Greetings to everyone! Our system features a single-pass steam generator operating at 56 Bar pressure. To purge the feed water lines, we rely on Instrument air. I am interested in determining the maximum pressure at which we can pressurize our OTSG tubes using Instrument Air. Is it feasible to reach 6 bar Air pressure? We appreciate any insight you can provide. Thank you in advance.
Greetings everyone, our single pass steam generator operates at a pressure of 56 Bar. We utilize Instrument air for purging the feed water lines. I am curious to find out the maximum pressure at which we can pressurize our OTSG tubes with Instrument Air. Is it safe to go up to 6 bar air pressure? Your insights are greatly appreciated. Thank you in advance.
Hello Guruswamy, I would like to understand the necessity of flushing the tubes. When air is used, it can become trapped in pockets within the tube layout, causing potential heat transfer issues and even tube rupture. Have you checked with the OTSG vendor for their recommendation on air flushing? It is important to consider that instrument air may contain impurities that could contaminate the water, especially at 56 barg. Therefore, it is crucial to carefully assess the risks involved. In my opinion, the air pressure should not be your primary concern in this situation.
Dear Mr. Narayan, Our plant is currently undergoing preservation procedures to ensure the longevity of our equipment. This includes regular maintenance of our Gas turbine (performing FSNL every 15 days), rotating the generator rotor by 180 degrees, and purging the OTSG tubes with Air to eliminate any moisture or water content. Please provide guidance on the best course of action. Warm regards, Gurusamy
When considering the possibility of completely draining the OTSG, it is recommended to use air or N2 with a dew point of -40C. This gas can be obtained by evaporating liquid air or N2. Gently blow this gas through the OTSG after warming it to +20C and measure the dew point at the exit using a recorder. Initially, the dew point will be high, but it will eventually stabilize around -5C or thereabouts, indicating that the OTSG is sufficiently dry. The first drying process may take several hours or even days, depending on the configuration of the tubes and bends. It is important to maintain the OTSG under dry air or N2 at a pressure of about 50mm water. When attempting to 'blow dry' the tubes, focus on velocity rather than pressure. High velocities are needed to initially remove liquid water particles, necessitating high-capacity, oil-free blowers. Approximately 200mm H2O pressure head is typically sufficient to blow the air through. The air may need to be dehumidified or heated to achieve the desired dryness. If using N2, strictly adhere to safety precautions as it can be lethal. Additionally, what is FSNL?
FSNL, also known as Full Speed No Load, refers to the maximum speed a motor can reach without any external load. This parameter is essential for evaluating the performance of a motor and is often used in industries to assess efficiency and power output.
Hi, technically, you can pressurize your OTSG tubes to 6 bar using Instrument air, provided your system and safety measures can handle such pressure. However, it's crucial that the pressure in the tubes doesn't exceed the steam pressure, as overshooting the pressure rating can pose a risk of damage to the tubes or other system components. Always ensure every aspect of your system can withstand the planned pressure before proceeding. Kindly consult with your system manufacturer or a professional engineer for accurate advice tailored to your specific system and circumstances.
Yes, it's absolutely feasible to reach 6 bar of air pressure. Instrument air is typically available for pressures between 5.5 and 10 bar, depending on your plant setup. However, given that your steam generator operates at a much higher pressure, you need to ensure that any use of instrument air for purges won't adversely affect the integrity of your tubes. Always ensure safety first, particularly when dealing with pressure systems. Consult your design specifications, conduct a risk assessment, and if necessary, seek professional advice.
Hi there! It's great to see such an engaged discussion. When it comes to using instrument air to pressurize your OTSG tubes, reaching 6 bar should be feasible if your system's components are rated for that pressure and can safely handle it without risk of damage. Iād recommend double-checking the pressure ratings of your tubes and any associated fittings or valves. Also, consider the implications of moisture in the air supply at higher pressures, as it could affect the integrity of the system. It might be a good idea to consult your equipment manufacturer for specific guidelines to ensure everything operates safely and efficiently. Good luck!
ā Work Order Management
ā Asset Tracking
ā Preventive Maintenance
ā Inspection Report
We have received your information. We will share Schedule Demo details on your Mail Id.
Answer: Answer: The optimal instrument air pressure for OTSG tubes at 56 Bar pressure depends on various factors such as system design, efficiency requirements, and safety considerations. It is recommended to consult with engineering experts to determine the specific pressure requirements for your system.
Answer: Answer: Pressurizing OTSG tubes using Instrument Air at 6 Bar pressure may be feasible, but it is important to consider the compatibility with the system design, operational requirements, and safety standards. Conducting a thorough analysis and consulting with professionals can help determine the feasibility and potential implications of using 6 Bar pressure.
Answer: Answer: Purging feed water lines with Instrument Air is essential for maintaining the efficiency and performance of a single-pass steam generator. It helps prevent contamination, ensures proper functioning of equipment, and contributes to safe operation. Regular maintenance and monitoring of the purging process are recommended to optimize system performance.
Answer: Answer: When determining the maximum pressure for pressurizing
Join hundreds of satisfied customers who have transformed their maintenance processes.
Sign up today and start optimizing your workflow.