Yes, the designations ASA 150 and 150# refer to the same type of flanges and indicate the same pressure rating. Both symbols signify that the flanges are designed to operate at a maximum nominal pressure of 150 psi (pounds per square inch), which is approximately 10.34 bar.
Explanation of the Designations:
- ASA 150: This is an older designation associated with the American Standards Association (the predecessor of ANSI).
- 150#: This is a more modern and commonly used designation, expressing the same pressure class in a simplified form.
Both terms are often used interchangeably in reference to flanges that comply with the ASME B16.5 standard (or its earlier versions). If these designations appear on technical drawings, they can be considered equivalent, as long as they relate to the same design standard.
