1 Scope
This standard specifies the dimension and technical requirements of spiral wound gaskets for pressure vessel flanges.
This standard is applicable to spiral wound gaskets for the "B-type Socket-weld Flange" (NB/T 47022) and "Welding Neck Flange" (NB/T 47023).
Note: the use of materials containing asbestos shall comply with requirements of related laws and regulations. During the production and use of gaskets containing asbestos, protective measures shall be taken to avoid any personal health hazard.
2 Normative References
The following documents are indispensable for the application of this document. For dated references, only the dated edition applies. For undated references, the latest edition (including all the amendments) of the normative document applies.
Foreword I
1 Scope 1
2 Normative References 1
3 Code, Designation and Designation Example 1
4 Structural Type and Dimension 2
5 Limit Deviation of Gasket Dimension 5
6 Other Technical Requirements for Gaskets 5
