HG/T 2135-1991 Glass-lined 180° elbow HG/T2135-1991 Standard download decompression password: www.bzxz.net

Chemical Industry Standard of the People's Republic of China
180° Glass Elbow
Subject Content and Scope of Application
HG/T2135-91
This standard specifies the type, basic parameters, dimensions and technical requirements of 130° glass elbows. This standard is applicable to 180° glass elbows with nominal pressure (PN) equal to or less than 1.0MPa and medium temperature: -20℃ to 200℃ for type A elbows and -10℃ to 200℃ for type B and type C elbows. 2 Reference Standards
Tolerance and Fit Limit Deviation of Dimensions Without Tolerance GB1804||tt ||GB5780
GB5782
Hexagon head bolts, grade C
Hexagon head bolts, grade A and B
Type 1 hexagon nuts, grade A and B
GB6170
GB9439
Grey cast iron
Seamless steel pipe
ZBG94004 Technical conditions for glass equipment
HG/T2105 Lap-joint flanges for glass equipment
3 Types, basic parameters and dimensions
3.1 The steel 180° elbow (type A) for glass-breaking connected by a slip-joint flange shall be in accordance with the requirements of Figure 1 and Table 1.
Figure 1 Type A
*PN and DN in this standard represent European pressure and nominal diameter respectively. Approved by the Ministry of Chemical Industry of the People’s Republic of China on August 19, 1991 26
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108×4
133×4
219×6
273×8
Note: S in the figure and table refers to the front thickness of the glass HG/T2135-91
PN-1.0MPa
PN-0.6 MPa
3.2 The cast iron pond glass 180° elbow (Type B) connected by the slip-on flange shall be in accordance with the provisions of Figure 2 and Table 2.
Figure 2 Type B
PN/MPa
106×9
158×10
214×11
262×12
Note: S in the figure and attenuation refers to the thickness of the front wall of the glass, R
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PN=0.6MPaPN-1.0MPa
Reference weight, kg
HG/T2135-91wwW.bzxz.Net
3.3 Flange-connected iron pond glass 180° elbow (C type) is in accordance with Figure 3 and Table 3,
Figure 3 Type C
PN/MPa
106×9
158×10| |tt||214×11
262×12
Note: S in the figure and table refers to the front thickness of the sugar glass. 3.4 Marking example
Type A pond glass 180° elbow PN is 0.6MPaDN is 50mmD
Marking: 180° elbow PN0.6DN50-AHG/T2135--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 steel pipes in the A-type elbows shall be manufactured and accepted according to the requirements of YB231. 4.3 Manufacturing tolerance and allowable deviation 4.3.1 For B-type and C-type elbows, the materials shall be set according to the relevant provisions of GB9439. 4.3.2 The allowable deviation of the center circle diameter of the bolt hole on the flange of C-type elbow and the chord length of two adjacent bolt holes is ±0.6mm, and the allowable deviation of the chord length of any two bolt holes is ±1mm. 4.3.3 The tolerance grade of the unmarked tolerance size of the machined surface shall be IT14 grade specified in GB1804, and the tolerance grade of the unmarked tolerance size of the non-machined surface shall be IT16 grade. The allowable deviation of the length L of the elbow of HG/T2135 shall be as specified in Table 4. Table 4
65~100
4.4 The slip-on flanges used for type A and type B elbows shall be selected in accordance with HG/T2105. 125~200
4.5 Bolts for flange 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 in accordance with relevant standards. 4.6 The water pressure test pressure and the maximum working pressure at different temperatures shall be selected in accordance with Table 5. Table 5
Packaging, transportation and storage
Test pressure
5.1 The product shall be accompanied by a packing list, product certificate and product instruction manual. 5.2
A collision is prohibited during handling and transportation
The exposed pond glass surface is sealed with a soft gasket and a blind plate. Products should be stored indoors, and outdoor storage or stacking is not allowed. 5.4
Additional Notes:
This standard is proposed by China National Chemical Equipment Corporation and is under the jurisdiction of the National Technical Committee for Standardization of Glass Equipment. This standard is drafted by the Shanghai Pharmaceutical Design Institute of the State Drug Administration. The main drafters of this standard are Li Yibo, Hua Qiuyuan, and Bao Aiyuan. MPa
Maximum working pressure P at the following temperatures
120℃
200℃
This standard A-type elbow 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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