Flange Insulation Gasket Kits Manufacturer & Supplier in China

CATHODIC PROTECTION · DIELECTRIC ISOLATION

Complete Cathodic Protection & Dielectric Isolation Solutions for Oil, Gas & Chemical Piping

Complete flange isolation kits for oil, gas, water, refinery and chemical piping — including the insulation gasket, G10/G11 sleeves, insulating washers and steel washers. Available in Type D, Type E, Type F, and high-pressure SS core versions up to ANSI 2500# / API 15,000 PSI. Factory-direct pricing, MOQ 10 sets, free samples available.

Quick Data
Standard ASME · ANSI · DIN
Max Pressure ANSI 2500# / API 15K
Dielectric 500 V/mil
Kit Types D · E · F · SS Core

Four Flange Insulation Kit Series

Choose by pressure class, flange type and insulating material

HIGH PRESSURE

SS Core Flange Insulation Gasket Kit

KXT-150 stainless steel core bonded to G10/G11 insulating laminate with spring-energized Teflon seal seated in a groove. For high-pressure service up to ANSI 2500# and API 15,000 PSI.

ANSI 2500# · API 15,000 PSI
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ISOLATION GASKET

Flange Isolating Gasket for High Pressure

KXT-150 flange isolating gasket with SS core, G10/G11 laminate and spring-energized Teflon seal. Seals and insulates raised-face, full-face and RTJ flanges up to ANSI 2500#.

RF · FF · RTJ Flanges
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STANDARD KIT

Flange Insulating Gasket Sets

Complete kit including gasket, sleeves, insulating washers and steel washers. Solves sealing and insulation problems on standard flanges while controlling stray currents.

Complete Set · 4 Components
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OIL & GAS

Neoprene Faced Phenolic Gaskets

Standard flat isolating gaskets for oil & gas service. Soft neoprene rubber factory-applied to both sides of a laminated phenolic retainer. Type E full-face and Type F ring.

Up to +80°C · 500 V/mil
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Why Choose Chinese Manufacturers?

China has emerged as a global hub for manufacturing excellence, combining advanced technology with competitive pricing. By partnering with Chinese manufacturers, you gain access to state-of-the-art facilities, rigorous quality control, and a vast supply chain network. Our factories leverage decades of experience producing flange insulation gasket kits tailored to meet international standards and customer-specific requirements.

The result: 30-50% cost savings compared to Western suppliers, without sacrificing quality. Every kit is dimensionally verified against ASME B16.5, ANSI, and DIN standards before shipping, and our engineering team works directly with buyers on custom specifications and material selection.

Key Features & Benefits

Engineered for reliability, efficiency and long service life in critical isolation service

01

High-Temperature Resistance

Reliable sealing under extreme temperatures — from cryogenic service up to +80°C for phenolic, higher for G10/G11 laminate with SS core.

02

Excellent Insulation Properties

Dielectric strength up to 500 V/mil, protecting against galvanic corrosion and stray currents in cathodic protection systems.

03

Corrosion Resistance

G10/G11 glass-reinforced epoxy laminate and phenolic materials resist aggressive chemicals, extending equipment life.

04

Easy Installation

Pre-cut kits with matched gasket, sleeves, insulating washers and steel washers — reduce installation time and labor costs.

05

Customizable Options

Available in any size, material (G10, G11, phenolic, neoprene-faced), and configuration — full-face Type E, ring Type F, or SS core.

06

Full Traceability

Mill Test Certificate, dimensional inspection record, and material composition report included with every shipment.

Applications Across Industries

Wherever stray currents and corrosion threaten pipeline integrity

01

Oil & Gas

Critical pipelines & valves

02

Chemical Processing

Aggressive chemical lines

03

Water Treatment

Cathodic protection systems

04

Refineries

Galvanic corrosion control

05

Power Generation

Turbine & generator circuits

06

Food & Beverage

Hygienic piping systems

07

Marine & Offshore

Seawater & platform piping

08

Storage Tanks

Tank farm isolation flanges

Our Manufacturing & Supply Chain

Our factory in China boasts advanced machinery and a dedicated team of engineers focused on continuous improvement. From raw material sourcing to finished product inspection, every step is meticulously controlled to ensure consistency and quality.

01

Raw Material Sourcing

G10/G11 laminate and phenolic sheet sourced from certified suppliers with full traceability.

02

CNC Precision Cutting

Gaskets, sleeves and washers cut to ASME B16.5 / ANSI / DIN dimensions with tight tolerances.

03

SS Core Bonding

For KXT-150 kits, stainless steel core is bonded to G10/G11 laminate and spring-energized Teflon seal seated.

04

QC & Packing

Dimensional verification, dielectric testing, Mill Test Certificate, safe export packing.

Learn more on our About Us page, or Contact Us for a factory audit.

CUSTOM DESIGN

Custom Solutions & Support

Understanding that one size doesn't fit all, we offer custom-designed flange insulation gasket kits tailored to your specific requirements. Our engineering team works closely with you to develop solutions that optimize performance, reduce costs, and enhance safety. Plus, our comprehensive after-sales support ensures you're never left hanging.

