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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Ring Type Joint Flange (RTJ)
HPHT flange with metal ring gasket groove — superior metal-to-metal seal for extreme pressure and temperature.
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RTJSteel Pipe Flanges
Overview
A Ring Type Joint (RTJ) Flange is a heavy-duty flange engineered for extreme high-pressure and high-temperature (HPHT) service. It features a precision-machined groove that holds a solid metal ring gasket (octagonal or oval) to create a superior, pressure-energized, leak-proof metal-to-metal seal.
Size Range
½" – 48"
Pressure Class
Class 600 – 2500 / PN100 – PN420
Key Features
- Metal-to-metal seal with ring gasket
- Pressure-energized sealing as pressure increases
- Style R, RX and BX gasket options
- Weld neck and blind configurations
- Primary choice for Class 600 and above
Benefits
- Most reliable seal for HPHT conditions
- Metal gasket resists heat and chemical degradation
- Critical for safety-sensitive systems
Specifications
| Standards | ASME B16.5, ASME B16.47, API 6A |
| Pressure Ratings | Class 600 – 2500 / PN100 – PN420 |
| Gasket Styles | Style R (Octagonal/Oval), RX, BX |
| Temperature | Typically above 427°C (800°F) service |
| Configurations | Weld Neck, Blind, Socket Weld |
Applications
Oil and gas wellhead equipmentOffshore high-pressure pipelinesPetrochemical reactors and steam linesPower plant boiler circuits
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Standards
- • ASME B16.5
- • ASME B16.47
- • API 6A
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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