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Zhejiang RTJ Insulation Gasket Kits
QS Gasket: Zhejiang RTJ Insulation Gasket Kits
Product: Zhejiang RTJ Insulation Gasket Kits
Design: For RTJ Flange
Gasket : G11 + SS316 core
Sleeves: G11
Size: DN300
Class: 600LB
Seal: PTFE Spring-energized
Washer Isolating: G10
Steel Washer: Zinc-plated
Type : F
Design: For RTJ Flange
Gasket : G11 + SS316 core
Sleeves: G11
Size: DN300
Class: 600LB
Seal: PTFE Spring-energized
Washer Isolating: G10
Steel Washer: Zinc-plated
Type : F
Quantity
Qishine’s RTJ Insulation Gasket Kits are precision-engineered for critical Ring Type Joint (RTJ) flange connections in demanding industrial environments. Designed to deliver robust electrical isolation, corrosion resistance, and pressure retention, these kits are the preferred choice for cathodic protection systems, pipeline isolation joints, and flange insulation in oil & gas, petrochemical, power generation, and subsea applications. Each kit is manufactured in Zhejiang to stringent quality standards, ensuring consistent performance in Class 600LB systems up to DN300.
Key Design Features
At the core of our RTJ Insulation Gasket Kits lies a solid SS316 metal core. This austenitic stainless steel offers exceptional resistance to pitting, crevice corrosion, and chloride attack, making it ideal for offshore, sour service (NACE), and high-temperature environments. The SS316 core is fully encapsulated or faced with high-performance G11 composite sleeves. G11 is a glass-reinforced epoxy laminate that provides outstanding dielectric strength (>15 kV/mm), high compressive creep resistance, and thermal stability up to 180°C continuously. This combination ensures that the gasket maintains both sealing integrity and electrical isolation under fluctuating pressure and thermal cycling.
At the core of our RTJ Insulation Gasket Kits lies a solid SS316 metal core. This austenitic stainless steel offers exceptional resistance to pitting, crevice corrosion, and chloride attack, making it ideal for offshore, sour service (NACE), and high-temperature environments. The SS316 core is fully encapsulated or faced with high-performance G11 composite sleeves. G11 is a glass-reinforced epoxy laminate that provides outstanding dielectric strength (>15 kV/mm), high compressive creep resistance, and thermal stability up to 180°C continuously. This combination ensures that the gasket maintains both sealing integrity and electrical isolation under fluctuating pressure and thermal cycling.
Complete Kit Components
Each RTJ Insulation Gasket Kit is supplied as a fully matched assembly (Type F configuration) including:
- G11 + SS316 core gasket – precision-machined to RTJ groove dimensions.
- G11 insulating sleeves – for bolt-hole isolation, preventing electrical bridging through studs.
- G10 isolating washers – high-strength glass-epoxy washers under the nut face.
- Zinc-plated steel washers – to distribute load and protect the G10 washers from galling.
- PTFE spring-energized seal – integrated into the gasket profile to provide low-leakage sealing (≤1×10⁻⁶ mbar·L/s) even at low bolt loads, with chemical compatibility across hydrocarbons, H₂S, steam, and mild acids.
Each RTJ Insulation Gasket Kit is supplied as a fully matched assembly (Type F configuration) including:
- G11 + SS316 core gasket – precision-machined to RTJ groove dimensions.
- G11 insulating sleeves – for bolt-hole isolation, preventing electrical bridging through studs.
- G10 isolating washers – high-strength glass-epoxy washers under the nut face.
- Zinc-plated steel washers – to distribute load and protect the G10 washers from galling.
- PTFE spring-energized seal – integrated into the gasket profile to provide low-leakage sealing (≤1×10⁻⁶ mbar·L/s) even at low bolt loads, with chemical compatibility across hydrocarbons, H₂S, steam, and mild acids.
Applications & Performance
These RTJ Insulation Gasket Kits are specifically suited for:
- Offshore platforms and FPSO riser isolation.
- Compressor and pump station flange connections where stray current mitigation is required.
- Heat exchanger and valve isolation in refinery units.
- Subsea pipeline end terminations (PLETs) requiring long-term galvanic protection.
These RTJ Insulation Gasket Kits are specifically suited for:
- Offshore platforms and FPSO riser isolation.
- Compressor and pump station flange connections where stray current mitigation is required.
- Heat exchanger and valve isolation in refinery units.
- Subsea pipeline end terminations (PLETs) requiring long-term galvanic protection.
The SS316 core resists oxidation up to 870°C, while the G11/G10 insulation system maintains >10 MΩ resistance at 500V DC after accelerated aging tests. The PTFE spring-energized seal accommodates flange movement, thermal expansion, and vibration, reducing maintenance intervals by up to 40% compared to conventional soft iron RTJ gaskets.
Quality Assurance
Every batch of RTJ Insulation Gasket Kits undergoes dimensional verification, hardness testing (per ASTM E18), dielectric strength validation, and nitrogen leak testing at 1.5x rated pressure. Kits are traceable with material test reports (MTR) per EN 10204 3.1. For critical services, optional NACE MR0175 compliance and third-party inspection are available.
Every batch of RTJ Insulation Gasket Kits undergoes dimensional verification, hardness testing (per ASTM E18), dielectric strength validation, and nitrogen leak testing at 1.5x rated pressure. Kits are traceable with material test reports (MTR) per EN 10204 3.1. For critical services, optional NACE MR0175 compliance and third-party inspection are available.
Ordering Information
Size: DN300 | Class: 600LB | Type: F | Core: SS316 | Insulation: G11/G10 | Seal: PTFE Spring-energized. Custom sizes, higher pressure classes (up to 2500LB), and alternative core materials (Inconel, Hastelloy) are available upon request.
Size: DN300 | Class: 600LB | Type: F | Core: SS316 | Insulation: G11/G10 | Seal: PTFE Spring-energized. Custom sizes, higher pressure classes (up to 2500LB), and alternative core materials (Inconel, Hastelloy) are available upon request.
Choose Qishine’s RTJ Insulation Gasket Kits for reliable isolation, leak-tight sealing, and extended service life in your most challenging flange connections. Contact our engineering team for application-specific torque recommendations and installation guidelines.
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