The ANSI Class rating of a flange is defined as the maximum amount of pressure that the flange can withstand at increasing temperatures. SMGI provide all seven primary pressure classes for flanges, which are 150, 300, 400, 600, 900, 1500, and 2500

A DIN standard is a standard drawn up at the German Institute for Standardisation (DIN) in Berlin that sets unified standards for products and processes, such as quality, minimum performance, characteristics, dimensions, etc. SMGI provide the Pressures Ratings (PN) up to 40Bar such as PN6, PN10, PN16, PN25 and PN40.

The Japanese Industrial Standard (JIS), published by the Japanese Standards Association (JSA) which is the equivalent of ANSI in the United States. They are created and updated by the Committee of the Japanese Industrial Standards (JISC). SMGI provide the JIS F7805, F2220, F2216, F2291 and F7806. up to 350Kgf/㎠

A weld neck flange, also called a tapered hub flange or high-hub flange, is a kind of flange that can relocate stress to the pipes, ensuring a decrease in high-stress concentration at the bottom of the flange. SMGI provide seven types and size up to 63Kgf/Cm2 and FACING 2.