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Blind Flange
Description
Blind Flange is also called BL flange. There is no hole in the center, and the function is to close or isolate the pipeline. Mainly used for pipe ends or as heads. Blind flange can be used in an existing operation flow, or for future expansion requirements. It also permits easy access to the interior of a line or vessel, once it has been sealed and must be reopened. RF blind flange normally use for PN0.25 to PN25.0, RTJ blind flange normally use for high pressure pipeline which from PN6.3 to PN25.0;
As the professional blind flange, we can also produce the special size blind flange according to customers’ drawings or designs.
Description of blind flange as below:
1. Blind Flange Size: 1/2″-60″(DN10-DN1500)
2. Blind Flange Pressure Rating:
ANSI B16.5: Class 150 Flanges-Class 2500 Flanges;
DIN: 6Bar 10Bar 16Bar 25Bar 40Bar 63Bar
JIS: 5K Flanges-30K Flanges
EN1092-1: 6Bar 10Bar 16Bar 25Bar 40Bar 63Bar 100Bar
3. Blind Flange Material:
Carbon steel: ASTM A105/SA105N; ASTM A350 LF1; LF2; CL1/CL2, CT20;16MN;RST37.2;S235JR;P245GH;P250GH;P250GHM; C22.8;Q235;15CrMo
Stainless steel: ASTM A182, SS303; SS304/304L; SS316/316L; F321; F347; 316Ti; A182F317/317L; SS400;SF440
Alloy Steel:ASTM A182 A182 F12,F11,F22,F5,F9,F91,F51,F53,F55,F60,F44,F304H,F316H,F317H,F321H,F347H,INCONEL 600,625,825,etc.
4. Blind Flange Surface treatment: Anti-rust oil, black / yellow / transparent / electric galvanized / hot galvanized.
5. Blind Flange Sealing Surface: FF, RF, MFM, TG, FF
6. Blind Flange Standard:
- ANSI B16.5, A105 150LB / 300LB / 600LB / 900LB / 1500LB / 2500LB
- DIN 2573 PN6 / DIN 2576 PN10 / DIN2502 PN16 / DIN2503 P25-40 / DIN2566 PN16 / DIN2631-2635 RST37.2 OR C22.8
- JIS SS400 OR SF440 5K / 10K / 16K / 20K / 30K
- UNI 2276 / 2277 / 2278 / 6084 / 6089 / 6090 / 2544 / 2282 / 6091-6093
- EN1092 PN6 / PN10 / PN16 / PN25 / PN40 / TYPE1 TYPE2 TYPE 5 TYPE 12 TYPE 13
- BS4504 SANI1123 1000/3, 1600/3, 2500/3, T/D, T/E, T/F carbon steel flange
- AS2129 TABLE D / TABLE H / TABLE E carbon steel flange
- GOST 12820-80 / 12821-80 carbon steel flange
7. Blind Flange Tolerance: according to the standard.
8. Blind Flange Package: Plywood pallet or case.
9. Blind Flange Delivery time: At the earliest ,within the period required by customer.