Product Specification

Aluminum Dished Head with Reduced Opening (600mm Diameter, 5mm Thickness) - Product Description

Aluminum Dished Head with Reduced Opening EHA600X5 (Aluminum Alloy 6061/5052) - Lightweight & Corrosion-Resistant, Engineered for Versatile Industrial Applications

Brand Name

GuoJiang

As a leading specialist in head manufacturing, Guojiang boasts over 12 years of expertise in the R&D, production, and customization of various heads. Our customer network spans more than 10 countries worldwide, delivering reliable products tailored to diverse industrial needs.

Diameter & Reduced Opening Details

• Standard Diameter: 600mm (inner diameter), perfectly compatible with medium-sized tanks, containers, and pressure equipment commonly used in chemical, pharmaceutical, and new energy sectors.

• Reduced Opening Design: Customizable opening size (ranging from 50mm to 200mm, based on customer requirements) to fit pipes, valves, or inspection ports. Our advanced CNC machining ensures the opening’s concentricity tolerance ≤ ±0.5mm, guaranteeing seamless assembly with other components.

• Diameter Tolerance: Controlled within ≤ ±1mm through precision cutting technology, meeting strict assembly standards for pressure-bearing equipment.

Thickness Specification

• Nominal Thickness: 5mm, optimized for lightweight performance while maintaining structural stability. This thickness is ideal for working pressures between 0.1MPa and 10MPa, suitable for non-high-pressure scenarios such as storage tanks and low-pressure reactors.

• Thickness Uniformity: Utilizing high-quality aluminum base materials, the thickness variation is kept ≤ 0.3mm. This avoids stress concentration caused by uneven thickness, enhancing the overall safety and service life of the product.

Material Options

Focusing on aluminum and aluminum alloy materials, we offer:

• Aluminum Alloys: 6061 (high strength, good weldability, suitable for structural parts), 5052 (excellent corrosion resistance, ideal for chemical and marine environments)

• Other Optional Materials (for custom orders):

Carbon Steel (Q235B, Q345R)

Stainless Steel (SUS304, SUS316L)

Duplex Steel (S31803)

All aluminum materials are sourced from certified suppliers (e.g., Chinalco, Alcoa) with complete Material Test Certificates (MTC) provided to ensure traceability and quality.

Key Features

As a critical component for pressure vessels and storage equipment, this aluminum dished head stands out with exceptional performance:

• Lightweight Advantage: Compared to stainless steel or carbon steel heads of the same size, aluminum heads reduce the overall weight of equipment by 30%-50%, facilitating transportation, installation, and reducing structural load.

• Superior Corrosion Resistance: The natural oxide film on the aluminum surface provides excellent resistance to atmospheric corrosion, weak acids, and alkalis. It is especially suitable for applications involving aqueous solutions, food-grade media, and chemical reagents without causing medium contamination.

• Reduced Opening Functionality: The integrated reduced opening eliminates the need for secondary welding of pipe connections, reducing potential leakage points and simplifying the equipment assembly process. It also enhances the structural integrity of the head by avoiding weld-induced stress.

Forming & Surface Treatment

Forming Methods

1. Cold Forming: The preferred method for 5mm thin aluminum sheets. It avoids thermal deformation and maintains the material’s mechanical properties. We use 8+ 800-ton hydraulic presses with precise pressure control to ensure consistent forming quality. The forming process achieves a smooth surface without cracks or wrinkles.

2. Hot Forming (for thick aluminum materials ≥10mm or high-strength alloys): Heating temperature is precisely controlled between 350°C - 500°C (adjusted based on alloy type). Post-forming, stress relief annealing is performed to reduce internal stress and improve dimensional stability.

Surface Treatment

• Chemical Polishing: Achieves a smooth surface with roughness Ra ≤ 1.6μm, reducing medium adhesion and facilitating cleaning. Suitable for food and pharmaceutical applications.

• Anodizing: Forms a hard, wear-resistant oxide layer on the surface, enhancing corrosion resistance and providing a decorative finish (available in silver, black, or custom colors).

• Passivation: For aluminum alloys used in chemical environments, passivation treatment further strengthens the surface oxide film, improving resistance to harsh media.

• Anti-Rust Coating: Food-grade anti-rust oil or film can be applied for storage and transportation, preventing oxidation during transit.

• Custom Surface Finishes: Mirror polishing (Ra ≤ 0.8μm) or sandblasting (Ra 1.6μm - 3.2μm) available upon request for specific hygiene or aesthetic requirements.

Inspection Standards

To ensure product quality and safety, we implement strict inspection procedures covering all production stages:

• Ultrasonic Testing (UT): 100% coverage of the head body to detect internal defects such as inclusions or voids, ensuring no hidden structural issues.

• Liquid Penetrant Testing (PT): For non-ferrous aluminum materials, it effectively detects surface and near-surface defects (e.g., cracks, pinholes) to prevent leakage.

• Dimensional Inspection: Using high-precision calipers and coordinate measuring machines (CMM), key dimensions (diameter, thickness, opening size) are inspected to meet design specifications.

• Pressure Testing: Sampling pressure tests (up to 1.5 times the rated working pressure) are conducted to verify the head’s pressure-bearing capacity and sealing performance.

• Visual Inspection: Checks for surface defects such as scratches, dents, or unevenness, ensuring a smooth and flawless appearance.

Certifications & Applications

Applicable Standards

• ASME BPVC Sec.VIII Div.1 (for North American and global markets)

• PED 2014/68/EU (CE certification for European markets)

• GB/T 25198-2010 (Chinese national standard)

• JIS B8243 (customizable for Japanese market requirements)

Certifications

• ISO 9001:2015 Quality Management System Certification

• ASME "U" Stamp (for pressure vessel components)

• PED Module H Certificate

Applications

This aluminum dished head with a reduced opening is widely used in various industries:

• Food & Beverage: Storage tanks for juices, dairy products, and edible oils (corrosion-resistant, non-toxic, easy to clean)

• Chemical Industry: Low-pressure reactors, solvent storage tanks, and chemical transport containers

• New Energy: Battery electrolyte storage tanks, hydrogen fuel cell auxiliary equipment

• Pharmaceuticals: Sanitary storage tanks for medicinal liquids and intermediates

• Water Treatment: Pressure filters, water storage tanks

Our aluminum heads for food-grade storage equipment hold a significant market share in China, with products exported to Europe, North America, and Southeast Asia.

Packaging & Services

Packaging Options

• Wooden Cases: For small or precision heads (600mm diameter included). The cases are waterproof, shockproof, and fumigated to meet international export standards, preventing damage during long-distance shipping.

• Wooden Pallets: Suitable for bulk orders. Each pallet can load up to 8-10 heads (depending on size) and is stackable for efficient warehouse storage.

• Steel Pallets: For heavy-duty or long-term storage. Corrosion-resistant and reusable, ideal for heads that require extended protection.

• Custom Packaging: Vacuum packaging (to prevent oxidation) or seaworthy packaging (for overseas shipping) available based on customer needs. All packaging undergoes drop, vibration, and compression tests to ensure product safety.

Customized Services

• Full Customization: Tailor-made solutions for diameter, thickness, opening size, material, and surface treatment based on customer drawings or specifications.

• Sample Service: Small-batch samples (3-5 pieces) provided for testing and verification before mass production.

• Quick Turnaround: Standard 600mm diameter heads with 5mm thickness are manufactured within 20 days; customized heads are manufactured within 30 days.