Discuss Your Project
FREE SAMPLE

Request a Free Sample Kit

Verify dielectric strength, material quality and dimensional tolerance against your own specification before placing a bulk order. Standard sizes available as samples — MOQ 10 sets.

Get Free Sample

Frequently Asked Questions

Are your flange insulation gasket kits compliant with international standards?

Yes. All our products adhere to international standards such as ASME B16.5, ANSI, and DIN, ensuring compatibility and reliability worldwide. Every kit is dimensionally verified before shipping and comes with a Mill Test Certificate.

How do I select the right gasket kit for my application?

Our experts can help you select the optimal kit based on your industry, operating conditions, and flange specifications. For general oil & gas service, choose the Neoprene Faced Phenolic Gasket. For high-pressure up to ANSI 2500#, choose the SS Core Kit. Contact us for personalized recommendations.

What materials are your gaskets made from?

We offer a range of materials tailored to resist different chemicals, temperatures, and pressures — including G10/G11 glass-reinforced epoxy laminate, laminated phenolic, neoprene-faced phenolic, PTFE, graphite, ceramics and specialty alloys. Each material is selected based on your service conditions.

What is the difference between Type D, Type E and Type F kits?

Type D is the ring-joint style for raised-face flanges. Type E is the full-face version covering the entire flange including bolt holes. Type F is the ring gasket version for ring-type joints. See our Type D Flange Insulation Gasket page for details.

Do you provide Mill Test Certificate and documentation?

Yes. Every shipment includes Mill Test Certificate, dimensional inspection record and material composition report. Third-party inspection (SGS, BV, TUV) is available on request. Contact us to discuss specific documentation requirements.

What is your MOQ, lead time and payment terms?

MOQ is 10 sets for standard sizes. Lead time is 7-15 days after order confirmation. Payment terms are T/T or L/C. Free samples are available — you only cover the courier cost. Send your inquiry for a fast quotation.

Get Factory-Direct Flange Insulation Gasket Kit Price

Tell us your flange size, pressure class, gasket material (G10 / G11 / phenolic / neoprene-faced) and quantity today — our sales team replies within 24 hours with a competitive quotation, Mill Test Certificate and free sample offer.

Send Inquiry Now
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Type D Flange Insulation Gasket

Type D Flange Insulation Gasket

Type D Flange Insulation Gaskets are suitable for RTJ flanges and can be produced according to ASME and API flange standards. The KXT-150 sealing gasket is an excellent alternative to Type D because the sealing element may be positioned anywhere between the I.D. of the gasket and the I.D. of the ring groove. Retainer materials: plain phenolic, G-7, G-10 and G-11.
Cathodic Protection Flange Insulating Gaskets

Cathodic Protection Flange Insulating Gaskets

Cathodic protection flange insulating gaskets are used for controlling losses due to corrosion. They control stray electric currents in piping at oil, gas, water, refinery, chemical and power plants, to increase the effectiveness of cathodic protection systems. Available in Type E full-face, Type F ring gasket and Type D RTJ gasket. Type D produced to ASME and API standards.
Flange Insulating Gasket Sets

Flange Insulating Gasket Sets

Flange Insulating Gasket Sets are used to solve the sealing and insulating problems of flanges, and to control losses due to corrosion and leakage of pipelines. They seal flanges and control stray electric currents in piping at oil, gas, water, refinery and chemical plants, to increase the effectiveness of cathodic protection systems.
SS316/SS316L Core Flange Insulation Gasket Kit

SS316/SS316L Core Flange Insulation Gasket Kit

SS Core Flange Insulation Gasket Kit — KXT-150 — includes the KXT-150 insulation gasket with stainless steel core bonded to G10 or G11 insulating laminate, G10 or G11 insulating sleeves, G10 or G11 insulating washers, and zinc-plated steel washers. The spring-energized Teflon seal is seated in a groove cut into the stainless steel core. For high-pressure service up to ANSI 2500# and API 15,000 PSI.
Flange Insulation Gasket for High Pressure

Flange Insulation Gasket for High Pressure

KXT-150 flange isolating gasket utilizes a stainless steel core bonded with high-strength insulating laminate G10 or G11. A spring-energized Teflon seal seated in the stainless steel core provides high-confidence sealing and eliminates costly leaks. Seals and insulates raised face, full face and RTJ flanges up to ANSI 2500# and API 15,000 PSI.
Neoprene-Faced Phenolic Gaskets

Neoprene-Faced Phenolic Gaskets

Neoprene-Faced Phenolic Gaskets are standard flat isolating gaskets for oil and gas service. Soft neoprene rubber is factory-applied to both sides of a laminated phenolic retainer, giving an effective sealing surface. Max working temperature approximately +80 °C. Available in Type E full-face and Type F ring gasket. Dielectric strength 500 V/mil, compressive strength 25,000 psi.
Flange Insulation Gasket Kits
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