HG/T 2141-1991 Glass-lined flange cover HG/T2141-1991 standard download decompression password: www.bzxz.net

Chemical Industry Standard of the People's Republic of China
Glass Flange Cover
1 Subject Content and Applicable Models
This standard specifies the type, basic parameters, dimensions and technical requirements of glass flange covers. Cover
HG/T2141-91
This standard applies to pond glass flanges with a nominal pressure (PN) equal to or less than 1.0MPa and a medium temperature of -20C to 20QC 2 Reference standards
GB1804 Tolerances and fits Limit deviations of dimensions without tolerances GB5780 Hexagon head bolts Grade C
GB5782-Hexagon head bolts Grades A and B
GB.61701 Hexagon nuts Grades A and B
ZBG94004 Technical conditions for glass equipment
3 Types, basic parameters and dimensions
3.1 Steel pond glass flange cover
As specified in Figure 1 and Table-1,
*PN and DN in this standard represent nominal pressure and nominal diameter respectively. Approved by the Ministry of Chemical Industry of the People's Republic of China on August 19, 1991, standard fee control network.b
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Implementation on January 1, 1992
PN is 0.6MPa
Marking example
Glass flange cover, PN is 0.6MPa
HG/T2141-91
Reference weight
DN is 50mm
Mark: Flange cover P0.6DN50HG/T2141-91 Technical requirements
PN is 1.0 MPawwW.bzxz.Net
4.1 Material selection, manufacturing, testing and acceptance shall be carried out in accordance with ZB, G94004 and this standard. 158
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4.2 The material of the flange cover is Q235-A or No. 20 steel. 4.3 The allowable deviation of the center diameter of the bolt hole on the flange cover and the chord length of two adjacent bolt holes is ±0.6mm; the allowable deviation of the chord length of any two bolt holes is ±1mm.
4.4 Bolts for flange cover connection: When PN is greater than 0.6MPa and less than or equal to 1.0MPa, follow the provisions of GB5782: When PN is less than or equal to 0.6MPa, follow the provisions of GB5780, nuts follow the provisions of GB6170, and gaskets are selected according to relevant standards. 4.5 The water pressure test pressure is in accordance with Table 2.
5 Packaging, transportation and extended storage
5.1 The product should have a packing list, product certificate and product instruction manual 5.2 Do not bump during moving and transportation,
5.3 Wrap the outer glass surface with soft objects to secure it, 5.4 The product should be stored indoors, and it is not allowed to be stored or placed outdoors, 60
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Additional instructions:
This standard is proposed by China Chemical Equipment Corporation HG/T2141-91
This standard is under the jurisdiction of the National Glass Equipment Standardization Technical Committee. This standard was drafted by the Shanghai Pharmaceutical Design Institute of the State Drug Administration. The main drafters of this standard are Li Yijun, Hua Qiuyuan, and Yi Aiyuan. This standard refers to the German national standard DIN2873--1982 "Steel Glass Flanged Pipes and Fittings with Nominal Pressures of 10 Bar and 16 Bar".
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