This standard specifies the type, basic parameters, dimensions, technical requirements and relevant use regulations of flat cover stainless steel hand holes. This standard is applicable to nominal pressure PN0.6MPa, PN1.0MPa, PN1.6MPa, PN2.5MPa and PN4.0MPa, and the working temperature is greater than 20-100℃. The temperature rise and pressure drop can be applied to the flat cover stainless steel hand holes with a working temperature of 300℃. HG 21602-1999 Flat cover stainless steel hand holes HG21602-1999 standard download decompression password: www.bzxz.net

Flat cover stainless steel hand hole
HG 21602-1999
Subject content and scope of application
This standard specifies the type, basic parameters, dimensions, technical requirements and relevant use regulations of flat cover stainless steel hand holes.
This standard is applicable to the nominal pressure of PN0.6MPa, PN1.0MPa, PN1.6MPa.FN 2.5MPa and PN 4.0MPa, the working temperature is--20-100℃, and the temperature rise and pressure drop can be applied to the flat cover stainless steel hand hole with a working temperature of 300C. 97
HG20602
HG20606
HG 20608
GB5780
GB6170
G3 901
HG20613
HG21594
Referenced standards
《Stainless steel lined flange cover》
《Non-metallic flat gaskets for steel pipe flanges》《Flexible graphite composite gaskets for steel pipe flanges》《Type I hexagonal nuts - Grade C》
《Hexagonal bolts - Grade C》
《Type I hexagonal nuts - Grade A and B》
《Equal length studs》
《Fasteners for steel pipe flanges》
《Classification and technical conditions for stainless steel manholes and hand holes》Type, basic parameters and dimensions
Standard number
GB5780
HG20613
GB6170
HG2061 3
HG20606
（HG20608)
HG20602
Bolts, studs
Flange cover
See data sheet
See data sheet
Stainless steel
Grade 4.8, Grade 8.8wwW.bzxz.Net
35CrMoA
Grade 5.8
30CrMo
20R, 20 forging (16Mn forging)
Lined with stainless steel
Asbestos rubber sheet
(Flexible graphite composite pad)
20R(16MnR)/stainless steel
Q235-A·F
Note: ①The material of the gasket is allowed to change, but it should be indicated in the container assembly drawing. ②The materials and standards in brackets are used for nominal pressure PN2.5MPa.PN4.OMPa. The most isolated non-impact working pressure gauge nominal pressure at working temperature
220-100
The highest non-impact working pressure (MPa)
(1XOzW)
(otXozW)
Sfx651
4: Technical requirements
Technical requirements are in accordance with the provisions of HG215941999 "Classification and Technical Conditions of Stainless Steel Manholes and Handholes"
5 Flat cover stainless steel hand hole drawings self-recording
Flat cover stainless steel hand felt
Flat cover stainless steel hand hole||tt| |Flat cover stainless steel hand hole
Flat cover stainless steel hand hole
Flat cover stainless steel hand hole
Flat cover stainless steel hand hole
Flat cover stainless steel hand hole
Flat cover stainless steel hand hole
Flat cover stainless steel hand hole
Flat cover stainless steel hand hole
Flat cover stainless steel hand hole
Flat cover stainless steel hand hole
Flat cover stainless steel hand hole
Flat cover stainless steel hand hole
Flat cover stainless steel hand hole
Flat cover stainless steel hand hole
Construction drawing number
RF 150--0. 611
HG21602-1999---1
RF250-0.6|HG21602-19992
RF 150--1.01HG21602—1999-3
RF250--1.0 HG21602-1999-4||tt ||RF150-1.6HG21602--1999-5
RF250-1.6HG21602-1999—6
MFM 150--1.0 HG 21602---1999-7MFM250-1.011
HG21602—1999—8
MFM 150--1.6HG 21602--1999--9MFM250--1.6HG21602-1999--10
RF150--2.5HG21602--1999-11
RF250--2.5HG21602--1999-12
RF150--4.0HG21602-1 999-13
MFM150--2.5|HG21602--1999-
MFM250-2.5HG21602-1999--15
MFM150-4.0JHG21602--1999-16
Number of sheets
Number of sheets folded 1# sheet
6 Marking example
Nominal pressure PN1.6MPa, nominal diameter DN250.H=200, flat cover stainless steel hand hole with concave and convex sealing surface, the specified marking symbol is: hand hole MFM250-1.6HG21602
H-160 (the non-standard size of the above example hand hole, the specified marking symbol is: hand support MFM250--1.6H,-160HG 21602105
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