hami@yuanjdfitting.com
In industrial piping systems, Flat Plate Flanges and SO Flanges (Slip-On Flanges) are both widely used, but they are designed for different working conditions. Understanding their differences can help engineers, contractors, and buyers select the most suitable flange for their projects.
A Flat Plate Flange is manufactured from steel plate without a hub neck. Its structure is simple and cost-effective, making it suitable for:
However, because it has no hub reinforcement, its strength and pressure resistance are lower than those of an SO flange.
SO Flange stands for Slip-On Flange, commonly manufactured according to ASME B16.5 standards. During installation, the pipe slips into the flange bore and is welded on both the inside and outside.
Compared with Flat Plate Flanges, SO Flanges provide:
They are widely used in:
| Feature | Flat Plate Flange | SO Flange |
|---|---|---|
| Structure | No hub | With hub |
| Pressure Rating | Low pressure | Medium pressure |
| Strength | Lower | Higher |
| Cost | More economical | Slightly higher |
| Common Standards | DIN / EN / GOST | ASME B16.5 |
| Welding Performance | Basic | Better |
For low-pressure systems and budget-sensitive projects, Flat Plate Flanges are a practical and economical solution.
For industrial applications requiring higher strength, improved welding performance, and greater reliability, ASME B16.5 SO Flanges are often the preferred choice.
As a professional China steel flange manufacturer, we specialize in producing carbon steel, stainless steel, and alloy steel flanges for customers worldwide. With advanced manufacturing equipment, strict quality control, competitive factory-direct pricing, and extensive export experience, we help distributors, contractors, and industrial buyers source reliable flange solutions for various industries.
Whether you need standard flanges or customized products according to drawings and specifications, our team is ready to support your project with fast quotations, professional service, and on-time delivery.
Looking for a reliable China flange factory? Send us your inquiry today and get a competitive quotation directly from the manufacturer.
Hebei Yuan JiDa Group is a 16 years professional China flange manufacturer.
Contact us:
Email:hami@yuanjdfitting.com
Tel/wechat/whatsapp/skype:+86 18731225866 working time:08:00-18:00 Every day
China Flange types: plate flange,weld neck flange,blind flange,puddle flange,slip on flange,pipe flange, pipe fittings and could provide pipes, valves.....contact us:0086 18731225866 We are flange suppliers.More flange China factory information click below:
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