We use Cookies to create a secure and effective website experience for our customers. For more information about Cookies and how you can disable Cookies, visit our privacy policy page.
Learn More
Privacy Preference Centre
Please manage your cookie choices by switching the consent toggles on or off under the Purposes below.
You may change your preference at any time as described in our Cookie Policy
1.1 General This Standard covers wrought steel flanges primarily intended for use in oil or gas pipeline systems.
1.2 Size, Grade, Nominal Pressure Class, and Category
1.2.1 Size This Standard covers flanges in sizes from NPS 1/2 to NPS 60, inclusive. (Refer to Appendix A, Table A1.)
1.2.2 Grade This Standard covers flanges from Grade 248 to Grade 483, inclusive. The standard grades are shown in Table 1.
1.2.3 Nominal Pressure Class This Standard covers flanges having cold working-pressure ratings designated by nominal pressure classes from PN 20 to PN 420, inclusive. The standard nominal pressure classes are shown in Table 2. (ANSI class designations are shown in Appendix B.)
1.2.4 Category This Standard covers flanges in the following categories: (a) Category I - flanges without requirements for proven notch- toughness properties; and (b) Category II - flanges with requirements for proven notch- toughness properties.
1.3 Assemblies This Standard does not cover assemblies.* *An assembly means a grouping of fittings or flanges, or both, joined by one or more circumferential welds.
Login or Register
View Access for this document is only available for viewers in Canada