Slip-On Flange (SO)-28 Years Dedicated to High-Value-for-Money Pipeline Connection Solutions

Among Zhongli Flange's diverse clientele, approximately 40% of piping projects operating under low-pressure, ambient-temperature conditions with water, steam, air, and non-corrosive media prefer slip-on flanges. Compared to weld neck flanges, they eliminate the need for costly “high necks,” reducing procurement costs for your project while maintaining reliable sealing performance. For 28 years, we have continuously optimized the forging and machining processes for slip-on flanges, committed to providing customers with on-demand, stable, reliable, and cost-effective solutions.

Four Key Value Points of Zhongli Manufacturing's Slip-On Flange

Our concept of “economy” never comes at the expense of quality. Through large-scale procurement, process optimization, and stringent quality control, Zhongli Flange creates value for you across four dimensions:

Precise Cost Control, Transparent Value

Material Optimization: We establish direct supply partnerships with major domestic steel mills, centrally procuring common billets like A105 and 304. This ensures consistent quality from the source while reducing costs.

Process Efficiency: Utilizing multi-station CNC machines, we reduce comprehensive processing time per flange by approximately 10% compared to traditional methods. These efficiency gains are directly passed on to our customers.

Precision and Consistency Beyond Standards

Every batch of flanges you receive exhibits exceptional dimensional interchangeability. Our CNC drilling machines ensure bolt hole center circle diameter (PCD) tolerances below ±0.3mm, while sealing surfaces (RF/MFM) consistently achieve surface roughness Ra≤3.2μm—eliminating installation leaks caused by component tolerances.

Engineered for Effortless Installation

While the slip-on design of our slip-on flanges simplifies installation, our meticulous deburring and clear stamped markings (material, pressure rating) further reduce on-site assembly time and errors.

Global Market Certification Support

Our slip-on flanges comply with Chinese national standards, and our production lines and quality management system hold ISO 9001:2015 certification. For export markets, we offer multiple standards including GB (China National Standard), HG (Chemical Industry Standard), ASME (American Society of Mechanical Engineers), and API.

Technical Specifications：

Why do customers choose Zhongli as their flange supplier?

Verifiable Quality Commitment: We operate a professional testing laboratory equipped with ultrasonic flaw detectors, tensile testing machines, and other specialized equipment. We can perform corresponding inspections on flanges according to your technical specifications.

Seamless Transition from Drawings to Products: Our technical team provides complimentary drawing compliance reviews and optimization recommendations to prevent delivery delays caused by design details.

Transparent Production Progress Updates: After contract signing, we provide regular production status updates (e.g., blanking, forging, machining).

Export-Grade Packaging & Logistics: We use export-grade wooden crates as standard packaging to ensure products arrive intact after long-distance sea transport, complete with full customs documentation support.

Next Steps: Get Your Custom Quote

Please provide your technical specifications, purchase quantity, and target delivery date. Our sales engineer will contact you within 24 hours and provide:

Detailed quotation specifications,

Estimated delivery time based on current production capacity.