This standard specifies the type, size, technical requirements and relevant use regulations of the flat-welded steel pipe flange with neck (European system). This standard is applicable to the flat-welded steel pipe with neck with nominal pressure PN 0.6 MPa (6 bar)-4.0 MPa (40 bar). The flat-welded steel pipe flange with neck specified in this standard is applicable to the two steel pipe outer diameter series AM specified in FIG 20.592. HG 20594-1997 Flat-welded steel pipe flange with neck (European system) HG20594-1997 Standard download decompression password: www.bzxz.net

Neck-welded steel pipe flange
(European system)
HG20594-97
1 Content and applicable scope
This standard specifies the type, size, technical requirements and relevant use regulations of neck-welded steel pipe flange (European system). This standard applies to neck-welded steel pipe flanges with nominal pressure PN0.6MPa (6bar) ~~4.OMPa (40bar). The neck-welded flange specified in this standard is applicable to the two steel pipe outer diameter series A and B specified in HG20592. 33
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HG20592
HG20603
HG 20604
HG20605
HG 20613
HG20614
Reference standards
"Steel pipe flange types, parameters (European system)" "Steel pipe flange technical conditions (European system)" "Steel pipe flange pressure-temperature grade (European system)" "Steel pipe flange welding joints and opening dimensions (European system)" "Steel pipe flange drawing (European system) Steel pipe flange, gasket, fastener selection regulations (European system)" http://foodmatea.net
Flange sealing surface type and applicable scope
3.0.1 The sealing surface types of flanges include raised face (RF), concave and convex face (MFM), grooved face (TG), and full flat face (FF). Its size and selection are in accordance with the provisions of Chapter 6 and Chapter 8 of HG20592. The sealing surface dimensions of the raised face, double convex face, and grooved face flanges are included in the flange thickness ℃. 3.0.2 The applicable pressure and diameter ranges of flanges of various sealing surface types shall be in accordance with the provisions of Table 3.0.2. Applicable range Sealing surface type Refreshing surface (RF) Surface (MFM) Rolling surface (TG) Flat surface (FF) Nominal pressure PN, MPabar DN10~300 DN10-300 Nominal pressure PN, MPabar DN10~600 DN10-600 DN10-600 DN10-600 Cover size Flange size shall be in accordance with the provisions of Figure 4-1 and Tables 4-1~5. Table 4-1 PNo. 6MPa (6bar) flat weld steel pipe flange with neck Table 4-2 PN1.0MPa (10bar) flat weld steel pipe flange with neck Table 4-3 PN1.6MPa (16bar) flat weld steel pipe flange with neck Table 4-4 PN2.5MPa (25bar) flat weld steel pipe flange with neck Table 4-5 PN4.0MPa (40bar) flat weld steel pipe flange with neck 36
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Figure 4-1 Flat weld steel pipe flange with neck (SO) bt
Outer diameter of flange
Table 4-1 PNo. 6MPa (6bar) flat buried steel pipe flange connection size
Bolt hole center diameter of bolt hole
Bolt hole
200 219.1
and body network bttr
flange inner diameter
flange neck
flange thickness
weight
steel pipe outer diameter
150168. 3
350j355.9
bladder 4 -2FN1. MPaL10bar>with strong flat welding steel pipe flange connection size
flange screw inspection hole bolt hole
outer diameter center circle diameter
httr
flange inner diameter
flange neck
commercial width
flange thickness
weight
steel pipe outer diameter
150168. 3
Table 4—3PN1.6MP (16bar) flat-welded steel pipe flange connection dimensions
Flange bolt hole Center bolt hole Bolt hole
Center μ diameter
Flange inner diameter
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Flange neck
Flange slope
Depth width
Flange thickness
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Steel pipe outer diameter
NO 188.9:
123 139. 7
300|323:9
150: 157
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Table 4—4PN2.5MPa (25bar) flange connection dimensions for flat steel pipe with neck
Flange bolt hole bolt hole
Outer diameter center circle diameter
httr
Flange flange inner diameter
110:
Flange neck
Flange opening
Flange thickness
Height width
Weight
Outer diameter of steel pipe
Table 4—5PN4.0MPa (40bar) flange connection dimensions for flat steel pipe with strong flat welding
Bolt hole bolt hole
Outer diameter center circle diameter
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Flange flange inner diameter
34 221
M39×3
Flange neck
Flange groove
Flange principle
Height
Theoretical weight
Technical requirements
The technical requirements of flanges shall be in accordance with the provisions of HG20603. 6 Maximum non-impact working pressure
The nominal pressure of flanges and the maximum non-impact working pressure at different temperatures shall be in accordance with the provisions of HG20604. 7 Welding joints and grooves
The dimensions of welding joints and grooves of the total and steel pipes shall be in accordance with the provisions of HG20605. Fastener length
The length of the fasteners (bolts, studs) used shall be in accordance with the provisions of Appendix A of HG 20613. Matching provisions
The matching of gaskets and fasteners shall be in accordance with the provisions of HG20614. 10
The marking of flanges shall be in accordance with the provisions of HG20592.
Additional Notes: This standard proposer, editor and main drafter Proposer: Equipment Design Technology Center of Ministry of Chemical Industry Chemical Process Piping Design Technology Center of Ministry of Chemical Industry Editor: Equipment Design Technology Center of Ministry of Chemical Industry Drafting: Ying Daoyan Yu Jun
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