2205 Duplex Steel 1010×5 Stainless Steel 2:1 Ellipsoidal ASME Dished Heads

Henan Guojiang, a senior manufacturer in China's precision pressure vessel components sector, has over 12 years of experience in R&D, production and customisation of dished heads, with products covering more than 10 countries worldwide. In the niche field of duplex steel dished heads, it has always taken ASME standards as the core, strictly controlling product precision and performance to meet the equipment usage needs under high-pressure and strong corrosion working conditions.

• Dimension Specification: 1010×5 (inner diameter 1010mm, thickness 5mm), suitable for medium and large pressure vessels, and can match the structure of storage tanks and reaction equipment in petrochemical, marine engineering and other fields.
• Material Characteristics: 2205 duplex steel, containing 22% chromium, 5% nickel and 3% molybdenum, which combines the toughness of austenitic steel and the strength of ferritic steel, with chloride corrosion resistance far exceeding that of ordinary stainless steel.
• Executive Standard: Fully compliant with ASME BPVC Sec.VIII Div 1, ensuring the structural safety of the product under high-pressure (1.0MPa-2.5MPa) working conditions.

The combined process of "cold press forming + low-temperature solution treatment" is adopted, which is the core processing scheme for this 2:1 ellipsoidal dished head. Cold press forming ensures the dimensional accuracy of the dished head, while low-temperature solution treatment optimises the metallographic structure of 2205 duplex steel, avoiding material performance degradation caused by high temperature. This ensures that the dish head still maintains good sealing and structural stability when bearing high pressure and corrosive media for a long time.

• Inspection Process: 100% full inspection, including ultrasonic testing (UT), liquid penetrant testing (PT), mechanical property testing (tensile and impact tests) and duplex steel phase ratio testing, to fully check product defects.
• Applicable Standards: In addition to ASME BPVC Sec.VIII Div 1, it also complies with GB/T 25198-2010 and ASTM A815 standards, adapting to equipment specifications in multiple industries at home and abroad.
• Certification Qualifications: Holds ISO 9001:2015, ISO 14001:2015 certifications and ASME "U" Stamp, and the products can be directly used in export projects.

As a high-pressure and corrosion-resistant dished head, this product is mainly used in:

• Petrochemical high-pressure reactors
• Seawater treatment equipment on offshore platforms
• Onshore oil and gas transmission pipeline storage tanks

• Packaging Scheme: Export-grade fumigated wooden crates are used, with customised shock-absorbing foam grooves inside and waterproof PE film wrapped outside, suitable for long-distance sea and land transportation, avoiding collision damage during transportation.
• Customisation Services: Supports customisation of 2205 duplex steel dished heads with an inner diameter of 300mm-8000mm and a thickness of 3mm-50mm, and the curvature and flange size of the dished head can be adjusted according to the equipment interface shape.

• Strong Corrosion Resistance: 2205 duplex steel material can resist high-salt and high-chloride media, suitable for harsh environments such as marine and chemical industries, and the equipment maintenance cycle is extended by more than 50%.
• High-Pressure Adaptability: The 5mm thickness and ASME standard design can withstand high pressure of 1.0MPa-2.5MPa, meeting the pressure-bearing needs of medium and large pressure vessels.
• Excellent Structural Stability: The 2:1 elliptical structure design disperses the pressure load during equipment operation, reduces local stress concentration, and lowers the risk of dished head deformation.
• Global Adaptability: Compliant with ASME and other international standards, it can be used in overseas projects without secondary certification, adapting to the equipment procurement needs of multinational enterprises.