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HG/T 20632-2009

Chinese Standard: 'HG/T 20632-2009'
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HG/T 20632-2009English95 Add to Cart 0--15 minutes. Auto immediate delivery. Covered serrated metal gaskets for use with steel pipe flanges (Class designated) Valid HG/T 20632-2009
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Detail Information of HG/T 20632-2009; HG/T20632-2009
Description (Translated English): Covered serrated metal gaskets for use with steel pipe flanges (Class designated)
Sector / Industry: Chemical Industry Industry Standard (Recommended)
Classification of Chinese Standard: J15
Classification of International Standard: 23.040.60
Word Count Estimation: 14,181
Date of Issue: 2009-02-05
Date of Implementation: 2009-07-01
Older Standard (superseded by this standard): HG 20632-1997
Quoted Standard: GB/T 912; GB/T 4237; GB/T 3280; HG/T 20615; HG/T 20623; HG/T 20635; JB/T 7758.2; QB/T 3625
Administrative Organization: ?PRC MIIT
Regulation (derived from): Engineering [ 2009 ] No. 27
Summary: This standard specifies the steel pipe flanges (Class Series) with a covering layer of the tooth with a combination of pad type, size, technical requirements, marking and signs. This standard applies to HG/T 20615, HG/T 20623 specified nominal pressure Class150 (PN20) ~ Class2500 (PN420) steel pipe flanges with a covering layer of the tooth combination pad.

