2.2.7 RTJ（钢圈）与不同压力等级法兰配合对应表
RTJ NUMBER
FLANGE SIZE
ANSI B 16.5
API 6A TYPE 6B
150
300/600
900
1500
2500
720/960
2000
3000
5000
R11
1/2
R12
1/2
1/2
R13
3/4
1/2
R14
3/4
3/4
R15
1
R16
1
1
1
3/4
1
1
1
1
R17
11/4
R18
11/4
11/4
11/4
1
11/4
11/4
11/4
11/4
R19
11/2
R20
11/2
11/2
11/2
11/2
11/2
11/2
11/2
R21
11/4
R22
2
R23
2
11/2
2
2
R24
2
2
2
2
R25
21/2
R26
21/2
2
21/2
21/2
R27
21/2
21/2
21/2
21/2
R28
21/2
R29
3
R30
3
R31
3
3
3
3
3
R32
3
R33
31/2
R34
31/2
R35
3
3
R36
4
R37
4
4
4
4
4
31/2
R38
4
R39
4
4
R40
5
R41
5
5
5
5
5
R42
5
RTJ NUMBER
FLANGE SIZE
ANSI B 16.5
API 6A TYPE 6B
150
300/600
900
1500
2500
720/960
2000
3000
5000
R43
6
R44
5
5
R45
6
6
6
6
6
R46
6
6
R47
6
R48
8
R49
8
8
8
8
8
R50
8
8
R51
8
R52
10
R53
10
10
10
10
10
R54
10
10
R55
10
R56
12
R57
12
12
12
12
12
R58
12
R59
14
R60
12
汽车钢圈大全