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Carbon Steel Spectacle Blind Flange
Carbon Steel Spectacle Blind Flange are used in separating pipe systems for the connection. It is a steel plate divided into two discs of a certain thickness. Out of these two discs, one disc is of a solid plate and other is a ring whose inner diameter is equal to that of a flange. Spectacle Blinds is required in the systems that regularly need to be separated from other installations. Generally, it is mounted in the “Open” position so that flow through the pipe is possible. If it is placed in the “close” position and if it is rotated, then, the pipe is blanked off and no flow is feasible. The whole idea of a spectacle blind is to ensure that an item of equipment is properly and securely blanked off with no leakage or no flow through a valve during maintenance.

The whole idea of a spectacle blind is so that one can be absolutely sure that an item of equipment is properly and securely blanked off with no possibility of any flow or leakage through a valve during maintenance. The flow can be diverted to other items of equipment but not just bypassed around the blank as this would compromise the safety function of the spectacle blind. The flow has to valved off and pressure relieved prior to loosening flange bolts and swinging the blind.

Product Features:

  • Corrosion resistant
  • Accurate dimensions
  • Can sustain high pressure & temperature load
  • Rust proof finish
  • Smooth transition from flange thickness to pipe
  • Ensure excellent stress distribution
  • Can be easily radio graphed for flaw detection
  • Can be easily welded to a pipe or fitting with a single full penetration

Product Usage & Application:

  • Useful in Paper & Pulp Companies
  • Useful in High Pressure Applications
  • Useful in Oil and Gas Industry
  • Useful in Chemical Refinery
  • Useful in Pipeline
  • Useful in High Temperature Application
  • Useful in Water Pipe Line
  • Useful in Nuclear Power Plants
  • Useful in Food Processing and Dairy Industries
  • Useful in Boiler & Heat Exchangers

Standard Specification:

Type: Spectacle Blind Flange
Dimension/Standard: ASME B16.9, ANSI B16.9, ASME B16.28, ANSI B16.28, ANSI B16.25, ASME / ASTM SA / A403, ASTM A 234, ASTM / ASME A/SA 182, ASTM SA 182, ASME B16.11, ANSI B16.11, ASTM A105, ASTM A182

Material & Grade :

Carbon Steel :
Grade: WPB , WPBW, WPHY 42, WPHY 46, WPHY 52, WPH 60, WPHY 65 & WPHY 70

Other grades also available :

Monel :
Grade: Monel 400, Monel K500, Monel R-405
Nickel :
Grade: Nickel 200, Nickel 201
Inconel :
Grade: Inconel 600, Inconel 601, Inconel 625, Inconel 718
Incoloy :
Grade: Incoloy 800, Inconel 800H, 800HT
Hastalloy :
Grade: Hastalloy B2, Hastalloy B3, Hastalloy C22, Hastalloy C276, Hastalloy X
Titanium :
Grade: Gr1, Gr2, Gr3, Gr5, Gr7, Gr11
Stainless Steel :
Grade: 304, 304L, 304H, 309, 309S, 316, 316L, 316H, 310, 310S, 317, 317L, 321, 347, 904L
Duplex Steel:
Grade: UNS F44, F45, F51, F53, F55, F60, F61
Alloy Steel:
Grade : WP 1, WP 5, WP 9, WP 11, WP 12, WP 22, WP 91

Chemical & Mechanical Properties:

