In the high-pressure world of oil, gas, and power generation, connection reliability is non-negotiable. Jiangyin Zhonghai Precision Machinery Co., Ltd. manufactures Class 1500 High-Pressure Flanges in strict accordance with ANSI/ASME B16.5 and B16.47 standards.

Engineered to withstand extreme mechanical stress, our Class 1500 series benefits from our fully integrated Forging-Heat Treatment-Precision Machining production chain. This ensures superior structural integrity when facing high-pressure surges. From standard Weld Necks (WN) to Blind Flanges (BL), we provide full size coverage from 1/2" to 60", with customization capabilities for oversized diameters up to 4 meters, providing a robust line of defense for your pressure vessels and piping systems.

Core Advantages
·In-house Vertical Manufacturing: Our internal production loop—from raw ingot forging to finished testing—eliminates the quality risks associated with outsourcing, ensuring the high material density required for Class 1500 service.
·Certified Global Compliance: ISO 9001 certified with PED and TS qualifications, our products fully align with international technical standards including ASTM/ASME, API, and EN.
·Advanced Customization: Leveraging our capacity to handle components up to 10 tons and 4 meters in diameter, we provide one-stop solutions from technical evaluation to delivery based on your specific blueprints.
·Rigorous Quality Assurance: An independent QA department conducts exhaustive testing, including Ultrasonic (UT), Magnetic Particle (MT), and Hardness testing, to ensure zero-defect delivery.

Key Features
·Exceptional Pressure Resilience: Specifically designed for Class 1500 ratings, our flanges offer high yield and tensile strength to handle significant system pressure fluctuations.
·Precision Sealing Surfaces: Whether Ring Type Joint (RTJ) or Raised Face (RF), all sealing surfaces are CNC-machined to exacting tolerances for a perfect gasket fit and leak-free performance.
·Optimized Metal Grain Flow: Our forging process ensures that the metal grain flow follows the flange contour, significantly enhancing fatigue resistance at critical stress points like the flange neck.
·Versatile Post-Processing: We support multiple heat treatment protocols (Normalizing, Quenching & Tempering) and various surface finishes (Electro-galvanizing, HDG, or specialized anti-corrosion coatings).

Applications
·Offshore & Onshore Oil & Gas: Wellheads, Christmas trees, and high-pressure gathering manifolds.
·Chemical & Refining: High-pressure reactor connections, hydrogenation units, and severe service piping.
·Power Generation: Boiler feedwater systems and main steam line connections in nuclear and thermal plants.
·Heavy Pressure Vessels: Interface components for high-pressure tanks and non-standard mechanical assemblies.