Large Diameter Steel Flanges NPS 26 Through NPS 60
|Publication Date:||26 October 1998|
This Standard covers pressure-temperature
Requirements and recommendations regarding bolting and gaskets are also included.
This Standard provides two series of flange dimensions. Series A specifies flange dimensions for general use flanges. Series B specifies flange dimensions for compact flanges which, in general, have smaller bolt circle diameters than Series A flanges. These two series of flanges are not interchangeable. The user should recognize that some flanged valves, equipment bolted between flanges, and flanged equipment may only be compatible with bolt circle diameter of one series of flanges.
Referenced Standards. Standards and specifications adopted by reference in this Standard are shown in Annex E, which is part of this Standard. It is not considered practical to identify the specific edition of each standard and specification in the individual references. Instead, the specific edition reference is identified in Annex E. A flange manufactured in accordance with earlier editions of the referenced standards, and in all other respects conforming to this Standard, will be considered to be in conformance with this Standard.
Codes and Regulations. A flange used under the jurisdiction of the ASME Boiler and Pressure Vessel Code (ASME BPV Code), the ASME Code for Pressure Piping, or a governmental regulation is subject to any limitation of that code or regulation. This includes any maximum temperature limitation, rule governing the use of a material at low temperature, or provisions for operation at a pressure exceeding the pressure-temperature
This Standard cites duties and responsibilities that are to be assumed by the user in the areas of application, installation, hydrostatic testing, operation, and material selection.
Nonmandatory requirements relating to the product manufacturer's Quality System Program are described in Annex D.