When purchasing flange should be written clear the following contents:
Flange (flange cover) A B C-D E F
A, standard number:
According to ministry of chemical industry (HG) standard flange unified reported marked as: HG20592-97.
B, flange type according to the provisions of the code name a table.
C, flange nominal given.it DN (mm).
D, flange PN nominal pressure (MPa).
E, seal face form according to the provisions of the code table 2.
F, material number.
Watch a flange type code:
Flange type flange type code
Format flat welding flanges PL
Take the flat welding flange SO
Take the butt weld flange WN
Overall flange IF
Socket weld flange SW
Thread flange Th
Butt weld ring loose set of flange PJ/SE
Flat welded loop loose set of flange PJ/PR
Flange cover BL
Lining flange cover BL (S)
Table 2 seal face form code:
Seal face form code
Tu face RF
Concave FM
Raised face M
Tenon face T
Slot face G
Whole plane FF
Ring LianJieMian RJ
Flange given.it nominal DN (mm) sequence: 10, 15, 20, 25, 32, 40, 50, 65, 80, 100, 125, 150, 200, 250, 300, 350, 400, 450, 500, 600, 700, 800, 900, 1000, 1200, 1400, 1600, 1800, 2000.
Nominal pressure flanges PN (MPa) sequence: 0.25, 0.6, 1.0, 1.6, 2.5, 4.0, 6.3, 10.0, 16.0,
25.0.
Example 1:200 mm, nominal given.it nominal pressure 0.6 MPa, the metric system with this face plate flat tube welding steel pipe flanges, materials for Q235-A, notes for:
Flange HG 20592 PL200-0.6 RF Q235A
Example 2:300 mm, nominal given.it nominal pressure 2.5 MPa, with the metric system of the tube with neck flat steel welded convex flange, material of 20 steel, notes for:
Flange HG 20592 SO300-2.5 M 20
Example 3:100 mm, nominal given.it nominal pressure 10.0 MPa, the metric system of the tube with concave neck butt weld ends with steel pipe flanges, materials for 16 Mn, notes for:
Flange HG 20592 WN100-10.0 FM 16 Mn