MERCY_FY16_0515_A_CHT_PIPING_REPAIRS.doc

USNS MERCY

AH-(19)

AUXILIARY MACHINERY SYSTEMS

N32205-15-R-5000

July 2015

CHT and Fire Main Piping Replacements (VR14-115,VR15-042,061,050)

1.0

ABSTRACT

1.1 This item describes the requirement to replace the Corroded CHT, Fire Main piping and gray water piping configuration change.

2.0 REFERENCES:

2.1 NAVSEA DWG 505-4793675, Diagram Sewage System

2.2 NAVSEA DWG 505-4793206, Sewage System Dispering Area 3 & 6

2.3 NAVSEA DWG 505-4793209, Sewage System Dispering Area 1 & 2

2.4 Enclosure: Fig. set 1,2,3 and 4.

3.0

ITEM LOCATION/DESCRIPTION

3.1 Location/Quantity

3.1.1 6-33-0 Service Area No. 1

3.1.2 6-42-0 Service Area No. 2

3.1.3 6-51-0 Service Area No. 3

3.1.4 6-69-0 Service Area no. 5

3.1.5 6-87-0 Pump room

3.2 Item Description/Manufacturer's Data:

3.2.1 CHT Piping is to be Steel Sch 80 Pipe.

3.2.2 Fire main piping is to be 90/10 CUNI Pipe and fittings.

3.2.3 Gray Water piping to be Steel sch 80 pipe.

4.0 GOVERNMENT FURNISHED EQUIPMENT/MATERIAL/SERVICES/INFO: NONE

5.0 NOTES:

5.1 The contractor and all subcontractors, regardless of tier, must consult the General Technical Requirements 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 1-7, 21,22,25,26 and 29.

5.2 The contractor and all subcontractors, regardless of tier, are advised to review other work items under this contract to determine their effect on the work required under this work item and coordinate with work items 101, 102.

6.0 QUALITY ASSURANCE REQUIREMENTS:

6.1 The requirements of this Work Item shall be accomplished to the satisfaction of the MSCREP.

6.2 The requirements of this Work Item shall be accomplished in accordance with current Regulatory Body rules and regulations.

7.0

STATEMENT OF WORK REQUIRED

7.1 Arrangement/Outfitting:

7.1.1 Provide and maintain temporary lighting and ventilation required to accomplish all requirements of this Work Item. Remove the temporary lighting and ventilation when all requirements of this Work Item are complete.

7.2 Mechanical/Fluid:

7.2.1 Reroute 3” gray water piping to diverter manifold as shown in Fig. set 1, in service area no. 1. The pipe run is in the overhead.

Bill of Material:

4ea. 3" IPS socket weld flanges commercial bolt hole pattern.

1ea. 3" IPS bronze with monel trim commercial bolt hole pattern rising stem gate valve.

1ea. 3" IPS bronze with monel trip commercial bolt hole pattern swing check valve.

50' 3" IPS schedule 80 steel pipe.

1ea. 3" IPS schedule 80 butt weld y lateral.

1ea. weld a let to join 3" piping to 6" sewage header.

7.2.2 Replace saddle style joints as shown in fig. set 2, that serve to suction for ADG SW pump 1,2,3 and firemain relief with a 10" x 10" x 6" run tee in order to repair leaks. Replace silver braze flanges with socket weld CUNI.

4ea. 10" x 10" x 6" 90/10 Cuni butt weld tees

3ea. 6" socket weld 150# class 90/10 Cuni flanges

6' of 10" IPS 90/10 Cuni pipe

6' of 6" IPS 90/10 Cuni pipe

3ea. 6" IPS Lugged butterfly valves for salt water service

New 316L Hardware to replace existing

Gaskets

7.2.3 Replace existing wasted Fire main piping with CCUNI 90/10 piping as shown in Fig. set 3.

4' of 4" IPS 90/10 Cuni Piping, 1ea. 4" socket weld 90/10 flange 150 # class commercial bolt hole pattern.

90/10 wedding band for 4" pipe.

1ea. 8" ips long radius 90/10 Cuni elbow

2ea. 8" 150# 90/10 socket weld flanges, comm bolt hole pattern

6' 8" ips 90/10 pipe

1ea. 8x6x8 Cuni tee butt weld

1ea 8 x 6 90/10 concentric bell reducer.

1ea 8" 90/10 butt weld 45 deg elbow

1ea 6" 90/10 butt weld 45 deg elbow

1ea 6" long radius schedule 80 steel elbow

1ea 6" socket weld 250# class steel flange commercial bolt hole pattern

2ea. 6" 150# 90/10 socket weld flanges, comm bolt hole pat.

