HG/T 2053-1991 Glass-lined equipment manhole flange HG/T2053-1991 standard download decompression password: www.bzxz.net

Chemical Industry Standard of the People's Republic of China
Sugar Glass Equipment
1 Subject Content and Scope of Application
Manhole Flange
HG/T2053-91
This standard specifies the type, basic parameters, main dimensions and technical requirements of manhole flanges for pond glass containers. This standard is applicable to pond glass containers 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℃.
Referenced standards
Technical conditions for high-quality carbon structural steel
GB700 Carbon structural steel
GB1804 Tolerances and fits Limit deviations of dimensions without tolerances GB3323 Radiographic quality classification of steel fusion welded butt joints JB1614 Test methods for mechanical properties of welded joints of pressure components of boilers JB3964 Welding procedure assessment for pressure vessels
ZBG94004 Technical conditions for glass equipment
HG/T2050 Gaskets for sugar glass equipment
3 Types, basic parameters and main dimensions
3.1 Manhole flange types are divided into elliptical and circular, and the nominal pressure is divided into three pressure levels of 0.25MPa, 0.6MPa and 1.0MPa. The main dimensions are shown in Table 1 and Figure 1.
Table "Dimension table
Manhole flange type||tt ||Oval
Nominal size
350×250
400×300
Note: 1.e is the minimum size, the actual size should match the thickness of the punched manhole. 2. The ellipse is the ellipse made by the four-center method, 3. The groove is the recommended size for manual welding,
Approved by the Ministry of Chemical Industry of the People's Republic of China on July 6, 199180
Weight, kg|| tt||1992-01-01 implementation
3.2 Marking
Marking example:
HG/T2053-91
For round manhole flange with PN of t.MPa
nominal pressure 1.0MPa, nominal size 400×300, oval manhole flange for glass equipment, marking: manhole flange PN1.0-400×300HG/T2053-— 91 Nominal pressure 0.25MPa, nominal size @450 round manhole flange for sugar glass equipment, mark: manhole flange PN0.25-450 HG/T2053-914 Technical requirements
4.1 The materials used to manufacture manhole flanges shall be selected according to ZBG94004, 10, 15 or Q235-A. The chemical composition of Q235-A materials shall comply with the provisions of GB700, and the carbon content shall be less than 0.19%. The chemical composition of 10 and 15 steel materials shall comply with the provisions of GB699. Its mechanical properties are in accordance with Table 2.
4.2 The manhole flange shall not have shrinkage holes, delamination, cracks, non-metallic inclusions and other defects that reduce the flange strength and flange connection reliability.
4.3 Except as specified, the accuracy of the un-toleranced dimensions of the machined surface shall be in accordance with the IT14 grade accuracy specified in GB1804. 4.4 The clips for flange connection shall adopt HG/T2054 —91, gasket adopts HG/T2050-91.81
Q235-A
HG/T2053—91
Tensile strength: MPa
4.5 Manhole flange is made of bent steel.
Yield point, MPa
Elongation 8, %bzxZ.net
4.5.1 Welds should be subjected to non-destructive testing, using 100% x-ray testing, x-ray testing The damage should comply with the level II of GB3323: 4.5.2 Before manufacturing, the flange must be evaluated for welding process. The welding process evaluation shall be carried out in accordance with the provisions of JB3964. The welding test plate shall be carried out in accordance with JB1614. Full penetration double-sided butt welding shall be adopted. 4.5.3 The butt joint of the flange weld shall be marked. 4.6 The flange surface on the front of the pond glass shall not have obvious scratches and pits, and its depth shall not exceed 0.5mm. The arc connection shall be smoothly transitioned and shall not have edges and corners.
5 Packaging, transportation and storage
5.1 Flanges shall be bundled in a certain number and shall be firmly fixed. 5.2 The product shall be accompanied by a packing list, product certificate and product instruction manual. 5.3 The product shall be stored indoors and shall not be stored or stacked in the open air. Additional notes:
This standard is proposed by China Chemical Equipment Corporation and is under the jurisdiction of the National Technical Committee for Standardization of Sugar Glass Equipment. This standard was drafted by the Shanghai Pharmaceutical Design Institute of the State Drug Administration. The main drafters of this standard are Jiang Yanjun, Fang Yijun and Hua Qiuyuan. This standard refers to the German national standard DIN28139-1983 "Hand holes, manholes, mounting holes and connection dimensions for welded parts on glass containers connected by clips", 82
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