HG/T 20632-2009
Chemical Industry Standard
of the People's Republic of China
HG
Replacing HG 20632-1997
Covered Serrated Metal Gaskets for Use with Steel Pipe
Flanges
(Class Designated)
钢制管法兰用具有覆盖层的齿形组合垫
(Class系列)
ISSUED ON. FEBRUARY 5, 2009
IMPLEMENTED ON. JULY 1, 2009
Issued by. Ministry of Industry and Information Technology of the People's
Republic of China
Contents
1. Scope ... 3 
2. Normative references ... 3 
3. General provisions ... 3 
3.1 Type and code ... 3 
3.2 Nominal pressure and nominal dimension ... 4 
3.3 Gasket use ... 4 
3.4 Material ... 5 
4. Dimension ... 5 
5. Technical requirements ... 12 
6. Inspection ... 12 
7. Marking and labeling ... 13 
7.1 Marking and illustration ... 13 
7.2 Labeling ... 14 
1. Scope
This standard specifies the type, dimension, technical requirements, marking and sign of
combined covered serrated gasket for use with steel pipe flanges (Class designated).
This standard is applicable to the covered serrated metal gaskets for use with steel pipe
flanges whose nominal pressures are from C1assl50 (PN20)-C1ass2500 (PN420) which are
specified in HG/T 20615 and HG/T 20623.
2. Normative references
The following provisions contained in the following standards are turned into the
provisions of this national standard by being referred in this national standard. For date
reference, the subsequent amendments to (excluding amending error in the text) or revisions
of, any of these publications do not apply. And parties to agreements based on this standard
are encouraged to investigate the possibility of applying the most recent editions of the
standards indicated below. For undated references, its latest edition referred to applies.
GB/T 912 "Hot-rolled Sheets and Strips of Carbon Structural Steels and High Strength
Low Alloy Structural Steels"
GB/T 4237 "Hot Rolled Stainless Steel Plate Sheet and Strip"
GB/T 3280 "Cold Rolled Stainless Steel Plate Sheet and Strip"
HG/T 20615 "Steel Pipe Flange (Class Designated)"
HG/T 20623 "Major Diameter Steel Pipe Flange (Class Designated)"
HG/T 20635 "Specification for Selection of Steel Pipe Flange, Gaskets and Bolting
(Class designated)"
JB/T 7758.2 "Specifications of Flexible Graphite Sheets"
QB/T 3625 "PTFE Sheet"
3. General provisions
3.1 Type and code
The type, code name, sectional form and proper type of flange sealing surface of the
gasket shall meet the requirements of Table 3.1.
Table 4-1 Dimension of the Gasket with Centring Ring Type (B type and C type) for Use with Raised Face Flange (mm)
Nominal dimension
Serrated metal ring Centring ring D1
Thickness of
serrated
metal ring T
Thickness of
integral
centering
ring t
Thickness
of moveable
centering
ring t1
Thickness
of the cover
layer S
Inside diameter
D3
Outside diameter
D2
Nominal pressure class
DN NPS 150 300 600 900 1500 2500
15 21 23.0 33.3 46.5 52.5 52.5 62.5 62.5 69.0
4.0 2.0 1.5 0.5
43 28.6 39.7 56.0 66.5 66.5 69.0 69.0 75.0
25 1 36.5 47.6 65.5 73.0 73.0 77.5 77.5 84.0
411 44.4 60.3 75.0 82.5 82.5 87.0 87.0 103.0
211 52.4 69.8 84.5 94.5 94.5 97.0 97.0 116.0
50 2 69.8 88.9 104.5 111.0 111.0 141.0 141.0 144.5
212 82.5 101.6 123.5 129.0 129.0 163.5 163.5 167.0
80 3 98.4 123.8 136.5 148.5 148.5 166.5 173.0 195.5
100 4 123.8 154.0 174.5 180.0 192.0 205.0 208.5 234.0
125 5 150.8 182.6 196.0 215.0 239.5 246.5 253.0 279.0
150 6 177.8 212.7 221.5 250.0 265.0 287.5 281.5 316.5
200 8 228.6 266.7 278.5 306.0 319.0 357.5 351.5 386.0
(Continued) (mm)
Nominal dimension
Serrated metal ring Centring ring D1 Thickness
of serrated
metal ring T
Thickness
of integral
centering
Thickness
of moveable
centering
Thickness
of the cover
layer S
Inside diameter
D3
Outside diameter
D2
Nominal pressure Class
Table 4-2 Fundamental-form (A Type) Gasket Dimension for Use with Tongued and Grooved Surface Flange and Male-female Face Flanges (mm)
Nominal dimension
Serrated metal ring (Class300-Class1500)
Thickness of serrated metal ring
T Inside diameter D3 Outside diameter D2 DN NPS Male-female face Tongued and grooved surface
3.0
32 411 42 48 64
40 211 44 54 73
65 212 68 86 105
80 3 84 108 127
100 4 110 132 157
125 5 137 160 186
150 6 162 191 216
200 8 213 238 270
250 10 267 286 324
300 12 318 343 381
350 14 349 375 413
400 16 400 425 470
450 18 451 489 533
500 20 502 533 584
600 24 603 641 692
Table 4-4 The Dimension of the Covered Serrated Gasket with Integral Centring Ring (C type) for Use with
Flange (B Designated; DN>600) (mm)
Nominal
dimensio
Class150 Class300 Class600 Class900
The
thicknes
s of the
serrated
metal
ring T
The
thicknes
s of
moveabl
centerin
g ring t
Serrated metal
ring
Outside
diamete
r of the
centerin
g loop
D1
Serrated metal
ring
Outside
diamete
r of the
centerin
g loop
D1
Serrated metal
ring
Outside
diamete
r of the
centerin
g loop
D1
Serrated metal
ring
Outside
diamete
r of the
centerin
g ring
D1
DN NPS
Inside
diamete
D3
Outside
diamete
D2
Inside
diamete
D3
Outside
diamete
D2
Inside
diamete
r D3
Outside
diamete
r D2
Inside
diamete
r D3
Outside
diamete
r D2
650 26 673.1 698.5 725 673.1 711.2 770 663.6 714.4 765 692.2 749.3 838
4.0 2.0
700 28 723.9 749.3 775 723.9 762.0 824 704.9 755.7 819 743.0 800.1 902
750 30 774.7 800.1 826 774.7 812.8 885 777.9 828.7 879 806.5 857.3 959
800 32 825.5 850.9 880 825.5 863.6 939 831.9 882.7 932 863.6 914.4 1016
850 34 876.3 908.1 933 876.3 914.4 993 889.0 939.8 998 920.8 971.6 1074
900 36 927.1 958.9 986 927.1 965.2 1047 939.8 990.6 1049 946.2 997.0 1124
950 38 974.6 1009.7 1043 1009.7 1047.8 1098 — — — — — —
0 40 1022.4 1063.6 1094 1060.5 1098.6 1149 — — — — — —
0 42 1079.5 1114.4 1144 1111.3 1149.4 1200 — — — — — —
0 44 1124.0 1165.2 1195 1162.1 1200.2 1250 — — — — — —
0 46 1181.1 1224.0 1254 1216.0 1254.1 1317 — — — — — —
0 48 1231.9 1270.0 1305 1263.7 1311.3 1368 — — — — — —
0 50 1282.7 1325.6 1356 1317.6 1355.7 1419 — — — — — —
0 52 1333.5 1376.4 1407 1368.4 1406.5 1470 — — — — — —
0 54 1384.3 1422.4 1, 162 1403.4 1454.2 1530 — — — — — —
0 56 1444.6 1477.8 1513 1479.6 1524.0 1595 — — — — — —
0 58 1500.2 1528.8 1578 1535.1 1573.2 1657 — — — — — —
0 60 1557.3 1585.9 1629 1589.1 1630.4 1708 — — — — — —
5. Technical requirements
5.0.1 There shall not be such defects as bulge, crack, scratch and sticky dirt on the sealing
surface of the gasket.
5.0.2 Dimension tolerance of the gasket shall meet the requirements of Table 5.0.2.
Table 5.0.2 Gasket Dimension tolerance (mm)
Tooth socket Serrated metal ring Centring ring
Pitch
Tooth depth
Outside diameter D2 Inside diameter D3 Thickness
Outside
diameter
D1
Thickness
t1 ≤600 >600 ≤600 >600
±0.005 0 -0.05
-0.4 ±1.6
+0.4
0 ±0.8
-0.25
-0.75
-0.1
5.0.3 Manufacture
1 Serrated metal ring usually shall be overall structure. If weld structure is adopted, it
shall meet the following requirements.
1) User's permission shall be gotten;
2) Complete penetration type shall be adopted for the weld structure. The soldered
joint shall not exceed two. And stress-relief heat treatment shall be carried out after
welding.
3) Before the cover layer is covered, serrated form and dimension at the part of the
weld shall be uniform continuously with other parts.
2 The planeness of the serrated metal ring shall not be larger than 1/100 of the gasket
outside diameter. ......
Related standard:   HG/T 20623-2009  HG/T 20627-2009
   
 
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