Because of the additional strength provided by our Ansi Flanges, mechanical systems, structures, and assemblies with excellent performance are being built worldwide. Ansi Flanges, which are marketed by NIKO STEEL AND ENGINEERING LLP and have been tested and certified to satisfy the specifications of the American National Standards Institute, holds the organization's seal of approval for the most demanding applications. Unless otherwise stated, these flanges will be supplied with a raised face on the outside. All measurements are in inches unless otherwise stated. In the absence of specific instructions, a standard bore will be provided.