钢制管法兰连接用八角形金属环垫 (摘自GB/T9128.1—1988)
钢制管法兰连接用椭圆形金属环垫 (摘自GB/T9128.2—1988) (mm)
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标记示例:
材料为0Cr19Ni9，环号为R21的八角形金属环垫：
八角环垫 R21-0Cr19Ni9 GB／T 9128.1—1988
注：r＝1.6 mm(环宽≤22.2 mm)r＝2.4mm(环宽≥25.4mm)
材料为0Cr19Ni9,环号为R21的椭圆 形金属环垫：
椭圆环垫 R21-0Cr19Ni9 GBCT 9128.2—1988
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公称压力PN／MPa
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环号
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节径P
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环宽A
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八角形垫
(GB／T 9128.1—1988)
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椭圆形垫
(GB／T 9128.2—1988)
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2.0
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5.0，10.0
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15.0
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25.0
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42.0
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环高H
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环的平面宽度C
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理论质量／kg
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环高H
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理论质量／kg
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公称通径DN
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15
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R11
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34.14
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6.4
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9.5
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4.3
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0.05
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11.1
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0.05
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15
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15
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R12
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39.67
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7.9
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12.7
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5.2
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0.1
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14.3
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0.1
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20
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15
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R13
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42.88
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7.9
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12.7
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5.2
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0.1
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14.3
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0.11
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20
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20
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R14
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44.45
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7.9
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12.7
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5.2
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0.1
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14.3
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0.11
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25
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R15
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47.62
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7.9
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12.7
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5.2
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0.11
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14.3
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0.12
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25
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25
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25
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20
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R16
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50.80
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7.9
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12.7
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5.2
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0.11
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14.3
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0.12
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32
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R17
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57.15
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7.9
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12.7
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5.2
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0.13
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14.3
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0.14
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32
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32
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32
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25
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R18
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60.32
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7.9
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12.7
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5.2
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0.14
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14.3
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0.15
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40
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R19
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65.07
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7.9
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12.7
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5.2
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0.15
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14.3
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0.16
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40
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40
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40
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R20
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68.27
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7.9
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12.7
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5.2
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0.15
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14.3
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0.17
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32
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R21
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72.74
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11.1
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15.9
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7.7
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0.29
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17.5
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0.3
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50
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R22
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82.55
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7.9
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12.7
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5.2
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0.19
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14.3
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0.2
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50
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40
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R23
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82.55
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11.1
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15.9
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7.7
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0.33
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17.5
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0.34
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50
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50
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R24
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95.25
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11.1
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15.9
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7.7
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0.38
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17.5
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0.39
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65
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R25
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101.60
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7.9
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12.7
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5.2
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0.23
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14.3
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0.25
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65
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50
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R26
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101.60
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11.1
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15.9
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7.7
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0.41
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17.5
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0.42
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65
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65
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R27
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107.95
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11.1
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15.9
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7.7
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0.43
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17.5
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0.45
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65
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R28
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111.12
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12.7
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17.5
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8.7
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0.56
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19
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0.57
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80
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R29
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114.30
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7.9
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12.7
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5.2
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0.26
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14.3
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0.28
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80
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R30
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117.48
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11.1
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15.9
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7.7
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0.47
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17.5
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0.49
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80
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80
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R31
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123.82
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11.1
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15.9
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7.7
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0.5
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17.5
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0.51
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80
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R32
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127
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12.7
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17.5
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8.7
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0.64
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19
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0.65
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80
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R35
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136.52
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11.1
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15.9
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7.7
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0.55
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17.5
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0.56
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100
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R36
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149.22
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7.9
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12.7
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5.2
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0.34
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14.3
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0.37
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100
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100
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R37
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149.22
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11.1
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15.9
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7.7
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0.6
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17.5
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0.62
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100
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R38
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157.18
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15.9
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20.6
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10.5
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1.14
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22.2
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1.16
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100
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R39
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161.92
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11.1
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15.9
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7.7
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0.65
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17.5
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0.67
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125
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R40
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171.45
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7.9
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12.7
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5.2
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0.39
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14.3
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0.42
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125
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125
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R41
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180.98
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11.1
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15.9
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7.7
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0.73
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17.5
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0.75
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125
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R42
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190.5
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19
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23.8
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12.3
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1.88
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25.4
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1.9
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150
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R43
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193.68
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7.9
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12.7
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5.2
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0.44
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14.3
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0.48
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125
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R44
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193.68
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11.1
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15.9
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7.7
