PD13WRGRVEA05RevC30July2013.pdf

PD13WRGRVEA05

CAGE 98752

Rev C 30 July 2013 Superseding Rev B 25 July 2013

PURCHASE DESCRIPTION

TANK, STORAGE, LIQUID OXYGEN/LIQUID NITROGEN

4.2 First article inspection.

Was: First article inspection and tests shall be performed on two complete tank assemblies (one of each type). Each first article tank assembly shall be subjected to the analyses, demonstrations, examinations, and tests described in 4.6.1 through 4.6.14.4. The contractor shall provide or arrange for all test equipment and facilities. Nonconformance to any specified requirement, the failure of any test, or the presence of one or more defects shall be cause for disapproval of first article.

Change to: First article inspection and tests shall be performed on two complete tank assemblies (one of each type). Each first article tank assembly shall be subjected to the analyses, demonstrations, examinations, and tests described in 4.6.1 through 4.6.14.4. Due to the similarities between the Type I and Type II tank assemblies, the Liquid Oxygen 500-gallon complete tank assembly shall be used for the environmental testing sections 4.6.7.2 through

4.6.7.11. The contractor shall provide or arrange for all test equipment and facilities.

Nonconformance to any specified requirement, the failure of any test, or the presence of one or more defects shall be cause for disapproval of first article.

4.6.7.1 Vibration.

Was: The tank assembly shall be filled to design capacity with a cryogenic liquid having a density of not less than 9.5 pounds per U.S. gallon and pressurized to not less than 45 psig. The filled and pressurized tank, with the servicing hose secured in the storage position, shall be subjected to the vibration testing specified in MIL-STD-810 method 514.6, category 4, 7 and 8, transportation, to show compliance with the requirements of 3.4.4. The tank assembly shall be carefully examined after each test phase and following completion of the overall test. Damage to or failure of any tank assembly components, loosening of fasteners, loss of instrument calibration, or loss of vacuum in the annular space shall be considered a failure of the tank assembly to pass the test.

Change to: The tank assembly shall be filled to design capacity with a cryogenic liquid having a density of not less than 9.5 pounds per U.S. gallon and pressurized to not less than 45 psig. The filled and pressurized tank, with the servicing hose secured in the storage position, shall be subjected to the vibration testing specified in MIL-STD-810 method 514.6, category 4, 7, 8, 10 and 11, transportation, to show compliance with the requirements of 3.4.4. The tank assembly shall be carefully examined after each test phase and following completion of the overall test.

Damage to or failure of any tank assembly components, loosening of fasteners, loss of instrument calibration, or loss of vacuum in the annular space shall be considered a failure of the tank assembly to pass the test.