Jiangyin Sanjie Boiler is a Jiangyin-based engineering firm supporting the marine sector with pressure vessel work and complementary underwater inspection services along the lower Yangtze River. The company holds service supplier recognition from ABS, allowing it to undertake attendances and testing that contribute to classification survey records for vessels under that society. Pressure vessel activity covers periodical inspection, hydrostatic and pneumatic testing of boilers, heat exchangers, air receivers and other shipboard pressure equipment, with documentation prepared in formats acceptable to attending class surveyors. Jiangyin Sanjie Boiler also conducts underwater inspection in lieu of drydocking, providing video recordings and written reports that support the deferral of scheduled bottom surveys for suitable vessels operating in calm-water trades. Jiangyin sits within a major shipbuilding and steel-fabrication corridor on the Yangtze, giving practical access to building docks, repair facilities and anchorages used by bulk carriers, tankers and general cargo ships moving between inland yards and the East China Sea. Procedures are written in line with relevant IACS unified requirements and ABS rules for pressure equipment, with qualifications of NDT personnel and calibration of testing instruments maintained to support traceable, audit-ready records. By combining pressure vessel inspection with underwater attendances, the team supports owners and managers needing focused, class-aligned services during short repair stays or while vessels are alongside loading and discharging cargo. Jiangyin Sanjie Boiler retains records of test pressures, dwell times and acceptance criteria for traceability, and releases reports in English where required for international clients. The firm coordinates attendance with class surveyors and shipyard planners to align inspection slots with available windows, helping owners avoid unnecessary off-hire while keeping certificates current and statutory documentation aligned with vessel programmes.