YUHAO Flange Size Range Capability: From 1/2" to 60" — Comprehensive Dimensional Coverage for Every Application

In piping system design, flange size is not just a dimension — it determines flow capacity, structural load distribution, and installation compatibility. YUHAO Hardware delivers uninterrupted size range coverage from NPS 1/2″ (DN 15) to NPS 60″ (DN 1500), ensuring that whatever your pipeline specification demands, there is a YUHAO flange that fits — precisely.

Many flange manufacturers specialize in only a narrow dimensional band. This forces project procurement teams to engage multiple suppliers — one for small-bore instrument flanges, another for mid-range process flanges, and yet another for large-diameter vessel connections. The result: fragmented supply chains, inconsistent quality, and logistical complexity. YUHAO eliminates this fragmentation by offering full-spectrum size capability, from the smallest threaded instrument flange to the largest weld-neck reactor flange.

Typical Applications: Instrumentation tubing, hydraulic lines, sampling systems, drain and vent connections, chemical injection points.

At the small end of the spectrum, precision is paramount. Flanges in this range are frequently used in high-pressure, low-flow applications where bore alignment, thread integrity, and face flatness directly impact leak-tight performance. YUHAO manufactures small-bore flanges in all facing types — RF, FF, and RTJ — across Class 150 through Class 2500, with special focus on NPT and SW (Socket Weld) configurations common in instrument engineering.

Typical Applications: Process piping in refineries, chemical plants, power stations, LNG terminals, water treatment facilities.

This is the workhorse range of industrial piping — the diameters most frequently specified in project piping classes. Flanges in this band carry the bulk of process fluids and must balance strength, weight, and cost. YUHAO maintains extensive inventory and short lead-time production capability in this range, covering Weld Neck, Slip-On, Socket Weld, Lap Joint, Threaded, and Blind types in carbon steel, stainless steel, alloy steel, and duplex grades.

Typical Applications: Main transfer lines, compressor station headers, heat exchanger connections, column and vessel nozzles, firewater mains.

As pipe diameters increase, flange design shifts from commodity to engineered product. Weight escalates dramatically — an NPS 24″ Class 600 Weld Neck flange can weigh over 600 kg. Bolt tensioning sequences, gasket seating stress, and flange rotation under load become critical engineering considerations. YUHAO produces large-bore flanges with rigorous dimensional inspection (including CMM verification of bolt circle tolerances) and provides full EN 10204 3.1 certification for every piece.

Flanges in this category are governed by ASME B16.47 Series A and Series B (replacing the older MSS SP-44 and API 605 specifications). Series A flanges are heavier, thicker, and have fewer but larger bolts — preferred for new construction. Series B flanges are lighter and more compact — often specified for retrofit and replacement projects where weight constraints matter. YUHAO manufactures both Series A and Series B in the full B16.47 scope (NPS 26″ through 60″), across all pressure classes, with welding ends prepared for any specified wall schedule.

• Instrument & utility lines: NPS 1/2″ – 2″ — small-bore precision flanges, SW/THRD ends
• Process piping: NPS 2½″ – 12″ — the industrial backbone, highest volume demand
• Transfer & header lines: NPS 14″ – 24″ — large-bore engineered flanges
• Vessel & tower connections: NPS 26″ – 60″ — extra-large B16.47 flanges, Series A or B

YUHAO is one of the few manufacturers capable of delivering the complete dimensional spectrum from 1/2″ to 60″ under one quality system. This means your entire project piping specification — from instrument flanges to reactor body flanges — can be sourced from a single, audit-ready supplier. All flanges are manufactured to the applicable dimensional standard (ASME B16.5, B16.47, EN 1092-1, JIS B2220, or GOST) and shipped with full material traceability.

For inquiries about specific sizes, pressure classes, or material grades, contact YUHAO with your piping class specification or project MTO (Material Take-Off). Our team will provide a consolidated quotation covering all sizes in your scope.