Kaxite Sealing is an ISO 9001 certified metallic gaskets manufacturer and wholesale supplier in China. For over two decades, we have engineered high-integrity sealing solutions for oil & gas, petrochemical, power generation, aerospace and nuclear industries. Our product range covers API ring joint gaskets, spiral wound gaskets, Kammprofile gaskets, metal jacketed gaskets, corrugated gaskets and copper gaskets.
Metallic gaskets are robust sealing components manufactured primarily from one or more types of metal. Unlike soft, non-metallic gaskets, they are engineered to withstand extreme conditions in industrial applications. These conditions include high pressure and temperature, aggressive chemical exposure, and high mechanical load cycles.
The fundamental principle behind their operation involves the gasket material deforming plastically under bolt load to fill the microscopic imperfections on the flange faces, thereby creating a leak-tight seal. This makes metallic gaskets, especially those from leading manufacturers like Kaxite Sealing, indispensable in industries where safety, reliability and zero leakage are non-negotiable.
The performance of a metallic gasket is intrinsically linked to its material composition. Kaxite Sealing utilizes a range of high-grade alloys and metals, each selected for specific properties to meet diverse operational demands.
Excellent general corrosion resistance and good mechanical properties. 316/L grades provide superior resistance to chlorides and acids, ideal for chemical processing.
High strength and good temperature resistance, often used in high-pressure steam and hydrocarbon services.
Nickel-based alloys providing exceptional resistance to corrosion, oxidation and high-temperature creep. Essential for aerospace, nuclear and demanding petrochemical applications.
Softer metals that conform easily to flange faces, offering excellent conductivity. Often used in heat exchangers and certain low-pressure, high-temperature applications.
Extremely strong, lightweight and offers unparalleled corrosion resistance in chloride and oxidizing acid environments.
A family of nickel-molybdenum-chromium alloys with outstanding resistance to pitting, stress-corrosion cracking and a wide range of aggressive chemicals.
Kaxite Sealing offers a comprehensive portfolio of metallic gasket types, designed to conform to international standards such as ASME B16.20, API 6A and DIN.
Used primarily in the oil and gas industry for high-pressure, high-temperature wellhead and pipeline connections (API 6A, API 17D). They seal by initial line contact which deforms into a secure seal under high bolt load.
| Type | Standard | Pressure Rating (API) | Common Materials | Typical Applications |
|---|---|---|---|---|
| R | API 6A | 5,000 - 20,000 psi | Soft Iron, 316SS, Inconel | Wellhead Equipment, Christmas Trees |
| RX | API 6A | 10,000 - 20,000 psi | 316SS, Inconel 718 | High-Pressure Flowlines, Manifolds |
| BX | API 6A | 10,000 - 30,000 psi | Inconel 718, 316SS | Subsea Equipment, HPHT Wells |
A versatile and widely used gasket type, combining a preformed metal winding with a non-metallic filler such as graphite or PTFE. They provide excellent resilience and sealability across a broad pressure and temperature range.
| Inner/Outer Ring | Winding Material | Filler Material | Density | Pressure Class (ASME) |
|---|---|---|---|---|
| 304SS / None | 304SS | Flexible Graphite | Standard (3.2mm) | 150 - 600 |
| 316SS / 304SS | 316SS | PTFE | High (4.5mm) | 150 - 900 |
| Inconel 625 / 316SS | Inconel 625 | Ceramic | Standard (3.2mm) | 900 - 2500 |
When specifying a Kaxite Sealing metallic gasket, several key parameters must be considered to ensure optimal performance and longevity.
| Parameter | Specification |
|---|---|
| Temperature Range | From cryogenic -200°C (-328°F) to extreme heat services up to +1000°C (1832°F) for specialized alloys. |
| Pressure Rating | Capable of sealing systems from vacuum conditions to ultra-high pressures exceeding 30,000 psi (2070 bar). |
| Chemical Compatibility | Material selection is critical to resist corrosion from process media like acids, alkalis, hydrocarbons and steam. |
| Flange Surface Finish | Required finish typically 125-250 µin Ra for RTJ and 125-500 µin Ra for SWG. |
| Bolt Load & Gasket Stress | Each gasket type has a specific sealing stress and required bolt load to achieve proper seating and long-term tightness. |
| Creep Relaxation | The gasket's resistance to losing sealing force over time under temperature and pressure, a key strength of metallic designs. |
Wellheads, Christmas trees, flowlines, manifolds, subsea equipment and refinery process piping.
Reactors, heat exchangers, columns and process piping handling aggressive acids, alkalis and solvents.
Boilers, steam turbines, HRSG systems and high-temperature pipework in fossil, nuclear and biomass plants.
High-integrity sealing solutions for critical aerospace, nuclear and defense applications.
OFHC copper gaskets for high-vacuum CF flanges, particle accelerators and thin-film deposition equipment.
Copper head gaskets and exhaust gaskets for high-performance engines and racing applications.
Kaxite Sealing supports full custom and OEM metallic gasket manufacturing, from drawing review to sample approval and mass production. Our engineers work directly with your technical team to confirm dimensions, materials, tolerances and packaging.
Send your 2D/3D drawings, flange dimensions or old gasket samples. Our engineers review material, dimensions, tolerance and standard compliance within 24 hours.
