These gasket flange products are suitable for service with ANSI 150# rated flanged connections and are commonly referred to as an ANSI 150 flange or 150 lb flange configuration. Also available for ANSI 300# rated flanged connections, these full face flange solutions pair with standard pipe flange gaskets to deliver reliable sealing performance. In typical use, an ANSI flange in Class 150 service is matched with properly sized pipe flange gaskets to ensure leak-tight performance.

What does ANSI 150 flange mean? An ANSI 150 flange, often written as ANSI 150 flange or 150 lb flange, denotes a flange that complies with ASME/ANSI B16.5 dimensional and design criteria for Class 150 pressure class systems. What is the pressure rating of an ANSI 150 flange? The pressure rating for an ANSI 150 flange depends on temperature and material, but at ambient temperatures it is generally rated around 285 psi (approx.) and decreases as temperature rises. How do ANSI 150 flanges differ from Class 150 flanges? In common industry usage, ANSI flange terminology (ANSI 150 flange) and Class 150 flanges refer to the same pressure class; the terms are used interchangeably for 150 lb flange components following ASME/ANSI B16.5. What materials are commonly used for ANSI 150 flanges? Typical materials include carbon steel (e.g., A105), stainless steel (e.g., 304/316), and other alloys; gasket flange materials (such as SBR, EPDM, or PTFE) are selected to match media and temperature. What are the dimensions of an ANSI 150 flange? Dimensions for these flanges and the corresponding flange gaskets are governed by ANSI/ASME B16.5 and are summarized below for full face flange gasket layouts.

An ANSI 150 flange, or 150 lb flange, is an ANSI flange standardized by ASME/ANSI B16.5 for pressure class 150 service. Dimensions of the mating faces and bolt patterns are governed by B16.5 to ensure interchangeability of full face flange gaskets and pipe flange gaskets. Typical materials for these flanges include carbon steel and stainless steel, while the gasket flange materials range from SBR and EPDM to PTFE-based compounds. The pressure rating for an ANSI 150 flange is typically around 285 psi at ambient conditions, decreasing with temperature; this is identical in meaning to “Class 150 flanges,” as both terms refer to the same specification. Selecting the correct flange gaskets and pipe flange gaskets ensures reliable sealing performance in both ANSI 150 flange and 300# applications.