HG 20628-1997
PTFE coated gaskets for steel pipe flanges (American system) (English Version)

Standard No.

HG 20628-1997

Language

Chinese, Available in English version

Release Date

1997

Published By

Professional Standard - Chemical Industry

Status

Be replaced 2009-07

Replace By

HG/T 20628-2009

Latest

HG/T 20628-2009

Scope

This standard specifies the type, size and technical requirements for polytetrafluoroethylene-coated gaskets for steel pipe flanges (American system). This standard is applicable to PTFE for raised face steel pipe flanges with a nominal pressure PN of 2.0MPa (Class 150) ~ 5.0MPa (Class300) and an operating temperature of ≤150℃^((Note)) specified in HG 20615 Vinyl covered gasket.

HG 20628-1997 history

• 2009 HG/T 20628-2009 PTFE envelope gaskets for use with steel pipe flanges(Class designated)
• 1997 HG 20628-1997 PTFE coated gaskets for steel pipe flanges (American system)

HG 20628-1997 PTFE coated gaskets for steel pipe flanges (American system) was changed to HG/T 20628-2009 PTFE envelope gaskets for use with steel pipe flanges(Class designated).