Shanxi Xinshunda Flange Manufacturing Co., Ltd. manufactures the Class 600 Orifice Flange, a heavy-duty piping component engineered for accurate flow measurement in high-pressure industrial environments. Representing a significant step up in pressure containment from Class 300 and 400, the Class 600 Orifice Flange is designed to withstand operating pressures up to approximately 1,480 psi (at ambient temperature for Carbon Steel) and maintains integrity at elevated temperatures where lower classes would fail. With nearly two decades of specialized forging and precision machining expertise, we deliver these critical metering components to the global oil & gas, petrochemical, and power generation sectors, ensuring safety and accuracy in the most demanding high-pressure applications.
Heavy-Duty Design and Engineering Features
The Class 600 Orifice Flange is built with substantial hub thicknesses and larger bolt diameters to handle the immense mechanical loads associated with high-pressure systems. Our design incorporates specific features to facilitate safe operation and maintenance:
- Reinforced Structure: The massive wall thickness of the Class 600 Orifice Flange requires advanced forging techniques to ensure grain flow continuity and eliminate internal defects. We utilize premium Carbon Steel (A105), Stainless Steel (A182 F304/F316/F316L/F321), Duplex/Super Duplex, and Alloy Steels (F11, F22, F91) to match specific process conditions.
- Precision Orifice Taps: Accurate flow measurement depends on perfect tap geometry. Our Class 600 Orifice Flange sets feature taps (Flange, D, or D/2) drilled with extreme precision into the thick hubs. We employ deep-hole drilling technologies and optical alignment to ensure taps are perfectly perpendicular to the bore, preventing pressure signal distortion.
- High-Load Jack Screws: Separating a Class 600 Orifice Flange pair requires overcoming significant bolt preload and gasket compression. We integrate hardened, high-tensile jack screws directly into the flange hub, allowing operators to safely and evenly separate the faces for orifice plate inspection without prying, which could damage the critical sealing surfaces.
- Sealing Configurations: While Raised Face (RF) is available, the Class 600 Orifice Flange is predominantly supplied with Ring Type Joint (RTJ) grooves (typically R-series, e.g., R45, R46) for high-pressure services. The metal-to-metal seal provided by RTJ gaskets is essential for containing hazardous gases, high-temperature steam, and toxic fluids at these pressure levels.
Critical Applications in High-Pressure Sectors
The Class 600 Orifice Flange is the industry standard for flow measurement in processes where pressures consistently exceed 1,000 psi.
- Upstream Oil & Gas: Essential for wellhead flow lines, Christmas tree assemblies, and high-pressure gathering systems where wellhead pressures can range from 1,000 to 2,000 psi.
- Natural Gas Transmission: Used in mainline transmission pipelines, compressor station discharge headers, and city gate stations operating at high line pressures.
- Petrochemical Refining: Critical for hydrocracking units, hydrotreating reactors, and high-pressure hydrogen recycle loops where pressures often exceed 1,200 psi.
- Power Generation: Deployed in main steam lines of sub-critical and super-critical boilers, high-pressure turbine extraction lines, and boiler feedwater systems.
- Offshore Platforms: Due to the harsh environment and high operating pressures, the robust Class 600 Orifice Flange is a staple on offshore production platforms for separation and injection manifolds.
Rigorous Quality Assurance for High-Stakes Environments
In high-pressure applications, the margin for error is non-existent. Shanxi Xinshunda adheres to ASME B16.36, API MPMS Chapter 14.3, ISO 5167, and NACE MR0175 standards.
- Advanced NDT Protocols: Given the thick cross-sections of the Class 600 Orifice Flange, every unit undergoes comprehensive Ultrasonic Testing (UT) per ASTM A388 to detect internal laminations. Surface defects are identified via Magnetic Particle (MT) and Liquid Penetrant (PT) testing.
- Dimensional Precision: We utilize large-scale Coordinate Measuring Machines (CMM) to verify the concentricity of the bore, the exact location of orifice taps relative to the face, and the depth/angle of RTJ grooves. Even minor deviations can cause leaks or measurement errors at 1,500+ psi.
- Hydrostatic Validation: Each Class 600 Orifice Flange is hydrostatically tested at 1.5 times its rated pressure (approx. 2,220 psi for carbon steel) to prove structural integrity before shipment.
- Material Traceability: Full EN 10204 3.1/3.2 Mill Test Certificates are provided, detailing chemical composition, mechanical properties, and heat treatment records for complete traceability from melt to final product.
Specialized Heavy-Lift Packaging and Logistics
The significant weight and precision nature of the Class 600 Orifice Flange necessitate specialized logistics. We ship flange pairs pre-assembled with heavy-duty spacers to maintain alignment and protect the RTJ grooves or raised faces. Threads are capped, and units are coated with heavy-duty corrosion inhibitors, wrapped in VCI paper, and secured in reinforced, steel-strapped wooden crates designed for ocean freight and heavy-lift handling. Our documentation package includes dimensional reports, NDT certificates, and material traceability records to ensure seamless project integration.
Partner with Shanxi Xinshunda for High-Pressure Reliability
Selecting Shanxi Xinshunda for your Class 600 Orifice Flange requirements means partnering with a manufacturer dedicated to safety and precision in high-stakes environments. We offer custom alloy solutions for sour service, specialized RTJ groove machining, and expert technical support for high-pressure metering skid design. With 19 years of experience serving global energy projects, our Class 600 Orifice Flanges deliver the durability and accuracy required to keep your high-pressure operations running safely and efficiently. Contact our sales team today for technical specifications, catalogs, and competitive pricing.
Hot Tags: class 600 orifice flanges, China class 600 orifice flanges manufacturers, suppliers, factory
