S30408 Elliptical Dished Head with Reduced Opening Inner Diameter 450mm, Thickness 2.5mm

1. Basic Information

(1) Core Specifications

· Model Parameters: Elliptical dished head with reduced opening EHA 450×2.5 (material: S30408), featuring excellent corrosion resistance and structural stability, suitable for small and medium-sized pressure-bearing equipment.

· Dimension Details: Standard inner diameter 450mm, meeting the needs of storage tanks and pressure vessels in food, pharmaceutical, and small chemical equipment; the reduced opening size supports customisation from 30mm to 150mm, suitable for the installation of pipes, valves, and inspection ports. After CNC machining, the concentricity tolerance of the reduced opening is ≤ ±0.5mm, ensuring precise connection with other components; the diameter tolerance is controlled within ≤ ±1mm through precision cutting, meeting the assembly standards of small and medium-sized pressure-bearing equipment.

· Thickness Characteristics: Nominal thickness 2.5mm, ensuring structural strength under lightweight design, suitable for working pressures of 0.1MPa-6MPa, applicable to small storage tanks, low-pressure reaction vessels and other scenarios; relying on high-quality S30408 base material, the thickness deviation is ≤ 0.2mm, avoiding stress concentration caused by uneven thickness and extending the service life of equipment.

(2) Material Advantages

Adopting S30408 stainless steel (food-grade certified material), it has excellent corrosion resistance at room temperature, can resist corrosion from the atmosphere and weak acid-base media, and has no risk of heavy metal precipitation, meeting 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.

2. Core Highlights

1. Hygienic Grade Performance: S30408 material meets food-grade and pharmaceutical-grade hygiene requirements, with easy-to-clean surface and no risk of medium residue, suitable for scenarios involving food raw materials and liquid medicines.

2. Integrated Reduced Opening Design: The integrated reduced opening eliminates the need for secondary welding of pipe connections, reducing leakage risks, simplifying the assembly process of small equipment, and avoiding structural damage to the head caused by welding stress, improving pressure-bearing safety.

3. Lightweight Adaptability: The 2.5mm thin specification design combined with the characteristics of S30408 material reduces weight by about 40% compared with carbon steel heads of the same size, facilitating transportation and installation of small equipment and reducing the overall load-bearing of the equipment.

3. Forming and Surface Treatment

(1) Forming Process

Cold forming process (dedicated for 2.5mm thick S30408 plates) is adopted, with precise pressure control through a 500-ton hydraulic press, avoiding changes in material properties caused by hot working. The surface of the formed head is smooth, without defects such as cracks and wrinkles, ensuring structural integrity.

(2) Surface Treatment

· Chemical Polishing: Achieves a surface roughness of Ra ≤ 1.6μm, reducing medium adhesion, meeting hygienic cleaning requirements, suitable for food and pharmaceutical equipment.

· Passivation Treatment: Strengthens the surface oxide film, improving resistance to weak acids and alkalis, suitable for small chemical and water treatment 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.

4. Inspection and Certification

(1) Inspection Standards

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.

2. Penetrant Testing (PT): Detects surface and near-surface cracks and pinholes to prevent medium leakage.

3. Dimensional Inspection: Uses high-precision callipers and coordinate measuring machines to verify diameter, thickness and reduced opening size, ensuring compliance with design requirements.

4. Pressure Testing: Sampling pressure tests of 1.5 times the rated pressure are conducted to verify pressure-bearing capacity and sealing performance.

5. Visual Inspection: Checks for surface scratches and dents to ensure a flat and flawless appearance.

(2) Certification Compliance

· Applicable Standards: ASME BPVC Sec.VIII Div 1, PED 2014/68/EU, GB/T 25198-2010, JIS B8243 (adaptable to different regional markets).

· Qualification Certifications: ISO 9001:2015 Quality Management System Certification, ASME "U" Stamp Certification, Food Contact Stainless Steel Material Certification.

5. Application Scenarios

· Food Industry: Small storage tanks for fruit juice, dairy products and edible oil, meeting hygienic requirements and facilitating cleaning and maintenance.

· Pharmaceutical Field: Small storage containers for medicinal liquids and intermediates, no risk of material contamination, suitable for hygienic production environments.

· Small Chemical Industry: Low-pressure solvent storage tanks and reagent storage containers, resistant to weak corrosion, ensuring medium purity.

· Water Treatment: Pressure-bearing components of small pressure filters and household water purification equipment, suitable for water environment use.

6. Packaging and Services

(1) Packaging Solutions

· Wooden Case Packaging: Independent wooden cases for single heads (waterproof, shockproof, fumigated), suitable for 450mm diameter specifications, ensuring no damage during transportation.

· Pallet Packaging: Wooden pallets for bulk orders (15-20 pieces per pallet), facilitating warehouse storage and loading/unloading.

· Custom Packaging: Vacuum packaging (anti-oxidation) can be provided on demand, suitable for long-term storage or overseas transportation.

(2) Customisation Services

· Parameter Customisation: Adjustment of reduced opening size and surface treatment methods according to customer drawings.

· Sample Service: 3-5 samples provided for testing and verification, with mass production starting after qualification.

· Delivery Cycle: 15 days for standard specifications, 25 days for customised specifications.