11.19__WI_308.5_Replace_Engine_Room_Supply_Ventilation.pdf

USS FRANK CABLE

(AS-40)

HVAC 08 February 2016 ITEM NO.308.5 Category “A” TMMG/SEDLACEK/TNG

REPLACE ENGINE ROOM SUPPLY VENTILATION

308.5-1

1.0 ABSTRACT

This item describes the requirements for replacement of deteriorated engine room supply system ventilation ductwork in support of 1S, 2S, 1SAS, and 2SAS Switchboards Upgrade.

Replacement includes removing existing ventilation supply ductwork and insulation, fabricating new stainless steel ductwork, and installing new engine room supply system ductwork and insulation.

2.0 REFERENCES

2.1 MSC Drawing 803-7081122, General Technical Requirements

(GTRs)

2.2 MSC Drawing 512-8496026, Engine Room HVAC Supply System

Duct Replacement

2.3 MSC Drawing 512-8496066, HVAC Duct Replacement, System

Installation Operation Test Procedure

2.4 Military Sealift Fleet Support Command (MSFSC) Standard

Work Item for Repetitive Repair Requirements dated: 22 March 2010, Item No. 04, ventilation System Cleaning Requirements

3.0 ITEM LOCATION/DESCRIPTION

3.1 Location/Quantity:

3.1.1 Location

a. Engine Room 5-110-0-E

3.1.2 Quantity: None

3.2 Item Description/Manufacturer’s Data

3.2.1 Bill of Material

a. Included in Reference 2.2.

b. Quantities are considered estimates. The contractor shall provide the exact quantities and additional material such as

308.5-2 miscellaneous pipe fittings, elbows, caps, valves, pipe hangers, weld material, cable hangers, cable tags, buswork, etc., which are not included in the List of Materials, in order to install a fully functional system which meets the requirements of this specification.

4.0 GOVERNMENT FURNISHED EQUIPMENT/MATERIAL/SERVICES

4.1 Government Furnished Equipment (GFE): None

4.2 Government Furnished Material (GFM): None

4.3 Government Furnished Services (GFS): None

4.4 Government Furnished Information (GFI): None

5.0 NOTES

5.1 The Contractor and all subcontractors, regardless of

tier, must 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, 22, 25, 26, 27 and 29.

5.2 The Contractor and all subcontractors, regardless of

tier, are advised to review other work items under this contract, including but not limited to Work Items 308.1 through 308.4, 308.6 and 308.7, 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.

5.3 The Contractor shall perform ship check to retrieve

accurate measurements and information before conducting work.

5.4 All welding shall be in accordance with ABS rules for

building and classing steel vessels.

308.5-3

5.5 All disturbed surfaces will be repaired utilizing

approved methods maintaining the water tight, fire tight, or smoke tight integrity of the bulkheads, decks or equipment.

5.6 All shipboard structure, hull insulation, sheathing, etc. damaged or disturbed by these modifications shall be repaired similar to the original or surrounding materials.

5.7 Minor deviations from the drawings are authorized if

appearance, function and strength are not impaired.

5.8 Submit Request for Deviation (RFD) to the MSC

Representative for approval for any areas that appearance, function and strength are impaired.

6.0 QUALITY ASSURANCE REQUIREMENTS

6.1 All work and testing shall be in accordance with the

latest SOLAS regulations, ABS Rules for Building and Classing Steel Vessels, IEEE-STD-45, USCG Requirements, and to the satisfaction of and in the presence of the ABS Surveyor (if required), Manufacturer’s Representatives (as necessary), and MSC Representative (MSCREP).

6.2 All welding requirements shall be accomplished by

certified welders and meet ABS and USCG requirements.

All welders shall be certified to perform the type of welding required and documentation of such shall be current. Fire watches shall be posted by the Contractor during hot work.

6.3 Clean and gas free affected enclosed spaces per local

procedure as approved by the ship and/or MSCREP.

