HG/T 2134-1991 Glass-lined 90° elbow HG/T2134-1991 Standard download decompression password: www.bzxz.net

Chemical Industry Standard of the People's Republic of China
90° Glass Elbow
Subject Content and Applicable Range
HG/T 2134-91
This standard specifies the type, basic parameters, dimensions and technical requirements of glass 90° elbows. This standard is applicable to glass 90° elbows with nominal pressure (PN) equal to or less than 1.0MPa and medium temperature: -20°C to 200°C for type A elbows and -10°C to 200°C for type B and type C elbows. 2 Reference Standards
GB1804 Tolerances and Fits Limit Deviations of Dimensions Without Tolerance Notes GB5780 Hexagonal Bolts Grade C
GB5782 Hexagonal Bolts
Grades A and B
GB61701 Hexagonal Nuts 'A and B grade
GB9439 gray iron parts
YB231 chainless steel pipe
ZBG94004 pond glass equipment technical conditions
HG/T2105 glass equipment slip-on flange
3 types, basic parameters and dimensions
3.1 steel sugar glass 90° elbow (type A) connected by rear flange according to the provisions of Figure 1 and Table 1,
*PN and DN in this standard represent nominal pressure and international diameter respectively, approved by the Ministry of Chemical Industry of the People's Republic of China on August 19, 1991 and implemented on January 1, 1992
57 × 3. 3
73 × 4
89 × 4
108×4
133×4
219×6
273×8
HG/T2134--91
Figure 1A type
refers to the front wall of the glass,
Note: S in the figure and in the figure,
PN-0.6MPaPN=1.0MPa
Reference weight, kg
PN-0.6MPa
PN-1.0MPa
HG/ T 2134 91
3.2 Cast iron glass 90° elbow (type B) connected by slip-on flange According to the provisions of Figure 2 and Table 2,
Figure 2 Type B
PN/MPa
56×7.5
86×8.5
106×9
132×9.5
158×10
214×11
262×12Www.bzxZ.net
Properties: The 5 in the letter and the table refer to the front wall of the glass, R
will be tested,
HG/T 2134-91
3.3 Cast iron glass 90° elbow (C Type) According to Figure 3 and Table 3,
Figure 3 Type
PN/MPa
Dg× $
56 × 7. 5
106×9
132×:9, 5
158× 10
214×11
262 × 12
Note: The S in the figure refers to the front wall of the sugar glass. Original 3.4 Marking example
Type A 90 elbow PN is 0.6MPaDN is 50mm110
Mark: 90 elbow PN 0.6 DN.50-A HG/T 2134-914 Technical requirements
41 Material selection, manufacturing, testing and acceptance shall be carried out in accordance with ZBG94004 and this standard. 42 The steel elbow in type A elbow shall be manufactured and accepted in accordance with the requirements of YB231. 4.3 Manufacturing tolerance and allowable deviation
4 x 13. 5
4× 17. 5
8× 17. 5
B × 17. 5
Refer to HG / T 2134 -- 91
4.3.1 Type B and C elbows, materials shall comply with the relevant provisions of GB9439. 4.3.2 The allowable deviation of the center diameter of the bolt hole on the C-type elbow flange and the chord length of the two adjacent bolt holes is ±0.6m, and the allowable deviation of the chord length of any two bolt holes is ±1mm.
4.3.3 The tolerance grade of the unnoted tolerance dimension of the working surface shall be IT14 grade specified in GB1804, and the tolerance grade of the unnoted tolerance dimension of the non-processing surface shall be IT16 grade.
4.3.4 The allowable deviation of the length L of the joint shall be specified in Table 4. Table 4
125~200
4.4 The slip-on flange for type A and type B elbows shall be selected according to HG/T2105. 4.5 Bolts for flange connection: When PM is greater than 0.6MPa and less than or equal to 1.0MPa, it shall be in accordance with the provisions of GB5782: When PN is less than or equal to 0.6MPa, it shall be in accordance with the provisions of GB 5780, nuts shall be in accordance with the provisions of GB6170, and gaskets shall be selected according to relevant standards. 4.6 The water pressure test pressure and the maximum working pressure under different humidity conditions shall be selected according to Table 5. 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 It is prohibited to touch the glass during transportation and transport. 5.3 The exposed glass surface shall be sealed with soft gaskets and blind plates. 5.4 The product shall be stored indoors. Open-air storage or stacking is not allowed. 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 was drafted by Shanghai Pharmaceutical Design Institute of State Drug Administration. The main drafters of this standard are Li Yijun, Hua Qiuyuan and Bao Aiyuan. The maximum working pressure P under the following pressure range is used in this standard. The A-type elbow is based on the national standard DTN2873-1982 "Steel ceramic flanged pipes and fittings with nominal pressure of 10 bar and 16 gauge". This standard will be implemented from the date of implementation. The original standard HG 5-256-79 "Glass 90° Elbow" issued by the Ministry of Chemical Industry of the People's Republic of China is invalid.
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