This standard specifies the type, basic parameters, dimensions, technical requirements and relevant use regulations of the rotary handle quick-open stainless steel hand hole. This standard is applicable to working pressure PN0.25MPa, working temperature greater than -20 ~ 200 ℃, temperature rise and pressure reduction can be applied to the rotary handle quick-open stainless steel hand hole with working temperature of 300 ℃. HG 21604-1999 Rotary handle quick-open stainless steel hand hole HG21604-1999 standard download decompression password: www.bzxz.net

Stainless steel hand hole with quick opening of rotary handle
HG 21604--1999
1 Subject content and scope of application
This standard specifies the type, basic parameters, dimensions, technical requirements and relevant use regulations of stainless steel hand hole with quick opening of rotary handle.
This standard is applicable to the working pressure PN0.25MPa, the working temperature is -20~200℃, and the temperature rise and pressure drop can be applied to the stainless steel hand hole with quick opening of rotary handle at the working temperature of 300℃
GB 5781
GB6179
GB 882
HG21594
Referenced standards
《Type I hexagonal head bolts - full thread grade C》
《Type I hexagonal nuts - grade C》
《Type I hexagonal slotted nuts - grades A and B》
《Large washers grade A and C》
《Flat washers grade》
《Split pins》
《Pin shafts》
《Classification and technical conditions for stainless steel hand holes》11
Types, basic parameters and dimensions
Standard number
GB 6179Www.bzxZ.net
GB5781
Gasket=3
Cover baffle
Stainless steel
Low carbon steel
Asbestos rubber sheet
Q235-A·F
Maintenance
Q235-A
Q235--A
Low carbon steel
Note: ①The material of the gasket is allowed to change, but it should be indicated in the container assembly drawing. Maximum non-impact working pressure gauge nominal pressure at working temperature
20-100
(C):
Maximum non-impact working pressure (MPa)
(mm）
-Hh d,
Mass (kg)
619522027723513029712141r24×51515.66171813003504153601503721816Tr32x611118
Note: The height H and size of the hand hole can be changed if there are special requirements, but the changed H and size should be indicated and the stainless steel mass and total mass of the hand hole should be modified. 123
4 Technical requirements
Technical requirements shall be in accordance with the provisions of HG21594-1999 "Classification and Technical Conditions of Stainless Steel Manholes and Hand Holes".
Stainless steel hand hole with quick opening by rotary handle drawing diary
Stainless steel hand hole with quick opening by rotary handle
2Stainless steel hand hole with quick opening by rotary handle
Construction drawing number
Number of drawings
Number of sheets 1# drawing
TC150--0.25HG21604-1999-1
TC250--0.25IHG21604-1999--213
6Marking example
Stainless steel hand hole with quick opening by rotary handle with nominal diameter DN250 and H1=150: the specified marking symbol is:
HG 21604
H. The above example of a hand hole with a size of 160 (non-standard size) has the following marking symbols: hand hole
250---0.25H,-160
HG21604
Instructions for selecting stainless steel manholes and hand holes
1 This standard only applies to austenitic stainless steel normal pressure manholes and hand holes, and also applies to ferritic stainless steel (0Cr13A1, 0Cr13). Where "stainless steel" is indicated in the standard construction drawings, the specific materials and welding materials are the same as the main materials of the container. 2 The density of stainless steel in the standard is calculated as 7930kg/m3. If stainless steel of other specific gravity is used, the total mass of the manhole and hand hole may not be modified. 3 The section is considered to be non-corrosive. If the medium used is corrosive, the thickness S of the section is allowed to increase. The increased S should be indicated and the stainless steel mass and total mass of the manhole and hand hole should be modified at the same time.
4 The hand hole is designed according to four types of sealing surfaces, namely FF (full plane), RF (raised surface), MFM (concave and convex surface) and TG (grooved surface). 5 Gasket
Asbestos rubber sheet is used for nominal pressure PN1.6MPa and below, which can be changed according to the medium conditions, but it should be noted in the assembly drawing (the changed gasket can only use non-metallic soft gaskets).
Metal spiral wound gaskets are used for nominal pressure PN2.5MPa and PN4.0MPa. Asbestos rubber sheet gasket (GB3985XB350) with HG20606 standard is used for non-metallic soft gaskets. Metal spiral wound gaskets (code-named D type) with inner and outer rings are used for protruding surfaces. Metal spiral wound gaskets (code-named B type) with inner rings are used for concave and convex surfaces. The materials of inner and outer rings are OCr18Ni9 (code-named 2), the material of metal belt is 0Cr18Ni9 (code-named 2), and the non-metallic material is flexible graphite (code-named 2). The material of the gasket is allowed to change, but it should be indicated in the assembly drawing. Normal pressure quick opening handhole and normal pressure manhole adopt rubber sheet, the material standard is GB5574, code-named 4710.
6 people, the nominal head diameter of the handhole
normal pressure manhole is divided into DN450, DN500 and DN600. Quick opening manhole is divided into DN450 and DN500. Normal manholes for non-normal pressure are DN450, DN500 and DN600. Manholes with raised or concave-convex sealing surfaces are DN450, DN500 and DN600. Elliptical manholes are 450×350, and handholes are DN150 and DN250 (the handhole with nominal pressure DN4.0MPa has only one nominal diameter of DN150). 7 Nominal pressure AFL is divided into PN 0.6MPa, PN1.0OMPa, PN1.6MPa, PN2.5MPa, PN4.0MPa and normal pressure, a total of six types. The maximum operating pressure is PN4.0MPa. The handhole is divided into PN 0.25MPa, PN 0.6MPa, PN 1.6MPa, PN2.5MPa, PN4.0MPa and normal pressure, a total of six types. 8 Use temperature
Nominal force PN 0.25MPa.PN O.6MPa.PN 1.0MPa.PN1.6MPaPN2.5MPa.PN4.0MPa The use temperature of the manhole is ≥-20~200℃, and the temperature can be increased to 300℃. The gasket of the normal pressure quick opening handhole and normal pressure manhole is made of rubber sheet, and the use temperature is 0100℃.
Stainless steel manhole
HG 21594--21604---1999
Preparation Instructions
1 Overview
The original Ministry of Chemical Industry standard "Stainless steel manhole" (HGJ503~513--86) has been used for more than ten years since 1986. Since the adopted standard is constantly updated, it can no longer meet the design needs. According to the requirements of the China Chemical Engineering Survey and Design Association, the National Chemical Equipment Design Technology Center Station organized Jilin Chemical Engineering Company to revise and compile the "Stainless Steel Manhole" (HG21594-21604-1999) standard. 2 Nominal pressure
1. Manholes are divided into six types: PN0.6MPa, PN1.0MPa, PN1.6MPa, PN2.5MPa, PN4.0MPa and normal pressure. 2. The hand holes are prepared with nominal pressures of PNO.25MPa, PNO.6MPa-PN1.6MPa, PN2.5MPa and PN4-OMPa, and normal pressure hand holes are also prepared. 129
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