HG 20631-1997 Spiral Wound Gasket for Steel Pipe Flange (American System) HG20631-1997 Standard download decompression password: www.bzxz.net

Spiral wound gaskets for steel pipe flanges
(American system)
HG 2063197
Subject content and applicable scope
This standard specifies the type, size and technical requirements of spiral wound gaskets for steel pipe flanges (American system). This standard applies to spiral wound gaskets for steel pipe flanges with a nominal pressure PN of 2.0MPa (Class 150) to 26.0MPa (αlass 1500) as specified in HG20615. 453
GB4239
SH 3407
HG20615
ZBJ22019
ZBG33005
Cited standards
"Cold-rolled stainless steel and heat-resistant steel strips"
"Spiral wound gaskets for pipe flanges"
"Types and parameters of steel pipe flanges (American system)""Technical conditions for metal-wound flexible graphite tapes""Polytetrafluoroethylene raw tape for thread sealing" 3 Conditions for use of gaskets
The maximum working temperature of the gasket shall be in accordance with the provisions of Table 3-1. Maximum working temperature of gasket
Table 3-1
Metal strip material
oCr18Ni9
DCr17Ni12Mo2
D0Cr17Nil4Mo2
GB4239
Philippines Metal strip material
Special stone paper
Or non-asbestos paper
Flexible graphite tape
Sangtetrafluoroethylene
Note: i) Other metal strip materials can also be used, but they should be omitted when ordering. ② When used in oxidizing media ≤4,
ZBJ22019
ZBG33005
Maximum working temperature
4 Gasket type and size
Gasket type shall be in accordance with the provisions of Figure 4.0.1 and Table 4.0.1. 4. . 1
H40.1 Gasket type
Basic type
With inner ring
With outer ring
With inner and outer rings
Applicable sealing surface typebZxz.net
Groove surface
Raised surface (let)
Note: It is recommended to use the inner and outer ring type. When used for flanges with PN ≥ 11.0MPa, the inner and outer ring type must be used. The PTFE winding seal should adopt the state type. 4.0.2 Gasket size
The size of type A and type B gaskets shall be in accordance with the provisions of Table 1.0.21, and the size of type C and type D gaskets shall be in accordance with the provisions of Table 4.0.2-2~3. 456
Type A (basic type)
Type B (with inner ring)
Type C (with outer ring)
Type D (with inner and outer rings)
Figure 4.0.1
Type of gasket
Nominal diameter
Table 4.0.2-1
Dimensions of type A and type B gaskets
(00g ss)eAo-In
287909
27211857
OOEEEN
1-879 8*809
Nominal diameter
24 600
PN15. 0MPa(Clas5 SC0)
Wrapped stool mat
Braided
Continued table 4. 0. 2 — 2
PN26- 0MPa(Class 1500)
Wound pad
Wound pad
Wound pad inner and outer ring
Thickness:
Nominal diameter
4.2--3
DN>600mm large diameter French lamb C type and D type winding pad size table PN2.0MPa(Claas 15b)
1111-3
Wound pad
Building winding pad
PN5.0MPatClaas 300)
Winding pad!
1263.71311.4
Inner and outer rings
Nominal size
PN11.0MPa(Class 600)
Spiral wound pad
Spiral wound pad
Continued Table 4.0.2—3
PN15.0MPa(Class 900)
Spiral wound pad
Spiral wound pad
Spiral wound pad
Outer ring
Technical requirements
Gasket size difference Table 5.0.15..0.1
Table 5.0.1
Inner ring inner diameter D
Outer ring outer diameter
Inner and outer ring thickness T:
DN100--600
Gasket size limit deviation
Gasket thickness (excluding non-metallic Hao
Gasket inner diameter D
Gasket outer diameter D.
Other technical requirements of gaskets shall comply with the provisions of SH3407DN10.-200
DN250~900
DN10--200
DN250--600| |tt||DN>G00
6 Marking and packaging
6.0.1 Gaskets should be packaged according to type, specification and material. A product quality inspection certificate must be attached upon delivery. In addition to the basic gaskets, which should be marked with labels, other types of gaskets should be marked with the contents specified in 6.0.2 on the outer ring (or inner ring) with a steel stamp. 6.0.2 Marking contents
(1) Standard number (HG20631)
(2) Type code (see Table 4.0.1)
(3) Nominal diameter (mm);||t t||(4) Nominal pressure (MPa);
(5) Material code (see Table 6.0.2)
Gasket type and material code
Outer ring material
Name
oCr18Ni9
6.0.3 Marking example
Metal core material
OC1Ni9
Cr17Ni12Me2
00C-17Ni1Ma2
Non-metal strip material
Special asbestos paper||tt ||Buy graphite tape
PTFE
Special non-asbestos paper
Inner ring material
Low carbon steel
OCr18Nig
OCr17Ni12Mo2
00Cr17Ni14M02
C-type spiral wound gasket with nominal diameter 100mm and nominal pressure 2.0MPa (Class150), outer ring material is low carbon steel, metal belt material is 0Cr18Ni9, non-metal belt material is flexible graphite, and its mark is: HG 20531
Wound gasket
C 100-2. 0
Nominal diameter 700mi1 Nominal pressure 5.0MPa (Class300) D-type wound gasket for large diameter flange, inner and outer ring materials are 0Cr18Ni9, metal strip material is 0Cr18Ni9, non-metallic strip material is special asbestos paper, and its mark is: IG 20531
Wound gasket
D 700-5. 0
Nominal diameter 300mm. Nominal pressure 11.0MPa (Class 600) A-type wound gasket for flange, metal strip material is oCr17Nil2Ma2. Non-metallic strip material is polytetrafluoroethylene, and its mark is: HG 20631
Wound gasket
A 300—11.0
Additional Notes: This standard proposes the unit, editor and main drafter Proposing unit: Chemical Process Piping Design Technology Center Station of the Ministry of Chemical Industry Equipment Design Technology Center Station of the Ministry of Chemical Industry
Editor: Equipment Design Technology Center Station of the Ministry of Chemical Industry Main drafters: Ying Daoyan Yu Jun
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