HG 21527-1995 Swivel arch cover quick opening manhole. Attached picture

HG 21527-1995 Swivel Arch Quick Opening Manhole. Attached Figure HG21527-1995 Standard Download Decompression Password: www.bzxz.net

Swivel arch cover quick opening manhole
HG 21527—95
Subject content and scope of application
This standard specifies the type, basic parameters, dimensions, technical requirements and relevant use regulations of carbon steel swing arch cover quick opening manhole.
This standard is applicable to the swing arch cover quick opening manhole with nominal pressure PN less than or equal to 0.6MPa and working temperature limited to the range specified in Table 3-2.
Note: When using oil-resistant asbestos rubber sheet gasket, the upper limit of working temperature is 150℃. 121
GB 97.1-85
GB880--86
GB 91—86
HG21514-95
《Flat washers - Grade A》
《Pin with hole》
《Split pin》
Cited standard
《Types and technical conditions of 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 Table 31~Table 3-FS type
MFM type
Standard No.
GB 880---86
GB 91-86
Gasket 8=3
Hexagonal nut
Swivel bolt
Upper ear plate
Lower ear plate
Pin 25×95
Pin 6.3×36
See size table
See size table
7/9/11
14/18/22
12/16/20
14/18/22
Note: The quantity of items 9, 10, 11, and 12 is the quantity of manholes of DN400/DN450/DN500 respectively. Maximum shock-free working pressure at working temperature Table nominal pressure PN
Q235-A
Q235-A
Asbestos rubber sheet
Table 3-1
Oil-resistant asbestos rubber sheet
Q235-A
Q235--A
Q235—A
Q235-A
Q235-A
Low carbon steel
Q235-A·F
Table 3-2
Maximum shock-free working pressure
Note: The maximum shock-free working pressure at intermediate temperatures can be determined by interpolation according to the pressure values ​​in this table. ruler
580530495400300|24
630580545450
630595/500350
530495400300
580545450325
630/59 5/500 350
580530495
580545450
630595500350
Live Bolt
Diameter×Length
M27X140
M27X145
M27X150
M27X140
M27× 145
M27X150
M27X140
M27×145
M27X150
Total mass
Note: ① The height H of the manhole is determined based on the diameter of the container being not less than twice the nominal diameter of the manhole; if there are special requirements, changes are allowed, but the changed H size must be indicated and the total mass of the manhole must be corrected. ② The nominal diameters in brackets in the table should not be used as much as possible. 124
4·Technical requirements
The technical requirements for manholes shall comply with the provisions of Chapter 4 "Technical Conditions" in HG21514. 125
Marking example
The specified marking symbol for the swing arch quick-opening manhole with nominal pressure PNO.6, nominal diameter DN400.H.-210, FS type sealing surface, and asbestos rubber sheet gasket is: Manhole FS (A·G) 400-0.6wwW.bzxz.Net
HG21527-95
Hi-240 (non-standard size) in the above example is: Manhole Hole FS (A G) 400-0.6
Hi-240
HG21527-95
Additional Notes
Proposer, Editor-in-Chief
and Main Drafters of this Standard
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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