3" FIG 1502 Positive Choke Assembly – Sour Service (With Tap, Without Plugs)

The 3" FIG 1502 Positive Choke Assembly for Sour Service is a high-capacity, heavy-duty flow restriction valve engineered specifically to safely manage fixed flow rates in the most hazardous and corrosive H2S environments. Built to safely withstand extreme working pressures up to 15,000 PSI (15K CWP), this integral hammer union choke is a critical component for large-bore well testing, highly corrosive flowback operations, and production manifolds requiring constant, regulated flow.

Unlike adjustable chokes that use a moving stem and seat, a positive choke utilizes precisely machined, interchangeable fixed-orifice flow beans. This design provides a reliable, predetermined, and tamper-proof flow rate, which is heavily preferred in extended well testing and continuous production phases where the flow profile must remain strictly constant.

Operating in sour gas (H2S) environments exposes flowline equipment to severe risks, primarily Sulfide Stress Cracking (SSC). To guarantee safety, this entire choke body is manufactured from specialized, corrosion-resistant steel alloys strictly heat-treated to meet or exceed NACE MR0175 / ISO 15156 standards.

Additionally, this high-volume choke body features an integrated tapped port ("With Tap"), providing a direct connection point for pressure gauges, sensors, or fluid sampling lines directly at the choke. It is intentionally supplied "Without Plugs," giving field personnel the flexibility to install their specific instrumentation exactly as required.

Features & Benefits

• Sour Service Compliant: Manufactured from highly specialized alloys and heat-treated to strict maximum hardness levels in full compliance with NACE MR0175 / ISO 15156 for safe H2S operation.

• Fixed Flow Control: Designed to house standard interchangeable fixed choke beans, ensuring precise, constant, and unalterable flow rates during production or testing.

• High-Volume Capacity: The large 3-inch bore design handles high-yield well returns and massive fluid volumes safely and efficiently.

• Extreme Pressure Rating: Built to withstand up to 15,000 PSI cold working pressure in the most demanding drilling and production environments.

• Integral Tapped Port: The body tap provides quick and easy access for pressure monitoring equipment, enhancing situational awareness in hazardous zones.

• FIG 1502 Connections: Integral hammer union ends provide fast, secure, and leak-free makeup and breakout in the field.

Specifications & Technical Details

Applications

The 3" FIG 1502 Positive Choke Assembly for Sour Service is a mandatory safety asset for high-volume surface pressure control in hazardous environments. Typical applications include sour well testing packages, H2S production choke manifolds, high-rate flowback iron setups, and long-term production manifolds where a fixed, corrosive-resistant flow restriction is required.

Quality Assurance

All our sour service choke assemblies undergo rigorous metallurgical testing and strict quality control processes. The forged bodies are verified for proper hardness levels to ensure maximum resistance to Sulfide Stress Cracking. Each unit undergoes strict hydrostatic pressure testing prior to shipment to ensure shell integrity under maximum working loads. Full material traceability and NACE certification are available.

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