Welded Globe Valve DN50 Price, High Pressure Steam Pipeline
Factors Affecting the Price of Welded Globe Valve DN50
Currently, the price of a welded globe valve DN50 suitable for high-pressure steam pipelines generally ranges from RMB 1,500 to RMB 5,500. The specific price is influenced by the following factors:
Valve Body Material: Chrome-molybdenum steel (WC6/WC9) costs approximately RMB 1,500-2,800, suitable for temperatures up to 540°C; high-temperature alloy steel costs RMB 3,500-4,500; stainless steel (304/316) costs RMB 2,000-3,500.The main stop valve product names of China Stop Valve Network include:ANSI Flange Straight-through Bellows Globe Valve,Forged Steel Straight-through Globe Valve,Flange Straight-through Low Temperature Globe Valve,High Temperature and Pressure Power Station Electric Globe Valve,Oxygen-specific Globe Valve,Vacuum Isolated Straight-through Globe Valve,Y-type Jacket Insulation Globe Valve,GB Bellows Globe Valve.
Seal Type: STL hardfaced alloy sealing surface offers erosion resistance and high temperature resistance, with a price approximately 30%-50% higher than conventional flexible graphite seals.
Welding Connection Method: Butt weld (BW) offers high structural strength and no leakage points, with a slightly higher price than socket weld (SW), though the overall difference is 10%-15%.
Actuation Method: Manual (handwheel/bevel gear) is the basic configuration (RMB 1,500-2,800); pneumatic or electric actuator configurations can increase the total price by 60%-100%.
Core Requirements for High Pressure Steam Pipelines
The welded connection completely eliminates the risk of gasket leakage due to high-temperature aging associated with flanged connections. The disc and seat are hardfaced with STL hard alloy to withstand long-term erosion and high-temperature oxidation from high-pressure steam. The valve body must pass corresponding pressure rating certifications (Class 600/900 or PN63/PN100), with a shell test pressure of 1.5 times the nominal pressure, ensuring structural integrity under high temperature and high pressure.
Purchasing Suggestions
It is recommended that users request material certificates, pressure test reports, and hardfacing procedure qualification reports from suppliers. Provide steam temperature, working pressure, and opening/closing frequency parameters. When purchasing, confirm that the valve complies with JB/T 7747 or GB/T 12235 standards. Give preference to products with integrally forged or precision cast valve bodies, and request quotes from at least three professional high-temperature and high-pressure valve manufacturers for comparison.
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