500L Industrial Storage Heat Water Buffer Expansion Tank
(ASME-Standard Pressure Vessel)
Overview
The 500L Industrial Storage Heat Water Buffer Expansion Tank is a specialized pressure vessel engineered for industrial hot water systems, integrating heat storage, pressure buffering, and thermal expansion compensation functions. Compliant with strict ASME (American Society of Mechanical Engineers) standards and featuring a stainless steel outer shell for enhanced corrosion resistance, it ensures safe, stable operation in high-demand industrial environments-effectively mitigating pressure fluctuations, optimizing energy utilization, and extending the service life of associated hot water equipment.
Core Technical Specifications
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Parameter
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Specification
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Nominal Capacity
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500L (effective volume: 480-490L)
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Design/Working Pressure
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Design: 2.0MPa; Working: 0.6-1.6MPa
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Design/Working Temperature
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Design: 150ºC; Working: -10ºC to 120ºC
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Material
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- Inner Liner: 304/316L stainless steel (corrosion-resistant for hot water contact, food-grade optional)- Outer Shell: 304/316L stainless steel (mirror/powder-coated finish, excellent rust and chemical resistance for harsh industrial environments)- Insulation Layer: 50mm-thick polyurethane foam (thermal conductivity ≤0.024W/(m·K), wrapped in aluminum foil for moisture proofing)
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Pressure Control Element
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Built-in diaphragm-type expansion bladder (EPDM rubber/FKM rubber, compatible with high-temperature hot water and mild chemicals)
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Connection Port
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DN50/DN65 flange (PN1.6MPa, GB/T 9119 standard; customizable to NPT threads per industrial needs)
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ASME Standard Compliance
This pressure vessel strictly adheres to ASME Boiler and Pressure Vessel Code (BPVC) Section VIII, Division 1-the global benchmark for pressure equipment safety. Key compliance features include:
- ASME "U" Stamp Certification: Validates conformance to ASME design, material, and manufacturing requirements, enabling access to North American and international markets.
- Pressure Testing: Undergoes hydrostatic testing at 1.5× design pressure (3.0MPa) and air-tightness testing at 1.1× working pressure (1.76MPa) before delivery.
- Material Traceability: All structural materials (inner/outer stainless steel) come with mill test reports (MTRs) compliant with ASME material standards (SA-240 for 304/316L stainless steel), ensuring full traceability from raw material to finished product.
Core Functional Advantages
- Thermal Expansion Compensation
The integrated EPDM/FKM bladder separates the tank's air chamber from the hot water system. When hot water expands (due to temperature rise), excess water is diverted into the tank, compressing the air chamber to absorb volume changes-preventing system overpressure and avoiding damage to pumps, valves, or pipes.
- Pressure Buffering
Reduces pressure fluctuations caused by intermittent hot water demand (e.g., sudden equipment startup/shutdown). Maintains stable system pressure (±0.05MPa) to ensure consistent water flow and prevent frequent on/off cycling of boilers or heaters, lowering energy waste.
- Efficient Heat Storage
The 500L capacity and high-performance insulation layer enable temporary storage of excess hot water (e.g., during low-demand periods). This stored heat is reused during peak demand, reducing boiler/heater runtime and cutting energy consumption by 8-15%.
- Durable Stainless Steel Construction
Both inner liner and outer shell use 304/316L stainless steel:
- Resists corrosion from industrial humidity, chemical vapors, and accidental water spillage-eliminating rust risks common with carbon steel shells.
- Reduces maintenance needs: No periodic repainting or anti-rust treatments required, extending the tank's service life to 10+ years.
- Suitable for clean environments (e.g., food, pharmaceutical plants) where hygiene and material inertness are critical.
Application Fields
- Industrial HVAC Systems: Buffering and heat storage for central hot water supply in factories, warehouses, or coastal industrial facilities (stainless steel resists saltwater corrosion).
- Food & Beverage Processing: Temperature-stabilized hot water storage for cleaning, sterilization, or production (304/316L inner/outer shell meets FDA/EC 1935/2004 food contact standards).
- Pharmaceutical Industry: Compliant with GMP requirements for hot water systems in drug manufacturing (smooth stainless steel surface, easy to clean and sanitize).
- Chemical Processing Plants: Expansion compensation for hot water systems in corrosive environments (316L outer shell resists acid/alkali fumes).
- Renewable Energy Systems: Heat storage for solar thermal or heat pump-based industrial hot water systems (durable stainless steel withstands outdoor/indoor installation).
Safety & Quality Assurance
- Safety Devices: Equipped with ASME-certified pressure relief valves (set pressure: 1.7MPa), pressure gauges (class 1.6 accuracy), and liquid level switches (to prevent overfilling).
- Quality Warranty: 36-month warranty for stainless steel inner/outer shells (extended due to material durability), 12-month warranty for the expansion bladder and insulation layer.
- Compliance with Additional Standards: Meets ISO 9001 quality management system requirements and GB 150 (China pressure vessel standard) for dual-market compatibility.
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