MOC-100-1A ABS Load Line Survey.pdf

MOC-100-1A

August 2003

Superceding

AMC-100-1

October 1988

NATIONAL OCEANIC AND ATMOSPHERIC ADMINISTRATION (NOAA)

MARINE OPERATION CENTER

STANDARD SPECIFICATION MOC-100-1A

ABS LOAD LINE SURVEY

1. SCOPE. This specifications contains the requirements for conducting an American Bureau of Shipping (ABS) Load Line Renewal Survey on NOAA ships.

2. REFERENCES.

None

3. REQUIREMENTS.

3.1 General.

3.1.1 Provide the services of an ABS Surveyor to conduct a

Load Line Renewal Survey to the extent necessary to obtain a new Load Line Certificate.

3.1.2 Provide staging, scaffolding, and manlifts as

required for inspections by the ABS Surveyor and for performing the other work required by this specification.

3.2 Survey Schedule.

3.2.1. Develop, in consultation with the ABS Surveyor, a

written survey schedule that lists the items to be inspected and the scheduled dates and times of the inspections. Submit the survey schedule to the COTR within 48 hours after the start of the contract performance period.

3.2.2 The survey schedule shall list all initial

inspections required by the ABS Surveyor, including a listing of all items which may be covered by other contract items.

3.3 Ultrasonic Tests (UT) for Thickness Gaging.

3.3.1 Conduct UT thickness gagings of shell plating, decks, bulkheads, and other structural members in locations specified by the ABS Surveyor and the COTR.

3.3.2 Prepare the steel surfaces as required to obtain

accurate UT thickness readings. After readings have been taken, restore coating systems to that which existed before the surfaces were prepared.

3.3.3 Workers performing the UT thickness gaging shall be

certified as Level Two craftsmen by the American Society for Non- Destructive Testing in accordance with Recommended Practice No.

SNT TC-1A, (latest edition). Copies of the workers' certificates shall be provided to the COTR prior to performing the gaging.

3.3.4 The results of the UT thickness gaging shall be

recorded as follows:

a. Prepare a table which lists for each gage reading the location, actual thickness, original thickness, percentage of wastage, and recommendations (if any).

b. Prepare schematic diagrams of the shell plating, decks, bulkheads, and other structural members which reflects the approximate location of each reading and the actual reading obtained at each location.

3.3.5 Submit 3 copies of the table and diagrams to the

COTR.

3.3.6 Except for removal and restoration of coatings, or

unless otherwise specified in the Detail Specifications, removal and restoration of deck coverings, insulation, and other interferences are not required in order to take UT readings.

3.4 Tank Inspections.

3.4.1 Open, clean, ventilate, and take all other action

needed to make each specified tank safe for entry of workers.

Post a gas-free certificate, issued by a Marine Chemist certified by the National Fire Protection Association, near the access opening to each tank. Provide a copy of each gas-free certificate to the COTR.

3.4.2 Prior to drydocking the ship, prepare a Liquid

Transfer/Removal Plan outlining a comprehensive procedure for transfer and removal of all liquids in the tanks to be inspected.

Included shall be the quantities and location of liquids to be transferred between tanks and the quantities and location of liquids to be removed, stored, disposed of and returned. If transfer of liquids while the ship is drydocked is planned, the dockmaster shall approve the Plan. A copy of the Plan shall be submitted to the COTR at least 3 work days prior to drydocking the ship.

3.4.3 When fuel and lube oil tanks are required to be

opened for inspection, the following shall apply:

a. When requested by the contractor, NOAA will transfer fuel between onboard available fuel tanks by pumping out the fuel to the low suction level using the ship's installed fuel transfer system. In the event the ship's installed fuel transfer pump or system has been disabled by the contractor in conjunction with other work, the contractor shall transfer the fuel.

b. If circumstances or requirements make transfer between tanks of some or all the fuel to be impracticable, the contractor shall pump the fuel from the tanks to clean moisture-free dockside storage tanks. The contractor may pump and store as much of the fuel off the ship as desired. After the onboard fuel tanks have been closed, return the fuel through filters to the tanks.

c. In lieu of storing the fuel oil, the contractor may elect to properly dispose of the fuel oil removed from the ship.

If so, provide new fuel oil, through fuel filters, of the same quality and the same quantity as that removed.

d. For each lube oil tank required to be opened for inspection, pump all lube oil into clean moisture-free dockside storage tanks and return to the lube oil tank through filters after inspections have been completed.

e. All fuel and lube oil being removed from the ship shall be metered with a calibrated meter during off-loading and during return to verify that the same quantity is returned as was removed. In addition, test samples shall be taken of the oils being removed and the oils being returned. The samples shall be analyzed by a lab to verify the quality of the oils being returned is equal or better than that removed. Provide copies of lab reports to the COTR.

f. Thoroughly clean all opened fuel and lube oil tanks of all sludge, dirt, loose scale, dirt, debris, growth, water, and other contaminants prior to closing.

3.4.4 If sludge or waste oil tanks are required to be

inspected, pump and properly dispose of the contents of the tanks off the ship.

3.4.5 Except as otherwise specified, NOAA will pump down all

tanks to the low suction level of the installed ship's piping system. The contractor shall pump out and properly dispose of all remaining water, fuel, sludge, and other tank contents.

3.4.6 Rig sufficient lighting in each opened tank to allow a

thorough inspection.

3.4.7 After all tanks have been inspected by the ABS

Surveyor and when accepted by the COTR, close each opened tank using new gaskets. Renew all missing and broken fasteners and use dies to rechase all manhole cover stud threads. Notify the COTR at least four hours in advance of closing each tank.

Immediately prior to closing each tank, the COTR or a member of the ship's engineering force will inspect the tanks interior to verify that rags or other residual debris has not been left.

3.4.8 Perform a 2.0 psig air test on each tank after

closing. Hold the pressure and check manhole covers for leaks using a soapy water solution.

3.5 ABS Documents. Submit, or have ABS submit, the following

ABS-prepared documents to Marine Operations Center - Pacific, 1801 Fairview Ave East, Seattle, WA 98102:

3.5.1 Copy of ABS Report of Annual Load Line Inspection

form.

3.5.2 The original and one copy of a new Load Line

Certificate.

4. NOTES.

4.1 The following information will be provided in the Detail

Specification or other procurement document:

4.1.1 The number of UT thickness gage readings required.

4.1.2 The tanks required to be opened for inspections.

4.1.3 The quantity of fuel and lube oil which will be

onboard the ship at the start of the contract performance period.

4.1.4 The total capacity of the ship's fuel tanks.

4.2 Most of the work required by this specification must be

accomplished while the ship is drydocked. A separate specification item will cover the detail requirements for drydocking the ship.

END OF SPECIFICATION