SOW USNS LARAMIE .pdf

USNS LARAMIE

(T-AO 203)

MACHINERY, AUXILIARY SYSTEMS N32205-17-R-XXXX

3 November 2021

ITEM NO. 501 Category "A" MSC/N751/MZ

REFURBISH HP AIR FLASKS

501-1

1.0 ABSTRACT:

1.1. This item describes performing weld build up to HP

air flasks

2.0 REFERENCES:

2.1. 500-6580222; T-AO 187 Class (193 Series) Fleet Oiler

Pressure Vessels for Air Flasks & Air Receivers

2.2. 500-6580223; LIST OF MATERIAL, PRESSURE VESSEL (MN

ENG STARTING AIR RCVR, SS AIR RCVR, WSTL AIR RCVR & RSV & WKG

AIR FLASKS)

2.3. USNS LARAMIE Thickness Report – High Pressure Air

Flask; Report Number 113-07-16-21 dated 14 August 2021

2.4. ASME Boiler and Pressure Vessel Code; section IX, Welding Brazing and Fusing Qualifications

2.5. ASME Boiler and Pressure Vessel Code; section VIII, Rules for Construction of Pressure Vessels

3.0 ITEM LOCATION/DESCRIPTION:

3.1. Location/Quantity:

3.1.1. Location: Various

3.1.2. Quantity: 8 air flasks.

4.0 GOVERNMENT FURNISHED EQUIPMENT/MATERIAL/SERVICES:

4.1. Government Furnished Equipment (GFE): None

4.2. Government Furnished Material (GFM):

4.2.1. Eight high pressure air flasks

Station Bottle Serial Number

3 3 C8-275-2367-13

4 1 C8-275-2367-15

7 1 C8-275-2367-23

7 2 C8-275-2367-24

MACHINERY, AUXILIARY SYSTEMS N32205-17-R-XXXX

3 November 2021

ITEM NO. 501 Category "A" MSC/N751/MZ

REFURBISH HP AIR FLASKS

501-2

7 3 C8-275-2367-25

7 4 C8-275-2367-26

2 1 C8-275-2367-7

1 1 C8-275-2367-1

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.

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.

6.0 QUALITY ASSURANCE REQUIREMENTS: None additional

7.0 STATEMENT OF WORK REQUIRED:

7.1. Tag-Out all required systems and equipment. Drain

and dispose of any liquid in accordance with all federal, state, and local regulations.

7.2. Receive material identified in paragraph 4.2

7.3. Restore thickness of metal for air flask shell and

head using references 2.1 through 2.5 and the below information as guidance.

7.3.1. Metal for air flask shell is to be restored

to a minimum of 1.676 inches but not more than 1.9375 inches

7.3.2. Metal for air flask head is to be restored to

a minimum of 1.533 inches but not more than 1.625 inches.

MACHINERY, AUXILIARY SYSTEMS N32205-17-R-XXXX

3 November 2021

ITEM NO. 501 Category "A" MSC/N751/MZ

REFURBISH HP AIR FLASKS

501-3

Station Bottle Serial Number

Location requiring correction

Approximate area

(sq inches)

3 3 C8-275-2367-13 13B, 13C 152

4 1 C8-275-2367-15 5A 76

7 1 C8-275-2367-23 12C, 12D, 12F 228

7 2 C8-275-2367-24 12J, 17A, 17C 228

7 3 C8-275-2367-25 13A, 13B, 13C, 13H, 13I, 13K

7 4 C8-275-2367-26 13g, 13H, 13I, 13J, 13K, 18F

2 1 C8-275-2367-7 2E, 19A, 19C 228

1 1 C8-275-2367-1 1H, 2G, 2H, 4F, 7G, 15E, 18F

7.3.3. Location requiring correction in table above

provides location as identified in reference 2.3

7.4. Replace drain connection and outlet connection of

each air flask with new using references 2.1 and 2.2 for details of material requirements.

7.5. Paint/Lagging/Markings:

7.5.1. Renew lagging where old lagging was removed.

Paint all new and disturbed surfaces to match surrounding surfaces.

7.5.2. Install name plates, notices, and markings

for all new and modified systems (or areas)

7.6. Inspection/Test

7.6.1. Prove thickness and density of material meets

the requirements of paragraph 7.3 in all locations using magnetic particle testing (MT) and/or liquid penetrant testing

(PT) of affected areas.

7.6.2. Provide objective evidence ensuring that

there are no cracks, inclusions, porosity, spatter, and filler material is well bonded to the base metal.

MACHINERY, AUXILIARY SYSTEMS N32205-17-R-XXXX

3 November 2021

ITEM NO. 501 Category "A" MSC/N751/MZ

REFURBISH HP AIR FLASKS

501-4

7.6.3. ABS and MSCREP are to be present for any

testing.

7.7. Manufacturer's Representative: None

7.8. Preparation of Drawings: None

8.0 GENERAL REQUIREMENTS: None additional