The full name of neck flat welding flange is neck flat welding steel pipe flange, which is a commonly used connecting component in industrial pipeline systems. It mainly consists of a flange body with an inner hole in the center and a neck shaped protrusion. The flange body is equipped with multiple screw holes for connecting with bolts. The design of this neck shaped protrusion improves the stiffness and load-bearing capacity of the flange, making the connection between the flange and the pipeline more stable.

 Main material

materialmainIncluding austenitestainless steel、Dual phase steel, titanium alloyHastelloy, Monel, Inconel, and customized special metals.

sealing form

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), full plane (FF), etc.

Diameter range

Its diameter range is usually DN10~DN600, which can meet the connection requirements of various specifications of pipeline systems.

pressure rating

Applicable pressure levels include PN series PN0.6~PN40，Class 系列 Class150~Class1500。

execution standard

Common implementation standards include chemical standard HG20592 and national standardGB/T 9116-2010Mechanical standard JB/T81、American standard ASME B16.5 and ASME B16.47 Wait.

Installation method

When installing, simply insert the pipeline into the flange hole and adjust it to the appropriate position, then perform single-sided welding, and connect it to another flange through bolts. The installation process is relatively simple.

Scope of application

Widely used in pipeline systems in various industries such as petroleum, chemical, natural gas, water treatment, pharmaceuticals, and food, suitable for connecting pipelines of various materials, specifications, and pressures.