NANTONG HANGTAI MARINE MACHINERY CO., LTD. is based in Nantong, a Jiangsu Province port city on the north bank of the lower Yangtze that hosts large shipyards and offshore yards including Rugao, Tongzhou Bay and Qidong, together with a strong supply base of marine machinery and equipment manufacturers serving new construction and ship-repair work along the river and the surrounding coastal anchorages. The firm provides marine machinery service work covering pressure vessel inspection and in-water survey scopes on commercial tonnage calling Nantong-area yards and Yangtze anchorages used for crew change, bunkering and routine maintenance during ordinary commercial calls. Pressure vessel inspection covers engine-room auxiliary vessels, air receivers, hot-water and steam-side pressure equipment installed onboard merchant ships, with internal and external visual examination, hydrostatic and pneumatic testing, safety-valve set-pressure verification and renewal of associated certification documentation in accordance with class rules. Underwater inspection is provided by qualified diver-technicians performing close visual examination of hull plating, sea chests, propellers, rudders, anode wastage and other below-waterline items, with video and photographic documentation prepared in formats accepted by attending classification surveyors. Routine deliverables include detailed in-water survey reports and pressure vessel inspection records supporting class periodical, intermediate and special surveys. Hangtai holds service supplier recognition by the American Bureau of Shipping, allowing pressure vessel inspection and in-water survey reports to be considered during class survey programmes on commercial tonnage attended at Nantong-area yards and along the lower Yangtze River corridor. Customers include shipyards, ship managers, owners and class surveyors arranging routine maintenance attendance during construction, repair and survey campaigns in the Nantong area.