HG 20626-1997 Steel pipe flange welding joint and groove dimensions (American system) HG20626-1997 standard download decompression password: www.bzxz.net

Dimensions of welded joints and grooves of steel pipe flanges (American system)
HG20626-97
1 Subject content and scope of application
This standard specifies the dimensions of welded joints and grooves of steel pipe flanges (American system) connected to steel pipes. This standard is applicable to steel pipe flanges specified in the new H620615. 11
HG20615
Referenced standards
《Steel pipe type, parameters (American system)》 3
Neck welded flanges
The welded joints of the neck flat flanges and steel pipes shall meet the requirements of Figure 3-1 fi 1. 4s
but not greater than the neck thickness bzxZ.net
Figure 3-1
4 Socket welded flanges
The welded joints of the socket welded flanges and steel pipes shall meet the requirements of Figure 4-1. f21.45
but not greater than the neck thickness
Figure 4-1
Neck welding flange
The dimensions of the welding end and the opening of the neck welding flange connected to the steel pipe shall comply with the requirements of Figure 5-1~2. If the thickness of the straight edge section of the neck welding flange exceeds the wall thickness of the steel pipe connected to it by 1In, the straight edge section of the flange shall be thinned at the inner diameter, and the slope of the thinned section shall be less than or equal to 1.3, as required in Figure 53. 37.5°±2.5°
5S s22
A Flange end outer diameter (steel pipe outer diameter):
B--Flange inner diameter (equal to the nominal inner diameter of the steel pipe)52.5
Figure 5-2
S· Flange welding end wall thickness equal to the nominal wall thickness of the steel pipe). Note: When the flange is connected to a ferritic steel pipe with a nominal thickness of ≤4.8mm or a ferrite steel pipe with a nominal thickness of ≤3.2mm, the blunt edge can be eliminated. Steel pipe side
≤1:3
Flange side
6 Large diameter flange
The size of the welded joint and groove of the large diameter flange connected to the steel pipe shall comply with the requirements of Figure 6-1, 37. 6°±2.5#
37. 5°±2.5g
7 Butt welding ring
The size of the welded joint and groove of the butt welding ring of the butt welding loose flange connected to the steel pipe shall comply with the requirements of Figure 7-1: Pipe side
37.5°t2.59
37. 5°±2. 5°
Butt welding ring inverted
Note: The sound of the light ring is 3.2m1 per nominal thickness of the austenitic steel pipe connection, and the edge can be cancelled. Additional notes: This standard proposes the unit, the editor-in-chief and the main drafter proposes the unit: Chemical Industry Ministry of Chemical Industry Process Piping Design Technology Center Station Chemical Industry Ministry of Chemical Industry Equipment Design Technology Center Station
Editor-in-chief: North Ministry of Industry Equipment Design Technology Center Station Chief Drafter: Ying Daopeng Yu Jun
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