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Help CenterCryogenic Service Marine Gate Valve, ASTM A182 F51/F55 Duplex Stainless Steel
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As a professional manufacturer with a strong track record in the global valve market, Shanghai Zhibang Valve Manufacture Co., Ltd. proudly presents our specialized Cryogenic Service Marine Gate Valve. Engineered for the most demanding low-temperature applications in marine and offshore environments, this valve is constructed from premium ASTM A182 F51/F55 Duplex Stainless Steel, offering an exceptional balance of high strength and superior corrosion resistance. Since our establishment in 2016, we have dedicated ourselves to producing reliable flow control solutions, exporting to key markets worldwide from our strategic ports. This valve is designed to ensure safe, leak-tight isolation in cryogenic systems, providing our clients with durability and performance that withstands the harsh conditions of LNG transportation, offshore platforms, and chemical tankers.
Our Cryogenic Marine Gate Valve is meticulously crafted to meet the rigorous standards required for operations at extremely low temperatures. The core advantages and technical specifications are detailed below:
- Superior Material Performance: The use of Duplex Stainless Steel (F51/F55) provides excellent resistance to stress corrosion cracking, pitting, and crevice corrosion, which are critical in chloride-rich marine atmospheres. Its high mechanical strength allows for a more compact and lighter valve design compared to alternatives.
- Reliable Cryogenic Sealing: The valve features a specially designed stem packing and seating surfaces that maintain elasticity and sealing integrity even at temperatures as low as -196°C (-320°F), preventing fugitive emissions.
- Extended Service Life: Components are selected and treated for cryogenic service, including extended bonnets to isolate the packing from extreme cold, preventing stem packing freeze and ensuring smooth operation.
- Versatile Actuation Options: Available in manual handwheel, bevel gear, or pneumatic/electric actuation packages, providing flexibility for different levels of automation and accessibility onboard vessels.
- Robust Construction: The body, bonnet, wedge, and stem are all manufactured from cryogenic-grade materials, undergoing strict Charpy V-Notch impact testing to guarantee toughness at low temperatures.
The technical specifications for common models are outlined in the following table:
| Parameter | Specification |
|---|---|
| Design Standard | API 600, API 6D, BS 1873, ISO 15761 |
| Pressure Class | Class 150 to Class 2500 (ASME) |
| Size Range | DN50 (2") to DN600 (24") |
| Temperature Range | -196°C to +100°C (-320°F to +212°F) |
| Seat & Seal | Stellite hard-faced or equivalent; Graphite packing |
| End Connection | RF, RTJ, BW (Flanged per ASME B16.5) |
| Leakage Class | API 598 / ISO 5208 Rate A (Metal-seated) |
Choosing our valve provides tangible benefits for your operations:
- Enhanced Safety: Reliable shut-off minimizes the risk of leakage in hazardous cryogenic fluid handling.
- Reduced Maintenance: The corrosion-resistant Duplex Steel construction significantly lowers lifetime maintenance costs and downtime.
- Operational Efficiency: Smooth, low-torque operation reduces the effort required for valve cycling, improving crew efficiency.
- Global Compliance: Valves can be manufactured to meet specific regional standards required for your target markets.
Backed by our ISO9001 certified quality management system, every Cryogenic Marine Gate Valve undergoes rigorous testing—including shell tests, seat tests, and cryogenic performance validation—before shipment. With an annual export value demonstrating our global reach and reliability, and serving diverse markets from North America and Europe to Southeast Asia and Africa, Shanghai Zhibang has built a reputation for delivering high-performance industrial valves. Our strategic location and multiple port options ensure efficient and flexible logistics. For your next marine or offshore project requiring dependable cryogenic isolation, our valve offers a proven combination of material excellence, specialized design, and manufacturer reliability. Contact us today for a detailed quotation or to discuss your specific application requirements.
Frequently Asked Questions (FAQ):
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What is the main advantage of Duplex Stainless Steel (F51/F55) for cryogenic valves?
Duplex Stainless Steel offers approximately twice the yield strength of standard austenitic stainless steels (like 316L) with excellent toughness at low temperatures. This allows for thinner, lighter valve sections without sacrificing pressure integrity, while providing superior resistance to chloride-induced corrosion common in marine settings. -
Can this valve be used for LNG service?
Yes, this valve is specifically designed for cryogenic services including LNG (Liquefied Natural Gas), which is typically stored at around -162°C. The materials and design are suitable for such applications, but the final selection should be confirmed based on the specific fluid composition, pressure, and temperature. -
What types of actuation are available?
We offer multiple actuation options: manual operation via handwheel or gearbox for accessible locations, and automated operation using pneumatic (air), hydraulic, or electric actuators. The choice depends on your system's automation needs, available power sources, and frequency of operation. -
Do you provide fire-safe certified versions?
Fire-safe design compliant with API 607 or API 6FA standards is available as an optional feature. This includes secondary metal sealing that maintains a seal in the event of a fire that destroys the primary soft seals. -
What documentation and testing reports accompany the valves?
Standard documentation includes a material test report (MTR), certificate of conformity, and a detailed inspection report. Optional documentation like a full traceability report, NDE reports (UT, RT, PT), and cryogenic test certificates can be provided upon request. -
How do you ensure performance at cryogenic temperatures?
Critical components are subjected to Charpy V-Notch impact testing at the designated low temperature to verify sufficient toughness. Assembly and testing are often performed in a controlled, chilled environment, and the stem packing system is designed to remain functional under thermal contraction. -
What is the typical delivery lead time?
Lead times vary based on size, pressure class, and customization. For standard sizes and classes, typical lead times range from 8 to 12 weeks. We recommend contacting our sales team with your specific requirements for an accurate timeline. -
Can you manufacture valves to other material grades or standards?
Yes, as a manufacturer, we have the capability to produce valves using other cryogenic materials like ASTM A352 LCB/LC1 for lower temperatures or stainless steel 316L, and to other international standards such as DIN, JIS, BS, or GOST, based on customer specifications.
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