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0.78
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17.5
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0.8
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150
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150
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R45
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211.14
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11.1
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15.9
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7.7
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0.85
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17.5
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0.87
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150
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R46
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211.14
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12.7
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17.5
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8.7
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1.06
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19
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1.08
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150
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R47
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228.6
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19
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23.8
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12.3
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2.25
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25.4
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2.28
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200
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R48
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247.65
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7.9
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12.7
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5.2
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0.56
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14.3
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0.61
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200
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200
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R49
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269.88
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11.1
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15.9
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7.7
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1.08
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17.5
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1.12
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200
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R50
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269.88
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15.9
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20.6
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10.5
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1.95
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22.2
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1.99
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200
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R51
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279.40
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22.2
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27
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14.8
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3.69
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28.6
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3.65
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250
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R52
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304.8
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7.9
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12.7
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5.2
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0.99
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14.3
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0.75
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250
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250
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R53
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323.85
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11.1
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15.9
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7.7
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1.3
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17.5
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1.34
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250
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R54
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323.85
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15.9
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20.6
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10.5
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2.34
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22.2
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2.39
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250
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R55
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342.90
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28.6
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34.6
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19.8
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7.67
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36.5
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7.34
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300
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R56
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381
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7.9
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12.7
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5.2
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0.86
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14.3
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0.94
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300
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300
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R57
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381
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11.1
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15.9
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7.7
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1.53
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17.5
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1.53
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300
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R58
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381
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22.2
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27
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14.8
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5.03
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28.6
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4.97
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350
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R59
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396.88
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7.9
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12.7
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5.2
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0.9
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14.3
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0.97
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300
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R60
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406.4
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31.8
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38.1
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22.3
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11.08
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39.7
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10.48
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350
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R61
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419.1
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11.1
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15.9
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7.7
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1.68
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17.5
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1.73
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350
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R62
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419.1
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15.9
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20.6
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10.5
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3.03
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22.2
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3.09
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350
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R63
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419.1
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25.4
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31.8
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17.3
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7.55
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33.3
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7.31
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400
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R64
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454.02
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7.9
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12.7
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5.2
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1.03
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14.3
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1.11
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400
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R65
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469.9
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11.1
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15.9
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7.7
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1.89
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17.5
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1.94
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400
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R66
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469.9
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15.9
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20.6
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10.5
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3.1
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22.2
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3.46
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400
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R67
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469.9
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28.6
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34.9
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19.8
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10.51
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36.5
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10.06
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450
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R68
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517.52
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7.9
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12.7
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5.2
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1.17
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14.3
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1.27
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450
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R69
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533.4
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11.1
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15.9
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7.7
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2.14
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17.5
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2.21
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450
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R70
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533.4
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19
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23.8
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12.3
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5.25
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25.4
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5.33
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450
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R71
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533.4
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28.6
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34.9
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19.8
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11.93
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36.5
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11.42
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500
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R72
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558.8
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7.9
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12.7
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5.2
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1.26
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14.3
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1.37
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500
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R73
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584.2
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12.7
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17.5
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8.7
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2.93
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19
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2.98
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500
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R74
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584.2
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19
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23.8
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12.3
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5.75
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25.4
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5.84
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500
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R75
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584.2
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31.8
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38.1
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22.3
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15.92
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39.7
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15.06
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600
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R76
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673.1
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7.9
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12.7
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5.2
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1.52
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14.3
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1.65
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600
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R77
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692.15
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15.9
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20.6
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10.5
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5
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22.2
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5.1
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600
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R78
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692.15
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25.4
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34.8
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17.3
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12.7
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33.3
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12.07
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600
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R79
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692.15
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34.9
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41.2
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24.8
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22.55
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44.4
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21.99
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注:1.环垫材料及使用温度范围见表环垫材料及使用温度范围。
2.软铁的化学成分(质量分数)见表软铁的化学成分。
3.环垫的材料硬度值应比法兰材料硬度值低30～40HBS,其最大硬度值见表环垫材料最大硬度值。
4.环垫尺寸的极限偏差见表环垫尺寸的极限偏差。
