H2S Resistant Hammer Union Seals | FKM with Stainless Steel Backup Ring | 15,000 PSI CWP

Overview

Engineered for Sour Service & High-Temperature Extremes 

In the most volatile environments of the oilfield—where high-pressure meets H2S and extreme heat—standard NBR seals will fail. Our Premium FKM Hammer Union Seals with Stainless Steel Backup Rings are the ultimate defense for your flowline integrity.

Specifically designed for Sour Service (H2S) and high-pressure applications like Fig 1502, these seals combine the chemical inertness of high-grade Fluoroelastomer (FKM) with the rigid structural support of a Stainless Steel anti-extrusion ring. This is the professional choice for 15,000 PSI Cold Working Pressure (CWP) operations where safety and uptime are non-negotiable.

Key Features and Benefits

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• Engineered for Sour Service (H2S): Our specialized Fluoroelastomer (FKM) compound is chemically inert to Hydrogen Sulfide, preventing the swelling, hardening, and cracking that causes NBR seals to fail in sour environments.

• Premium Stainless Steel Reinforcement: Unlike brass rings that can corrode in sulfur-rich fluids, our Stainless Steel anti-extrusion ring provides permanent structural integrity and zero-corrosion reliability.

• High-Pressure Blowout Protection: The integrated backup ring bridges the clearance gap in the union, ensuring the seal maintains its shape even under 15,000 PSI pressure spikes.

• Extended Thermal Stability: Maintains a positive seal in extreme temperatures ranging from -15°F to 446°F, ideal for HPHT (High Pressure High Temperature) wells.

• Pressure-Energized Design: The lip profile is designed to use internal line pressure to increase the sealing force, ensuring a leak-proof connection from low-pressure startup to full-load operation.

Technical Specifications

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Performance Parameters

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•  Cold Working Pressure (CWP): Rated up to 15,000 PSI (for Fig 1502).

• Temperature Range: -15°F to +446°F (-26°C to +230°C).

• Media Compatibility: H2S (Sour Gas), CO2, Crude Oil, Steam, Acidizing Fluids (HCl/HF), Aromatic Hydrocarbons.

• Compression Set:** Excellent resistance to permanent deformation under long-term load.

• Extrusion Resistance: Maximum support at clearance gaps up to 0.030" at 15k PSI. 

Common Applications

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Our FKM/SS seals are the "Gold Standard" for high-stakes oilfield servicing: Sour Gas Production: Critical sealing in wells with high H2S and CO2 concentrations.

1. Well Stimulation & Acidizing: Handling aggressive chemicals and acids that degrade standard Nitrile seals.

2. Steam Injection & Geothermal: Reliable performance in high-temperature EOR (Enhanced Oil Recovery) operations.

3. High-Pressure Fracturing: The go-to seal for discharge manifolds in "Iron" fleets operating in corrosive basins.

4. HPHT Well Testing: Providing safety and security during initial flowback and testing of deep, high-pressure wells.

FAQ

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Q1: When should I choose FKM with Stainless Steel over NBR with Brass?
A: You should upgrade to FKM/SS whenever H2S is present, or when operating temperatures exceed 212°F. Stainless steel is required for sour service because brass can suffer from sulfide stress corrosion.

Q2: Will these seals work with my existing Fig 1502 Hammer Unions?
A: Yes. Our seals are designed to meet the standard geometric profiles of Figure 1502, 1002, and 602 unions, ensuring a seamless fit with your current inventory.

Q3: What is the benefit of the Stainless Steel ring at 15,000 PSI?
A: At 15k PSI, rubber becomes almost fluid-like. The SS ring acts as a rigid wall that prevents the rubber from being pushed through the tiny gaps in the union, preventing "blowouts."

Q4: Can these seals handle high concentrations of Hydrochloric Acid (HCl)?
A: Yes, FKM is highly resistant to most acids used in well-acidizing, making it far superior to NBR in stimulation service.

Q5: What is the recommended shelf life for FKM seals?
A: FKM has an exceptional shelf life of 20 years if stored in a cool, dry place away from direct sunlight and ozone, making it a great "buy-and-hold" inventory item.