BL Blind Flanges

1.What are blind Flanges?

Blind Flanges are mostly used to seal the end or opening of a pipe, which is why they come without a bore. This comes in handy for inspection and pressure tests, as it allows quick access to the pipe.

Various high quality Blind Pipe Flanges in all shapes and sizes and with any specifications (ANSI B16.5/ASME B16.47 and DIN standards) , as well as in all steel materials including carbon steel blind flanges, stainless steel blind flanges and alloy blind flanges.

Outstanding quality Blind Flanges at very competitive prices from DLFT CO.,LTD. 

OEM/ODM order for blind flanges in various dimensions and materials as per the specifications provided by our clients, meeting international standards.

ANSI B16.5 blind flanges, ASME B16.47 blind flanges can be shipped on-time from DLFT CO.,LTD.
Top Quality Blind Flanges At Competitive Price From DLFT

BLIND FLANGES

black painted blind flange

2.Standard Specification For Blind Flanges

Dimensions : ANSI ASME B16.5, ANSI ASME B16.47 Series A & B, MSS SP44, ASA, API-605, AWWA, Custom Drawings
ASME Size : 1/2"  to 48"
DIN:DN15 TO DN1200
EN 1092-1
DIN : DIN2527, DIN2566, DIN2573, DIN2576, DIN2641, DIN2642, DIN2655, DIN2656, DIN2627, DIN2628, DIN2629, DIN 2631, DIN2632, DIN2633, DIN2634, DIN2635, DIN2636,DIN2637, DIN2638, DIN2673
BS : BS4504 , BS1560, BS10
JIS B2220
KS B 6216 

3.Surface Treatment: Anti-rust Oil, Transparent/Black Anti-rust Paint/Hot dipped Galvanized.

4.Blind Flange Pressure Grade

ANSI Class : 150 LBS, 300 LBS, 600 LBS, 900 LBS, 1500 LBS, 2500 LBS,
DIN Standard PN2.5-6,10, 16, 25, 40,63,100,160,250,320,400. Etc.
JIS B2220：5K、10K、16K、20K、30K、40K、63K

5.Blind Flange Materials

Carbon Steels:A516 Gr.70 ANTI-HIC, A694 F52 / F60 / F65 / F70, A105, SA-266M, 20#, 16Mn, 16MnHIC, 20#HIC, and equivalents.

Alloy Steels:SA182-F11, SA182-F22, 15CrMo, 20MnMoNb, 25Cr2MoVA, 14Cr1Mo, 12Cr2Mo1, 08Cr2AlMo, 12Cr5Mo, 38CrMoAl, 20MnNiMo, SA-508 Gr.3, and equivalents.

Low-Temperature Steels:SA350 LF1 / LF2 / LF3, 09MnNiD, 16MnD, 20MnMoD, 08Ni3D, 10NiMoVD, and equivalents.

Stainless Steels:F304 / 304L / 304H (1.4306), F316 / 316L / 316H (1.4404), F321 (1.4541), 316Ti (1.4571), F347 / F347H (1.4550), F317 (1.4449), F310 (1.4845), F904L (S39042 / 1.4539), X2CrNiMo25-22-2, SA-182M F310MoLN, A182 F6NM, A182 F6a, and equivalents.

Duplex & Super Duplex Stainless Steels:S31803 (2205), F51 (S22253), F60 (S22053 / 2205), F53 (S25073 / 2207), and equivalents.

Specialty Alloys & Nickel Alloys:SB462-N08020, Incoloy 800, UNS N08020, B564 UNS N10276, UNS N08367, NS1403, and equivalents.

6.Sealing Surface Types For Bind Flanges

RF (Raised Face);                                  EN 1092-1 Type B
FF (Flat Face);                                       EN 1092-1 Type A
M&F (Male-and-Female Face);             EN 1092-1 Type C
RTJ (Ring-Type Joint)                           EN 1092-1  Type E
F (Female Face);
M (Male Face);
T&G (Tongue and Groove Face);          EN 1092-1Type D
Among them, the uneven surface (MFM) is a matching use; 

Blind flange face type

FLANGE SEALING FACE TYPES

RTJ RING TYPE JOINT FLANGE

7.Blind Pipe Flange Application

Chemical, Engineering, Construction, Oil Field, Offshore, Water System, Shipbuilding, Natural Gas, Electric Power, Manufacturing Industry, Pipe Projects etc.

Related Reading:

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SW SOCKET WELD FLANGES

BL BLIND FLANGES

LJ LAP JOINT FLANGES

LWN LONG WELD NECK FLANGES

SPECTACLE BLIND FLANGES

REDUCING FLANGES AND EXPANDER FLANGES