S30408 2:1 Stainless Steel Elliptical Dished Head With Reduced Opening

• Model Identification: 2:1 Elliptical Dished Head with Reduced Opening (EHA450*4), made of S30408 stainless steel. The 2:1 aspect ratio design ensures more uniform force distribution, suitable for small and medium-sized high-pressure pressure-bearing equipment.
• Dimension Details: Standard inner diameter 450mm, meeting the adaptation needs of small and medium-sized storage tanks and pressure vessels in the food, pharmaceutical, and fine chemical industries; the reduced opening size supports customization from 50mm to 180mm, suitable for the installation of pipes, valves, and inspection ports of different specifications. After precision CNC machining, the concentricity tolerance of the reduced opening is ≤ ±0.6mm, ensuring precise connection with other components; the diameter tolerance is controlled within ≤ ±1mm through laser cutting, complying with the assembly accuracy standards of high-pressure equipment.
• Thickness Performance: Nominal thickness 4mm, ensuring structural strength while balancing lightweight, suitable for working pressures of 0.5MPa-10MPa, applicable to small and medium-sized high-pressure storage tanks, precision reaction vessels and other scenarios; relying on high-quality S30408 base material, the thickness deviation is ≤ 0.3mm, avoiding stress concentration caused by uneven thickness and extending the service life of equipment.

Adopting S30408 food-grade stainless steel, it has excellent corrosion resistance at room temperature and medium-low temperature, capable of resisting corrosion from the atmosphere, weak acids, alkalis and organic media, with no risk of heavy metal precipitation, complying with the hygiene standards of the food and pharmaceutical industries; the material is sourced from certified suppliers such as Taiyuan Iron and Steel and Baosteel, providing complete Material Test Certificates (MTC) to ensure quality traceability.

1. High-Pressure Adaptability: The 4mm thickness combined with the 2:1 elliptical structure increases the pressure-bearing capacity by 30% compared with ordinary elliptical heads, meeting the pressure requirements of small and medium-sized high-pressure equipment, suitable for scenarios such as high-pressure reactions in fine chemicals and aseptic storage tanks in pharmaceuticals.
2. Hygienic Grade Guarantee: The surface of S30408 material is easy to clean, with no risk of medium residue, and has passed the food contact material certification, which can directly contact food raw materials, liquid medicines, etc., meeting the requirements of hygienic production.
3. Integrated Design: The integrated reduced opening eliminates the need for secondary welding of pipe connections, reducing leakage risks by more than 30%, simplifying the equipment assembly process, and avoiding damage to the head structure caused by welding stress, further improving safety under high-pressure working conditions.

Cold forming process (designed specifically for 4mm thick S30408 plates) is adopted, with segmented precise pressure control through an 800-ton hydraulic press, combined with a 2:1 elliptical special mold, avoiding material performance degradation caused by hot working. The surface of the formed head is smooth, with no defects such as cracks and wrinkles, ensuring structural integrity and uniform force distribution.

• Chemical Polishing: Achieves a surface roughness of Ra ≤ 1.6μm, reducing medium adhesion, facilitating daily cleaning and maintenance, suitable for food and pharmaceutical equipment needs.
• Passivation Treatment: Forms a dense oxide film on the surface, improving corrosion resistance to weak acids, alkalis and organic media, suitable for fine chemical equipment scenarios.
• Custom Options: Mirror polishing (Ra ≤ 0.8μm) or sandblasting (Ra 1.6μm-3.2μm) can be provided on demand to meet different appearance and functional needs, such as the mirror hygiene requirements of pharmaceutical aseptic equipment and the anti-slip sandblasting needs of chemical equipment.

1. Ultrasonic Testing (UT): 100% coverage of the head body to check for internal inclusions, air holes and other defects, ensuring no structural hidden dangers and adapting to high-pressure working conditions.
2. Penetrant Testing (PT): Detects surface and near-surface cracks and pinholes to prevent medium leakage and ensure sealing performance.
3. Dimensional Inspection: High-precision calipers and coordinate measuring machines are used to verify the diameter, thickness, reduced opening size and 2:1 aspect ratio, ensuring compliance with design requirements.
4. Pressure Testing: Sampling water pressure tests of 1.5 times the rated pressure are conducted, with pressure maintained for 30 minutes without leakage, verifying pressure-bearing capacity and sealing performance.
5. Visual Inspection: Checks for surface scratches and dents, ensuring a flat and flawless appearance, and the surface roughness meets the established standards.

• Applicable Standards: ASME BPVC Sec.VIII Div 1, PED 2014/68/EU, GB/T 25198-2010, JIS B8243, adaptable to the needs of different regional markets around the world.
• Qualification Certifications: ISO 9001:2015 Quality Management System Certification, ASME "U" Stamp Certification, Food Contact Stainless Steel Material Certification.

• Food Industry: Small and medium-sized high-pressure juice sterilization tanks, dairy aseptic storage tanks, meeting hygienic requirements and ensuring food safety.
• Pharmaceutical Field: High-pressure storage tanks for medicinal liquids, aseptic intermediate reaction vessels, with no risk of material contamination, adapting to GMP production environments.
• Fine Chemical Industry: Small and medium-sized high-pressure solvent storage tanks, precision reagent reaction vessels, resistant to corrosion by organic media, ensuring medium purity.
• Water Treatment: Pressure-bearing components of high-pressure reverse osmosis equipment, small pure water storage tanks, adapting to high-pressure water treatment working conditions and improving equipment operation stability.

• Wooden Case Packaging: Independent wooden cases for single heads, treated with waterproof and shockproof measures and fumigated, suitable for 450mm diameter specifications, ensuring no damage during transportation.
• Pallet Packaging: Wooden pallets are used for bulk orders, with 10-15 pieces per pallet, facilitating warehouse storage and loading/unloading.
• Custom Packaging: Vacuum packaging (anti-oxidation) or sea freight-specific packaging can be provided on demand, adapting to long-term storage or overseas transportation needs.

• Parameter Customization: Adjust the reduced opening size, surface treatment method and 2:1 aspect ratio details according to customer drawings.
• Sample Service: Provide 3-5 samples for testing and verification, and start mass production after qualification.
• Delivery Cycle: 20 days for standard specifications, 30 days for customized specifications.