Slip-On Flanges (SO) are the industry preference for piping systems requiring easy alignment and cost-effective assembly. Jiangyin Zhonghai Precision Machinery Co., Ltd. manufactures high-performance Class 150 Slip-On Flanges that strictly adhere to ASME/ANSI B16.5 standards.

Distinguished from common plate-cut flanges, our products benefit from robust in-house forging capabilities, ensuring a dense grain structure and superior fatigue resistance. We support a comprehensive size range from 1/2" to 60" and provide end-to-end customization—from metallurgy selection to structural optimization—for your most demanding industrial applications.

Core Advantages
·Forged Quality Excellence: With integrated forging and heat treatment, our flanges offer mechanical properties far exceeding those of plate-cut alternatives, ensuring zero internal defects.
·Global Compliance & Certification: ISO 9001 certified with PED/TS qualifications. All production processes align with ASTM, ASME, API, and other international technical codes.
·"Blueprint-to-Product" Capability: Whether it is a standard specification or a complex custom geometry (specific ID/Thickness), we provide rapid assessment, prototyping, and mass production services.
·Full-Chain Precision Control: From ingot heating to CNC turning and multi-axis drilling, we guarantee tight tolerances on sealing faces and bolt hole alignments for seamless site installation.

Product Features
·Low Installation Costs: Utilizing fillet welds on both the inside and outside, these flanges require less precision in pipe cutting and offer easier alignment.
·Superior Sealing Surface: Available in RF, FF, and RTJ finishes. CNC precision machining ensures uniform gasket seating and leak-proof performance.
·Extensive Material Portfolio: Available in Carbon Steel (A105), Stainless Steel (304/316 series), and Duplex steels to handle various corrosive and industrial media.
·Rigorous QA/QC: Our independent Quality Assurance department oversees physical/chemical analysis and Non-Destructive Testing (NDT) to verify Class 150 pressure rating compliance.

Applications
·Oil & Gas: Low-pressure transport lines, process piping, and storage tank interfaces.
·Public Utilities: Municipal water/wastewater systems, fire protection networks, and HVAC.
·Industrial Machinery: Inlet/outlet connections for pumps, valves, and filtration units.
·Power Generation: Auxiliary water cycles and non-critical steam lines in power plants.