HG/T 2139-1991 Glass-lined eccentric reducer HG/T2139-1991 Standard download decompression password: www.bzxz.net

Chemical Industry Standard of the People's Republic of China
Tang Glass Eccentric Reducer
Subject Content and Scope of Application
This standard specifies the type, basic parameters, dimensions and technical requirements of Tang Glass Eccentric Reducer. HG/T2139
This standard is applicable to the nominal pressure: (PN) equal to or less than 1.0MPa, medium temperature: A type eccentric reducer is -20C to 200℃, B type, C type is -10C to 200C. 2 Reference StandardsbzxZ.net
GB1804 Tolerance and Fit||t t||Limit deviation of dimensions without tolerance
GB5780 Hexagon head bolts
GB5782 Hexagon head bolts Grade A and B
GB61701 Hexagon nuts Grade A and B
GB9439 Grey cast iron parts
ZBG94004 Technical conditions for glass equipment
HG/T2105 Slip-on flanges for glass equipment
3 Types, basic parameters and dimensions
3.1 The eccentric reducer (Type A) for steel glass connected by slip-on flanges shall be in accordance with the provisions of Figure 1 and Table 1.
Figure 1 Type A
*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 cm Various standards Industry data free download
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1992-01-01 Implementation
HG/T2139-91
Note: S in the letter and table refers to the thickness of the cast iron glass before the whole. 3.2 Cast iron glass eccentric reducer (type B) connected by slip-on flange shall comply with the provisions of Figure 2 and Table 2.
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Four types of standard industry equipment free of charge
Reference weight, kg
PN/MPa
HG/T2139-91
Figure 2B type
Approved for replacement
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Reference weight, kg
PN/MPa
Note: S in the four and the table refers to the storage glass front wall HG/T2139-91
3.3 Cast iron eccentric reducer (type C) for cast iron flange connection is in accordance with Figure 3 and Table 3
Figure 3C type
Approved for replacement
Reference weight. k name
PN/MPa
150160
HG/T2139-91
110130
175210148170
1329.5200
178200
265202225
300/375
31233512x17.3
Note: S in the figure and table refers to the sugar glass front raw material, 3.4 marking example
258280
A type pond glass eccentric reducer, PN is 0.6MPaDN, is 80mm, DN, is 50mm. Mark: Eccentric reducer PN0.6DN80/50-A: HG/T2139--914 Technical requirements
4.1 Material selection, manufacturing, testing and acceptance shall be carried out in accordance with ZBG94004 and this standard. 4.2 Manufacturing tolerance and allowable deviation
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Reference quantity
HG/T2139-91
4.2.1 The materials of Type B and Type C reducers shall comply with the relevant provisions of GB9439. 4.2.2 The allowable deviation of the center circle diameter of the bolt hole and the chord length of two adjacent bolt holes on the flange of Type C feed reducer is ±0.6mm, and the allowable deviation of the chord length of any two bolt holes is ±1mm. 4.2.3 The tolerance grade of the un-toleranced dimensions of the machined surface shall comply with the IT14 grade specified in GB1804, and the tolerance grade of the un-toleranced dimensions of the non-machined surface shall comply with the IT16 grade.
4.2.4 The allowable deviation of the length L of the reducer shall be in accordance with the provisions of Table 4. Table 4
65~100
65~200
4.3 The slip-on flanges for type A and type B reducers shall be selected in accordance with HG/T2105. 4.4 Bolts for flange connection: When PN is greater than 0.6MPa and less than or equal to 1.0MPa, they shall be in accordance with the provisions of GB5782: When PN is not greater than 0.6MPa, they shall be in accordance with the provisions of GB5780, nuts shall be in accordance with the provisions of GB6170, and gaskets shall be selected in accordance with relevant standards. 4.5 The water pressure test pressure and the maximum working pressure at different temperatures shall be selected in accordance with Table 5. Table 5
Test pressure
Packaging, transportation and purchase 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 touch or shoot during handling and transportation.
5.3. The glass surface of the outer jump pond is sealed with soft gaskets and blind plates. 5.4 The product should be stored indoors. Open-air storage or stacking is not allowed. Additional notes:
This standard is proposed by China National Chemical Equipment Corporation. This standard is under the jurisdiction of the National Technical Committee for Glass Equipment Standardization. This standard is drafted by the Shanghai Pharmaceutical Design Institute of the State Drug Administration. MPa
The maximum working pressure P at the following temperature
120℃
The main drafters of this standard are Li Yijun, Hua Qiuyuan, and Bao Aiyuan. This standard A-type reducer refers to the German national standard DIN2873-1982 "Steel sugar porcelain flanged pipes and fittings with nominal pressures of 10 bar and 16 bar".
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