Hammer Union Seals: Durable Sealing Solutions for Oilfield Connections

What Are Hammer Union Seals?

Hammer unions are critical pipe connectors used in oilfield systems for transferring high-pressure fluids such as drilling mud, crude oil, and fracturing fluids.

Each hammer union connection relies on a precision-engineered seal ring to ensure a leak-free joint under extreme pressure and temperature conditions.

At XHH Seals, we manufacture high-performance hammer union seal rings designed to provide reliable sealing in harsh environments—up to 15,000 psi.

XHH Hammer Union Seal Capabilities

XHH manufactures hammer union seal rings in sizes from 2" up to 4", available in multiple material options to meet diverse application demands:

• NBR (Nitrile Rubber): Excellent oil resistance and cost-effective performance for standard drilling and mud systems.
• HNBR (Hydrogenated Nitrile): Superior resistance to high pressure, oil, and gas environments.
• FKM (Viton®): Exceptional heat and chemical resistance for aggressive fluids.

• RGD-Resistant Compounds: Special formulations designed to resist Rapid Gas Decompression (RGD) damage in high-pressure gas applications.

Reinforced Anti-Extrusion Design

To withstand high-pressure pulsation and prevent seal blowout, XHH offers reinforced anti-extrusion rings, available in:

• Brass-reinforced Hammer Union Seals
• Stainless Steel-reinforced Hammer Union Seals

This reinforced design provides additional structural support and prevents seal deformation in demanding oilfield applications.

Hammer Union Types and Pressure Ratings

Key Advantages of XHH Hammer Union Seals

• Precision-molded and machined for leak-free performance
• RGD-resistant compounds for safe gas decompression
• Metal reinforcement options for superior extrusion resistance
• Available in standard and customized sizes (2”–4”)
• Compatible with FMC / Weco / ANSON hammer unions

Applications

XHH hammer union seals are widely used in:

• Oilfield drilling and mud systems
• Hydraulic fracturing lines
• Cementing and acidizing equipment
• Wellhead and choke manifold assemblies
• Offshore and onshore fluid transfer systems

Custom Options

Custom formulations, durometer hardness, and dimensions are available to suit your operating conditions.

Contact XHH Seals

XHH Seals provides hammer union seal rings and reinforced anti-extrusion rings engineered for long-lasting performance in demanding oilfield environments.

 xhh@xhh-smartech.com