PLSteel Pipe FlangesPlate Flange (PL)
Flat-type flange with simple structure, light weight and low cost — ideal for low-pressure pipeline systems.
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Blind Flange (BL)
Solid disc flange to seal pipeline ends — reliable isolation for maintenance, testing and termination.
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BLSteel Pipe Flanges
Overview
Blind Flange (BL) is a flange with a solid disc structure, used to seal the end of the pipeline, prevent medium leakage and protect internal pipeline structure. Connected by bolting with simple structure, reliable sealing and strong pressure resistance — essential for temporary or permanent pipeline isolation.
Size Range
½" – 80"
Pressure Class
Class 150 – 2500 / PN10 – PN100
Key Features
- Solid disc for positive shut-off
- RF, FF, RTJ and MFM facing options
- Rated for full line pressure class
- Custom bore and tap options available
- Thick disc design for high pressure
Benefits
- Positive isolation superior to line blinds in many cases
- Same pressure rating as line flanges
- Easy removal for system access
Specifications
| Standards | GB/T 9113, ASME B16.5, EN 1092-1 |
| Pressure Ratings | Class 150 – 2500 / PN10 – PN100 |
| Nominal Diameter | DN15 – DN2000 (NPS ½" – 80") |
| Working Temperature | -40°C – 600°C |
| Sealing Surface | RF, FF, RTJ, MFM |
Applications
Pipeline termination and isolationPressure vessel nozzlesHydrostatic test endpointsMaintenance and turnaround isolation
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Standards
- • ISO 7005
- • ASME B16.5
- • EN 1092-1
- • DIN 2501
- • JIS B2220
- • GB/T 9115–9119
- • HG/T 20592
Materials
- • Carbon Steel: A105, 20#, Q235B, A234 WPB
- • Stainless Steel: 304, 304L, 316, 316L, 321
- • Alloy Steel: 16Mn, F11, F22, 15CrMo
- • Duplex & Super Duplex: F51, F53, 2205
- • Special alloys: Monel, Hastelloy, Titanium (on request)
Related Products
PLSteel Pipe Flanges
SOSteel Pipe FlangesSlip-On Flange (SO)
Sleeve-type flange slipped over the pipe and fixed by fillet welding — economical for medium and low pressure systems.
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LJSteel Pipe FlangesLap Joint Flange (LJ)
Loose flange with stub end — convenient disassembly for large-diameter, low and medium pressure systems.
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