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Insulation Gasket China Manufacturer
QS Gasket: Insulation Gasket China Manufacturer
Product: Insulation Gasket China Manufacturer
Diameter : 8 Inch
Gasket: G10 and SS316
Seal: PTFE
Class: 300LB
Sleeve: G10
Washer: G10 and ZPS
Type: F
Application: Design for ASME B16.5 Flange
Diameter : 8 Inch
Gasket: G10 and SS316
Seal: PTFE
Class: 300LB
Sleeve: G10
Washer: G10 and ZPS
Type: F
Application: Design for ASME B16.5 Flange
Quantity
When specifying critical bolted connections for ASME B16.5 flanges, the combination of electrical isolation, mechanical integrity, and corrosion resistance is non‑negotiable. Our 8‑inch Class 300LB Insulation Gasket kit – featuring a G10 rigid laminate body, SS316 metallic reinforcements, a PTFE sealing element, and Type‑F washers in both G10 and ZPS – delivers exactly that balance. As a dedicated China Manufacturer with over a decade of compounding high‑pressure laminates and precision metal parts, we engineer this gasket to outperform generic alternatives in the most demanding service environments.
Construction & Material Rationale
The core insulator and sleeve are manufactured from G10 (glass‑reinforced epoxy), a thermoset laminate with exceptional compressive strength (>60 ksi) and continuous operating temperature up to 180°C. The PTFE seal provides a low‑friction, chemically inert barrier that maintains leak‑tight performance even under thermal cycling. Stainless steel 316 rings add creep‑relief and flange protection, while the Type‑F washer set – G10 on the live side and ZPS (zinc‑plated steel) on the nut side – ensures uniform load distribution and prevents galvanic coupling between dissimilar flange materials. Every component is dimensionally verified to ASME B16.5 bolt‑hole patterns and thickness tolerances.
The core insulator and sleeve are manufactured from G10 (glass‑reinforced epoxy), a thermoset laminate with exceptional compressive strength (>60 ksi) and continuous operating temperature up to 180°C. The PTFE seal provides a low‑friction, chemically inert barrier that maintains leak‑tight performance even under thermal cycling. Stainless steel 316 rings add creep‑relief and flange protection, while the Type‑F washer set – G10 on the live side and ZPS (zinc‑plated steel) on the nut side – ensures uniform load distribution and prevents galvanic coupling between dissimilar flange materials. Every component is dimensionally verified to ASME B16.5 bolt‑hole patterns and thickness tolerances.
Key Performance Attributes
- Electrical isolation: Volume resistivity >10⁶ MΩ·cm, effectively interrupting stray currents and mitigating galvanic corrosion in mixed‑metal piping systems.
- Mechanical robustness: Withstands hydrostatic test pressures up to 1.5× rating without creep relaxation or extrusion.
- Chemical & thermal stability: Resists hydrocarbons, dilute acids, alkalis, and steam; PTFE seal remains compliant from –40°F to 400°F.
- Fire‑safe compliance: G10 is self‑extinguishing (UL 94 V‑0) and retains structural integrity during short‑term flame exposure.
- Electrical isolation: Volume resistivity >10⁶ MΩ·cm, effectively interrupting stray currents and mitigating galvanic corrosion in mixed‑metal piping systems.
- Mechanical robustness: Withstands hydrostatic test pressures up to 1.5× rating without creep relaxation or extrusion.
- Chemical & thermal stability: Resists hydrocarbons, dilute acids, alkalis, and steam; PTFE seal remains compliant from –40°F to 400°F.
- Fire‑safe compliance: G10 is self‑extinguishing (UL 94 V‑0) and retains structural integrity during short‑term flame exposure.
Typical Application Scenarios
- Oil & gas platforms: Isolation of cathodically protected subsea risers and topside piping where flange bolt corrosion costs millions in downtime.
- Chemical processing plants: Separation of reactive media from carbon steel flanges, especially in HCl and caustic service.
- Power generation: Turbine lube‑oil systems and cooling water circuits where earth‑fault protection is mandatory.
- Renewable energy – wind turbine towers: Internal grounding systems and gearbox oil‑cooling loops benefit from the G10 sleeve’s dielectric strength and the SS316’s resistance to saline coastal atmospheres.
- Marine & shipbuilding: Propulsion shaft grounding and ballast water piping, where moisture‑induced tracking is a chronic issue.
- Oil & gas platforms: Isolation of cathodically protected subsea risers and topside piping where flange bolt corrosion costs millions in downtime.
- Chemical processing plants: Separation of reactive media from carbon steel flanges, especially in HCl and caustic service.
- Power generation: Turbine lube‑oil systems and cooling water circuits where earth‑fault protection is mandatory.
- Renewable energy – wind turbine towers: Internal grounding systems and gearbox oil‑cooling loops benefit from the G10 sleeve’s dielectric strength and the SS316’s resistance to saline coastal atmospheres.
- Marine & shipbuilding: Propulsion shaft grounding and ballast water piping, where moisture‑induced tracking is a chronic issue.
Why This Insulation Gasket Stands Out
Unlike multi‑piece field‑assembled kits, our unitized design reduces installation errors and torque‑loss risks. The ZPS washer’s controlled hardness (200–240 HB) prevents galling on stainless studs, while the G10 washer acts as a sacrificial insulator should over‑torquing occur. Every batch is traceable with material test reports (MTRs) and dimensional inspection records – a standard we uphold as a responsible China Manufacturer serving global EPC contractors.
Unlike multi‑piece field‑assembled kits, our unitized design reduces installation errors and torque‑loss risks. The ZPS washer’s controlled hardness (200–240 HB) prevents galling on stainless studs, while the G10 washer acts as a sacrificial insulator should over‑torquing occur. Every batch is traceable with material test reports (MTRs) and dimensional inspection records – a standard we uphold as a responsible China Manufacturer serving global EPC contractors.
Quality Assurance & Packaging
All gaskets are 100% visual and dimensional inspected; PTFE seals are helium‑leak tested to <1×10⁻⁵ std cm³/s. Anticorrosive oil is applied to SS316 parts, and each kit is vacuum‑sealed with desiccant, ready for offshore or desert storage.
All gaskets are 100% visual and dimensional inspected; PTFE seals are helium‑leak tested to <1×10⁻⁵ std cm³/s. Anticorrosive oil is applied to SS316 parts, and each kit is vacuum‑sealed with desiccant, ready for offshore or desert storage.
Summary
This 8"Class 300 Type‑F Insulation Gasket merges the dielectric excellence of G10, the sealing reliability of PTFE, and the mechanical strength of SS316 into one pre‑engineered solution. Whether your challenge is stray‑current corrosion in a refinery, earth‑loop protection in a substation, or flange integrity on a floating production vessel, this product reduces lifecycle costs and unscheduled maintenance. Backed by rigorous quality control and responsive technical support from our facility, it offers the performance consistency that major projects demand – straight from a trusted China Manufacturer with global shipping capabilities.
This 8"Class 300 Type‑F Insulation Gasket merges the dielectric excellence of G10, the sealing reliability of PTFE, and the mechanical strength of SS316 into one pre‑engineered solution. Whether your challenge is stray‑current corrosion in a refinery, earth‑loop protection in a substation, or flange integrity on a floating production vessel, this product reduces lifecycle costs and unscheduled maintenance. Backed by rigorous quality control and responsive technical support from our facility, it offers the performance consistency that major projects demand – straight from a trusted China Manufacturer with global shipping capabilities.
For flange isolation that truly lasts, choose the gasket designed not just to fit, but to function – under pressure, heat, and every electrical fault you need to block.
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