Ultrasonic Side Scan Testing Services

STATEMENT OF WORK (SOW) PR#2126406Y6164A81005 For Ultrasonic Side Scan Testing Services 1.0 GENERAL Background: The U.S. Coast Guard Yard will require Ultrasonic Side Scan Testing Services for upcoming vessels scheduled for Yard Availability.  The vessel lengths include but are not limited to 327’ Barque Eagle, 270’ Medium Endurance Cutters, 225’ Seagoing Buoy Tenders, 210’ Medium Endurance Cutters, 175’ Coastal Buoy Tenders, 154’ Fast Response Cutters, 140’ Ice Breakers, 110’ and 87’ Patrol Boats, 65’ Tender/Barges, and 75’ Tender/Barges.     Scope The Contractor shall provide all personnel, equipment, supplies, facilities, transportation, tools, materials, supervision, planning, and other items and non-personal services necessary to perform Ultrasonic Side Scan Testing services as defined in this SOW except for those items specified as Government furnished property and services.  Ultrasonic Side Scan Testing services shall be performed at the U.S. Coast Guard Yard, 2401 Hawkins Point Road, Baltimore, MD.  OBJECTIVE The Contractor shall provide Ultrasonic Side Scan Testing Services with suitable side scan equipment to conduct a “Scanning Crawler Automated Test” of the vessel’s underwater (u/w) hull, freeboard plating, decks, tanks and other various areas for presence of metal corrosion and deterioration. APPLICABLE PUBLICATIONS (CURRENT EDITIONS) PUBLICATIONS The following documents provide specifications, standards, or guidelines that must be complied with in order to meet the requirements of this contract: U.S. Coast Guard Yard ISO 9001 Quality Management and ISO 14001 Environmental Management Systems certifications.  American Society for Nondestructive Testing (ASNT) CP-189 Standards for Qualification and Certification (2020)   29 CFR 1915- Occupational Safety and Health Standards for Shipyard Employment. SPECIFIC REQUIREMENTS/TASKS 2.1 ULTRASONIC SIDE SCAN TESTING The Contractor shall provide Ultrasonic Side Scan Testing Services with suitable side scan equipment to conduct a “Scanning Crawler Automated Test” of the vessel’s underwater (u/w) hull, freeboard plating, decks, tanks and other various areas for the presence of metal corrosion and deterioration. Measuring thickness using multiple back wall echoes is not permitted with the automated scanner. Ensure the following:  All scanning operations shall be completed by personnel meeting the following qualifications at a minimum: American Society for Nondestructive Testing (ASNT) CP-189 ASNT Standard for Qualification and Certification (2020)    ASNT Level III Certified Analyst shall be on site to oversee the project and evaluate all data collected.   ASNT level II or III Analyst shall be on site to verify with a handheld gauge all areas on the hull identified as thinner than the criteria specified below. Digital thickness gauges are not permitted to accomplish this procedure.   Must follow the ASNT Standard CP-189 (2020) for all personnel qualifications and certifications.    The above qualified personnel shall be on site to complete corrosion inspections as needed.   2.1.1 SCANNING PARAMETERS The Contractor shall use the following parameters through the course of this inspection for all vessels:   Plates where scan data indicates wastage greater than or equal to 25% of the nominal plate thickness shall be highlighted in “RED” and designated as “repair areas”.   Plates where scan data indicating wastage between 15% to 24% of the nominal plate thickness shall be highlighted in “YELLOW”    Plates where scan data indicating wastage less than 15% of the nominal plate thickness shall be highlighted in “GREEN.”    2.1.1.1 The Contractor shall ensure that automated scanning resolution is set to 0.5” x 0.5”    2.1.1.2 The Contractor shall measure the average paint coating thickness using 12 random readings per side of the vessels 110 feet or less and 25 random readings for vessels exceeds 110 feet in length. Subtract the average paint coating thickness from all the measurements to approximate the actual steel thickness for each point. Include results of the random readings with their approximate location on the vessel and the calculated average in the final report.     2.1.1.3 The Contractor shall make all hull markings with a paint pen.    2.1.1.4 Handheld Ultrasonic Thickness (UT) readings shall be taken to verify deteriorated metal areas found with side scan equipment.  All readings shall be provided to the Contracting Officer’s Representative (COR), along with the lowest reading marked on the hull at the location of deteriorated metal.    2.1.1.5 Areas that are accessible but cannot be reached by the automated scanner shall be scanned with a handheld meter at a resolution of 2” x 2”.  Areas that the automated scanner lost data due to sharp dents, rough surface, etc. shall be measured with an A-Scan thickness gauge at a resolution of 1” x 1”. Any repair areas found during the hand scan shall be marked on the ship’s hull and their approximate positions recorded on the plate drawings and report summary.  2.2 SIDE SCAN INSPECTION AREAS The Contractor shall scan areas including the Decks, Port, Starboard and Transom exterior shell, but shall exclude the following: Areas under and within 6-inches of blocks and side blocks (areas that are accessible 6 inches from the blocks and side blocks must be scanned).  Areas up to 6-inches around any obstacles on the hull including sea suctions, discharges, rudderposts, knuckle, bow stem, stabilizer tubes, and stern tubes as applicable.  Any areas blocked by immovable scaffolding or other shipyard activity.  2.3 SIDE SCAN REPORT The Contractor shall submit to the COR and the contracting officer a final written report within three (3) working days after the side scan inspection is completed. A copy of all repair areas shall be clearly marked on the provided shell pl…