Hot-die forged stainless steel flanges with refined grain structure, ensuring superior tensile strength and corrosion resistance.
Comprehensive Flange Types
Weld Neck (WN) | Slip-On (SO) | Blind (BL)
Threaded (TH) | Socket Weld (SW) | Orifice Flanges
Loose (LJ) | Hubbed Butt Weld | Custom Specials
Dimensional Coverage
Standard Range: DN15-DN1500 (½" to 60")
Pressure Classes: 150LB to 2500LB (ASME B16.5 compliant)
Manufacturing Standards
ASME: ASME B16.5/16.47 | MSS SP44
EU: DIN 2527-2642 | EN 1092-1
JIS/GOST: JIS B2220 | GOST 12820
Custom Engineering: Non-standard designs per DRAWINGS
Materials
Austenitic SS: 304/304L/316L (1.4301, 1.4404, etc.)
Duplex Steel: F51/S31803, F53/S32750 (Chloride Resistance)
Super Alloys: 904L, 317L (UNS S31703) for Acid/Caustic Service
304 Stainless steel: It has good corrosion resistance, heat resistance and processing properties, can resist general acid and alkali corrosion, and is widely used in various industrial fields and daily life.
316 Stainless steel: Molybdenum is added to the 304, and its corrosion resistance is stronger, especially chloride ion corrosion resistance. It is often used in areas such as marine environment, chemical industry, and medical care that require high corrosion resistance.
321 Stainless steel: Added titanium elements, improving the material's resistance to intergranular corrosion, and is suitable for high-temperature environments, such as aerospace, electricity and other fields.
The specifications of stainless steel flanges include nominal diameter, pressure level and other parameters.
Various models can be customized according to customer needs
There are many stainless steel flange standards. The following is a common national standard GB/T 9119-2010 to introduce some detailed specifications, models and dimensions from DN15 to DN1500:
☆Plate flat welding flange(PL)
|
Nominal diameter DN |
Outer path D |
Bolt hole center circle diameter K |
Bolt hole diameter L |
Number of bolts N |
Flange thickness C |
||
|
15 |
95 |
65 |
14 |
4 |
14 |
||
|
20 |
105 |
75 |
14 |
4 |
16 |
||
|
25 |
115 |
85 |
14 |
4 |
16 |
||
|
32 |
140 |
100 |
18 |
4 |
18 |
||
|
40 |
150 |
110 |
18 |
4 |
18 |
||
|
50 |
165 |
125 |
18 |
4 |
20 |
||
|
65 |
185 |
145 |
18 |
4 |
20 |
||
|
80 |
200 |
160 |
18 |
8 |
20 |
||
|
100 |
220 |
180 |
18 |
8 |
22 |
||
|
125 |
250 |
210 |
18 |
8 |
22 |
||
|
150 |
285 |
240 |
22 |
8 |
24 |
||
|
200 |
340 |
295 |
22 |
8 |
26 |
||
|
250 |
395 |
350 |
22 |
12 |
28 |
||
|
300 |
445 |
400 |
22 |
12 |
30 |
||
|
400 |
565 |
515 |
26 |
16 |
36 |
||
|
500 |
670 |
620 |
26 |
20 |
40 |
||
|
600 |
780 |
725 |
30 |
20 |
44 |
||
|
800 |
990 |
920 |
33 |
24 |
50 |
||
|
1000 |
1210 |
1120 |
36 |
28 |
56 |
||
|
1200 |
1440 |
1340 |
39 |
32 |
64 |
||
|
1500 |
1755 |
1640 |
42 |
36 |
78 |
||
☆Flat welded flange with neck (SO)
|
Nominal diameter DN |
Outer path D |
Bolt hole center circle diameter K |
Bolt hole diameter L |
Number of bolts n |
Flange thicknessC |
Neck outer diameter B |
||
|
15 |
95 |
65 |
14 |
4 |
14 |
22 |
||
|
20 |
105 |
75 |
14 |
4 |
16 |
27 |
||
|
25 |
115 |
85 |
14 |
4 |
16 |
34 |
||
|
32 |
140 |
100 |
18 |
4 |
18 |
42 |
||
|
40 |
150 |
110 |
18 |
4 |
18 |
48 |
||
|
50 |
165 |
125 |
18 |
4 |
20 |
60 |
||
|
65 |
185 |
145 |
18 |
4 |
20 |
76 |
||
|
80 |
200 |
160 |
18 |
8 |
20 |
89 |
||
|
100 |
220 |
180 |
18 |
8 |
22 |
114 |
||
|
125 |
250 |
210 |
18 |
8 |
22 |
140 |
||
|
150 |
285 |
240 |
22 |
8 |
24 |
168 |
||
|
200 |
340 |
295 |
22 |
8 |
26 |
219 |
||
|
250 |
395 |
350 |
22 |
12 |
28 |
273 |
||
|
300 |
445 |
400 |
22 |
12 |
30 |
324 |
||
|
400 |
565 |
515 |
26 |
16 |
36 |
406 |
||
|
500 |
670 |
620 |
26 |
20 |
40 |
508 |
||
|
600 |
780 |
725 |
30 |
20 |
44 |
610 |
||
|
800 |
990 |
920 |
33 |
24 |
50 |
813 |
||
|
1000 |
1210 |
1120 |
36 |
28 |
56 |
1016 |
||
|
1200 |
1440 |
1340 |
39 |
32 |
64 |
1220 |
||
|
1500 |
1755 |
1640 |
42 |
36 |
78 |
1524 |
||
The above are only some specifications and sizes. In actual applications, there are many types such as neck butt-welded flanges (WN), socket-welded flanges (SW), and the sizes may vary slightly under different standards.
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