Shanxi Xinshunda Flange Manufacturing Co., Ltd. delivers the Class 300 Orifice Flange, a specialized piping component designed for accurate flow measurement in moderate to high-pressure industrial systems. Bridging the gap between standard low-pressure metering and extreme high-pressure applications, the Class 300 Orifice Flange offers superior structural integrity for processes operating up to approximately 740 psi (at ambient temperature for Carbon Steel). With nearly two decades of precision forging and machining expertise, we manufacture these critical components to ensure leak-tight performance and metrological accuracy in custody transfer and process control applications globally.
Advanced Design Features for Operational Efficiency
The Class 300 Orifice Flange is engineered as a matched pair (typically Hub-to-Hub or Hub-to-Slip On) with distinct features that differentiate it from standard flanges, facilitating safe and efficient orifice plate handling:
- Precision Orifice Taps: Each Class 300 Orifice Flange is drilled and tapped (usually 1/2" NPT) at standardized locations such as Flange Taps (1 inch upstream and downstream from the plate face) or D and D/2 taps. These are machined with high precision to ensure accurate differential pressure transmission to transmitters.
- Integrated Jack Screws: A defining feature of our Class 300 Orifice Flange is the inclusion of jacking screws. These allow operators to safely separate the flange faces by a controlled margin, enabling the insertion or removal of the orifice plate without prying, which protects the sealing surfaces and prevents gasket damage.
- Vent and Drain Options: To support maintenance and calibration, we can equip the Class 300 Orifice Flange with additional vent and drain connections, allowing for the purging of trapped gases or liquids from the meter run.
- Sealing Surfaces: While Raised Face (RF) is standard, we also offer Ring Type Joint (RTJ) configurations for the Class 300 Orifice Flange when dealing with hazardous, toxic, or high-temperature fluids requiring metal-to-metal sealing. The bore is machined to strict tolerances to ensure the orifice plate remains perfectly concentric with the flow stream.
We produce these flanges in a wide range of materials including Carbon Steel (A105), Stainless Steel (A182 F304/F316/F316L/F321), Duplex/Super Duplex, and Alloy Steels (F11, F22), ensuring compatibility with corrosive and high-temperature media.
Strategic Applications in Critical Industries
The Class 300 Orifice Flange is the industry standard for flow measurement in sectors where operating pressures exceed Class 150 limits but do not require the massive wall thickness of Class 600 or higher.
- Oil & Gas Midstream: Extensively used in natural gas transmission lines, compressor station discharge lines, and crude oil gathering systems where pressures frequently range between 300 and 700 psi.
- Petrochemical Refining: Essential for measuring feedstocks and products in catalytic cracking units, reformer lines, and high-pressure steam headers within refineries.
- Chemical Processing: Ideal for high-pressure reactor feeds, ammonia synthesis loops, and polymerization processes involving aggressive chemicals at elevated pressures.
- Power Generation: Deployed in high-pressure boiler feedwater lines, main steam extraction points, and turbine bypass systems.
- Offshore Platforms: Due to space constraints and high operating pressures, the compact yet robust design of the Class 300 Orifice Flange makes it a preferred choice for offshore production manifolds and separation units.
Rigorous Quality Assurance for Measurement Accuracy
In flow measurement, the physical dimensions of the Class 300 Orifice Flange directly impact the accuracy of the reading. Shanxi Xinshunda adheres to ASME B16.36, API MPMS Chapter 14.3, and ISO 5167 standards.
- Tap Geometry Verification: We utilize CNC drilling centers with optical alignment to ensure orifice taps are perfectly perpendicular to the bore and located at exact distances, eliminating pressure signal errors.
- Face Flatness & Finish: The sealing faces are machined to a precise serrated finish (125-250 µin Ra) and checked for flatness to prevent leaks under Class 300 pressure loads.
- Concentricity Control: Using advanced Coordinate Measuring Machines (CMM), we verify that the internal bore, bolt circle, and outer hub are perfectly concentric, ensuring a symmetrical flow profile around the orifice plate.
- Comprehensive Testing: Every Class 300 Orifice Flange undergoes hydrostatic testing, Positive Material Identification (PMI), and Non-Destructive Testing (UT/MT/PT) as required. Full traceability is provided via EN 10204 3.1/3.2 Mill Test Certificates.
Specialized Packaging and Global Logistics
To preserve the precision-machined faces and threaded taps of the Class 300 Orifice Flange, we employ protective shipping protocols. Flange pairs are often shipped pre-assembled with a temporary spacer to maintain alignment and protect the raised faces. Threads are capped, and units are coated with anti-corrosive preservatives, wrapped in VCI paper, and secured in reinforced wooden crates suitable for ocean freight. We provide complete documentation packages, including dimensional inspection reports, tap location certificates, and material traceability records, ensuring smooth customs clearance and installation worldwide.
Partner with Shanxi Xinshunda for Reliable Metering
Choosing Shanxi Xinshunda for your Class 300 Orifice Flange requirements guarantees a product built on 19 years of manufacturing excellence. We offer custom configurations, including special tap orientations, exotic alloys for sour service (NACE MR0175 compliant), and rapid turnaround for project needs. Our engineering team is ready to assist in selecting the optimal flange type and material for your specific pressure-temperature profile. Trust us to deliver Class 300 Orifice Flanges that ensure the accuracy, safety, and efficiency of your flow measurement systems. Contact our sales department today for technical data sheets and competitive quotations.
Why Partner with Shanxi Xinshunda?
Choosing Shanxi Xinshunda for your Class 300 Orifice Flange requirements guarantees a product built on 19 years of manufacturing excellence. We offer custom configurations, including special tap orientations, exotic alloys for sour service (NACE MR0175 compliant), and rapid turnaround for project needs. Our engineering team is ready to assist in selecting the optimal flange type and material for your specific pressure-temperature profile. Trust us to deliver Class 300 Orifice Flanges that ensure the accuracy, safety, and efficiency of your flow measurement systems. Contact our sales department today for technical data sheets and competitive quotations.
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