German Standard Flanged Socket Welding Flange

Introduction to DIN Flanged Socket Welding Fittings

German Standard Flanged Socket Welding Flange, commonly known as "so flange" in English.

The difference from the GB Flanged Socket Welding Flange lies in the different standards, corresponding dimensions. The GB Flanged Socket Welding Flange refers to the dimensions specified by China's standard, whereas the DIN Flanged Socket Welding Flange is based on the dimensions set by Germany.

Features of Flanged Socket Welding Fittings

Waist Flanged Flanges offer excellent sealing performance, with a variety of sealing surface options. Additionally, featuring a small short neck, they significantly enhance the stiffness of the flange, thereby increasing its load-bearing capacity.

German Standard Flanged Flat Welding Flange Specifications and Models

DN15-DN3600

Pressure rating of DIN flange

PN6-PN100

Flange Sealing Type

Rounded Face (RF), Flat Face (FF), Milled Face (MFM), Concave Face (FM), Mounded Face (M), Tongue and Groove (TG)

The concave-convex flanged flat weld (MFM) is part of the matching set.

Material selection for flanges

Carbon Steel Flanges: ASTM A105, 20#, Q235, 16Mn, ASTM A350 LF1, LF2 CL1/CL2, LF3 CL1/CL2, ASTM A694 F42, F46, F48, F50, F52, F56, F60, F65, F70

Stainless Steel Flanges: ASTM A182 F304, 304L, F316, 316L, 1Cr18Ni9Ti, 0Cr18Ni9Ti, 321, 18-8

Alloy Steel Flanges: ASTM A182 F1, F5a, F9, F11, F12, F22, F91, A182F12, A182F11, 16MnR, Cr5Mo, 12Cr1MoV, 15CrMo, 12Cr2Mo1, A335P22, St45.8/Ⅲ

DIN necked flat welding flange execution standard

DIN2630-2637

EN1092-1

Flange connection type

Single-sided welding, double-sided bolted.

Manufacturing Process for Necked Flanged Plate Fittings

Pure material forging, high precision turning;

Advantages and Disadvantages of Flanged Socket Welding Fittings

Advantages: Necked flat welding flanges are also a type within the flat welding flange series, as the short neck enhances the flange's strength and improves its load-bearing capacity, making them suitable for pipelines under higher pressure.

Disadvantages: More expensive than plate-type welding flanges; due to its shape, it is more prone to dings during transportation.

Procurement Recommendation

1: Recommend purchasing from a reputable颈平焊法兰 manufacturer with a certain production scale.

2: Manufacturers of flanges must provide material inspection reports and relevant documents for necked butt-welding flanges.

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