Welwin Pipes & Fittings is a dynamic group, which was established over a decade ago to cater to growing demands of
Blind Flanges standards in ASME / ANSI B16.5 Flanges,ASME/ANSI B16.47 etc in all materials like Stainless Steel , Carbon Steel &
High Nickel Alloys. We Manufacture, Export and Supply flanges which meets with national
and international quality standards and producing base which owns equipments conforming to international technical level
and is well equipped with a whole set of advanced plasma refining equipments.
We export our high quality Blind flanges to Kuwait, Egypt and Qatar.
Range: ½” (15 NB) to 48” (1200NB)
Pressure Ratings: 150 LBS, 300 LBS, 600 LBS, 900 LBS, 1500 LBS, 2500 LBS ASA 150, ASA 300, PN 6,10,16,25, 40,64,100,160 ETC. available with NACE MR 01-75
ANSI/ASME/ASA B16.5 150lb/sq.in. Flange BLIND-RF |
|||||||
ø |
D |
b |
g |
k |
Holes |
l |
Kg. |
1/2" |
88,9 |
11,1 |
34,9 |
60,3 |
4 |
15,9 |
0,400 |
3/4" |
98,4 |
12,7 |
42,9 |
69,8 |
4 |
15,9 |
0,700 |
1" |
107,9 |
14,3 |
50,8 |
79,4 |
4 |
15,9 |
0,900 |
1 1/4" |
117,5 |
15,9 |
63,5 |
88,9 |
4 |
15,9 |
1,300 |
1 1/2" |
127,0 |
17,5 |
73,0 |
98,4 |
4 |
15,9 |
1,600 |
2" |
152,4 |
19,0 |
92,1 |
120,6 |
4 |
19,0 |
2,600 |
2 1/2" |
177,8 |
22,2 |
104,8 |
139,4 |
4 |
19,0 |
4,100 |
3" |
190,5 |
23,8 |
127,0 |
152,4 |
4 |
19,0 |
5,000 |
3 1/2" |
215,9 |
23,8 |
139,7 |
177,8 |
8 |
19,0 |
6,400 |
4" |
228,6 |
23,8 |
157,2 |
190,5 |
8 |
19,0 |
7,100 |
5" |
254,0 |
23,8 |
185,7 |
215,9 |
8 |
22,2 |
9,000 |
6" |
279,4 |
25,4 |
215,9 |
241,3 |
8 |
22,2 |
11,800 |
8" |
342,9 |
28,6 |
269,9 |
298,4 |
8 |
22,2 |
21,000 |
10" |
406,4 |
30,2 |
323,4 |
361,9 |
12 |
25,4 |
30,000 |
12" |
482,6 |
31,7 |
381,0 |
431,8 |
12 |
25,4 |
45,000 |
14" |
533,4 |
34,9 |
412,7 |
476,2 |
12 |
28,6 |
59,000 |
16" |
596,9 |
36,5 |
469,9 |
539,9 |
16 |
28,6 |
79,000 |
18" |
635,0 |
39,7 |
533,4 |
577,8 |
16 |
31,7 |
97,000 |
20" |
698,5 |
42,9 |
584,2 |
635,0 |
20 |
31,7 |
124,000 |
22" |
749,3 |
46,0 |
641,2 |
692,1 |
20 |
34,9 |
151,000 |
24" |
812,8 |
47,6 |
692,1 |
749,3 |
20 |
34,9 |
188,000 |
ANSI/ASME/ASA B16.5 300lb/sq.in. Flange BLIND-RF |
|||||||
ø |
D |
b |
g |
k |
Holes |
l |
Kg. |
1/2" |
95,2 |
14,3 |
34,9 |
66,7 |
4 |
15,9 |
0,700 |
3/4" |
117,5 |
15,9 |
42,9 |
82,5 |
4 |
19,0 |
1,200 |
1" |
123,8 |
17,5 |
50,8 |
88,9 |
4 |
19,0 |
1,500 |
1 1/4" |
133,3 |
19,0 |
63,5 |
98,4 |
4 |
19,0 |
2,000 |
1 1/2" |
155,6 |
20,6 |
73,0 |
114,3 |
4 |
22,2 |
2,900 |
2" |
165,1 |
22,2 |
92,1 |
127,0 |
8 |
19,0 |
3,400 |
2 1/2" |
190,5 |
25,4 |
104,8 |
149,2 |
8 |
22,2 |
5,100 |
3" |
209,5 |
28,6 |
127,0 |
168,3 |
8 |
22,2 |
7,000 |
3 1/2" |
228,6 |
30,2 |
139,7 |
184,1 |
8 |
22,2 |
8,900 |
4" |
254,0 |
31,7 |
157,2 |
200,0 |
8 |
22,2 |
11,800 |
5" |
279,4 |
34,9 |
185,7 |
234,9 |
8 |
22,2 |
15,500 |
6" |
317,5 |
36,5 |
215,9 |
269,9 |
12 |
22,2 |
21,300 |
8" |
381,0 |
41,3 |
269,9 |
330,2 |
12 |
25,4 |
35,200 |
10" |
444,5 |
47,6 |
323,8 |
387,3 |
16 |
28,6 |
57,000 |
12" |
520,7 |
50,8 |
381,0 |
450,8 |
16 |
31,7 |
82,000 |
14" |
584,2 |
54,0 |
412,7 |
514,3 |
20 |
31,7 |
106,000 |
16" |
647,7 |
57,1 |
469,9 |
571,5 |
20 |
34,9 |
140,000 |
18" |
711,2 |
60,3 |
533,4 |
628,6 |
24 |
34,9 |
