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Contents-A popular category of pipe flange is the blind flange. A blind flange is used to close ends of piping systems. It is a kind of round plate with no center hold but with all the proper bolt holes. We can offer a comprehensive range of Blind Flange for the right technical solution. MD Exports LLP manufacture & export wide selections of ANSI B16.5 Blind Flange & ASME B16.47 Blind Flange at most attractive price as per customer requirements, we can also manufacture Blind Flange in ASTM/ASME/ANSI grades as per our customer budget, we enjoy the reputation supplying Blind Flange at cheapest in steel industries around the globe.
Blind Flange Description
Other Name: BLIND FLANGE, BLRF FLANGE, BLFF FLANGE, BLIND FLANGE RF, B16.5, ASTM A105, BLANK FLANGE
Blind pipe flanges are pipe flanges used to seal the end of a piping system or pressure vessel openings to prevent flow. Blind pipe flanges are commonly used for pressure testing the flow of liquid or gas through a pipe or vessel.
Standard: ANSI, ASME, ASA B16.5
Size: 1/2” - 48”
Material: ASTM A105, CARBON STEEL
Supply Ability: 3000Ton/Month
Process: Forged, Forging
Packing: Plywood Pallets
Payment Terms: T/T, L/C, D/P
BLIND FLANGE, BLANK FLANGE, BLFF FLANGE, BLRF FLANGE, monthly output 3000Ton, material carbon steel & Stainless Steel.
Norms & Types
1) BLIND FLANGE RF, BLRF FLANGE, BLANK FLANGE, BL FLANGE RAISED FACE, CLASS 150, 150LBS, 150#, 1/2" - 48", ASTM A105.
2) BLIND FLANGE RF, BLRF FLANGE, BLANK FLANGE, BL FLANGE RAISED FACE, CLASS 300, 300LBS, 300#, 1/2" - 48", ASTM A105.
3) BLIND FLANGE RF, BLRF FLANGE, BLANK FLANGE, BL FLANGE RAISED FACE, CLASS 600, 600LBS, 600#, 1/2" - 48", ASTM A105.
4) BLIND FLANGE RF, BLRF FLANGE, BLANK FLANGE, BL FLANGE RAISED FACE, CLASS 900, 900LBS, 900#, 1/2" - 48", ASTM A105.
5) BLIND FLANGE RF, BLRF FLANGE, BLANK FLANGE, BL FLANGE RAISED FACE, CLASS 1500, 1500LBS, 1500#, 1/2" - 48", ASTM A105.
6) BLIND FLANGE RF, BLRF FLANGE, BLANK FLANGE, BL FLANGE RAISED FACE, CLASS 2500, 2500LBS, 2500#, 1/2" - 48", ASTM A105.
Material
1) ASTM A105, A105N
Surface Antirust:
Surface antirust 1: Antirust light oil
Surface antirust 2: Black paint coating
Surface antirust 3: Yellow paint coating or Red paint coating
Surface antirust 4: Galnavized (Hot galvanized or Cold galvanized or Electro Galvanized)
Surface Finish:
Surface finish 1: Stock finish
Surface finish 2: Sprial serrated
Surface finish 3: Two or three grooves (Water Lines)
Surface finish 4: Smooth finish
Blind Flange Dimensions & Tolerances
| Class | 150 | 300 | 400 | 600 | 900 | 1500 | 2500 |
| Diameter - D | 90 | 95 | 95 | 95 | 120 | 120 | 135 |
| Height - B | 9.6 | 12.7 | 14.3 | 14.3 | 22.3 | 22.3 | 30.2 |
| 11.2 | 14.3 | 20.7 | 20.7 | 28.7 | 28.7 | 36.6 | |
| Diameter - G | 35.1 | 35.1 | 35.1 | 35.1 | 35.1 | 35.1 | 35.1 |
| Diameter - K | 60.3 | 66.7 | 66.7 | 66.7 | 82.6 | 82.6 | 88.9 |
| Bolt Holes | 4 | 4 | 4 | 4 | 4 | 4 | 4 |
| Diameter - L | 15.9 | 15.9 | 15.9 | 15.9 | 22.2 | 22.2 | 22.2 |
| Stud Bolts Diameter x Length | |||||||
| Diameter (in) | 1/2 | 1/2 | 1/2 | 1/2 | 3/4 | 3/4 | 3/4 |
| Length (mm) | 55 | 65 | 75 | 75 | 110 | 110 | 120 |
| NPS | 1/2 | 3/4 | 1 | 1¼ | 1½ | 2 | 2½ | 3 | 3½ | 4 | 6 | 8 | 10 | 12 | 14 | 16 | 18 | 20 | 24 |
--------------------------------------------------------------------------------- > NPS <------------------------------------------------------------------------------
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).
