HG 21534-1995 Quick-opening hand hole with rotary handle.

HG 21534-1995 Rotary handle quick opening hand hole. Attached picture HG21534-1995 standard download decompression password: www.bzxz.net

Quick-opening handhole with rotary handle
HG 21534—95
Subject content and scope of application
This standard specifies the type, basic parameters, dimensions, technical requirements and relevant use regulations of quick-opening handhole with rotary handle made of carbon steel. This standard is applicable to quick-opening handhole with rotary handle whose nominal pressure PN is less than or equal to 0.25MPa and whose working temperature is limited to the range specified in Table 3-2.
Note: When oil-resistant asbestos rubber sheet gasket is used, the upper limit of working temperature is 150℃. 179
GB 91--86
GB6178-86
GB 97.1-85
GB5781-86
GB 96—85
GB 41-86
GB 882-86
HG 21514--95
"Flat pin"
Referenced standards
"Type I hexagon slotted nut - Grade A and B"
"Flat washer - Grade A"
"Hexagon head bolt with full thread - Grade C"
"Large washer - Grade A and C"
"Type I hexagon nut - Grade C"
"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 hand holes are shown in the figure below and the provisions of Tables 3-1 to 3-3. 11
(beam length)
Standard number
GB 91--86
GB 6178-86
GB 97.1-85
GB5781-86
GB 96-85
GB41-86
GB 882-86
GB 91-86
GB 97.1-85
Gasket 8=3
Cover baffle
Table 3-1
20 (forgings)
Low carbon steel
Q235--A
Asbestos rubber sheet
Oil-resistant asbestos rubber sheet
Q235—AF
Q235-A
25 (forgings)
Q235-A·F
25 (forgings)
Q235-A
Low carbon steel
Note: Part number 1 in the table only represents the materials of the simple section and the lug in the simplified components, and the material of the welding ring is Q235-A. Maximum non-impact working pressure at working temperature Table nominal pressure
Maximum non-impact working pressure MPa
Note: The maximum non-impact working pressure at intermediate temperature can be determined by interpolation according to the pressure value in this table. Table
Nominal pressure
Table 3-3
Total mass
Note: The height H of the hand hole is determined based on the diameter of the container not less than twice the nominal diameter of the hand hole. If there are special requirements, changes are allowed, but the changed H size must be indicated and the total mass of the hand hole must be corrected. 182bZxz.net
Technical requirements
The technical requirements for the hand hole shall be in accordance with the provisions of Chapter 4 "Technical Conditions" in HG21514. 183
Marking example
Nominal pressure PNO.25, nominal diameter DN150.H=110, the rotary handle quick-opening hand hole with asbestos rubber sheet gasket, the specified marking symbol is:
Hand hole (A·G) 150—0.25HG21534-95H, the above hand hole of 120 (non-standard size), the specified marking symbol is: Hand hole (A·G) 150--0.25 H-120 HG21534-95184
Additional instructions
The proposed unit, the main editing unit
and the main drafters
Proposed unit: Equipment Design Technology Center Station of Ministry of Chemical Industry Main editing unit: China Tianchen Chemical Engineering Company Main drafters: Li Wenren, Zhao Cheng and Shen Pengfei185
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