Steam drum manhole
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The performance standards for inward-opening drum manway doors, as well as the procedure for replacing gaskets, apply here; the operating pressure is 7.0 MPa and the operating temperature is 285°C.
The performance standards for inward-opening drum manholes are usually determined in accordance with relevant pressure vessel **or industry standards; for specific details, refer to standards such as JB/T 4712-2007 \"Technical Requirements for Manholes in Steel Pressure Vessels\". The steps for replacing the gasket are as follows: 1. Ensure that the equipment is shut down and that the pressure has been released and the temperature has dropped. 2. Use special tools to loosen and remove the fastening bolts or nuts on the manhole cover. 3. Remove the manhole cover and take out the old gasket. 4. Clean the dirt and residues from the contact surface between the manhole and its cover. 5. Check the integrity of the manhole cover and gasket seat for any cracks or severe scratches. 6. Place a new gasket, ensuring that its type and size meet the requirements, and position it correctly in the seat groove. 7. Reinstall the manhole cover in place and tighten the bolts or nuts evenly. 8. Tighten gradually in a cross-diagonal pattern at the specified torque to ensure even compression of the gaskets. 9. After completion, conduct inspections and pressure tests to ensure there are no leaks. The entire process should be carried out by professional technicians to ensure safety. .
It should be a manhole design of domestic origin. There are drawings on the forum. Search for it.