Among the various options available on the market, the Chrome-Molybdenum steel high temperature globe valve stands out for its durability and performance in extreme conditions. This article provides a comprehensive analysis of the Chrome-Molybdenum Steel High Temperature Globe Valve DN65, specifically focusing on models designed for a service temperature of 550℃, including its pricing factors, material properties, and application scenarios.The main pressure reducing valve product names of China Pressure Reducing Valve Network include:Internal Thread High Sensitivity Steam Reducing Valve,Internal Thread Piston Steam Reducing Valve,Internal Thread Bigger diaphragm-Type HighSensitivity Reducing Valve,Tunable Pressure-reducing-and-maintaining Valve,YB Series Pressure-Reducing-Aad-Maintaining Valve,Y416X Type Direct-acting Spring diaphragm Reducing Valve,Corrugated Pipe Type Reducing Valve,Features And Functions Of Corrugated Pipe Reducing Valve,GAS Reducing Valve.

Understanding the Chrome-Molybdenum (Cr-Mo) Material

Chrome-Molybdenum steel, often referred to as Cr-Mo steel, is an alloy consisting of chromium (Cr), molybdenum (Mo), iron (Fe), and carbon (C) . The combination of these elements provides exceptional mechanical properties that are essential for industrial applications. Chromium plays a vital role in providing oxidation resistance and corrosion resistance by forming a protective layer on the steel's surface. In contrast, Molybdenum enhances the steel's thermal strength, hardness, and creep resistance at elevated temperatures .

For valves used in power plants and petrochemical facilities, the material's ability to maintain structural integrity under heat is paramount. The Cr-Mo alloy offers good quenching properties, excellent weldability, and remarkable shock absorption, making it a reliable choice for severe service conditions .

Why DN65 and 550℃ Specifics

The designation "DN65" refers to the nominal diameter of the valve, indicating a standard pipe size that is commonly used in industrial pipelines. For a valve to be certified for a temperature resistance of 550℃, it must be constructed from specific grades of Chrome-Molybdenum steel. According to industry standards and engineering practices, this temperature requirement aligns with materials such as 15CrMo, which is rated for service up to 550℃, and WC6 (1.25% Chromium, 0.5% Molybdenum) which can withstand temperatures up to 593℃ . These materials are classified as low-alloy heat-resistant steels, typically featuring a pearlitic structure that ensures high-temperature strength and resistance to hydrogen attack .

Key Design Features of the Globe Valve

The globe valve design is specifically chosen for applications requiring precise flow regulation and a positive shut-off. The Chrome-Molybdenum Steel High Temperature Globe Valve DN65 typically features a robust construction that includes:

High-Temperature Integrity: The body and bonnet are cast from Cr-Mo steel to handle the thermal stresses associated with 550℃ operation .

Pressure Handling: While the primary focus is on temperature, these valves are designed to handle significant pressures, often conforming to standards like J61Y for high-pressure steam applications .

Sealing Mechanism: The valve often includes a back-seating structure to prevent leakage along the stem during operation, ensuring safety and reliability in steam and water applications .

Pricing Factors for the Chrome-Molybdenum Steel High Temperature Globe Valve DN65

Determining the exact price for a Chrome-Molybdenum Steel High Temperature Globe Valve DN65 requires a look at the variables that influence the final quotation. Unlike standard carbon steel valves, the cost of Cr-Mo valves is significantly higher due to the material cost and the specialized manufacturing processes required for high-temperature service.

Key factors affecting the price include:

1. Specific Material Grade: The specific grade of Chrome-Molybdenum steel used (e.g., WC6, WC9, or 15CrMo) significantly impacts the cost. Grades with higher Chromium and Molybdenum content generally command a higher price due to superior heat resistance .

2. Manufacturing Standard:Valves manufactured to strict ASTM or ASME standards typically undergo more rigorous testing and quality control, contributing to a higher price point compared to non-certified alternatives .

3. Pressure Rating:The valve's pressure class (e.g., Class 150, Class 300, or higher) affects the wall thickness and overall size, which increases the amount of material used and thus the cost.

4.Market Factors:The price of raw materials like Molybdenum and Chromium fluctuates based on global market supply and demand. This volatility directly influences the manufacturer's pricing .

5.Customization and Operation:The type of actuator (manual handwheel, gear-operated, or pneumatic/electric actuator) adds to the base cost. Additionally, customizations regarding end connections (flanged, butt-weld, or socket-weld) can affect the final price .

It is important to note that prices for an industrial valve of this specification can range significantly. While some sources list prices for DN65 valves in different materials (such as ductile iron) to give a general baseline, the specific Chrome-Molybdenum alloy will cost considerably more due to its advanced metallurgical properties .

Common Applications

Thanks to its ability to withstand temperatures up to 550℃ without losing structural integrity, this globe valve is indispensable in critical sectors. Typical applications include:

Power Generation:Used in boiler feedwater systems, main steam lines, and extraction systems in thermal and nuclear power plants .

Petrochemical and Refining:Ideal for high-temperature pipelines that transport oil, steam, and other hydrocarbons where corrosion resistance is also a necessity .

Industrial Processing:Utilized in high-pressure steam distribution networks and processing plants that operate at elevated temperatures .

Conclusion

The Chrome-Molybdenum Steel High Temperature Globe Valve DN65 is a specialized piece of equipment designed for the most demanding industrial environments. Its ability to maintain performance at 550℃ is not simply a function of the valve design but is inherently tied to the exceptional characteristics of the Chrome-Molybdenum alloy, specifically grades like 15CrMo or WC6 .

When evaluating the price of this valve, it is essential to look beyond the base cost and consider the long-term value it provides through safety, durability, and resistance to thermal degradation. For accurate pricing, it is recommended to contact manufacturers or suppliers directly with detailed specifications regarding your pressure requirements and desired material grade.

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