Microsoft Word - SOP - Hands-On Sessions

P-015

Maintenance Procedure Non-Standard Oil Draining

Page 19 of 20

3.d. Returning Alternate Configurations Not Listed Previously to Normal Operation STEP/ACTION COMMENT 7. Don personal protective equipment.

Refer to the PPE Assessment for Mechanical Repair for a list of appropriate PPE. If the services of outside contractors are to be utilized, all contractor’s operations are to be supervised by our personnel per the “Contractor Qualification Program”.

8. Confirm that the valves utilized for isolation as specified in the plan developed in Task # 2.d. of this procedure are closed, tagged, and locked out.

9. Confirm the drain valve identified in the isolation procedure is closed. 10. Install plug in drain valve identified in the isolation procedure. 11. If automatic valves are located within the section of the Ammonia Refrigeration System being worked on, change the automatic valve(s)’s manual operating stem to the “AUTOMATIC” operating position for any automatic valve in the isolated piping. 12. Remove locks and tags and slowly open the outlet valves isolating the section of the ammonia Refrigeration System, as specified in the plan developed in Task # 2.d. of this procedure. If a small ammonia leak is observed, the source of the leak should be investigated and the leak repaired. If a large leak occurs, perform emergency isolation, secure the area to prevent unauthorized personnel from entering; Close, lock and tag upstream hand valve, notify safety personnel and pumpout the isolated section. See Task #2.d. “Oil Draining Alternate Configurations Not Listed Previously”. 14. Remove locks and tags and slowly open the inlet valves isolating the section of the Ammonia Refrigeration System, as specified in the plan developed in Task # 2.d. above. 13. Check for ammonia odor.

NOTE: Work quickly and do not stop the procedure as there is a possibility of a hydrostatic lock, which can result in ruptured piping and a release of ammonia!

Revision 1, November 1, 2023

This Copy Printed: November 1, 2023

MP-015 Non-Standard Oil Draining.doc Last Reviewed: October 30, 2023