HG/T 2131-1991 Glass-lined 30° elbow HG/T2131-1991 Standard download decompression password: www.bzxz.net

Chemical Industry Standard of the People's Republic of China
Tang Glass 30°
1 Subject content and scope of application
HG/T2131-91
This standard specifies the type, basic parameters, dimensions and technical requirements of Tang Glass 30° elbows. This standard is applicable to Tang Glass 30° elbows with nominal pressure: (PN) equal to or less than 1.0MPa, medium temperature: -20 to 200℃ for Type A elbows, -10 to 200℃ for Type B and Type C elbows. 2 Reference standards
GB1804
Tolerances and fits Limit deviations of tolerance dimensions without notes GB5780
Hexagon head bolts, grade C
Hexagon head bolts, grade A and B
GB5782
GB61701 Hexagon nuts, grade A and B
GB9439
Grey cast iron parts
Seamless steel pipeswww.bzxz.net
ZBG94004 Technical conditions for glass-inserting equipment
HG/T2105 Slip-on flanges for glass-inserting equipment
3 Types, basic parameters and dimensions
3.1 The 30° elbow (type A) for steel glass-inserting connected by slip-on flanges shall be in accordance with the provisions of Figure 1 and Table 1.
Figure 1 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, and implemented on January 1, 1992. 108×4, 133×4, 219×6, 273×8, Note: S in the figure and table refers to the glass front wall sequence L. HG/T2131-91, PN-0.6MPa, PN-1.0MPa, 3.2 The cast iron glass 30° elbow (type B) connected by the slip-on flange shall comply with the provisions of Figure 2 and Table 2. Figure 2 Type B. t||PN/MPa
106×9
158×10
214×11
262×12
Note: S in China and the decline refers to the front wall of the pond glass, standard network
increase customer service standard free download
bar, kg
PN-0.6MPaPN-1.0MPa
reference egg hydrogen, kg
HG/T2131-91
3.3 Flange-connected cast iron pond glass 30° elbow (C type) shall be in accordance with Figure 3 and Table 3.
Figure 3C type
PN/MPa
158×10
214×11
262×12
Note: S in the figure and table refers to the thickness of the front wall of the sugar glass. 3.4 Marking example
A type pond glass 30° elbow PN is 0.6MPaDN is 50mmDt
Mark: 30° elbow PN0.6DN50-AHG/T2131-914 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 pipe in the A type elbow shall be manufactured and accepted in accordance with the requirements of YB231. 4.3 Manufacturing tolerance and allowable deviation
4.3.1 For B type and C type elbows, the materials shall comply with the relevant provisions of GB9439. D2
Reference weight, kg
4.3.2 The allowable deviation of the center circle diameter of the bolt hole on the C-type elbow flange 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 un-toleranced dimensions of the machined surface shall be IT14 as specified in GB1804, and the tolerance grade of the un-toleranced dimensions of the non-machined surface shall be IT16.
HG/T2131—91
4.3.4 The allowable deviation of elbow length L shall be in accordance with Table 4. Table 4
Allowable deviation of elbow length
65~100
4.4The slip-on flanges for type A and type B elbows shall be selected in accordance with HG/T2105.125~200
4.5 Bolts for flange connection: PN greater than 0.6MPa and less than or equal to 1.0MPa shall be selected in accordance with GB5782 regulations: PN less than or equal to 0.6MPa shall be in accordance with GB5780 regulations, the screwdriver shall be in accordance with GB6170 regulations, and the gasket shall be selected according to relevant standards. 4.6 Water pressure test pressure and maximum working pressure at different temperatures shall be selected according to Table 5 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 Magnetism is prohibited during movement and transportation.
5.3 The glass surface of the outer mushroom candy shall be sealed with a soft gasket and a blind plate 5.4 The product shall be stored indoors, and outdoor storage or stacking is not allowed. Additional instructions:
This standard is proposed by China Chemical Equipment Corporation and is under the jurisdiction of the National Glass Equipment Standardization Technical Committee. 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. MPa
Maximum working pressure P at the following temperatures
120℃
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