Item

Chinese Standard

Steel Grade

USA Standard

ASTM

1 Plate Slip-on

GB9119-88
HG20593-97
JB/T81-94

20

16Mn

15CrMo

12Cr1MoV

1Cr5Mo

0Cr19Ni9

00Cr19Ni10

0Cr17Ni12Mo2

00Cr17Ni14Mo2

ANSI B16.5

ANSI B16.47

API605

MSS SP-44

A105

A350-LF2

A182-F12

A182-F11

A182-F5

A182-F304

A182-F304L

A182-F316

A182-F316L

2 Slip-on

GB9116-88
SH3406-96
HG20594-97
HG20616-97

3 Welded Neck

GB9115-88
SH3406-96
HG20595-97
HG20617-97
JB/T82-94

4 Socket Welded

GB9117-88
SH3406-96
HG20597-97
HG20619-97

5 Threaded

GB9114-88
SH3406-96
HG20598-97
HG20620-97

6 Lap Joint

GB9122-88
SH3406-96
HG20599-97
HG20621-97
JB/T85-94

7 Blind

GB9123-88
SH3406-96
HG20601-97
HG20622-97
JB/T86-94