Stainless Steel Socket Weld Flange - Brief Introduction

Stainless steel socket weld flange is represented by the English letters "SWF".

Stainless steel socket welding flanges, also known as stainless steel socket welding flanges, are sometimes referred to as "so flanges" in certain regions.

Stainless steel flanges feature attractive appearance, smooth and flat surfaces, excellent resistance to acids and alkalis, corrosion prevention, and strong texture and performance.

Comparing with carbon steel, the hardness of necked butt-welding flanges is slightly lower, but due to their chemical composition and application performance, which carbon steel flanges cannot achieve, they are also more expensive.

Model and Specifications

DN15~DN600

Pressure Rating

PN Series: PN2.5MPa to PN40MPa

Class Series: Class150 to Class1500

Stainless steel socket weld flange with type SO material

ASTM A182 F304、304L、 F316、316L、1Cr18Ni9Ti、0Cr18Ni9Ti、321、18-8;

Common stainless steel grades used include 304, 304L, 316, and 316L;

Standard of Execution

China National Standard: GB/T 9116-2010 Flanged Welding Steel Pipe Fittings with Neck

China National Standard for Chemical Industry: HG/T20592~20635-2009, PN series (European system), Class series (American system) in HG/T20592~20635-2009.

Connection Type

Same welding process as flat welding flanges, single-sided welding, double-sided nut connection.

In simple terms, it involves inserting the pipe into the inside diameter of the socket weld flange and welding it, followed by securing both sides with bolts and nuts.

Production Process

Aerated furnace blanking, overall forging or finished forging cutting shaping process, high-precision CNC lathe turning, CNC radial arm drilling;

Advantages and Disadvantages of Stainless Steel Flanged Socket Welding Fittings

Advantages

Due to its material properties, it is often used in engineering for **acidity and alkalinity**, **corrosion prevention**, and similar applications.

2: Necked flat weld flanges are also a type of flat weld flange due to their short neck, which enhances the flange's strength and improves its load-bearing capacity. Therefore, they can be used on pipelines with higher pressure.

Drawbacks

The cost is higher compared to flat welding flanges, as their shape makes them more prone to dings during transportation.

2: stainless steel flanged blind flanges are relatively more expensive than those made of other materials.

Procurement Recommendations

1: Recommend purchasing from a reputable stainless steel socket weld flange manufacturer with a certain production scale.

2: manufacturers of flanges are required to provide material inspection reports and related documents for necked welding flanges.

3:颈平焊法兰 must have corresponding specification and model stamping and identification.