Henan Guojiang is a leading domestic manufacturer of precision pressure vessel components, with over 12 years of experience in R&D, production and customization of dished heads. Its products are exported to more than 10 countries and recognized by customers. In the field of special heads for small and medium-sized equipment, it consistently adheres to high standards of reliability and precision, accurately meeting the rigorous operational requirements of global small and medium-sized fluid equipment.

• Inner Diameter: 450mm, customized for storage tanks of small and medium-sized fluid equipment, perfectly matching the tank structure for storage and transmission of media such as water and chemical solutions.
• Specification: 450×2.5, designed based on the low-pressure working conditions (0.1MPa-0.6MPa) and medium circulation characteristics, with thickness adapting to the pressure-bearing needs of light-duty equipment.
• Material: S30408 stainless steel (equivalent to 304 stainless steel), containing 18% chromium and 8% nickel, featuring excellent corrosion resistance in acid-base medium environments without impurity precipitation.

• Enhanced Sealing: The necked-in design ensures a tighter connection with the tank body, reducing the risk of medium leakage and adapting to the sealing requirements under low-pressure working conditions;
• Optimized Flow Guidance: The necked-in shape guides the smooth flow of media, avoiding residue accumulation and improving equipment operational efficiency;
• Easy Assembly: Precise necked-in dimensions facilitate quick docking with pipelines and valves, reducing installation difficulty and improving assembly accuracy;
• Compact Structure: Compared with ordinary heads, the necked-in design saves installation space, adapting to the compact layout needs of small and medium-sized equipment.

Adopts cold pressing forming technology, avoiding high-temperature damage to the corrosion resistance of the material. Ensures the head maintains stable structural rigidity and sealing performance when in long-term contact with various media, with a smooth surface free of cracks and wrinkles.

• Inspection Protocols: 100% full inspection, including Ultrasonic Testing (UT), Liquid Penetrant Testing (PT) and dimensional accuracy testing, eliminating defective products;
• Applicable Standards: Compliant with GB/T 25198-2010, ASME BPVC Sec.VIII Div 1 and ISO 13445;
• Certifications: Holds ISO 9001:2015, ISO 14001:2015 certifications and ASME "U" Stamp approval, with traceable and compliant quality.

As a core component of small and medium-sized fluid equipment, the necked-in design makes it more suitable for:

• Small-scale industrial wastewater filtration equipment
• Commercial drinking water purification equipment
• Laboratory precision filtration equipment for chemical solutions
• Small-scale food and beverage processing filtration tanks
• Small-scale purified water storage equipment in the pharmaceutical industry

• Packaging: Uses export-grade fumigated wooden crates with shock-absorbing foam and moisture-proof membranes inside, ensuring no damage or moisture during transportation;
• Customization Services: Supports customization of inner diameter from 76mm to 10000mm and thickness from 2mm to 300mm. The size and angle of the necked-in part can be adjusted according to equipment requirements to adapt to different scenarios.

• Strong Corrosion Resistance: S30408 material is suitable for various acid-base media, extending equipment service life;
• Hygiene Compliance: Surface roughness Ra ≤ 0.8μm, meeting food-grade and industrial-grade hygiene standards;
• High Cost-Efficiency: Optimized design of 2.5mm thin specification reduces material consumption and equipment manufacturing costs;
• Wide Compatibility: Compatible with mainstream domestic and foreign small and medium-sized fluid equipment models, and the necked-in structure adapts to multi-scenario installation needs.