Split Stainless Steel Pipe Flanges 5K 10K 16K 20K Corrosion Resistant JIS SUS304

JIS SUS304 Stainless Steel Split Flange 5K 10K 20K

Split flanges are made up of 2 pieces that can be interlocked securely using nuts and bolts. Split Flange is used to reinforce areas that have been weakened in the piping system. Split flange manufacturers recommend the use of these flanges as flat faced flanges by removing the raised projection on the outside face of the flange.

Material:Stainless Steel SUS304

SUS304 material is a Japanese JIS standard and the most commonly used stainless steel, containing 18% Cr and 8% Ni. It can maintain good strength and heat resistance in high temperature and low temperature environments, and also has good corrosion resistance, weldability, cold workability and mechanical properties in the mild atmosphere.

SUS304 Stainless Steel Chemical Composition

SUS304 Stainless Steel Mechanical Properties

Most Common Face Type of Split Flange

FF-Flat Face

The Flat Face flange has a gasket surface in the same plane as the bolting circle face. Applications using flat face flanges are frequently those in which the mating flange or flanged fitting is made from a casting.

Raised Face height

For the height measures H and B of all described dimensions of flanges on this website, with exception of the Lap Joint flange, it is important to understand and remember the following..

In pressure classes 150 and 300, the height of raised face is approximately 1.6 mm (1/16 inch). In these two pressure classes, almost all suppliers of flanges, show in their catalog or brochure, the H and B dimensions including the raised face height. ((Fig. 1))

In pressure classes 400, 600, 900, 1500 and 2500, the height of raised face is approximately 6.4 mm (1/4 inch). In these pressure classes, most suppliers show the H and B dimensions excluding the raised face height. (Fig. 2)

Ring-Type Joint (RTJ)

The Ring Type Joint flanges are typically used in high pressure (Class 600 and higher rating) and/or high temperature services above 800°F (427°C). They have grooves cut into their faces which steel ring gaskets. The flanges seal when tightened bolts compress the gasket between the flanges into the grooves, deforming (or Coining) the gasket to make intimate contact inside the grooves, creating a metal to metal seal.

An RTJ flange may have a raised face with a ring groove machined into it. This raised face does not serve as any part of the sealing means. For RTJ flanges that seal with ring gaskets, the raised faces of the connected and tightened flanges may contact each other. In this case the compressed gasket will not bear additional load beyond the bolt tension, vibration and movement cannot further crush the gasket and lessen the connecting tension.

Product Information

JIS 5K Split Flange Dimensions (mm)

JIS 10K Split Flange Dimensions (mm)

JIS 20K Split Flange Dimensions (mm)