HG/T 2049-1991 Glass-lined equipment high-neck flange HG/T2049-1991 standard download decompression password: www.bzxz.net

Chemical Industry Standard of the People's Republic of China
High-neck flange for glass equipment
Subject content and scope of application
HG/T 2049-91
20010255
This standard specifies the type and basic parameters of high-neck flanges for glass equipment. Mainly the dimensions and technical requirements. This standard is applicable to glass equipment with a nominal pressure less than or equal to 1.0MPa and a medium temperature higher than -20 and lower than or equal to 200℃.
2 Reference standards
GB699 Technical conditions for high quality carbon structural steelwwW.bzxz.Net
Carbon structural steel
GB1804 Tolerances and fits, limit deviations of dimensions without tolerances GB3323
Radiography and classification of steel fusion welded butt joints JB1614 Mechanical properties test method for welded joints of pressure components of boilers JB3964H Welding procedure assessment for pressure vessels
ZBG94004 Technical conditions for glass equipment
HG/T2050-91 Heat exchanger for glass equipment
H/T2054-9F Glass equipment - ##
3 Types, basic parameters and main dimensions
3.! Type, basic parameters and dimensions see Figure 1, Table 145
PNSO.6MFa
PN≤1.0MPa
Approved by the Ministry of Chemical Industry of the People's Republic of China on July 199116
Implementation on January 1, 1992
Nominal pressure PN
Nominal diameter DW
500488
600588
900888
1000988
11 001085
112161198
13101298
14201408
1s201508
1570[155#
17301718
18801868
00OORR||tt| |1100088
12101195
13101298
14201408
G /3 2049 -91
Table 1 Size table
121 34
141 34
,·R
Note: The numbers listed in the table are only the numbers of the automatic welding city specified, ground class
30°±2.5°
30 *±2. 5\
1 C-2m
Reference weight
3.2 Marking
Marking example:
G/T 2049 -
Tang glass equipment high neck flange has a nominal positive force of 1.0MP and a nominal diameter of 1000mm. Marked as: High-neck flange FN10DNE000HGT2049--914 Technical requirements
4.1 The material for high-neck flange is selected according to ZBG94004 10, 15 or Q235-A. The chemical composition of Q235-A material shall comply with the provisions of GB700, and the carbon content shall be less than 0.19%. The chemical composition of 10, 75 steel materials shall comply with the provisions of GB699. Mechanical properties are in accordance with Table 2.
4.2 High-neck flanges shall not have shrinkage holes, delamination, cracks, non-metallic inclusions and other defects that can reduce the strength and connection reliability of the flange.
4.3 Except as specified, the precision grade of the tolerance dimension shall be Ir14 grade precision specified in G1804. 4.4 The height II value tolerance of the high-neck cover is ±0.5mm2
Q235-A
Tensile strength, MPa
Lifu point es, Mra
4.5 The flange connection card adopts HGT2054, and the gasket adopts TIC/T2050. 4.6 When the high-neck flange is made of steel bending, the following requirements shall also be met. Length, %
4.6.1 Before manufacturing, the flange shall be welded! Technical assessment, welding worker assessment shall be carried out according to JB3964, and welding test plate shall be carried out according to JB1614. 1 Full penetration double-sided butt welding: 4.62 The weld shall be non-destructively inspected, using 100% radiographic flaw detection, and the radiographic flaw detection shall comply with the II level specified in C3323. 4.6,3 The flange butt weld shall be marked. 4. There should be no scratches on the front flange surface, no deep cuts, smooth joints, and no corners.
4.8 The outer edge of the flange should have a nominal pressure mark stamped on it 5 Packaging, transportation and storage
5.1 High-neck flanges should be tied flat in groups.
5.2 Avoid collisions during handling and transportation. 5.3 The product should be accompanied by a packing list, product certificate and product convenience. 5.4 The product should be stored in an airtight container and not in the open air. 3
Additional remarks:
This standard is issued by China National Chemical Equipment Corporation and issued by FG/T 2040-91
This standard is under the jurisdiction of the National Technical Committee for Standardization of Glass Equipment. This standard is drafted by the State Administration of Medicine and the main drafters of this standard are Hua Qiuyuan, Li Yijun and Xing Wenxi. From the date of implementation of this standard, the standard 11G5-260-79 "High-neck flanges for sugar glass equipment" issued by the Ministry of Chemical Industry of the People's Republic of China shall be used as the standard.
This standard refers to the German national standard DIN28139-1983 "Welding parts on glass containers, flanges connected by clamps, connection dimensions"
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