Standard No.:	QB/T 3625-1999
English Name:	Polytetrafluoroethylene Plate
Chinese Name:	聚四氟乙烯板材
Chinese Classification:	G33    Plastic profile
Professional Classification:	QB    Professional Standard - Light Industry
Issued by:	国家轻工业局
Issued on:	1999-4-21
Implemented on:	1999-4-21
Status:	superseded
Superseded by:	QB/T 5257-2018 Polytetrafluoroethylene (PTFE) sheet
Superseded on:	2018-9-1
Superseding:	ZB/T G33002-1985
Language:	English
File Format:	PDF
Word Count:	6000 words
Price(USD):	180.0
Delivery:	via email in 1 business day

Polytetrafluoroethylene plate This standard is applicable to polytetrafluoroethylene plates formed by die pressing method or plates made by turning or rolling blanks formed by die pressing method or hydraulic method (hereinafter referred to as "plates"). 1 Classification SFB-1: mainly used for electrical insulation. SFB-2: mainly used as gasket, seal and lubricating materials in corrosive medium. SFB-3: mainly used as diaphragm and sight glass in corrosive medium. 2 Specifications The overall dimension and tolerance of plates shall meet those specified in Table 1. 。。。。。。 。。。 。。。 4 Test methods 4.1 Measurement of overall dimensions 4.1.1 Thickness The plate thickness shall be measured with a measuring tool with accuracy of 0.02mm. 4.1.2 Length and width The plate length and width shall be measured using a steel ruler or tape with accuracy of 1mm. 4.2 Appearance Observe in natural light.

Foreword I 1 Classification 2 Specifications 3 Technical requirements 4 Test methods 5 Inspection rules 6 Marking, packaging, transport and storage Annex A Preparation of standard samples