WI 509_RevA_Tnk Dck Drain Piping Replace.docx
DOCX document 2 MB Posted
- Attached to
- USNS JOHN LENTHALL (T-AO 189) FY 21 MTA
- Solicitation number
- N3220520R4009
About this file
This document outlines the requirements for a mid-term availability contract to replace drain piping aboard the USNS John Lenthall. The contractor will remove approximately 282 linear feet of existing 4-inch steel piping and install new piping, fittings, valves, and hangers to replace drain lines from several station tubs on the starboard side of the main deck to the tank deck sludge collection tank. The contractor must submit sketches of piping to be removed for approval, fabricate and install the new piping per specifications, conduct pressure testing and inspection, and paint all new and disturbed surfaces to match existing. The solicitation was issued by the Department of the Navy Military Sealift Command under number N3220520R4009 to support maintenance work aboard the USNS John Lenthall during its FY21 mid-term availability period.
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Text version
USNS LENTHALL
( TAO 189 )
| AUXILIARY MACHINERY |
| CONTRACT NO. N32205-20-R-4009 |
| ITEM NO. 0509 |
| CATEGORY "A" |
| 2020-10-19 |
| Tank Deck Drain Piping Replacement_REVA |
| Coleman Ray |
1.0 ABSTRACT
1.1 Remove and replace starboard side station tub drain piping for Stations 1, 1A, 3, 5A, 7 and 7A to the tank deck sludge collection tank.
2.0 REFERENCES/ENCLOSURES
2.1 References:
2.1.1 NAVSEA 500-6580660, Piping Material Schedule
2.1.2 ASI DWG. No PS -06-WJ-01, ASI Standard Joint Prep and Weld Details.
2.2 Enclosures:
2.2.1 Picture of Drains from Station Tubs.
3.0 ITEM LOCATION/DESCRIPTION/QUANTITY
3.1 Location/Quantity:
3.1.1 Location: Tank Deck (Main Deck) Kingpost Sumps draining from the 01 level down to the main deck Starboard Side.
3.1.2 Quantity/Description:
3.1.2.1 Approximately Two hundred eighty two (282) linier feet of existing 4" schedule 40 steel piping. (staging required)
3.1.2.2 Approximately Sixty (60) linear feet of 1 1/2” sch 80 steel piping.
3.1.2.3 Forty six (46) 4” eight bolt socket weld flanges.
3.1.2.4 Forty (40) existing piping hangers with stainless steel hardware and channel rubber.
3.1.2.5 Sixteen (16) 4” Welded Couplings
3.1.2.6 Twelve (12) 4” 45 degree elbows
3.1.2.7 Twelve (12) 4” 90 degree elbows.
3.1.2.8 Fifteen (15) 1 ½” 90 degree elbows.
3.1.2.9 Eight (8) 4” ball Valves.
3.1.2.10 Five (5) 1 ½” ball valves.
3.1.2.11 Three (3) linear feet of 6” sch 40 piping
3.1.2.12 Five (5) square feet of ½” plate.
4.0 GOVERNMENT FURNISHED EQUIPMENT/MATERIAL/SERVICES
4.1 None.
5.0 NOTES
5.1 None
6.0 QUALITY ASSURANCE REQUIREMENTS
6.1 All work shall be performed to the satisfaction of the ABS, USCG, MSC Port Engineer and the Chief Engineer.
6.2 All piping and flanges shall be installed in accordance with applicable rules and regulations of ABS and USCG.
7.0 STATEMENT OF WORK REQUIRED
7.1 Prior to making any removal, Contractor shall submit to MSCREP a sketch of piping to be removed to include pipe sizes and lengths of pipe to be renewed for approval
7.2 Remove existing drain piping lines and hangers identified in 3.1.2.
7.3 Crop and renew drain bowl in each station tub drain on the stbd side (5 stations)
7.4 All hangers shall be mechanically cleaned/ground smooth to ensure proper feathering of paint.
7.5 Fabricate new piping using existing as a template and utilizing 45 degree and 90 degree elbows and welded couplings where previously installed. Install new piping in place of piping removed. Install new hangers and brackets with new channel rubber complete 360 degrees around the pipe where hanger installed.
7.6 Install new butterfly valves where removed.
7.7 Provide and weld all piping and fittings identified in paragraph 3.1.2 in accordance with ABS and USCG rules and regulations.
7.7.1 Hydro test all welds to 100 psi and dye penetrate test all welds.
7.7.2 Ensure all piping is targeted correctly.
7.8 Utilizing an inflatable pipe plug perform a static drain test to ensure piping is not leaking.
7.9 All fasteners shall be coated with "Anti-Seize" compound prior to installation.
7.10 Modify existing pipe hangers brackets to properly support new piping.
7.11 All dirt and debris shall be removed from the ship on a daily basis and the area left clean and in good order.
7.12 Mechanically clean, prime, and paint all new and disturbed areas to match adjacent surfaces. All newly installed piping, brackets and couplings shall be painted to match existing.
8.0 GENERAL REQUIREMENTS
8.1 None.
Enclosure 2.2.1 Picture of Drains from Station Tubs.
0509 - 1 image1.jpeg
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