Standard No.:	NB/T 47025-2012
English Name:	Spiral wound gaskets
Chinese Name:	缠绕垫片
Professional Classification:	NB    Professional Standard - Energy
Issued by:	NEP
Issued on:	2012-11-9
Implemented on:	2013-3-1
Status:	valid
Superseding:	JB/T 4705-2000 Spiral wound gaskets
Language:	English
File Format:	PDF
Word Count:	2000 words
Price(USD):	40.0
Delivery:	via email in 1 business day

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