Product Introduction
SO40-1.0RF with neck flat welding flange

The full name of the neck flat welding flange is the neck flat welding steel pipe flange. The English name is Slip on, abbreviated as SO. Like the plate flat welding flange, the neck flat welding flange also uses steel pipes

A flange that extends into the flange and is connected to the equipment or pipeline through a fillet weld.

The common manufacturing standards in China include: National Standards of the People's Republic of China

GB/T 9116-2010 Hubbed slide on welding steel pipe flanges;

The People's Republic of China

The provisions of Tables 8.2.2-1 to 8.2.2-5 in the PN series (European system) of the chemical industry standard HG/T20592~20635-2009

According to Tables 8.2.1-1 to 8.2.2-6 of HG/T20592~20635-2009 Class Series (American System), flanges with neck flat welding are specified
The sealing surface forms of flanges with neck flat welding include: convex surface (RF), concave surface (FM), convex surface (M), tenon surface (T), groove surface (G), and full plane (FF).

Diameter range with neck flat welding flange: DN10~DN600 Applicable range: PN series PN2.5~PN40; Class series

Class150~Class1500 flange materials: carbon steel, molybdenum steel, 304, 316, 304L, 316L, 321, 347, CF8C.

Manufacturing process: Forging. Advantages: Neck welding flanges are also considered as flat welding flanges because they have a short neck, which increases the strength of the flange and changes its shape

The load-bearing capacity of the flange. So it can be used on pipelines with higher pressure. Disadvantages: Compared to flat welding flanges, the cost is higher due to its unique shape

It is more prone to collision during transportation.