Standard No.:	HG/T 20633-2009
English Name:	Metallic Ring Joint Gaskets for Use with Steel Pipe Flanges (Class designated)
Chinese Name:	钢制管法兰金属环形垫（Class 系列)
Professional Classification:	HG    Professional Standard - Chemistry
Source Content Issued by:	MIIT
Issued on:	2009-2-5
Implemented on:	2009-7-1
Status:	valid
Target Language:	English
File Format:	PDF
Word Count:	3000 words
Translation Price(USD):	60.0
Delivery:	via email in 1 business day

1. Scope This standard specifies the type, dimension, technical requirements, marking and sign of metallic ring joint gaskets for use with steel pipe flanges (Class designated). This standard is applicable to the metallic ring joint gaskets for use with steel pipe flanges whose nominal pressures are from C1assl50 (PN20)- Class2500 ( PN420) which are specified in HG/T 20615 and HG/T 20623. 2. Normative references The following provisions contained in the following standards are turned into the provisions of this national standard by being referred in this national standard. For date reference, the subsequent amendments to (excluding amending error in the text) or revisions of, any of these publications do not apply. And parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. For undated references, its latest edition referred to applies. GB/T 222 "Permissible Tolerances for Chemical Composition of Steel Produts" GB/T 699 "Quality Carbon Structural Steels" GB/T 1220 "Stainless Steel Bars"

Contents 1. Scope 2. Normative references 3. General provisions 3.1 Type 3.2 Nominal pressure and nominal dimension 3.3 Material and operating requirement 4. Dimension 5. Technical requirements 5.1 Appearance 5.2 Dimension tolerance 5.3 Manufacture 5.4 Inspection 5.5 Performance test and method 6. Inspection 7. Marking and labeling 7.1 Marking and illustration 7.2 Labeling