178,000 |
20" |
774,7 |
63,5 |
584,2 |
685,8 |
24 |
34,9 |
223,000 |
22" |
838,2 |
66,7 |
641,2 |
742,9 |
24 |
41,3 |
270,000 |
24" |
914,4 |
69,8 |
692,1 |
812,8 |
24 |
41,3 |
345,000 |
ANSI/ASME/ASA B16.5 600lb/sq.in. Flange BLIND-RF |
|||||||
ø |
D |
b |
g |
k |
Holes |
l |
Kg. |
1/2" |
95,2 |
14,3 |
34,9 |
66,7 |
4 |
15,9 |
0,700 |
3/4" |
117,5 |
15,9 |
42,9 |
82,5 |
4 |
19,0 |
1,200 |
1" |
123,8 |
17,5 |
50,8 |
88,9 |
4 |
19,0 |
1,500 |
1 1/4" |
133,3 |
20,6 |
63,5 |
98,4 |
4 |
19,0 |
2,000 |
1 1/2" |
155,6 |
22,2 |
73,0 |
114,3 |
4 |
22,2 |
3,200 |
2" |
165,1 |
25,4 |
92,1 |
127,0 |
8 |
19,0 |
4,300 |
2 1/2" |
190,5 |
28,6 |
104,8 |
149,2 |
8 |
22,2 |
6,000 |
3" |
209,5 |
31,7 |
127,0 |
168,3 |
8 |
22,2 |
8,000 |
3 1/2" |
228,6 |
34,9 |
139,7 |
184,1 |
8 |
25,4 |
10,500 |
4" |
273,0 |
38,1 |
157,2 |
215,9 |
8 |
25,4 |
18,000 |
5" |
330,2 |
44,4 |
185,7 |
266,7 |
8 |
28,6 |
28,500 |
6" |
355,6 |
47,6 |
215,9 |
292,1 |
12 |
28,6 |
35,500 |
8" |
419,1 |
55,6 |
269,9 |
349,2 |
12 |
31,7 |
58,000 |
10" |
508,0 |
63,5 |
323,8 |
431,8 |
16 |
34,9 |
98,000 |
12" |
558,8 |
66,7 |
381,0 |
488,9 |
20 |
34,9 |
125,000 |
14" |
603,2 |
69,8 |
412,7 |
527,0 |
20 |
38,1 |
151,000 |
16" |
685,8 |
76,2 |
469,9 |
603,2 |
20 |
41,3 |
215,000 |
18" |
742,9 |
82,5 |
533,4 |
654,0 |
20 |
44,4 |
287,000 |
20" |
812,8 |
88,9 |
584,2 |
723,9 |
24 |
44,4 |
366,000 |
22" |
869,9 |
95,2 |
641,2 |
777,9 |
24 |
47,6 |
437,000 |
24" |
939,8 |
101,6 |
692,1 |
838,2 |
24 |
50,8 |
532,000 |
Dimensional Tolerances of Blind Flanges ASME B16.5
| Outside Diameter ≤ 24 = 1.6 mm | > 24 = ± 3.2 mm |
Inside Diameter not applicable |
| Diameter of Contact Face 1.6 mm Raised Face = ± 0.8 mm 6.35 mm Raised Face, Tongue & Groove / Male-Female = ± 0.4 mm |
Outside Diameter of Hub ≤ 12 = + 2.4 mm / - 1.6 mm | ≥ 14 = ± 3.2 mm |
| Diameter of Counterbore not applicable |
Drilling Bolt Circle = 1.6 mm | Bolt Hole Spacing = ± 0.8 mm Eccentricity of Bolt Circle with Respect to Facing ≤ 2½ = 0.8 mm max. | ≥ 3 = 1.6 mm max. |
| Thickness ≤ 18 = + 3.2 mm / - 0 | ≥ 20 = + 4.8 mm / - 0 |
Length thru Hub ≤ 18 = + 3.2 mm / - 0.8 mm | ≥ 20 = + 4.8 mm / - 1.6 mm |
Notes
1. Dimensions are in millimeters unless otherwise indicated.
2. The length of the stud bolt does not include the height of the chamfers (points).
Packaging: Blind Flanges is sleeved into plastic bag individually, ten pieces wrapped with water-proof material, bundled with nylon rope. Clear labels are tagged on the outside of the package for easy identification of the quantity and product I.D. Great care is taken during operation and transportation.
Prevent any damage.
During transportation items are tagged, packed in plastic bags and closed in carton boxes or seaworthy wooden cases.
plywood case,pallet and according to customer's requirment
Marking: Blind Flanges are marked with alloy name, outside diameter, wall thickness and heat number. Additional information like standard and alloy numbers can be added on request.
Stainless Steel
Blind Flanges
Carbon Steel
Blind Flanges
Duplex & Super duplex Steel
Blind Flanges
Nickel Alloy
Blind Flanges
Inconel
Blind Flanges
Incoloy
Blind Flanges
Hastelloy
Blind Flanges
Monel
Blind Flanges