1ea. 6" lugged butterfly for salt water service

1ea. 6" rising stem gate valve bronze with monel trim com bolt hole pat

1ea. 8" rising stem gate valve bronze with monel trim comm bolt hole pattern

90/10 weld a let for supply to pucker from 8" elbow

90/10 weld a let from supply to pucker from 6" piping

7.2.4 Replace leaking sections of CHT piping in the overhead of Service areas 1,2,3 and 5 as shown in fig. set 4.

4" ips schedule 80 steel pipe - 300 feet

2" ips schedule 80 steel pipe - 15 feet

4ea. 4" ips butt weld 45 deg elbows

6 ea 4" ips 90 deg long radius elbow with 2" ips clean out.

1ea. 2" ips long radius 90 deg elbow

20ea. 4" ips steel flanges bolt hole pattern to match check valve

10 ea. long radius 4" sch 80 butt weld elbows

6ea. lateral 4" ips butt weld sch 80 tee

50 feet 6" IPS schedule 80 steel pipe

10ea. 6" ips flanges to to fit 3 way valves 12 bolt hole pattern

4ea. 4" tee sch 80 gal butt weld

4ea 6" ips steel sch 80 90 deg elbows

4ea. NSN: 01-033-7217 3 way valves 7.3 Inspection/Test

7.3.1 Accomplish a Hydrostatic test of the replace piping 50 psi test pressure FOR CHT and Gray Water piping, 200 psi Fire main for 10 Minutes using clean fresh water. The test shall be accomplished to the satisfaction of the MSCREP and ABS Inspectors. Allowable Leakage: None

Isolate the piping from all equipment to prevent damage while accomplishing the Hydrostatic Test.

7.4 Painting

7.4.1 Accomplish Surface Preparation, Clean, Prime and Paint all new and disturbed surfaces in way of the requirements of this work item to match surrounding areas.

8.0 GENERAL REQUIREMENTS: None

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_1499227651.doc

USNS Mercy

(T-AH 19)

Auxiliary Machinery Systems

N32205-15-R-5000

ITEM NO. 508

CATEGORY "A"

21 May 2015

EDG Maintenance

HLK

1. ABSTRACT

1.1. This item describes maintenance for the Emergency Diesel Generator (EDG).

2. REFERENCES/ENCLOSURES:

2.1. Technical Manual T6270-AG-MMC-010, “Operating Manual For Diesel Engines”

2.2. Technical Manual T6270-AG-MMC-030, “Spare Parts Catalogue For Diesel Engines”

3. ITEM LOCATION/QUANTITY/DESCRIPTION

3.1. Location: EDG Room, 01-129-0

Radiator Room, 03-132-0

3.2. Description/Quantity:

3.2.1. Engine Mfr: MAN

Type: V20/27

Speed: 900 rpm

Power: 2172 hp

4. GOVERNMENT FURNISHED MATERIAL: None

5. NOTES: None

6. QUALITY ASSURANCE REQUIREMENTS:

6.1. All repairs are to be accomplished in accordance with ABS Rules. All material is to meet regulatory body requirements.

7. STATEMENT OF WORK REQUIRED

7.1. Provide OEM tech rep to work with ship’s force to adjust valve lash and perform hourly maintenance. Use Reference 2.1 and 2.2 for guidance.

7.1.1. Manually clean EDG, removing dirt, grease, fuel, and lube oil

7.1.2. Replace all lube oil, fuel oil, and air filters.

7.1.3. Replace all drive belts.

7.1.4. Replace all hoses to include, jacket water, lube oil, fuel oil, and start air. Template off existing hoses.

7.1.4.1. Replace all hardware associated with hoses. New hardware is to be 316L SS or Nicu.

7.1.4.2. Replace all gaskets associated with hoses. New gaskets are to be manufactured by Garlock.

7.1.4.3. Replace all hose clamps associated with hoses. New hose clamps are to be 316L SS.

7.1.4.4. Hydro all hoses prior to install. Tag all Hoses with hydro test information to include date and pressure.

7.1.5. Service the Cooling water system. Use Reference 2.1 for guidance

7.1.5.1. Drain and flush radiator and heat exchanger. Clean as necessary

7.1.5.2. Refill Jacket Water using distilled or de-ionized water. Add proper levels of growth inhibitor and antifreeze to cooling system.

7.1.5.3. Replace water temperature regulator and associated seals and gaskets.

7.1.6. Test run the EDG and adjust as necessary.

7.2. Provide three (3) hard copies and one (1) electrical copy of the following to the Chief Engineer and MSCREP:

A) A Hose list that is to include at the minimum: hose size, hose length, hose material, fitting type, fitting material, and fluid, for each hose.

B) A report from tech rep of work done, test run results, and recommendations.

8.0 GENERAL REQUIREMENTS: None Additional

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