Seek advice on HG/T 20592~20635—2009
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Are the standard numbers between 20592 and 20635 consecutive? Are there 43 standards in total between 635 and 592? What are these standards respectively? I searched on the forum and found these; it seems they aren’t sequential... HG/T 20592—2009 Types and parameters of steel pipe flanges (PN series) HG/T 20606—2009 Non-metallic flat gaskets for steel pipe flanges (PN series) HG/T 20607—2009 PTFE-coated gaskets for steel pipe flanges (PN series) HG/T 20609—2009 Metal-coated gaskets for steel pipe flanges (PN series) HG/T 20610—2009 Wound gaskets for steel pipe flanges (PN series) HG/T 20611—2009 Toothed composite gaskets for steel pipe flanges (PN series) HG/T 20612—2009 Metal ring gaskets for steel pipe flanges (PN series) HG/T 20613—2009 Fasteners for steel pipe flanges (PN series) HG/T 20614—2009 Specifications for the selection of steel pipe flanges, gaskets, and fasteners (PN series) HG/T 20615—2009 Types and parameters of steel pipe flanges (Class series) HG/T 20623—2009 Large-diameter steel pipe flanges (Class series) HG/T 20627—2009 Non-metallic flat gaskets for steel pipe flanges (Class series) HG/T 20628—2009 PTFE-coated gaskets for steel pipe flanges (Class series) HG/T 20630—2009 Metal-coated gaskets for steel pipe flanges (Class series) HG/T 20631—2009 Wound gaskets for steel pipe flanges (Class series) HG/T 20632—2009 Toothed composite gaskets for steel pipe flanges (Class series) HG/T 20633—2009 Metal ring gaskets for steel pipe flanges (Class series) HG/T 20634—2009 Fasteners for steel pipe flanges (Class series) HG/T 20635—2009 Specifications for the selection of steel pipe flanges, gaskets, and fasteners (Class series)
This post was last edited by hjame on 2017-3-13 at 20:43. The attachment contains the instructions prior to the table of contents in the 2009 version; reading that will make things clear. In the 1997 version of the standards (HG 20592–20635-1997), the numbers were consecutive, but the 2009 version combined them, so some numbers were incorporated into others, resulting in a sequence that is not completely continuous.
Help me check if this table was prepared using the old standards? Now, the standard code for flanges is 50292; there are no more codes like 20593-20595, right?
1. It was written using the old standards; your table indicates that these are mandatory standards, with only the 1997 version being mandatory, while the 2009 version is a recommended standard. The standard numbers replacing the attachments on the 4th floor have been specified. 2. It corresponds to the contents in HG/T 20592-2009.
Great stuff, downloaded and learned it*.