CHEMICAL ANALYSIS Mechnical Properties SPECIFIC REQUIREMENT
Tensile Strength Yield Strength Elongation
Specification WT C% Mn% P% MAX S% MAX Si% Cr% Mo% Mpa Mpa 50mm MIN Longitudinal
ASTM A 53/A
ASTM A 53/B
ASTM A 106/A
ASTM A 106/B
ASTM A 106/C
AW
AW
AW
AW
AW
0.25MAX
0.30MAX
0.25MAX
0.30MAX
0.35MAX
0.95MAX
1.20MAX
0.27-0.93
0.29-1.06
0.29-1.06
0.050
0.050
0.025
0.025
0.025
0.060
0.060
0.025
0.025
0.025
-
-
0.10MIN
0.10MIN
0.10MIN
-
-
0.40MAX
0.40MAX
0.40MAX
-
-
0.15MAX
0.15MAX
0.15MAX
331MIN
413MIN
330MIN
415MIN
485MIN
207 MIN
240MIN
205MIN
240MIN
275MIN
36
29.5
35/28
30/22
30/22
Cr Mo Cu Ni Va
0.40 0.15 0.40 0.40 0.08
five elements not to exceed 1%
ASTM A 179
ASTM A 214
ASTM A 192
ASTM A 209/T1
ASTM A 209/T1a
ASTM A 209/T1B
ASTM A 210/A-1
ASTM A 210/C
MW
MW
MW
MW
MW
MW
MW
MW
0.06-018
0.18MAX
0.06-0.18
0.10-0.20
0.15-0.25
0.14MAX
0.27MAX
0.35MAX
0.27-0.63
0.27-0.63
0.27-0.63
0.30-0.80
0.30-0.80
0.30-0.80
0.93MAX
0.29-1.06
0.048
0.050
0.048
0.045
0.045
0.045
0.048
0.048
0.048
0.050
0.048
0.045
0.045
0.045
0.058
0.058
-
-
0.25MAX
0.10-0.50
0.10-0.50
0.10-0.50
0.10MIN
0.10MIN
-
-
-
-
-
-
-
-
-
-
-
0.44-0.65
0.44-0.65
0.44-0.65
-
-
325MIN
385MIN
325MIN
380MIN
365MIN
415MIN
415MIN
485MIN
180MIN
180MIN
180MIN
205MIN
195MIN
220MIN
255MIN
275MIN
35.0
35.0
35.0
30/22
30/22
30/22
30/22
30/22
Hardness 72 HRB MAX
Hardness 72 HRB MAX
Hardness 77 HRB MAX
Hardness 80 HRB MAX
Hardness 81 HRB MAX
Hardness 77 HRB MAX
Hardness 79 HRB MAX
Hardness 89 HRB MAX
ASTM A 213/T2
ASTM A 213/T5
ASTM A 213/T11
ASTM A 213/T12
ASTM A 213/T22
MW
MW
MW
MW
MW
0.10/0.20
0.15MAX
0.15MAX
0.15MAX
0.15MAX
0.30-0.61
0.30-0.60
0.30-0.60
0.30-0.61
0.30-0.60
0.045
0.030
0.030
0.045
0.030
0.045
0.030
0.030
0.045
0.030
0.10-0.30
0.50MAX
0.50-1.00
0.50MAX
0.50MAX
0.50-0.81
4.00-6.00
1.00-1.50
0.80-1.25
1.90-2.60
0.44-0.65
0.44-0.65
0.44-0.65
0.44-0.65
0.87-1.13
415MIN
415MIN
415MIN
415MIN
415MIN
205MIN
205MIN
205MIN
220MIN
205MIN
30/22
30/22
30/22
30/22
30/22
Hardness 85 HRB MAX
Hardness 85 HRB MAX
Hardness 85 HRB MAX
Hardness 85 HRB MAX
Hardness 85 HRB MAX
ASTM A 333/1
ASTM A 333/6
ASTM A 334/1
ASTM A 334/6
AW
AW
AW
AW
0.30MAX
0.30MAX
0.30MAX
0.30MAX
0.40-1.06
0.29-1.06
0.40-1.06
0.29-1.06
0.025
0.025
0.025
0.025
0.025
0.025
0.025
0.025
-
0.10MIN
-
0.10MIN
-
-
-
-
-
-
-
-
380MIN
415MIN
380MIN
415MIN
205MIN
240MIN
205MIN
240MIN
25/20
30/22
35/28
30/22
Impact AS-50F
FOR 40X10J/18/14
-50F 40X10J/18/14
90 HRB MAX
ASTM A 335/P1
ASTM A 335/P2
ASTM A 335/P5
ASTM A 335/P9
ASTM A 335/P11
ASTM A 335/P12
ASTM A 335/P22
AW
AW
AW
AW
AW
AW
AW
0.10-0.20
0.10-0.20
0.15MAX
0.15MAX
0.15MAX
0.15MAX
0.15MAX
0.30-0.80
0.30-0.61
0.30-0.60
0.30-0.60
0.30-0.60
0.30-0.61
0.30-0.60
0.025
0.025
0.025
0.025
0.025
0.025
0.025
0.025
0.025
0.025
0.025
0.025
0.025
0.025
0.10-0.50
0.10-0.30
0.50MAX
0.25-1.00
0.50-1.00
0.50MAX
0.50MAX
-
0.50-0.81
4.00-6.00
8.00-10.00 1.00-1.50
0.80-1.25
1.90-2.60
0.44-0.65
0.44-0.65
0.45-0.65
0.09-1.10
0.44-0.65
0.44-0.65
0.87-1.13
380MIN
380MIN
415MIN
415MIN
415MIN
415MIN
415MIN
205MIN
205MIN
205MIN
172MIN
205MIN
205MIN
205MIN
30/22
30/22
30/22
30/22
30/22
50/22
30/22
BS/3059/1/33
BS/3059/2/33
BS/3059/2/45
BS/3059/2/620
0.15MAX
0.15MAX
0.12-0.18
0.10-0.15
0.30-0.70
0.40-0.70
0.90-1.20
0.40-0.70
0.050
0.050
0.035
0.040
0.050
0.050
0.035
0.040
-
0.10-0.35
0.10-0.35
0.10-0.35
-
-
-
0.70-1.10
-
-
-
0.45-0.65

