Elliptical heads require diligent upkeep to ensure their integrity and longevity. This guide outlines essential preservation strategies:

1. Hydraulic Testing Protocol: Water utilized for hydrotesting must contain chloride ions below 25mg/L. Following the test, ensure the head is thoroughly dried immediately.
2. Acid Cleaning Precautions: When pickling stainless steel components, avoid reducing acids like hydrochloric acid.
3. Material Compatibility: Strictly adhere to the chemical resistance guidelines specified within the relevant tolerance documentation.
4. Surface Protection: Prevent physical damage to the stainless steel head surface, including impacts, dents, and scratches.
5. Contamination Avoidance: Minimize direct contact between the stainless steel head and carbon steel structures to prevent iron ion contamination.
6. Storage Requirements: Store heads under shelter; exposure to weather elements and precipitation must be avoided.
7. Welding Considerations: Design structures to minimize excessive restraint during welding, thereby preventing undue stress. Avoid forced fit-up.
8. Post-Welding Procedures: After welding the elliptical head to the cylinder, promptly remove all welding slag, spatter, and surface contaminants from the weld seam and surrounding heat-affected zone. Conduct Liquid Penetrant Testing (PT) and execute surface pickling as required.