This standard specifies the type, basic parameters, dimensions, technical requirements and relevant use regulations of elliptical quick-opening stainless steel manholes. This standard is applicable to elliptical quick-opening stainless steel manholes with a nominal pressure of PN0.6MPa and a working temperature of greater than -20 to 200°C. The temperature rise and pressure drop can be applied to elliptical quick-opening stainless steel manholes with a working temperature of 300°C. HG 21600-1999 Elliptical quick-opening stainless steel manhole HG21600-1999 Standard download decompression password: www.bzxz.net

Elliptical quick-opening stainless steel manhole
HG 21600--1999
1 Subject content and scope of application
This standard specifies the type, basic parameter size, technical requirements and relevant use regulations of elliptical quick-opening stainless steel manhole.
This standard is applicable to the nominal pressure PN0.6MPa, the working temperature is>-20~200C, and the temperature rise and pressure drop can be applied to the circular quick-opening stainless steel manhole with a working temperature of 300℃.
GB 880
HG21594
Reference standards
《Split pin》
《Pin with hole》
《Classification and technical conditions of stainless steel manhole and hand hole》4
Type, basic parameters and dimensions
450X350
Note: ① The height of the manhole is 200. If there are special requirements, it can be changed, but the height dimension after the change must be noted and the wall thickness of the cylinder section must be rechecked. If it cannot meet the requirements, the wall thickness should be increased, and the stainless steel mass and total mass of the manhole should be modified.
② The mass of the manhole is 69kg for carbon steel and 22.66kg for stainless steel; the total mass is 92kg. ③ The type of the sealing surface is a raised surface. bzxz.net
Mark
Flange cover
Nut M24
Swivel bolt
Upper ear plate
Pin 20×85
Lower ear plate
Pin 5×30
Note: The material of D gasket is allowed to change, but it should be indicated in the container assembly drawing. The maximum impact working pressure bag nominal pressure at working temperature
-20~100
Stainless steel
Asbestos rubber sheet
20R lined stainless steel
Q235-A
Q235-A·F
Low carbon steel
Q235-A
Q235—A·F
Maximum non-impact working pressure (MPa)
Technical requirements
Technical requirements shall be in accordance with the provisions of HG21594-1999 "Classification and Technical Conditions of Stainless Steel Manholes and Handholes".
5 Monthly record of drawings of elliptical quick-opening stainless steel manhole
Elliptical quick-opening stainless steel manhole 450×350
Construction drawing number
HG21600-1999
Number of drawing sheets
Number of sheets1 Drawing
Nominal size
Specified marking symbol is:
Marking example
450×350, H-200 round quick-opening stainless steel manhole, its specification is 450×350
HG21600
H, 220 (non-standard size) The above example manhole, its specified marking symbol is: Manhole
450X350
H=220HG21600
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