Is steam pressure testing required when the unit is put into operation?

Before starting up chemical or petroleum processing plants, it is usually necessary to inspect the system and carry out preparatory work to ensure safety and the proper operation of the plant. Typically, this involves the following steps: 1. **System cleaning and purging**: Using steam or an inert gas (such as nitrogen) to purge the system in order to remove impurities and air from the pipelines and equipment. The purpose is to reduce the risk of oxygen in the air reacting with the materials inside the device, as well as to eliminate potential contaminants. 2. **System inspection**: After cleaning and purging, the system needs to be inspected to verify the integrity and usability of the equipment. At this point, stress testing may be necessary, but it is usually carried out using water or air. 3. **Steam Pressure Test (Hydrostatic or Pneumatic Test):** A steam pressure test is not a routine procedure before commissioning. Pressure testing generally refers to the strength and sealing performance tests of pressure-bearing equipment such as pipes and containers, using liquids (such as water, known as hydrotesting) or gases (such as air, known as pneumatic testing). These tests are usually carried out during equipment installation, major repairs, or periodic inspections as required by regulations. 4. **System pressurization for leak detection**: Once the device has been purged, steam or other substances are sometimes used to pressurize the device, with the aim of checking its airtightness and identifying any potential leakage points. When using steam for leak detection, the pressure level at which pressurization is carried out is usually determined based on process requirements and design pressure. It should be noted that decisions regarding the pressurization pressure of the device and whether to use steam for pressurization must be determined in accordance with the equipment design specifications, safety standards, and process requirements. Since steam has a certain temperature and pressure, special attention must be paid to safety when using it, to avoid causing overheating or overpressure damage to the equipment. As for the specific issue of whether the absorption stabilization system should be pressurized with steam at several MPa, this needs to be determined based on the design parameters and pressure levels of that system. In practice, such operations must be carried out strictly in accordance with the site operating procedures (SOPs), and under the guidance of professionals, to ensure compliance with relevant industrial standards and safety regulations. In practice, the specific operations should be carried out in accordance with the device’s process design documents, operation manuals, and safety regulations, while also complying with local laws and standards. Before carrying out any work, it is most important to ensure that all safety and preventive measures are in place; if necessary, consult experienced engineers or professionals. .

For airtightness, nitrogen should be used; steam is used for achieving airtightness, but temperature changes cause the steam to condense, resulting in constant pressure changes