0503_A_REPLACE_100_FT_OF_PIPING_REV_ARCTIC_1.doc

USNS ARCTIC

(T-AOE 8)

MACHINERY, AUXILIARY

N32205-18-R-4256 28 September 2016

ITEM NO. 503

CATEGORY “A”

MSC/N756/JEB

REPLACE 100 FEET OF PIPING

1.0 ABSTRACT:

1.1. This item describes the replacement of up to one hundred feet of piping, in various locations throughout the ship.

2.0 REFERENCES:

2.1. NAVSEA Drawing 521-6360577; Sea Water Flushing System Diagram.

2.2. NAVSEA Drawing 256-6362969; Sea Water Cooling System Diagram.

2.3. NAVSEA Drawing 521-6360554; Firemain System Diagram.

3.0 ITEM LOCATION/DESCRIPTION: Various locations.

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 their effect on the work items in this work package, which may be effected by the requirements of this item.

5.2. The contractor and all subcontractors, regardless of tier, are advised to review the other Work Items under this contract to determine their effect on the work required under this Work Item. Many of the definitions relating to the 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. Removals:

7.1.1. With the assistance of Ship’s Force Lock Out the affected piping.

7.1.2. Thoroughly drain and dispose of the residual liquids in accordance with the local, state and federal regulations.

7.1.3. Clean each area, gas free, and maintain work site Safe for Workers, Safe for Hot Work for duration of work.

7.1.4. Piping may be below the deck plates or up to eight feet above the deck.

7.1.5. Temporarily remove interferences required to facilitate this repair. Open deck area shall have a safety barrier installed.

7.1.6. Replace piping indentified. References 2.1 through 2.3 are provided for guidance.

a. Contractor is to assume that ten sections of pipe, each Ten (10) feet in length will be replaced. For bidding purposes assume three sections of the piping will be 8 IPS or above and seven sections will be 6 IPS or below. All piping shall be per Mil-T-16420 - 90/10 copper nickel, class 200, seamless.

b. Contractor is to assume that each section of pipe will include installation of two (2) different fittings (elbow, flange or other fitting) and one welded sleeve. All fittings to welded 90/10 CuNi, class 200.

c. All debris and scrap shall be disposed of by the contractor.

7.2. Cover all open pipe immediately to prevent contamination from various sources.

7.2.1. The covers shall be strong, durable material to prevent rupture and shall be securely fastened to prevent them from being dislodged by normal rough handling. A full face gasket shall be in place between the pipe flange and the cover used. Loose-fitting covers (wood plugs or rags) are not satisfactory. A loose cloth, such as a canvas cover, may be used under the following circumstances:

a. The contractor should have all materials assembled to affect repair on site prior to making entry into the system.

b. The opening is under observation while uncovered.

7.3. Installations:

7.3.1. Replace removed piping section using new material of identical size and material. Contractor may pre-fabricate the replacement section of piping in shop using the removed section as a template. ABS certified welders are required for the piping repairs.

7.4. Clean the replaced section piping.

7.5. Surface shall be visually free of grease, oil, flux, scale, dirt, loose particles and any other contamination foreign to the base metal.

7.6. Tap water residues on all metals and light superficial rust on carbon steel surfaces, caused by short time exposure to the atmosphere, are permitted.

7.7. Light dust on cleaned surfaces is not objectionable, provided that the quantity and size of the particle does not adversely affect system operations.

7.8. Inspection/Test:

7.8.1. Hydrostatically test new piping to 150 percent of system working pressure.

7.9. Paint/Lagging:

7.9.1. Renew lagging where old lagging was removed.

7.9.2. Paint all new and disturbed surfaces to match surrounding surfaces.

7.10. Preparation of Drawings: None

7.11. Manufacturer's Representative: None

8.0 GENERAL REQUIREMENTS: None Additional

503-1