Standard No.:	GB/T 17241.3-1998
English Name:	Hubbed threaded cast iron pipe flanges
Chinese Name:	带颈螺纹铸铁管法兰
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:	CSBTS
Issued on:	1998-3-5
Implemented on:	1998-1-2
Status:	superseded
Superseded by:	GB/T 17241.2-2024 Cast iron pipe flanges—Part 2: Class designated GB/T 17241.1-2024 Cast iron pipe flanges—Part 1:PN designated
Superseded on:	2024-11-1
Abolished on:	2024-11-01
Superseding:	GB 4216.7-1984 GB 4216.8-1984 Dimensions of 10 and 16 bar gray cast iron threaded pipe flanges JB/T 5975.1-1992 GB 12381.5-1990 PN5.0MPa (50bar) Convex Surface Necked Threaded Ductile Iron Pipe Flange GB 12381.3-1990 PN2.5 MPa (25bar) Convex Surface Necked Threaded Ductile Iron Pipe Flange GB 12381.1-1990 PN1.0MPa (10bar) and PN 1.6MPa (16bar) Convex Surface Necked Threaded Ductile Iron Pipe Flange GB 12381.4-1990 PN4.0MPa (40bar) Convex Surface Necked Threaded Ductile Iron Pipe Flange GB 12381.2-1990 PN 2.0MPa (20bar) Convex Surface Necked Threaded Ductile Iron Pipe Flange
Language:	English
File Format:	PDF
Word Count:	2500 words
Price(USD):	50.0
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1 Scope This standard specifies the types and dimensions of hubbed threaded gray cast iron, ductile cast iron and malleable cast iron pipe flanges whose nominal pressure, PN, is 1.0, 1.6, 2.0, 2.5, 4.0 or 5.0MPa. 2 Normative References The following normative documents contain provisions which, through reference in this text, constitute provisions of this standard. At time of publication, the editions indicated were valid. All the standards will be modified, and all parties using this standard shall discuss the possibility of using the latest version.

Foreword I ISO Foreword 1 Scope 2 Normative References 3 Types and Dimensions 4 Technical Requirements 5 Example of Marking