GB/T 9121-2010
Loose plate steel pipe flanges with weld-on collar

Be replaced

Standard No.

GB/T 9121-2010

Language

Chinese

Release Date

2011

Published By

General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China

Replace By

GB/T 9124.1-2019

GB/T 9124.2-2019

Lastest

GB/T 9124.1-2019

GB/T 9124.2-2019

Replace

GB/T 2508-1989 GB/T 9121.3-2000 GB/T 9121.2-2000 GB/T 9121.1-2000

Scope

This standard specifies the type, size, technical requirements and marks of flat welded ring plate loose sleeve steel pipe flanges marked with PN for nominal pressure. This standard is applicable to flat-welded ring plate loose sleeve steel pipe flanges with nominal pressure PN2.5~PN40.

GB/T 9121-2010 Referenced Document

• GB/T 9112 Types and parameters for steel pipe flanges
• GB/T 9124 Specifications for steel pipe flanges*， 2011-10-01 Update

GB/T 9121-2010 history

• 2019 GB/T 9124.1-2019 Steel pipe flanges—Part 1：PN designated
• 2011 GB/T 9121-2010 Loose plate steel pipe flanges with weld-on collar
• 2000 GB/T 9121.1-2000 Loose plate steel pipe flanges with weld-on collar with raised face
• 1989 GB/T 2508-1989 Marine combination pipe flanges,slip-on steel outer flanges,fillet weld-on steel inner flanges

GB/T 9121-2010 Loose plate steel pipe flanges with weld-on collar has been changed from GB/T 2508-1989 Marine combination pipe flanges,slip-on steel outer flanges,fillet weld-on steel inner flanges.

GB/T 9121-2010 Loose plate steel pipe flanges with weld-on collar was changed to GB/T 9124.1-2019 Steel pipe flanges—Part 1：PN designated.

GB/T 9121-2010 Loose plate steel pipe flanges with weld-on collar was changed to GB/T 9124.2-2019 Steel pipe flanges—Part 2: Class designated.