U.S. warships appeared weld issues, including all LPD17 class transport ships
The article said that the U.S. Navy’s newest equipment LPD-17 “San Antonio” class amphibious transport dock ship all presence weld problems, according to Jane’s International Naval
May 10, 2010 reported that 13 U.S. Navy plans to weld non-compliance of ships to take remedial measures, these ships by Northrop Grumman in A Man Dyer (near New Orleans) and Ingalls (Pascagoula) in shipyard .
introduced, according to Naval Sea Systems Command, most of the pipeline group P1 (pipeline operating pressure 300Psi, temperature 650 ℉) of the weld has been identified, if given the chance, will be repaired. Command, said, P2 the number of pipeline welds have been checked, but the specific measures of these welds has not been set.
the affected vessels include: “Arleigh Burke” class destroyers “Alexis de Houston” was (DDG103), “Gray Fuli” number (DDG107) and “P · William Lawrence,” No. ; all of the “San Antonio” class amphibious transport dock ship, and “Wasp” class amphibious assault ship, “Makin Island”.
weld these ships 10% to 15% do not meet the design requirements, but through the Navy’s inspection. Although not directly lead to weld the risk of failure, but the Navy said the operation would lead to non-compliance of the whole life of the device in the vessel before the failure.
lack of response to their work, A Man Dyer and Ingalls shipyards and naval experts responsible for welding inspection work inspectors, was canceled and re-qualification appraisal.
2008 in October in the “San Antonio” was the inaugural encounter the main lubricating oil system leak, found a pipe weld problems. At that time, the ship ran aground in Bahrain, where the discovery pipeline linking oil system enough to withstand the weight, leading to a result of vibration caused the weld cracking.
the cost of remedial measures until a cause for concern, the Navy and Northrop Grumman has not yet reached an agreement on this. (China Shipping Information Center Liu Zhenghua)