HG/T 2140-1991 Glass-lined reducing flange HG/T2140-1991 standard download decompression password: www.bzxz.net

Chemical Industry Standard of the People's Republic of China
Glass reducer flange
Subject content and scope of application
This standard specifies the type, basic parameters, dimensions and technical requirements of glass reducer flanges. HG/T2140-91
This standard applies to glass reducer flanges with nominal pressure (PN) equal to 1.0MPa and medium temperature of -20 to 200C. 2 Reference standard
GB1804 Tolerance and fit without tolerance Limit deviation of differential size GB5780 Hexagon head bolts Grade C
GB5782 Hexagon head bolts Grade A and B
GB61701 Hexagon nuts Grade A and B
ZBG94004 Technical conditions for glass equipment
HG/T2105 Slip-on flanges for glass equipment
3 Types, basic parameters and dimensions
3.1 Threaded hole structure Glass reducing flange (Type A) shall be in accordance with the provisions of Figure 1 and Tables 1 and 2.
Figure Type A
In this standard, PN and DN represent the 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 m.b2sc
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1992-01-01
Note: The table is for the glass before the second. | |tt | |4×M16
4×M12
4×M16www.bzxz.net
4×M16||tt| |4×M16
8×M16
4×M16
8×M16
Reference weight, kg
Note: h in the table is the pre-glazing depth,
HG/T2140-91
PN=1.oPMa
8×M16
8×M20
12×M20
3.2 The spiral hole structure glazing reducer flange (Type B) shall be in accordance with Figure 2 and Tables 3 and 4.
Standard conversion network: mmb280saccem Various standards industry information free download x
4×M16
4x×M16
8×M16
4×M16
8×M16
8×M16
8×M16
4×M16
8×M16
8×M16
8×M16
8×M20
Reference weight, name
Note: Nongzhong is Luoji Town Shangpingding
Standard conversion
HG/T2140 -91
Figure 2 Type B
PN=0.6PMa
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4×M12
4×M12
4xM-12
4×M16
4×M12
4×M16
4×M16
8×M16
8x×M16
8×M16
8×M16
Reference weight, kg
Note: The table shows the thickness before marriage.
3.3 Marking example
HG/T2140-91
PN=1.0PMa
Type A reducing flange, PN is 0.6MPaDN, is 80mm.DN, is 50mm. Marking: Reducing flange PN0.6DN80/50-AHG/T2140--914 Technical requirements
4.1 Material selection, manufacturing, testing and acceptance shall be carried out in accordance with ZBG94004 and this standard. 4.2. The material of the reducing flange is Q235-A or No. 20 steel.nxe,
4×M16
4×M16
4×M16
4×M16
8×M16
4×M16
8×M16
8×M16
8×M16
8×M2 0
8×M20
Reference weight, kg
4.3 The allowable deviation of the center diameter of the bolt hole on the reducing flange and the chord length of the two adjacent bolt holes is ±0.6mm; the allowable deviation of the chord length of any two floating bolt holes is ±1mm,
Standard replacement net rb
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HG/T2140-91
4.4 Finished surface The tolerance grade of the tolerance dimension shall be IT14 as specified in GB1804, and the tolerance grade of the non-machined surface without tolerance dimension shall be IT16.
4.5 The slip-on flange for the reducing flange shall be selected in accordance with HG/T2105. 4.6 The bolt for flange connection: when PN is greater than 0.6MPa and less than or equal to 1.0MPa, it shall be in accordance with GB5782; when PN is less than or equal to 0.6MPa, it shall be in accordance with GB5780. The nut shall be in accordance with GB6170. The gasket shall be selected in accordance with relevant standards. 4.7 The water pressure test pressure Pt shall be selected in accordance with Table 5.
5 Packaging, transportation and storage
5.1 The product shall be accompanied by a packing list, product certificate and product instruction manual. 5.2 It is forbidden to hit it during moving and transportation.
5.3 The exposed pond glass surface shall be firmly wrapped with soft gaskets. 5.4 The product shall be stored indoors. It is not allowed to store or stack it outdoors. Additional notes:
This standard was proposed by China National Chemical Equipment Corporation. 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, and the main drafters of this standard were Li Yijun, Hua Qiuyuan, and Bao Shouyuan. P
This standard refers to the German national standard DIN2873-1982 "Steel porcelain flanging pipes and fittings with nominal pressures of 10 bar and 16 bar",
Standard fee exchange network rbeee
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