HG 21526-1995 Oval rotary cover quick opening manhole. Attached pictures HG21526-1995 standard download decompression password: www.bzxz.net

Elliptical rotary cover quick opening manhole
HG21526-95
Subject content and scope of application
This standard specifies the type, basic parameters, dimensions, technical requirements and relevant use regulations of carbon steel elliptical rotary cover quick opening manhole.
This standard is applicable to elliptical rotary cover quick opening manhole with nominal pressure PN less than or equal to 0.6MPa and working temperature limited to the range specified in Mai 3-2.
Note: When using oil asbestos rubber sheet gasket, the upper limit of working temperature is 150℃. 113
GB97.1-85
GB 91-86
GB880-86
HG2151495
Cited standards
"Flat washers - Grade A"
"Parallel pins"
"Pin with holes"
"Types and technical conditions for manholes and handholes made of carbon steel and low alloy steel" 3 Types, basic parameters and dimensions
The types, basic parameters and dimensions of manholes are shown in the figure below and the provisions of Table 3-1 to Table 3-2
350×450
Note: ① The height of the manhole is 200. If there are special requirements, it is allowed to change, but the height dimension after the change must be indicated and the total mass of the manhole must be corrected. ② The total mass of the manhole is 100kg.
GB 880-86
GB 91-86bzxZ.net
Nominal pressure PN
Hexagon nut M24
Swivel bolt M24X120
Upper ear plate
Pin 20×85
Lower ear plate
Pin 5×30
Maximum non-shock working pressure at working temperature Table working
Maximum non-shock working pressure
Note: The maximum non-shock working pressure at intermediate temperatures can be determined by interpolation according to the pressure values ​​in this table. 116
Qiu 3-1
Q235-A
Asbestos rubber sheet
Oil-resistant asbestos rubber sheet
Q235-A
Q235-A
Q235-A
Low carbon steel
Q235-A
Q235-A·F
Table 3-2
Technical requirements
The technical requirements for manholes shall comply with the provisions of Chapter 4 "Technical Conditions" in HG21514. 117
Marking example
The elliptical rotary cover manhole with nominal pressure PNO.6, nominal size 450×350, cylinder section height 200 and asbestos rubber sheet gasket has the specified marking symbol:
Manhole (A·G) 450×350-0.6
HG 21526-95
For the above manhole with a simple section height of 240 (non-standard size), the specified marking symbol is: Manhole (AG) 450×350—0.6
HG21526-95
Month Proposer, Editor-in-Chief
Additional Notes
And Main Drafters
Proposer: Equipment Design Technology Center Station, Ministry of Chemical Industry Editor-in-Chief: China Tianchen Chemical Engineering Company Main Drafters: Li Wenren
Zhao Chenghe
Shen Pengfei
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