7.0 STATEMENT OF WORK REQUIRED

7.1 Arrangements/Outfitting

308.5-4

7.1.1 Remove all interference items necessary to

accomplish the requirements of this Work Item.

Mark, protect and properly store all interference items removed. Reinstall interference items and prove them operational when the requirements of this Work Item are complete.

7.1.2 The Contractor shall design and make all

necessary arrangements (temporary accesses, install padeyes and lifting gear, rigging path, etc.) to safely install the HVAC modifications and auxiliary fixtures, using References 2.1 to

2.3 as guidance.

7.2 Structural: None additional

7.3 Mechanical/Fluids

7.3.1 Removals

a. Remove existing supply ductwork and associated insulation using Reference 2.2 as guidance.

b. Retain existing coamings through the 3rd Deck into the Engine Room and from the upper to lower levels of the Engine Room.

7.3.2 Installations

a. Fabricate and install supply ventilation ductwork and associated insulation using Reference 2.2 as guidance.

7.4 Electrical: None additional

7.5 Electronics: None additional

7.6 Cleanliness

7.6.1 Clean and gas free spaces as necessary in

preparation for hot work. Clean and gas free

308.5-5 affected enclosed spaces per local procedure as approved by the ship and/or MSCREP.

7.6.2 The Contractor shall clean the affected

ventilation systems using Reference 2.4 as guidance after completion of all work ensuring that no debris is present prior to starting the ventilation fans.

7.7 Preparation of Drawings/Documents:

7.7.1 Guidance Drawings - None.

7.7.2 Working Drawings - As Required.

7.7.3 Redline Drawings - None.

7.7.4 As-built Drawings

a. Contractor shall provide as-built drawings based off Reference 2.2 and the installed conditions.

b. As-built drawings shall be provided in AutoCAD 2004 and PDF (electronic format).

c. As-built drawings shall be provided to MSCREP and MSC Tech Library:

9276 3rd Ave., Bldg. LP-26

Norfolk, VA 23511

7.8 Preparation of Drawings/Documentation: None additional

7.9 Inspection/Test

7.9.1 Inspections

a. Notify the MSCREP and the Chief Engineer to inspect ventilation for cleanliness prior to final closeout and before energizing system.

7.9.2 Welding and Brazing Inspection

308.5-6

a. The Contractor and MSCREP shall visually inspect new, modified, or repaired welds in accordance with ABS requirements.

b. The Contractor and MSCREP shall inspect all hot work prior to applying paint.

7.9.3 Tests

a. A tightness test in accordance with the GTRs and ABS Steel Vessel Rules shall be performed where watertight or fire boundaries have been modified.

b. The modified HVAC system shall be inspected to ensure that there are no visible mechanical defects and that there are no audible leaks.

c. Test and balance new and modified HVAC systems using Reference 2.1, GTR No. 3 and

2.2 as guidance.

d. Upon successful completion of balancing, remove damper handles and tack weld dampers in place using Reference 2.2 as guidance.

e. Test the HVAC Supply Systems using Reference

2.3 as guidance. Document test results in Reference 2.3.

7.10 Painting

7.10.1 Paint all new and modified surfaces to match

surrounding surfaces using Reference 2.1 as guidance.

7.11 Marking

7.11.1 Fabricate and install new name plates, notices, cable tags, labels, and markings, including directional flow markings, for all new or

308.5-7 modified areas using Reference 2.1, GTR No. 29, and as noted on referenced drawings.

7.12 Manufacturer’s Representative: None additional

8.0 GENERAL REQUIREMENTS:

8.1 All areas involved in work or traversed by workmen or

equipment shall be left clean and in good order.

8.2 All waste matter resulting from this work item shall

be collected in suitable containers provided by the Contractor and shall be disposed of by the Contractor in strict compliance with current U.S. Government, state and local antipollution and public health regulations.

8.3 All required tests and inspections shall be performed

to the satisfaction of the USCG, ABS, and MSCREP as applicable.

8.4 No items shall be left for ship’s force disposal.