This standard specifies the T (type, dimensions, technical requirements and relevant use regulations of socket welding steel pipe flanges (American system). This standard is applicable to socket welding steel pipe flanges with nominal pressure PN 2.0 MPa (Cass 150) to 26.0 MPa (Class 1500). HG 20619-1997 Socket welding steel pipe flange (American system) HG20619-1997 Standard download decompression password: www.bzxz.net

Socket welding steel pipe flange
(American system)
HG 20619-97
Subject content and scope of application
This standard specifies the type, size, technical requirements and relevant use regulations of socket welding steel pipe flange (American system). This standard is applicable to socket welding steel pipe flanges with nominal pressure PN2.0MPa (Class150)~~26.0MPa (Class1500).
IIG20615
HG20617
HG20624
HG20625
HG20626
HG20634
HG20635
Referenced standards
《Types and parameters of steel pipe flanges (American system)》《Neck-welded steel pipe flanges (American system)》《Technical conditions for steel pipe flanges (American system)》《Pressure of steel pipe flanges Force-Temperature Grade (American System)" "Dimensions of Welded Joints and Grooves of Steel Pipe Flanges (American System)" "Fasteners for Steel Pipe Flanges (American System)" "Provisions for Selection of Steel Pipe Flanges, Seals, and Fasteners (American System)" Flange Sealing Surface Types and Scope of Application
3.0.1 The sealing surface types of flanges include wide surface (RF), concave and convex surface (MFM), grooved surface (TG), and ring joint surface (RJ). Their sizes and selections are in accordance with the provisions of Chapter 6 and Chapter 8 of HG20615. When PN≤5.0MPa (Class300), the height of the raised platform f of the raised face flange is included in the flange thickness C: When PN11.0MPa (Class600), the height of the raised platform f of the case flange is not included in the flange thickness C, and the height of the raised platform f of the concave and convex surface and grooved surface flanges is not included in the flange thickness C. The height of the raised platform E of the ring joint surface flange is not included in the flange thickness C. 3.0.2 The applicable pressure and diameter ranges of flanges with various sealing surface types shall be in accordance with the provisions of Table 3.0:2. Table 3.01.2 Applicable range
Nominal EPN.MPa (Class)
Sealing surface type
Sinus surface (RF)
Concave and convex surface (MFM)
Groove surface (TG)
Ring joint surface (RJ)
(Class150)
DN25～80
(Clags 300)
(Class 600)
DN15-8[)
DN15～80
DN15-80
DN1580
(Class 900)
(Class 1500)
DN15~-65
DN15~65
DN15~65
DN15~65
Flange size
Flange size shall be in accordance with Figure 41 and Tables 4-1~5. Table 4-1PN2.0MPa(Class150) socket welding pipe flangeTable 4-2PN5.0MPa(Class300) socket welding steel pipe flangeTable 4-3PN11.0MPa(Class600) socket welding steel pipe flangeTable 4-4Pv15.0MPa(Class900) socket welding steel pipe flangeTable 4-5.PN26.0MPa(Class1500) socket welding steel pipe flangeFor socket welding flanges with PN≥11.0MPa(Ca600), users shall indicate the wall thickness or grade of the steel pipe used in ordering and marking.
PN≤5.0MPa(Ctass300)The inner diameter of the socket welding flange is equivalent to the wall thickness grade of the steel pipe Sch40.346
PV≤5.OMPRaised face (RF)）
PNI1.OMFaRaised face (RF）
Figure 4-1 Socket welding steel pipe flange (SW)
Ring joint surface (RJ)
Figure 4-1
(Continued)
Nominal diameter
Table 4—1PN2.mMPa(CIa150)Socket welding steel pipe flange connection size
Screw hole center
[Screw drop flower
Bolt hole
Outer diameter valve diameter
76-11180
s8-9;190
Nominal diameter
DN outer diameter
Table 4—2
Flange flange
Inner diameter
Socket hole
Flange neck
P5.0MPa(Cla 300) Socket welding steel pipe flange connection size
bolt hole
center circle diameter
nominal diameter, steel pipe:
screw hole
socket hole
PNH1.MTu (Class U) socket welding steel pipe flange reverse connection size
NPS: DN outer diameter flange
screw hole
screw bolt
center circle diameter
Note: flange inner mark B not specified, according to order requirements or according to HG Appendix A of 20117 determines: socket hole
flange neck
flange principle
weight
flange neck.flange
flange principle
weight
nominal diameter
NPS iDN
Table 4-4PN15. MPa(C1ass 90))socket welding steel pipe flange connection dimensions
outer diameter flange
bolt hole center circle diameter
bolt hole
bolt hole
Note: flange inner diameter B not specified shall be determined according to ordering requirements or according to Appendix A of HG21617socket holewwW.bzxz.Net
PN26.0MPa(C1asss1500)socket welding steel pipe flange connection dimensionsTable 4- 5
Nominal diameter
Connection size
Outer diameter Standard threaded hole
Bolt hole
Outer diameter Center circle diameter
5060.3215
Standard thread
Thickness Internal diameter
[11,51
Note: Unspecified standard deviation Internal diameter B1 shall be determined according to the ordering requirements or according to Appendix A of HG 20617, 350
Bearing hole
Standard "neck
Standard principle
Height weight
Standard flange neck flange
Flange principle
5 Technical requirements
The technical requirements for flanges shall be in accordance with the provisions of HG20624. 6 Maximum non-impact working pressure
The nominal pressure of the flange and the maximum non-impact working pressure at different temperatures shall comply with the provisions of HG20625. 7 Welding joints and grooves
The dimensions of the welding joints and grooves between flanges and steel pipes shall comply with the provisions of HG 20626. 8 Fastener length
The length of the fasteners (bolts, studs>I) used shall comply with the provisions of Appendix A of HG20634. 9 Matching regulations
The matching of flanges, gaskets and fasteners shall comply with the provisions of HG20635. 10 Marking
The marking of flanges shall comply with the provisions of HG20615.
Additional notes: The proposing unit, chief editor unit and main drafter of this standard Proposing unit: Chemical Process Piping Design Technology Center Station of the Ministry of Chemical Industry Equipment Design Technology Center Station of the Ministry of Chemical Industry
Chief editor unit: Equipment Design Technology Center Station of the Ministry of Chemical Industry Main drafter: Xu Daoyan Yu Han
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