This standard specifies the type, size, technical requirements and relevant use regulations of threaded steel pipe flanges (European system). This standard applies to threaded steel pipe flanges with nominal pressure PNO. 6 MPa (6bar) ^ 4.0 MPa (40bar). The threaded flanges specified in this standard are only applicable to A series steel pipes specified in HG 20592. HG 20598-1997 Threaded Steel Pipe Flanges (European System) HG20598-1997 Standard Download Decompression Password: www.bzxz.net

Threaded steel pipe flanges
(European system)
HG 20598 -- 97
Subject content and scope of application
This standard specifies the types, dimensions, technical requirements and relevant use regulations of threaded steel pipe flanges (European system). This standard applies to threaded steel pipe flanges with nominal pressure PNoGMFa (6bar)-4.0MPa (40har). The threaded flanges specified in this standard are applicable to A series steel pipes specified in HG20592, 81
GR 7306
G13/T12716
HG20592
HG 20203
HG 0Sn
HG20613
H: 20614
Referenced standards
"Pipe threads sealed with threads
"60\Lake cone pipe threads"
"Types and numbers of steel pipe flanges (European system)""Technical conditions for steel pipe flanges (European system)""Pressure-temperature grades of steel pipe covers (European system)""Fasteners for steel pipe flanges (European system)""Selection regulations for steel pipe covers, gaskets and fasteners (European system)"3 Flange sealing surface types and applicable scope| |tt||3.0.1 Flange sealing has two types: raised face (RF) and full face (FF). The size of the flange is not in accordance with the provisions of Chapter 26, Section 8 of HG2059:
The minimum size of the sealing surface of the raised flange is included in the flange thickness. 3.0.2 The applicable pressure and diameter ranges of various sealing surface types are in accordance with the provisions of Table 3.0.2. The applicable scope of Table 3.0.2
Sealing type
Raised face (RF)
Full face (FF) F)
Nominal JPN.MPatbur
DN10-:15G
DN10---150
Flange size
The size of the flange shall be in accordance with the provisions of Figure 4-1 and Tables 4-1~5. Table 4-1PN.6MPa (6bar) threaded steel pipe flangeTable 4-2PN1.0MPa (10bar) threaded steel pipe flangeTable 3PV.6MPa (16bar) threaded steel pipe flangeTable 4-4 PN2.5MPa (25bar) threaded steel pipe flange Table 4-5 PNV4.0MPa (40har) threaded steel pipe flange N
full plane
Figure 4-1 threaded steel pipe flange (Th)
*4-1
connection ruler
PNa.6MPa (bbar) threaded steel pipe flange cover filter flange
[screw inspection hole screw gun thread
screw hole
114.3 210
Center circle diameter
Flange neck
Natural flange
Height measurement
P1.Pa(IUbar)Threaded steel pipe flange
Connection size
Bolt hole center
Bolt hole
Center circle upper diameter
Flange collar
Flange
Flange
Height measurement
Pipe thread rail
Rr, Rp Or NPTbZxz.net
Tube thread size
Rc.Ru. or NPT
(English)
Table 4-3
PN1.6MPa (16bar) threaded steel pipe flange connection size
Screw hole screw inspection hole
Outer diameter center circle diameter
114. 3↓ 225
Screw thread
Flange neck
Legal principle
Theoretical weight
Table 4-4PNz.5MPa/25har) threaded steel pipe flange connection size
Flange bolt hole screw inspection hole
Screw wheel hole
Outer diameter center circle diameter:
33. 71 115
Honglan neck
French principle
On weight
Pipe thread specification
Rc.Rp or NPT
(English leaf)
Pipe thread specification
Rc, Rp or NPT
(English)
Table 4-5PN4.0MPa (40bar) threaded steel pipe flange connection size
Bolt hole
Center circle diameter
Flammable hole
Yunlan neck
Flange principle
On weight
Pipe thread specification
Rc, Rp or NPT
Inch)
Matching pipe screw||tt ||5.0.1 The pipe threads used in threaded flanges are divided into three situations: (1) 55° conical internal thread (Rc) specified in GB7306 (2) 55° cylindrical internal thread (Rp) specified in GB7306: (3) 60° conical pipe thread (NPT) specified in GB/T12716. 5.0.2 When 55° conical pipe thread is used, the outer diameter of the steel pipe used with the DV150 flange should be 165.1mm. When 60° conical pipe thread is used, the outer diameter of the steel pipe used with the DN65 flange should be 73mm, and the outer diameter of the steel pipe used with the DN125 flange should be 141.3mm. 5.0.3 The inner hole pipe thread processing of the flange should make the end of the steel pipe close to but not beyond the flange sealing surface after tightening. 88
Technical requirements
The technical requirements of the flange shall be in accordance with the provisions of HG20603. 7 Maximum non-impact working pressure
The nominal pressure of the flange and the maximum non-impact working force at different temperatures shall comply with the provisions of HG20604. Fastener length
The length of the fasteners (bolts, studs) used shall comply with the provisions of Appendix A of HG20613. Matching regulations
The matching of flanges, gaskets and fasteners shall comply with the provisions of HIG20614. 10 Marking
The marking of flanges shall comply with the provisions of HG20592
Additional notes: Proposal unit, editor unit and main drafter of this standard Proposal unit: Equipment Design Technology Center Station of the Ministry of Chemical Industry Chemical Process Piping Design Technology Center Station of the Ministry of Chemical Industry Editor unit: Equipment Design Technology Center Station of the Ministry of Chemical Industry Main drafter: Ying Daoyan Yu Jun
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