Subsea valves regulate or isolate process flow within submerged pipelines and other equipment typically employed in oil and gas transportation. These valves are engineered to endure higher external pressure, saltwater corrosion, and extremely low temperatures. They undergo rigorous testing to ensure utmost reliability and adhere to API 6A, API 6DSS, and API 17D standards. Material selection is critical due to the risk of hydrogen embrittlement necessitated by cathodic protection requirements. Commonly used materials include A350 LF2, A182 F316, A182 F51, and A182 F55, meeting NACE standards for resistance to sulphide stress cracking in oilfield pipeline valves.
WELLHEAD & XMAS TREE
NARI Valves™ supply the key valves required to operate this equipment and to prevent flow issues:
-
API 6A
-
Slab Gate valves.
-
Rotary disc Gate Valves.
-
Needle valves.
-
Choke valves
-
Ball valves
PIPELINE SYSTEM
The pipeline system includes tie-ins, umbilicals, risers, injection pipelines, and production pipelines. The primary flow issues for subsea systems are hydrate, wax, asphaltene, scale, and corrosion. NARI Valves™ supply approved valves to aid the control of Oil and Gas.
-
API 6DSS
-
SSIVs valves.
-
Pigging valves.
-
Chemical Injection valves.
-
Hydraulic control systems valves.
-
ROV, Hydraulic or electric actuation.
-
Decommissioning valves
OPERATION OF VALVES
Valve actuation methods:
-
Diver operated.
-
ROV operated
-
Hydraulically operated.
-
Electrically operated.
-
Emergency shutdown.
VALVE SPECIFICATIONS
Contact us to place your valve orders and experience unmatched service and quality.