T/XZBX 0178-2025 The specification for quality control of water quality testing for pressure special equipment

Scope

During the operation, commissioning, maintenance, and testing of pressure-bearing special equipment (such as boilers, fixed pressure vessels, pressure pipelines, and their supporting water and steam systems), the physical and chemical indicators of water (including feedwater, boiler water/furnace water, condensate water, circulating cooling water, chemical cleaning water, and water for hydraulic testing) directly affect the safety, reliability, and lifecycle cost of the equipment. Water quality that fails to meet requirements may induce or accelerate failure mechanisms such as corrosion, scaling, stress corrosion cracking, pitting corrosion, crevice corrosion, and under-deposit corrosion, and may lead to deterioration of heat transfer in heating surfaces, local overheating, clogged tube bundles, malfunctioning valves, and instrument drift, thereby causing shutdowns, economic losses, and even safety accidents. Therefore, water quality testing is not only a fundamental task in operation and maintenance, but also an important technical support for risk prevention and control of pressure-bearing special equipment. In practical engineering, water quality testing faces challenges such as complex multi-source sampling conditions, diverse indicator systems, significant differences in testing methods and instruments, coexistence of on-site rapid testing and laboratory precision testing, and the need for testing data to serve process adjustment and safety decision-making. If there is a lack of systematic quality control, problems such as insufficient sampling representativeness, improper sample storage, unclear applicability of testing methods, non-standardized traceability and calibration of measurement values, inadequate data review, and incomplete record chains may occur, leading to inaccurate or untraceable testing results and undermining the effectiveness of water quality control. To standardize water quality testing activities for pressure-bearing special equipment an

Development Information

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