Blind Flanges Product Range
Range
½" (15 NB) to 48" (1200NB) in 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
Stainless Steel Blind Flanges
Grade : 304, 304L, 304H, 309, 310, 310S, 316, 316Ti, 316 L, 317, 317L, 321, 347, 347 H, 409, 410, 410S, 420, 430L
Duplex Steel Blind Flanges
Grade : 2205 (UNS No. S31803), 2507 (UNS No. S32750)
Nickel Alloy Blind Flanges
Grade : Nickel 200 (UNS No. N02200), Nickel 201 (UNS No. N02201), Monel 400 (UNS No. N04400), Monel 500 (UNS No. N05500), Inconel 800 (UNS No. N08800), Inconel 825 (UNS No. N08825), Inconel 600 (UNS No. N06600), Inconel 625 (UNS No. N06625), Inconel 601 (UNS No. N06601), Hastelloy C 276 (UNS No. N10276), Alloy 20 (UNS No. N08020), Titanium (Grade I & II)
Copper Alloy Blind Flanges
Grade : UNS No. C 10100, 10200, 10300, 10800, 12000, 12200, 70600, 71500, UNS No. C 70600 (Cu -Ni- 90/10), C 71500 (Cu -Ni- 70/30)
Blind Flanges Standard
- ANSI : ANSI B16.5, ANSI B16.47, MSS SP44, ANSI B16.36, ANSI B16.48
- DIN : DIN2527, DIN2566, DIN2573, DIN2576, DIN2641, DIN2642, DIN2655, DIN2656, DIN2627, DIN2628, DIN2629, DIN 2631, DIN2632, DIN2633, DIN2634, DIN2635, DIN2636, DIN2637, DIN2638, DIN2673
- B.S : BS4504, BS4504, BS1560, BS10
- OTHER : PLATE, PLATE BLANK
Value Added Services for Blind Flanges
- HOT DIPPED GALVANIZING
- HEAT TREATMENT
- CNC MACHINING
- THREADING
Blind Flange Packaging & Marking
Blind Flange are individually wrapped by hand to ensure that the high quality of the material is maintained and no damage in the last stages of production. We recommend Plywood cases or pallet packaging to ensure safe packaging and prompt delivery of the ordered consignment.
Blind Flange come with imprints relevant to the job information (eg, heat number, size, material and part number). This information is also printed along all delivered Blind Flange.
Pressure class of Blind Flange
- 150 Lbs Blind Flange
- 300 Lbs Blind Flange
- 400 Lbs Blind Flange
- 600 Lbs Blind Flange
- 900 Lbs Blind Flange
- 1500 Lbs Blind Flange
- 2500 Lbs Blind Flange
Blind Flange Price
ASME B16.5 Welding Neck Flange
FOB Price: US $1-2000 / Ton
ANSI Class150 4" Welding Neck Flange
FOB Price: US $700-1400 / Ton
Forged F304 B16.5 150LBS Slip On Flange
FOB Price: US $0.1-266 / Piece
Flange f304 a105 rf/ff slip on flange pn16 150ib
FOB Price: US $600-8000 / Ton
bs4504 pn16 socket welding flange high quality
FOB Price: US $1100.00-1450.00 / Ton
150lb socket welding stainless flanges F316
FOB Price: US $0.12-150 / Piece
lap joint flange a105
FOB Price: US $1000-2500 / Ton
ansi b16.5 class 150 lap joint flange
FOB Price: US $1-500 / Piece
ANSI Class150 Threaded Flange
FOB Price: US $700-1400 / Ton
threaded flange
FOB Price: US $1-5000 / Piece
EN1092 Forged Steel Blind Flange
FOB Price: US $1000-1200 / Ton
stainless steel pn10 blind flange
FOB Price: US $1-2000 / Piece
spectacle blind B16.48/API590
FOB Price: US $1-5000 / Piece
square flange
FOB Price: US $1000-2500 / Ton
Blind Flange Inventory
ASME / ANSI B16.5 / ASME B16.47 Flange- Download PDF
Available materials for Flange
Flange Inventory
| Stainless Steel | Nickel Alloys | Carbon Steel & Alloy Steel |
|---|---|---|
Stainless Steel Flange |
High Nickel Alloy Flange |
|
Products
- Welding Neck Flange +
- Slip On Flange
- Socket Weld Flange
- Lap Joint Flange
- Threaded Flange
- Blind Flange
ANSI ASME B16.47 Ser.A
» 150lb Ser.A (MSS SP44) BL
» 300lb Ser.A (MSS SP44) BL
» 600lb Ser.A (MSS SP44) BL
» 900lb Ser.A (MSS SP44) BL
ANSI ASME B16.47 Ser.B
» 75lb Ser.B (API)BL Flange
» 150lb Ser.B (API)BL Flange
» 300lb Ser.B (API)BL Flange
» 600lb Ser.B (API)BL Flange
» 900lb Ser.B (API)BL Flange - Spectacle Blinds
- Spades and Ring Spacers
- Square Flange
- Special Flanges +
- Flange Faces +
- Flange Pressure Class +
Available Materials
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