HX Seal Rings
Product Description
Product Detail
HX Seal Rings – Bidirectional, Extreme‑Pressure Sealing for Subsea & Offshore
Kaxite Sealing is a leading China-based manufacturer and supplier of HX seal rings – a robust, bidirectional sealing solution engineered for the most demanding applications. Unlike unidirectional seals, HX rings work equally well in both pressure directions, making them the preferred choice for subsea and deep‑water environments where external pressures can exceed internal. With no practical pressure limit, these metal‑to‑metal seals deliver gas‑tight integrity in compact flange connections, meeting the highest industry standards.
As a trusted factory direct supplier in China, Kaxite offers custom sizes, NACE‑compliant materials, and competitive wholesale pricing. Request your price list and free sample →
Bidirectional Seal
Works equally well under internal or external pressure
Subsea Ready
Recommended for deep‑water and high‑external‑pressure conditions
No Pressure Limit
Engineered for extreme pressures without practical bounds
Gas‑Tight Metal Seal
Zero leakage, pressure‑energized design
Technical Specifications – HX Seal Ring
* Custom materials and coatings available. Contact our engineering team for bespoke solutions.
Why HX Seal Rings Excel in Demanding Environments
- ✅ Bidirectional sealing – ideal for subsea where external pressure dominates
- ✅ Reduced seal diameters – minimises flange size and weight
- ✅ Lower seating forces – easier installation and less bolt load required
- ✅ Pressure‑energised – seal tightness increases with pressure
- ✅ Reusable – high‑strength materials allow multiple cycles
- ✅ NACE compliant – suitable for sour gas and H₂S service
- ✅ Compact connector design – maximises load capacity
- ✅ Leak‑free metal‑to‑metal contact – eliminates elastomer degradation
Key Applications – HX Seal Rings
Material Selection Guide – HX Seal Ring Grades
* All grades meet NACE MR0175 hardness limits. Consult our materials engineer for specific recommendations.
Installation & Maintenance Best Practices
- 🔹 Inspect seal surfaces – Ensure flange grooves are clean, smooth, and free of scratches.
- 🔹 Lubricate lightly – Use a compatible anti‑seize compound to aid installation and prevent galling.
- 🔹 Verify orientation – HX rings are bidirectional, but ensure proper seating in the groove.
- 🔹 Torque evenly – Follow flange manufacturer's torque sequence and values for uniform bolt loading.
- 🔹 Pressure test – After installation, perform a hydrostatic or pneumatic test to confirm seal integrity.
- 🔹 Re‑torque after thermal cycling – For high‑temperature applications, re‑tighten bolts once the system reaches operating temperature.
- 🔹 Reuse potential – Inspect the ring after disassembly; if undamaged, it can be reused.
Frequently Asked Questions – HX Seal Rings
What makes HX seal rings different from IX or AX rings?
HX rings are bidirectional, meaning they seal equally well against pressure from either side. This makes them ideal for subsea applications where external hydrostatic pressure can exceed internal process pressure. IX and AX rings are typically unidirectional.
What pressure can HX seal rings withstand?
There is no practical pressure limit – they have been tested in excess of 20,000 psi. The actual limit depends on the flange design and material strength. For extreme HPHT conditions, we recommend 718 grade.
Are HX seal rings suitable for sour gas service?
Yes. Our HX seal rings are manufactured from materials that meet NACE MR0175 / MR0103 hardness limits. Grades 625 and 718 are commonly used in sour service environments.
Can Kaxite manufacture non‑standard sizes?
Absolutely. We supply custom sizes from 1/2" to 24" and larger, tailored to your flange dimensions. We also support custom materials, coatings, and marking.
What traceability and documentation do you provide?
Each ring comes with laser marking (grade, size, batch). We provide EN 10204 3.1 material certificates (3.2 optional), hardness test reports, dimensional inspection records, and NDT reports upon request.
What is the typical lead time for HX seal rings?
Standard lead time is 15–30 days for bulk orders, with expedited options available. Samples can be delivered in 5–7 days.
Why Source from Kaxite Sealing – Your Trusted China Partner
- ✔ 20+ years of metal sealing expertise
- ✔ ISO 9001 & PED certified manufacturing
- ✔ Exported to 40+ countries including Norway, UK, USA, and Middle East
- ✔ In‑house R&D and metallurgical laboratory
- ✔ Full traceability – material certs (EN 10204 3.1 & 3.2)
- ✔ Flexible logistics – sea, air, express from Ningbo/Shanghai
- ✔ Custom designs – any size, material, coating
- ✔ 24/7 technical support – responsive engineering team
Packaging & Worldwide Delivery
* Custom packaging and labelling available. View packaging & shipping details →
Ready to Order? Contact Kaxite – China's Reliable HX Seal Ring Manufacturer
As a premier China supplier of bidirectional HX seal rings, Kaxite provides high‑quality products at factory‑direct prices. Whether you need a sample, a price list, or a bulk order, our experienced team is ready to support you with technical advice and prompt service.
📞 Call us: 0086-574-87527771 | ✉️ Email: cindy@seal-china.com | 🌐 Visit: www.metal-jacketed-gaskets.com