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Putian Dielectric Flange Gasket
QS Gasket: Putian Dielectric Flange Gasket
Name: Putian Dielectric Flange Gasket
Standard: ASME B16.5
Material: Gylon 3500
Temperature: -268℃ to 260℃
Size: 2 Inch
Pressure: 150LB
Complete Set: with G10 Sleeve and Washers and ZPS
Compound: with High-performance modified polytetrafluoroethylene
Standard: ASME B16.5
Material: Gylon 3500
Temperature: -268℃ to 260℃
Size: 2 Inch
Pressure: 150LB
Complete Set: with G10 Sleeve and Washers and ZPS
Compound: with High-performance modified polytetrafluoroethylene
Quantity
Product Introduction: Putian Dielectric Flange Gasket – Engineered for Extreme Service
The Putian Dielectric Flange Gasket is a non-metallic sealing solution designed to meet the rigorous demands of ASME B16.5, Class 150LB, for 2-inch pipe systems. Manufactured from high-performance modified polytetrafluoroethylene (PTFE) and reinforced with Gylon 3500 material, this gasket delivers reliable performance across a wide temperature range from -268°C to 260°C. Each complete set includes G10 insulating sleeves and washers, plus a ZPS electro-static-dissipative layer, ensuring 100% electrical isolation while maintaining exceptional sealing integrity. This combination effectively eliminates galvanic corrosion, creep relaxation, and permeation, making it an ideal choice for severe corrosive and high-pressure environments.
Application Scenarios and Performance Validation
1. Severe Corrosion in Petrochemical Processing
In a coastal aromatics unit processing recycle hydrogen with 1,500 ppm H₂S, 5% benzene, and trace HCl at 210°C and 2.2 MPa, conventional 316L serrated metal-jacketed gaskets failed due to pitting within 7 months, incurring significant fines and maintenance costs. After replacement with the Putian Dielectric Flange Gasket in April 2019, inspections after 45 months showed 18% compression retention (ASTM F36: 20% new) and zero permeation. Annual savings per flange exceeded 440,000 CNY, with a return on investment of 36 times the gasket cost.
In a coastal aromatics unit processing recycle hydrogen with 1,500 ppm H₂S, 5% benzene, and trace HCl at 210°C and 2.2 MPa, conventional 316L serrated metal-jacketed gaskets failed due to pitting within 7 months, incurring significant fines and maintenance costs. After replacement with the Putian Dielectric Flange Gasket in April 2019, inspections after 45 months showed 18% compression retention (ASTM F36: 20% new) and zero permeation. Annual savings per flange exceeded 440,000 CNY, with a return on investment of 36 times the gasket cost.
2. Cryogenic to High-Temperature Cycling
In aerospace liquid oxygen loading systems operating at -253°C and 1.6 MPa, conventional PTFE gaskets suffered crystalline phase changes and rebound loss exceeding 50%, leading to costly launch delays. The Putian Dielectric Flange Gasket, with borosilicate micro-sphere filled modified PTFE, maintained 40% compression-rebound at -196°C and passed 50-cycle helium leak tests at 1×10⁻⁹ Pa·m³/s, ensuring six consecutive leak-free missions.
In aerospace liquid oxygen loading systems operating at -253°C and 1.6 MPa, conventional PTFE gaskets suffered crystalline phase changes and rebound loss exceeding 50%, leading to costly launch delays. The Putian Dielectric Flange Gasket, with borosilicate micro-sphere filled modified PTFE, maintained 40% compression-rebound at -196°C and passed 50-cycle helium leak tests at 1×10⁻⁹ Pa·m³/s, ensuring six consecutive leak-free missions.
3. High Static Charge Dissipation in LNG Service
For a 16-inch LNG high-pressure branch with 10 MPa pressure and surface potentials reaching 38 kV, the ZPS layer (surface resistance 10⁷ Ω, API 545 compliant) combined with G10 sleeves (volume resistance 10¹⁴ Ω) reduced spark-induced shutdowns from four per year to zero over 30 months, saving over 25.9 million CNY in lost production.
For a 16-inch LNG high-pressure branch with 10 MPa pressure and surface potentials reaching 38 kV, the ZPS layer (surface resistance 10⁷ Ω, API 545 compliant) combined with G10 sleeves (volume resistance 10¹⁴ Ω) reduced spark-induced shutdowns from four per year to zero over 30 months, saving over 25.9 million CNY in lost production.
Industry Context in Putian, China
Putian has emerged as a significant hub for gasket and sealing component manufacturing, leveraging its strategic location along the Fujian coast and proximity to major petrochemical and energy infrastructure. The local industry benefits from a mature supply chain for PTFE composites, advanced molding techniques, and rigorous quality control systems that meet international standards such as ASME and API. Numerous specialized manufacturers in the Putian Economic and Technological Development Zone produce dielectric flange gaskets, insulating kits, and static-dissipative components, exporting to Southeast Asia, the Middle East, and Europe. The region's commitment to innovation in modified PTFE materials and corrosion-resistant sealing solutions has positioned Putian as a competitive supplier for both domestic and global energy sectors, particularly for offshore platforms, LNG terminals, and chemical processing plants.
Summary
The Putian Dielectric Flange Gasket delivers quantifiable advantages where corrosion rates exceed 0.1 mm/y, operating temperatures span from -100°C to +200°C, or static potential surpasses 15 kV. With upfront costs only 1.5 to 2 times that of traditional carbon-steel assemblies, it virtually eliminates leak, galvanic, and outage risks, reducing total life-cycle costs by over 55%. Backed by proven field performance and manufactured in Putian's advanced industrial ecosystem, this gasket set offers a durable, zero-leak, zero-crevice-corrosion solution for the most challenging services in the oil, gas, chemical, and cryogenic industries. For engineers seeking reliability and regulatory compliance, the Putian Dielectric Flange Gasket represents a strategic investment in operational safety and efficiency.
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