We provide a detailed quotation including unit price, MOQ, lead time and packaging options. Custom MOQ may vary by material and size.
We produce free samples for your quality evaluation. Sample lead time is typically 5-7 working days for standard materials.
After sample approval, we start mass production with full dimensional inspection, material certificates and batch traceability.
Custom logos, labels, protective film, poly bags and pallets. We support neutral packaging and private label for distributors and brands.
Worldwide shipping by sea, air and express. Full export documentation: invoice, packing list, CO, MTR, COC and third-party inspection reports.
Kaxite Sealing operates an ISO 9001 certified quality management system. Our gaskets are produced to meet material and dimensional specifications of ASME, ASTM, API, DIN and EN standards. We provide full material traceability with Mill Test Certificates and Certificates of Conformity. Learn more about our company profile.
Our metallic gaskets are supplied to distributors, OEM brands and EPC contractors in 80+ countries across oil & gas, chemical, power and nuclear industries.
Every batch comes with mill test reports, material certificates and dimensional inspection records. Third-party inspection is available on request.
Custom dimensions, alloys, special profiles, cladding, plating, logos and packaging. Send your drawings and our engineers will confirm feasibility within 24 hours.
Kaxite Sealing supports distributors, OEM brands and EPC contractors worldwide. Below are typical cooperation cases and the inspection documents we provide for every bulk metallic gasket order.
A German refinery EPC contractor ordered 3,500 pcs of BX-type Inconel 718 ring joint gaskets to API 6A. Batch MTRs and dimensional reports were provided for each shipment.
A UAE industrial distributor placed recurring monthly orders of SS316/graphite spiral wound gaskets to ASME B16.20. Neutral packaging and private labeling were used.
A US semiconductor equipment OEM ordered OFHC copper gaskets for high-vacuum CF flanges. Samples were approved within 7 days and mass production started immediately after.
Mill Test Report (MTR) · Material Certificate · Dimensional Inspection Report · Certificate of Conformance (COC) · NACE Compliance Statement (on request) · Third-Party Inspection (SGS / TÜV / BV on request) · Packing List & Commercial Invoice
Q: When should I choose a metallic gasket over a non-metallic one?
A: You should specify a metallic gasket when the application involves one or more of the following conditions: operating temperatures above 450°C, internal pressures exceeding ASME Class 900, exposure to highly corrosive or oxidizing chemicals, requirements for high mechanical strength and anti-blowout properties, or where fire safety standards like API 6FB are mandated. For standard water, oil or low-pressure steam services at moderate temperatures, non-metallic gaskets may be sufficient.
Q: What is the MOQ for wholesale metallic gaskets from Kaxite Sealing?
A: Our standard MOQ is 50 pieces for wholesale orders. For custom sizes and OEM gaskets, MOQ may vary depending on material and dimensions. Free samples are available for quality evaluation before bulk purchase.
Q: How long is the lead time for bulk metallic gasket orders?
A: Standard lead time is 7-15 working days for most metallic gasket products. Custom and OEM orders may require 15-25 working days depending on specifications and order quantity. Rush orders can be accommodated upon request.
Q: How do I select the right material for my metallic gasket?
A: Material selection is a three-step process. First, identify the full chemical composition, concentration and phase of the process fluid. Second, determine the continuous and peak operating temperatures and pressures. Third, consider external environmental factors like offshore or sour service. Cross-reference this data with material compatibility charts and consult with Kaxite Sealing engineers who can recommend the optimal alloy based on proven industry experience.
Q: Can Kammprofile or spiral wound gaskets be reused?
A: Kammprofile gaskets are often designed for reuse if the soft facing layer is in good condition after disassembly. Spiral wound gaskets are generally not recommended for reuse as the winding can be disturbed or compressed during installation and removal. Kaxite Sealing advises inspecting any gasket after disassembly and replacing it if there are signs of winding distortion, filler degradation or permanent set.
Q: What causes a metallic gasket to fail and how can it be prevented?
A: Common failure modes include corrosion or chemical attack from wrong material selection, creep relaxation leading to leakage, crushing or over-compression from over-torquing, and blowout from insufficient bolt load. Prevention starts with correct gasket selection, ensuring flange faces are clean, parallel and have the correct finish, using calibrated torque wrenches in a cross-pattern sequence, and following specific torque values recommended for the gasket type and material.
Q: Does Kaxite Sealing offer custom metallic gasket designs?
A: Yes. Kaxite Sealing specializes in engineering custom metallic gasket solutions. We can manufacture gaskets to non-standard sizes, create special profiles for proprietary flanges, combine multiple materials through cladding or plating, and develop solutions for exceptionally high thermal cycling or severe corrosion.
Q: What certifications and quality standards do Kaxite Sealing metallic gaskets meet?
A: Kaxite Sealing is committed to the highest quality standards. Our manufacturing processes and products are compliant with ISO 9001:2015 for quality management. Our gaskets meet material and dimensional specifications of ASME, ASTM, API, DIN and EN standards. We provide full material traceability with Mill Test Certificates and Certificates of Conformity.
Tell us your application temperature, pressure, media and flange standard, and our engineers will respond within 24 hours with a competitive quotation and free sample offer.
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