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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Threaded Flange (TH)
NPT/BSP threaded bore flange — no welding required, ideal for low-pressure, frequently serviced lines.
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THSteel Pipe Flanges
Overview
Threaded Flange (TH) connects to pipe by thread without welding, which is convenient for disassembly and maintenance. It features simple structure, quick installation, no pipe damage during installation, and is suitable for low-pressure, small-diameter pipeline systems and scenarios requiring frequent disassembly.
Size Range
½" – 4"
Pressure Class
Class 150 – 300 / PN10 – PN25
Key Features
- No welding required — threaded connection
- Quick disassembly for maintenance
- NPT, BSP and metric thread options
- Lightweight for small-diameter systems
- FF and RF sealing surfaces
Benefits
- No hot work permit required for installation
- Reusable connection for maintenance cycles
- Compatible with threaded pipe systems
Specifications
| Standards | GB/T 9114, ASME B16.5, EN 1092-1, DIN 2501 |
| Pressure Ratings | Class 150, 300 / PN10, PN16, PN25 |
| Nominal Diameter | DN15 – DN100 (NPS ½" – 4") |
| Thread Type | NPT, BSP, G (metric) |
| Working Temperature | -20°C – 300°C |
Applications
Water supply and drainageHVAC and gas distributionLow-pressure chemical linesPharmaceutical and food processing
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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)
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Sleeve-type flange slipped over the pipe and fixed by fillet welding — economical for medium and low pressure systems.
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Loose flange with stub end — convenient disassembly for large-diameter, low and medium pressure systems.
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