BLKHD at FR.35.5.

7.3.12 NR.12 Crop and renew approx. 4 FT. X 4 FT X.53 IN. OF ABS Grade AH-32 or Better Steel area of deck plating, location is Approx. 6 Ft AFT of Valve SB-PV 004 and Approx. 25 FT INBD of STBD Longitudinal BLKHD.

7.3.13 NR.13 Crop and renew Approx. 2 FT. X 2 FT. X.53 IN. OF ABS Grade AH-32 or Better Steel area of deck plating, Location is Approx. 9 FT Aft of SP-PV 004 and Approx. 17 FT. INBD. of STBD Longitudinal BLKHD.

7.3.14 NR.14 Crop and renew Approx. 2 FT. X 2 FT. X.53 IN. OF ABS Grade AH-32 or Better Steel area of deck plating, Location is Approx. 9 FT. Aft of SP-PV 004 and approx. 19 FT INBD. OF STBD Longitudinal BLKHD.

7.3.15 NR.15 Crop and renew Approx. 2 FT. X 2 FT X.53 IN. OF ABS Grade AH-32 or Better Steel area of Deck Plating, Location is Approx. 11 FT Aft of SB-PV-004 and Approx 12 FT. Off STBD side BLKHD.

7.3.16 NR. 16 Crop and renew Approx. 2 FT X 2 FT X.53 IN. OF ABS Grade AH-32 or Better Steel area of deck plating, Location is Approx. 30" AFT of MTR. RM NR. 1 transverse BLKHD 35.5 and 9 FT. INBD of STBD Side Longitudinal BLKHD.

7.3.17 NR.17 Crop and renew Approx. 10 FT. X 8 FT. X.53 IN. OF ABS Grade AH-32 or Better Steel area of deck plating, Location is around SBPV-005.

7.4. All work shall be accomplished in accordance with all ABS and USCG Rules and Regulations.

7.5. All inserts are to have be inspected as follows in the presence of ABS, USCG, and MSC Represenative:

a) Fit-up

b) Final Weld

d) NDT

e) Vacuum Box

7.6 After completion of steel repairs, air test to the double bottom ballast tank to prove airtight boundary in the presence of the MSCREP and the attending ABS/ USCG surveyor.

7.7 ALL area to be painted shall have a surface prep inspection in the presence of ABS, USCG, PPG. REP, and the MSCREP.

7.8All Interferences are to be re-installed as Original.

7.9 All piping and valves to be replaced using new Gaskets and hardware.

7.10 Surface prep and paint all new and disturbed areas resulting from the repairs

7.10.1All new steel repairs as well as all disturbed areas resulting from the repairs (to include all surrounding/adjoining spaces) shall be prepped and painted to the satisfaction of the Government provided Paint Manufacturer Representative and MSC Rep.

7.10.2 All new steel shall be Sand blast to "near white metal" per SSPC-SP 10 Condition, using reference 2.1.3 as guidance and coated with Ameron preconstruction primer prior to being brought to the ship for installation. Bare metal areas shall be feathered-in.

7.10.2.1All disturbed areas/surfaces resulting from the repairs shall be prepared to a SSPC-SP-11 condition using reference 2.1.3 as guidance. Bare metal areas shall be feathered-in.

7.10.3 Ensure the following conditions are met prior to painting:

7.10.3.1 Surfaces shall be clean, dry and free of oil, grease or residue from cleaning operations. Surface appearance shall meet the definition of SSPC-SP10 and SSPC-SP-11 condition (as applicable per specification) as identified in reference 2.1.3.

7.10.3.2 Air and metal surface temperatures shall be within the range published by the paint manufacturer.

7.10.3.3 The ambient air and metal temperatures register at least 5 degrees Fahrenheit above the dew point temperature.

7.10.3.4 7 The relative humidity is no higher than 80 percent.

7.10.3.5 No coating shall be applied at temperatures below 35 degrees Fahrenheit without prior written approval of the MSC Port Engineer.

7.10.3.6 No coating shall be applied between the hours of 1900 and 0800 without prior written approval of the MSCREP.

7.10.3.7 Areas to be painted shall be blown down with dry, oil free air prior to painting.

7.10.3.8 Prior to application of any coating, the area to be painted shall be inspected and approved by the MSC Port Engineer and the Paint Rep. This includes not only the initial coat of paint, but all subsequent coats as well.

7.10.4 Upon approval by MSC Rep, apply following paint system to tank overhead and tank top. Each coat shall be a different color that contrasts the previously applied coat.

7.10.4.1 Apply one full coat of Amercoat 240 Buff at 5-6 mils DFT.

7.10.4.2 Apply two stripe coats of Amercoat 240 Haze Gray in between full coats color to be haze gray

7.10.4.3 Apply one full coat of Amercoat 240 Off-White at 5-6 mils DFT.

7.10.4.4 Apply one full coat of Amercoat 240 Red Oxide to Tank Top areas 5-6 mils.

7.10.4.5 Apply one full coat of Amercoat 240 White to inside of tank areas 5-6 mils

7.10.5 The contractor shall prepare a paint report and submit same to the MSC Port Engineer within three (3) days of completing the coating application For any continuous are that is greater than 500 sqft. The report shall include the following data::

7.10.5.1 Date and time of application.

7.10.5.2 Surface and ambient temperatures, humidity, and dewpoint, at time of each application.

7.10.5.3 Dry film thickness readings (ten (10) per 500 sq. ft.) for each coat of paint.

7.10.5.4 Manufacturer, Product Identification No., Description, Batch Nos., Color, Application Method and Application Companies for each type of paint applied

8 GENERAL REQUIREMENTS:

8.10 None additional.

Enclosure 2.2.1

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