0118_B_7-105-0-JJ_TANK_TOP_REPAIR_ARCTICROH2020.docx

USNS ARCTIC

AOE 8

HULL, STRUCTURE N32205-19-R-6012

21 OCTOBER, 2019

ITEM NO. 118 CATEGORY “B” MSC/N756/JEBSK

7-105-0-JJ TANK TOP REPAIR

1.0 ABSTRACT:

1.1 This item describes the requirement to insert four areas of the 7-105-0-JJ tank top.

2.0 REFERENCES:

2.1 ABS Rules for Building and Classing Steel Vessels, Part 7 (Contractor Obtain).

2.2 MSC Drawing No. 085-8385180; Arctic, General Arrangement Plan

2.3 NAVSEA Drawing No. 141-6362169, Assembly 1st Platform

2.4 NAVSEA Drawing No. 501-6359953 – AMR Arrangement

2.5 NAVSEA Drawing No. 801-6360543, Scantling Drawing Fr 35 – Fr 205 01 Lvl and Below

2.6 NAVSEA Drawing No. 180-6362478; FDN Drawing Fr 105 to 165, First Plat

2.7 NAVSEA Drawing No. 500-6361985; Comp Arrg, A2-188, Fr105-165, First Plat, Center

2.8 Arctic ABS Outstanding Repair # 626

3.0 ITEM LOCATION/DESCRIPTION:

3.1 Location: AMR (4-105-0-E)

4.0 GOVERNMENT FURNISHED EQUIPMENT/MATERIAL/SERVICES: None

5.0 NOTES:

5.1 The contractor and all subcontractors regardless of tier shall consult the General Technical Requirements (GTR) to determine applicability to this work item. In performance of this work item, the contractor and all subcontractors regardless of tier must comply with the requirements of all applicable GTRs including but not limited to GTRs 1 through 7.

5.2 The contractor and all subcontractors regardless of tier are advised to review ALL other work items under this contract, to determine their effect on the work required under this work item. Many of the definitions relating to performance of this work item are found in Work Item 001.

6.0 QUALITY ASSURANCE REQUIREMENTS: None Additional

7.0 STATEMENT OF WORK REQUIRED:

7.1 Clean and gas free requirements for the 7-105-0-JJ Cargo JP5 tank are covered by Work Item 021, Clean and Gas Free Tanks.

7.2 Mark and tag all deck plates in the AMR lower level (not the AMR Pump Room). Remove all deck plates and store in an area not to interfere with ongoing work. All fasteners shall be bagged and tied to each deck plate. Provide condition report for any damaged fasteners found. The four tank cleaning opening are located forward and aft of each Air Conditioning Plant, therefore minimal deck plates should be removed.

7.3 Install caution/warning tape at bottom of ladder well to notify all personnel that deck plates are missing and care should be taken while transiting space.

7.4 Stage 7-105-0-JJ tank to perform requirements of this work item. Work requirement shall be priced to stage entire tank. Initial examination of AMR bilges by contractor, ABS and MSCREP could determine that staging entire tank is not required. The government will seek a credit if it is determined entire tank staging is not required.

7.5 Accomplish steel bilge plating replacement; also the tank top for 7-105-0-FF, as indicated by readings obtained in Paragraph 7.1 and determined by the MSCREP and attending ABS Surveyor using References 2.3 and 2.7 as guidance

7.5.1 For bidding purposes, the contractor shall estimate that 16 Sqft of steel replacement.(4 sq ft per location)

7.5.2 Provide all labor and material to accomplish work under Paragraph 7.7

a. All steel shall be ABS certified.

b. ABS Surveyor to review material certification prior to steel installation.

c. ABS inspection required of all aspects of installation and materials used. ABS shall witness fit-up prior to root pass and inspect back gouge prior to finish welding section of new plate.

d. Remove piping interferences as required to accomplish bilge plate renewal. Piping sections removed shall be fitted with new gasket material for re-assembly.

e. Perform SSPC-SP-10, Blast to Near White Metal all new steel, minimum surface profile following blast shall be 2-4 mil.

f. Prep, prime, and paint new sections using PPG Marine Coating System. Three full and one stripe coat of epoxy shall be applied. Paint Rep to witness processes.

g. Target, template, fit, weld, and install new sections per References in 2.0 and ABS rules.

h. Back gouge, NDT Dye penetrate test, and re-weld

i. Accomplish integrity test; air or other per the requirements of the attending ABS Surveyor

j. Prep, prime, and paint disturbed areas post hot Work (includes opposite/adjacent sides).

7.6 Small areas of substantial or severe corrosion may be repaired by clad welding upon approval of ABS surveyor. Where an area is approved for clad welding it will be the subject to a change order.

7.7 Paint all disturbed surfaces to match surrounding areas.

7.8 Remove all staging.

7.9 Clean and close requirements for the tank are provided in work item 021.

8.0 GENERAL REQUIREMENTS: None Additional

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