324-441
324-441
441-560
441-618
186MIN
186MIN
245MIN
235MIN
25
21
22
22
DIN/17175/ST35.8
DIN/17175/ST45.8
DIN/17175/15MO3
DIN/17175/13CrMO44
DIN/17175/10CrM910
0.17MAX
0.22MAX
0.12-0.20
0.10-0.18
0.15MAX
0.40MIN
0.45MIN
0.50-0.80
0.40-0.70
0.40-0.60
0.040
0.040
0.040
0.040
0.040
0.040
0.040
0.040
0.040
0.040
0.35MAX
0.10-0.35
0.10-0.35
0.10-0.35
0.15-0.50
-
-
-
0.70-1.60
2.0-2.5
-
-
0.25-0.35
0.40-0.50
0.9-1.10
340-441
441-540
441-540
441-570
441-570
235MIN
255MIN
284MIN
294MIN
294MIN
25
25
21
22
22
ASTM A 199/T5
ASTM A 199/T11
ASTM A 199/T22
ASTM A 199/T4
ASTM A 199/T7
ASTM A 200/T5
ASTM A 200/T11
ASTM A 200/T22
ASTM A 200/T4
ASTM A 200/T7
ASTM A 199/T9
MW
MW
MW
MW
MW
MW
MW
MW
MW
MW
MW
0.50-0.15
0.50-0.15
0.50-0.15
0.15MAX
0.15MAX
0.15MAX
0.50-0.15
0.50-0.15
0.50-0.15
0.15MAX
0.15MAX
0.30-0.60
0.30-0.60
0.30-0.60
0.30-0.60
0.30-0.60
0.30-0.60
0.30-0.60
0.30-0.60
0.30-0.60
0.30-0.60
0.30-0.60
0.030
0.030
0.030
0.030
0.030
0.030
0.030
0.030
0.030
0.030
0.030
0.030
0.030
0.030
0.030
0.030
0.030
0.030
0.030
0.030
0.030
0.030
0.50MAX
0.50-1.00
0.50MAX
0.50-1.00
0.50-1.00
0.50-1.00
0.50-1.00
0.50MAX
0.50-1.00
0.50-1.00
0.25-1.00
4.00-6.00
1.00-1.50
1.90-2.60
2.15-2.85
6.00-8.00
4.00-6.00
1.00-1.50
1.90-2.60
2.15-2.85
6.00-8.00
8.00-10.0
0.45-0.65
0.44-0.65
0.87-1.13
0.44-0.65
0.45-0.65
0.45-0.65
0.44-0.65
0.87-1.13
0.44-0.65
0.45-0.65
0.90-1.10
415MIN
415MIN
415MIN
415MIN
415MIN
415MIN
415MIN
415MIN
415MIN
415MIN
415MIN
170MIN
170MIN
170MIN
170MIN
170MIN
170MIN 170MIN
170MIN
170MIN
170MIN
170MIN
30/22
30/22
30/22
30/22
30/22 30/22
30/22
30/22
30/22
30/22
30/22
Hardness 85 HRB MAX
Hardness 85 HRB MAX
Hardness 85 HRB MAX
Hardness 85 HRB MAX
Hardness 85 HRB MAX
Hardness 85 HRB MAX
Hardness 85 HRB MAX
Hardness 85 HRB MAX
Hardness 85 HRB MAX
Hardness 85 HRB MAX
Hardness 85 HRB MAX

Shipping Countries :

UAE, Bahrain, Italy, Indonesia, Malaysia, United States, China, Brazil, Nigeria, Kuwait, Dubai, Iran, Germany, UK, Canada, Russia, Australia, Sri Lanka, Vietnam, Turkey, New Zealand, South Africa, Kazakhstan, Saudi Arabia etc...

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  • We have many years of experience in this field as we serve the highest level of quality.
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