This standard specifies the main technical parameters, structural dimensions and technical conditions of quick special pipe joints. HG/T 21577-1994 Quick special pipe joints HG/T21577-1994 Standard download decompression password: www.bzxz.net

Industry Standard of the People's Republic of China
HGT'21577
Quick Special Pipe Connectors
1994-12-09, Released
1995-01-01
Ministry of Chemical Industry of the People's Republic of China
"Released
Industry Standard of the People's Republic of China
Quick Special Pipe Connectors
HG/T 21577-94
Editor: General Research Institute of Science and Technology, Ministry of Chemical Industry Approved by: Ministry of Chemical Industry Date of implementation: January 1995
Engineering Design Standards Editing Center, Ministry of Chemical Industry
Document of Ministry of Chemical Industry
Huajianfa (1994) No. 842
Notice on the issuance of two chemical industry standards including "Double Switch Plug Valve"
Chemical Industry Departments (bureaus, companies) of provinces, autonomous regions, municipalities directly under the Central Government and independently planned cities, and all relevant design units:
By the Chemical Process Piping Design Technology Center of the Ministry of Chemical Industry The two standards "Double Switch Plug Valve" and "Quick Special Pipe Joint" formulated by the General Research Institute of Science and Technology have been reviewed and approved as chemical industry standards, with numbers HG/T21576-94 and HG/T21577-94 respectively. They will be implemented on January 1, 1995. The two standards are managed by the Chemical Process Piping Design Technology Center of the Ministry of Chemical Industry and published and distributed by the Engineering Construction Standard Editing Center of the Ministry of Chemical Industry. Ministry of Chemical Industry
December 9, 1994
Subject content and scope of application
Cited standards
Code and symbol
Main technical parameters
Structural type and size
Technical conditions
Appendix A
Appendix B
Installation and use instructions for quick special pipe joints (ring type inner hoop)#++
Installation and use instructions for quick special pipe joints (semi-ring type inner hoop) Preparation instructions
1 Subject content and scope of application
This standard specifies the main technical parameters, structural dimensions and technical conditions of quick special pipe joints.
The characteristics of quick special pipe joints are easy connection and no welding is required In flammable and explosive chemical enterprises, in the case of partial water and steam outages, the above-ground pipes and buried pipes can be replaced, which is fast and convenient. The use of this joint has great advantages. 1.0.3
This standard is applicable to pipes with a nominal pressure of PN1.0 and PN1.6MPa, a working temperature of ≤250℃ and a nominal diameter of DN15~400mm. 1.0.4This standard is applicable to connectors for pipelines conveying water, steam, air, gas, acid, alkali, etc.
JB/T·5100
GB2100Www.bzxZ.net
ZJB 16.006
GB 3098.1
GB 3098.2
GB 3098.3
GB6414
GB5782
HG20553
GB4879
GB6388
GB11352
Referenced standards
《Classification and technical conditions of carbon steel castings》《Technical conditions for investment casting carbon steel parts》
《Technical conditions for stainless acid-resistant steel castings》 Parts》
Testing and Inspection of Valves
Mechanical Properties of Fasteners
Mechanical Properties of Fasteners
Mechanical Properties of Fasteners
Dimensional Tolerances of Castings
Bolts, Screws and Studs
Nuts》
Set Screws
Hexagon Head Bolts Grade A and B
Hexagon Nuts|| tt||《Hexagon socket head screws》
《Seamless and welded steel pipe size selection series for chemical piping》《Rust-proof packaging》
《Transport packaging delivery and receipt marks》
《Casting carbon steel parts for general engineering》
3 Codes and marks
Nominal pressure
Sealing material
Nominal diameter
Pipe series
Product code
Example. FSC1100A-1.6
Code A: Natural rubber
B: Butyl rubber
C: Fluororubber
D: Ethylene propylene rubber
【（HG20553 pipe size series）
Ⅱ (If the pipe is of old specifications, the code is Ⅱ)［Fast special pipe joints
(FastSpecial Coupling)
indicates the quick special pipe joint I series pipe, the nominal diameter is DN100 (the outer diameter of the pipe is 114.3mm), the sealing material is natural rubber, and the nominal pressure is 1.6MPa. For example: FSC 180C-1.0
indicates the quick special pipe joint II series pipe, the nominal diameter is DN80 (the outer diameter of the pipe is 89mm), the sealing material is fluororubber, and the nominal pressure is 1.0MPa. 3
4.0.1 Pressure range
4 Main technical parameters
The nominal diameter is DN15~150mm, and the pressure level is PN1.0 and PN1.6MPa;
The nominal diameter is DN200~400mm, and the pressure level is PN1.0MPa. 4.0.2 Working temperature
When the sealing material is natural rubber or nitrile rubber, the working temperature is ≤80℃. When the sealing material is EPDM or FKM, the working temperature is 250℃. See Table 4.0.3 for the main materials.
Seal
RZG200400
or ZGOCr18Ni9
Cast steel RZG 200~400
Cast stainless steel
ZG0Cr18Ni9
Natural rubber
Nitrile rubber
FKM
EPDM
35*steel or
OCr18Ni9Stainless steel
35*steel or 0Cr18Ni9
Medium
Water, steam, oil,
acid, alkali
Water, steam, oil
Acids, alkalis
Water, air
Steam, chemicals
Acids, alkalis
Standard No.
JB/T5100
GB2100
JB/T5100
GB2100
GB5782
4.0.4 Specification series see Table 4.0.4.
Nominal diameter
Semi-ring type
1,oMPa
Structural type and size
Structural type
5.1.1 Quick special pipe joint (ring with inner ferrule) see Figure 5.1.1. Quick special pipe joint (half cup inner hoop) see Figure 5.1.2. 5.1.2
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