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Help CenterCBT3843-1999 Marine Angle Flange Pressure Relief Valve With Mill Test Report
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As a professional manufacturer of industrial valves since 2016, Shanghai Zhibang Valve Manufacture Co., Ltd. specializes in providing reliable fluid control solutions for demanding environments. Our CBT3843-1999 Marine Angle Flange Pressure Relief Valve is engineered specifically to meet the rigorous safety standards of marine and offshore applications, ensuring the protection of critical systems against overpressure conditions. With an annual export value of US$1-1.5 million, we have established a trusted presence in global markets, including North America, Southeast Asia, Europe, and Africa. This valve represents our commitment to combining robust construction with precise engineering, offering shipbuilders, offshore platform operators, and marine engineers a dependable safety component backed by comprehensive documentation and quality assurance.
The CBT3843-1999 standard specifies the technical requirements for marine angle flange pressure relief valves, and our product is designed in full compliance. The angle flange design is particularly advantageous in space-constrained marine piping layouts, allowing for easier installation and maintenance compared to inline valves. Each valve undergoes stringent manufacturing controls under our ISO9001-certified quality management system, ensuring consistent performance and reliability.
Key Technical Features & Advantages:
- Robust Marine-Grade Construction: The valve body and internal components are manufactured from materials selected for superior corrosion resistance and mechanical strength in saltwater environments, such as carbon steel with protective coatings or stainless steel grades like CF8/CF8M.
- Precise Pressure Relief Setting: The valve is factory-set to a specified relief pressure (set pressure) with a tight reseating pressure, minimizing system fluid loss after an overpressure event and ensuring quick return to normal operation.
- Angle Flange Configuration: The 90-degree inlet/outlet orientation with flanged connections simplifies integration into piping elbows or corners, saving valuable space in engine rooms, pump rooms, and other marine compartments.
- Reliable Sealing Performance: Features a metal-to-metal or soft-seated (optional) sealing system that provides a bubble-tight seal under normal operating conditions and allows clean, full-opening discharge when the set pressure is exceeded.
- Blowdown Control: Designed to achieve a controlled blowdown (difference between set pressure and reseating pressure), which is crucial for system stability and preventing rapid cycling of the valve.
- Comprehensive Documentation: Each valve is supplied with a Mill Test Report (MTR) that provides traceable material chemical analysis and mechanical property data, a critical requirement for marine classification society approvals and quality audits.
The valve is available in a range of sizes and pressure ratings to suit various system requirements. Below is a summary of typical specifications:
| Design Standard | CBT3843-1999 (Chinese Marine Standard) |
| Nominal Diameter (DN) | DN25, DN40, DN50, DN65, DN80, DN100, DN125, DN150 (Custom sizes available) |
| Pressure Rating (PN) | PN16, PN25, PN40 (Other ratings customizable) |
| Body Material Options | Carbon Steel (WCB), Stainless Steel (CF8/304, CF8M/316), Duplex Steel (Optional) |
| Flange Standard | GB/T, ANSI B16.5, JIS, DIN (Specify upon inquiry) |
| Media | Sea Water, Fresh Water, Oil, Air, Inert Gases |
| Operating Temperature | -20°C to +200°C (Depending on seat material) |
Benefits for Your Marine Project: By integrating our pressure relief valve, you gain a critical safety device that helps prevent catastrophic equipment failure, protects personnel, and ensures compliance with marine safety regulations. The provision of a Mill Test Report simplifies the documentation process for ship classification societies (like ABS, DNV, LR, BV, etc.) and streamlines your procurement and quality control procedures. Our valves are designed for long service life with minimal maintenance, contributing to lower total cost of ownership for vessel operators.
Shanghai Zhibang's manufacturing expertise is backed by our ISO9001 certification, ensuring every step from material sourcing to final testing adheres to documented quality procedures. Our established logistics network allows us to ship efficiently from major ports including Shanghai, Guangzhou, Hongkong, and Beijing to key global markets. We understand the critical nature of marine safety components and stand behind the performance of our valves. For a reliable, documented, and compliant pressure relief solution for your marine or offshore application, contact us to discuss your specific requirements, request a detailed quotation, or obtain technical support.
Frequently Asked Questions (FAQ):
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Q: What is the significance of the CBT3843-1999 standard for this valve?
A: CBT3843-1999 is a Chinese national marine industry standard that specifies the technical requirements, testing methods, inspection rules, and marking for marine angle flange pressure relief valves. It ensures the valve is designed and manufactured to perform reliably in marine environments. -
Q: Is the Mill Test Report (MTR) provided with every valve?
A: Yes, a comprehensive Mill Test Report is provided as a standard document with each valve. It includes material certificates, chemical composition analysis, and mechanical property test results, which are essential for traceability and classification society approvals. -
Q: Can this valve be used for applications other than marine?
A: While designed to marine standards, its robust construction makes it suitable for other demanding industrial applications involving water, oil, gas, or steam where an angle flange pressure relief valve is required, such as in power plants or certain process industries. -
Q: What flange standards are available?
A: We can manufacture valves with flanges conforming to various standards including GB/T (Chinese), ANSI B16.5 (American), JIS (Japanese), and DIN (German). The required standard should be specified at the time of order. -
Q: How is the set pressure determined and adjusted?
A: The valve is factory-set to your specified relief pressure. The set pressure is a critical parameter and adjustment in the field should be performed by qualified personnel using proper equipment. Some models may feature an adjustable spring for fine-tuning within a range. -
Q: What after-sales support and warranty do you offer?
A: We provide technical support for selection, installation, and troubleshooting. Our valves carry a standard warranty against manufacturing defects. Specific warranty terms and conditions are detailed in our commercial contract. -
Q: Can you provide custom materials or special coatings?
A: Yes, we offer customization options. Materials like duplex stainless steel or special coatings for enhanced corrosion protection (e.g., epoxy coating) can be arranged based on your application needs and upon request. -
Q: What is the typical lead time for an order?
A: Lead time depends on the order quantity, specifications, and material availability. Standard configurations typically have shorter lead times. We provide an estimated delivery schedule upon order confirmation.
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