0101_Laramie_UT_Guaging_2016.pdf

UT GUAGING & STRUCTURAL INSPECTION

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1.0 ABSTRACT

1.1 This Item describes the requirement for an ABS recognized ESP Hull Gauging Firm to take and record ultrasonic gauging readings of tank tops, tank boundaries, various decks and bulkheads and hull plating to satisfy the requirements of the ABS Special Periodic Hull Survey #4 onboard USNS Laramie.

2.0 REFERENCE

2.1 NAVSEA Dwg No. 101-6580055, General Arrangement Outboard Profile.

2.2 NAVSEA Dwg No. 101-6581211, General Arrangement Inboard Profile.

2.3 NAVSEA Dwg No. 101-6581214, General Arrangement Double Bottom.

2.4 NAVSEA Dwg No. 101-6581216, General Arrangement Tanks and Floors, Fwd

FR 60.

2.5 NAVSEA Dwg No. 101-6580165, Scantling Sections

2.6 NAVSEA Dwg No. 101-6580820, Shell Expansion Scantlings.

2.7 NAVSEA Dwg No. 631-6580187, Paint Schedule”

2.8 ABS Rules for Building and Classing Steel Vessels, Part 7, Rule Requirements for

Survey After Construction Part 7, Chapter 3 Section 2. Tanker ESP

3.0 ITEM LOCATION/DESCRIPTION

3.1 Location

3.1.1 Throughout the vessel in areas designated by the ABS Surveyor and/or the MSC Port Engineer Surveyor in conjunction with Intermediate Hull Survey #4 Gauging and Survey Requirements.

3.2 Quantity

3.2.1 Thirty Thousand (30,000) UT readings (for estimating purposes). Readings will be taken in a variety of different locations.

4.0 GOVERNMENT FURNISHED EQUIPMENT/MATERIAL/SERVICES: None

5.0 NOTES

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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 GTR’s.

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. Many of the definitions relating to performance of this work item are found in Work Item 001.

5.3 Thickness measurements are to be carried out by a qualified company certified by the American Bureau of Shipping and under the supervision of the ABS Surveyor.

5.4 All audio gauging equipment shall be acceptable for use by the American Bureau of Shipping.

5.5 ABS Surveyor will recheck the measurements as deemed necessary to ensure acceptable accuracy.

5.6 Ships force shall be responsible for transferring water to and from tanks to ensure proper rafting levels.

5.7 Rafting support Contractor shall provide a certified marine chemist to certify each tank safe for men. Tanks shall be required to be recertified after any change in liquid levels.

5.8 Location: Craney Island Fuel Depot, Portsmouth, VA

POP: Mar 10 – Mar 20, 2016

6.0 QUALITY ASSURANCE REQUIREMENTS: None additional.

7.0 STATEMENT OF WORK REQUIRED

7.1 Arrangements/Outfitting

7.1.1 Provide services of an ABS approved ESP Hull Certified Gauging Company to accomplish ultrasonic thickness readings in accordance ABS Rules and Regulations.

Suggested Source:

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7.1.2 Ultrasonic thickness gaugings to be taken but not limited to the following areas:

Cargo Tanks Ballast Tanks Under 01 Deck Reefer Containers Under UnRep Winches Under Anchor Windlass Focsle Area 02 Deck Tank Deck, Tank Tops Under Evaporators, 40 Foot Flat Port Side Under CFW Coolers, 25 Foot Flat Port Side Fuel Tank Bulkheads Foundations Chain Locker Sump

7.1.3 The Contractor shall provide assistance to the gauging firm in gaining access to the areas and/or structure to be gauged. GFE rafts and PFD’s shall be provided to access areas of tanks during tank rafting evolution.

7.1.4 The contractor is to provide a unit price per shot up to a total of 30,000 readings.

7.2 Structural: None additional

7.3 Mechanical/Fluid: None additional

7.4 Electrical: None additional

7.5 Electronics: None additional

7.6 Preparation Of Drawings: None additional

7.7 Inspection/Test

7.7.1 Provide the services of an ABS recognized ESP Hull Gauging Firm to satisfy the requirements of the ABS Special Periodic Survey 4 (15< Age < 20 years) IAW ABS Rules and Regulations (Same requirements as Special Periodic Survey #3). Survey shall include, but not limited to, Close-up Survey, Thickness Measurements and Special Periodical Survey #4 as stated in the ABS Rules and Regulations (Part 7, Chapter 3, Section 2) NOTE: Ship’s force shall be responsible for transferring water to and from tanks to ensure proper rafting levels to satisfy the ABS requirements.

7.7.2 Contractor (ABS recognized ESP Hull Gauging Firm) shall take gauge readings, but not limited to, the following areas:

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7.7.3.1 Hull Plating

7.7.3.2 Tank Tops

7.7.3.3 Structural Bulkheads

7.7.3.4 Tank Bulkheads

7.7.3.5 Foundations

7.7.4 After completion of all thickness measurements required, a typewritten report is to be prepared in ABS acceptable format and to the satisfaction of Local ABS Surveyor. One copy is to be submitted to the ABS Surveyor, one copy shall be submitted to the Port Engineer, and one copy is to be submitted to the Vessel’s Master. The report shall give the location of measurements, the thickness measured as well as the original thickness, and the percentage of wastage. The measuring equipment type, calibration certification and names of the persons taking the measurements and their qualifications shall also be included in the report.

7.7.5 The contractor shall develop a composite drawing of location of each reading in relation to the frame numbers, seams and butt welds, plating, and internal structural members.

7.9 Marking: None additional

7.10 Manufacturers Representative: None additional

8.0 GENERAL REQUIREMENTS: None additional