Stainless Steel Blind Flange
►Product Description
Stainless Steel Blind Flange is a vibration-stabilized sealing component engineered for piping systems under high-frequency vibration and cyclic load. Fabricated from 316L stainless steel with reinforced bolt seats, it maintains leak-tight integrity in dynamic operating environments like pump stations, compressors, power generation units, and offshore drilling platforms with constant mechanical vibration.
Its key advantages are anti-vibration performance and structural stability. Equipped with self-locking bolts and shock-absorbing gasket grooves, it prevents bolt loosening and gasket displacement caused by long-term vibration—eliminating potential leaks in dynamic. The forged integral structure enhances rigidity, resisting deformation under cyclic load, while the precision-machined sealing face ensures consistent contact pressure even during frequent vibration.
Compliant with API 6A, ASME B16.5, and EN 1092-1 standards, our blind flanges cover sizes from 1/2" to 48" and pressure classes up to Class 600, suitable for medium to high-pressure dynamic systems. Each unit undergoes vibration fatigue testing and torque retention verification, meeting industrial standards for dynamic sealing. The matched shock-absorbing gaskets (metal-wound, aramid fiber) further boost anti-vibration capability.
As a dynamic flange specialist, we optimize designs for vibration resistance. Our team provides tailored solutions—including custom bolt locking mechanisms and gasket matching for specific vibration frequencies—and offers technical guidance on installation torque and anti-loosening measures. We also supply torque verification tools to ensure on-site installation meets anti-vibration requirements.
For high-frequency vibration piping systems demanding stable, leak-proof sealing, our Stainless Steel Blind Flange is the trusted choice. Partner with us for durable, anti-vibration flanges that ensure long-term reliability in dynamic operating environments.
►Product Size
| DN |
Pipe OD |
Connection Size |
Flange Thickness(mm) C |
Flagne ID |
| A |
B |
Flange OD |
Bolt Hole Circle Diameter |
A |
B |
| 10 |
17.2 |
14 |
90 |
60 |
14 |
18 |
15 |
| 15 |
21.3 |
18 |
95 |
65 |
14 |
22.5 |
19 |
| 20 |
26.9 |
25 |
105 |
75 |
16 |
27.5 |
26 |
| 25 |
33.7 |
32 |
115 |
85 |
16 |
34.5 |
33 |
| 32 |
42.4 |
38 |
140 |
100 |
18 |
43.5 |
39 |
| 40 |
48.3 |
45 |
150 |
110 |
18 |
49.5 |
46 |
| 50 |
60.3 |
57 |
165 |
125 |
19 |
61.5 |
59 |
| 65 |
76.1 |
76 |
185 |
145 |
20 |
77.5 |
78 |
| 80 |
88.9 |
89 |
200 |
160 |
20 |
90.5 |
91 |
| 100 |
114.3 |
108 |
220 |
180 |
22 |
116 |
110 |
| 125 |
139.7 |
133 |
250 |
210 |
22 |
143.5 |
135 |
| 150 |
168.3 |
159 |
285 |
240 |
24 |
170.5 |
161 |
| 200 |
219.1 |
219 |
340 |
295 |
24 |
221.5 |
222 |
| 250 |
273 |
273 |
395 |
350 |
26 |
276.5 |
276 |
| 300 |
323.9 |
325 |
445 |
400 |
26 |
328 |
328 |
| 350 |
355.6 |
377 |
505 |
460 |
28 |
360 |
381 |
| 400 |
406.4 |
426 |
565 |
515 |
32 |
411 |
430 |
| 450 |
457 |
480 |
615 |
565 |
36 |
462 |
485 |
| 500 |
508 |
530 |
670 |
620 |
38 |
513.5 |
535 |
| 600 |
610 |
630 |
780 |
725 |
42 |
616.5 |
636 |
►Shot Shoot



►FAQ
Q1: Delivery time?
A: 1- 7 days for small order.10- 20 days for big order.
Q2: Are you manufacturer or trading company?
A: We are not only manufacturer but also a trading company,we have more than 12years export experience.
Q3: What is your minimum order quantity?
A: The MOQ for each product is different, so it would be recommended to refer to the detail page of the product you are interested in. If you need further clarification, send me the product link, and I will reply as soon as possible.
Q4: Do you provide samples ? Is it free or extra ?
A: Yes, we could offer the sample for free charge but do not pay the cost of freight.
Q5: How long is your production lead time?
A: Generally it is 5-10 days if the goods are in stock. or it is 15-20 days if the goods are not in stock, it is according to quantity.