Standard No.:	GB/T 9112-2010
English Name:	Types and parameters for steel pipe flanges
Chinese Name:	钢制管法兰　类型与参数
Chinese Classification:	J15    Pipeline fittings
Professional Classification:	GB    National Standard
ICS Classification:	23.040.60 23.040.60    Flanges, couplings and joints 23.040.60
Issued by:	AQSIQ
Issued on:	2011-1-10
Implemented on:	2011-10-1
Status:	superseded
Superseded by:	GB/T 9124.1-2019 Steel pipe flanges—Part 1:PN designated GB/T 9124.2-2019 Steel pipe flanges—Part 2:Class designated GB/T 9124-2019 Steel pipe flanges
Superseded on:	2019-12-1
Superseding:	GB/T 10745-1989 GB/T 9112-2000 Types and parameters for steel pipe flanges GB 10745-1989 Marine pipe flanges; types
Language:	English
File Format:	PDF
Word Count:	15000 words
Price(USD):	110.0
Delivery:	via email in 1 business day

1 Scope This standard specifies the nominal pressure and nominal dimension of steel pipe flanges and blank flanges and the outside diameter of steel pipe, flange types and codes, sealing face types and code as well as the application scope of various types of flanges. This standard is applicable to the steel pipe flanges and blank flanges specified in GB/T 9113~9123. 2 Normative References The following standards contain provisions which, through reference in this standard, constitute provisions of this standard. For dated reference, subsequent amendments to (excluding correction to), or revisions of, any of these publications do not apply. However, the parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the standards. For undated references, the latest edition of the normative document referred to applies GB/T 9113 Integral Steel Pipe Flanges GB/T 9114 Hubbed Screwed Steel Pipe Flanges GB/T 9115 Steel Pipe Welding Neck Flanges GB/T 9116 Hubbed Slip-on-welding Steel Pipe Flanges GB/T 9117 Hubbed Socket Welding Steel Pipe Flanges GB/T 9118 Loose Hubbed Steel Pipe Flanges with Welding Neck Collar GB/T 9119 Slip-on-welding Steel Pipe Flanges GB/T 9120 Loose Hubbed Steel Pipe Flanges with Weld-neck Collar and with Weld Ring Neck GB/T 9121 Loose Plate Steel Pipe Flanges with Weld-on Collar GB/T 9122 Loose Plate Steel Pipe Flanges with Lapped Pipe End and Pressed Collar with Long Neck GB/T 9123 Steel Pipe Blank Flanges 3 Nominal Pressure This standard specifies 12 nominal pressure classes of the PN-designated nominal pressure and 6 pressure classes of Class-designated nominal pressure. The nominal pressure designations of these two series are as follows: PN series Class series

Foreword I Introduction III 1 Scope 2 Normative References 3 Nominal Pressure 4 Nominal Dimension and Outside Diameter of Steel Pipe 5 Types and Codes of Flanges 6 Types and Codes of Sealing Faces 7 Types and Application Scope of Flanges