High-pressure, Leak-proof Valves For Critical Industrial Applications
Api 6d fully welded trunnion ball valves are designed to meet the highest standards in the oil and gas industry.
High-pressure, Leak-proof Valves For Critical Industrial Applications
Api 6d fully welded trunnion ball valves are designed to meet the highest standards in the oil and gas industry.
API 6D Fully Welded Trunnion Ball Valve is a high-performance flow control device engineered for critical industrial pipelines, ensuring zero-leakage performance and robust sealing. Compliant with API 6D, ASME B16.34, and ISO 14313 standards, these trunnion mounted ball valves are crafted from forged carbon steel (A105), stainless steel (F316), or duplex stainless steel, offering exceptional corrosion resistant ball valve properties. Widely used in oil and gas transmission, petrochemical plants, natural gas distribution, and power generation, they provide reliable pipeline flow control under pressures up to 2500 PSI and temperatures ranging from -46°C to 200°C, ensuring safety and durability in harsh environments.
The API 6D fully welded trunnion ball valve features a fully welded body design, eliminating bolted joints to prevent leakage risks, making it ideal for underground or high-pressure applications. Available in sizes from 2" to 60" (DN50 to DN1500), they support butt-welded, flanged (RF, RTJ), or hub-end connections, with full or reduced port options. The trunnion-mounted ball, supported by fixed shafts, reduces operating torque and ensures stable sealing under high-pressure conditions, making it suitable for high-pressure ball valve applications. PTFE, RPTFE, or metal seats, combined with double block and bleed (DBB) or double isolation and bleed (DIB) functionality, provide leak-free performance, while surface treatments like electroless nickel plating or chemical nickel-plating per ASTM B733 enhance corrosion resistance for aggressive media like sour gas or seawater.
API 6D Fully Welded Trunnion Ball Valves undergo rigorous testing, including hydrostatic, pneumatic, radiographic, and ultrasonic inspections, to comply with API 598, API 6D, and NACE MR0175 standards for sour service. With a minimum tensile strength of 515 MPa and yield strength of 205 MPa for F316 stainless steel, these valves ensure structural integrity in demanding conditions. Fire-safe designs meet API 607 and API 6FA standards, and features like anti-static devices, blowout-proof stems, and emergency sealant injection ports enhance operational safety. These valves support manual, gear-operated, pneumatic, or electric actuation, with low torque requirements ensuring smooth operation in critical systems like natural gas pipelines.
Compared to bolted trunnion ball valves, the API 6D fully welded trunnion ball valve offers superior integrity by eliminating potential leak paths, making it ideal for buried installations and high-pressure systems. Certified by API 6D for pipeline safety and ISO 9001 for quality management, these valves are designed for long-term reliability with minimal maintenance. Specialized options, such as stem extensions for underground use or metal-seated designs for abrasive slurries, cater to specific needs like LNG pipelines or chemical processing. Their robust construction ensures resistance to hydrogen sulfide corrosion and stress cracking, making them a preferred choice for oil and gas applications.
Addressing challenges like pipeline leaks, corrosion, and high-pressure demands, API 6D Fully Welded Trunnion Ball Valves deliver reliable, efficient solutions for critical industrial piping systems. Their corrosion-resistant materials, leak-proof welded design, and advanced sealing make them a top choice for engineers seeking durable industrial ball valves. Backed by Sunny Steel’s white-glove service, these valves ensure exceptional performance, safety, and longevity in oil and gas, petrochemical, and power generation applications.
API 6D is the American Petroleum Institute’s specification for pipeline and pipeline valves used in the petroleum and natural gas industries. It covers requirements for the design, manufacture, assembly, documentation, and testing of ball, gate, plug, and check valves for pressure ratings up to ASME Class 2500.
API 6D applies to valves intended for pipeline service, focusing on performance, safety, and reliability. The standard defines criteria for:
API 6D ball valves are widely used in shutoff applications within petrochemical, power, and oil & gas industries. Their robust design ensures high performance and long-term reliability.
While API 6D specifies requirements for pipeline valves (design, manufacturing, and testing), API 598 focuses primarily on valve inspection and pressure testing. In practice, API 6D valves must also comply with API 598 testing requirements to ensure safety and reliability.
| Organization | Standard | Description |
|---|---|---|
| ANSI | American National Standards Institute | General industrial standards |
| API | American Petroleum Institute | Standards for oil and gas industry |
| ASME | American Society of Mechanical Engineers | Boiler and pressure vessel codes |
| BS | British Standards | UK national standards |
| GB, JB, HG | China Valve Standards | Chinese national and industry standards |
We offer valves in a wide range of materials to meet diverse industry requirements. Additional grades are available upon request.
| Material | Main Properties | Typical Applications |
|---|---|---|
| Carbon Steel | High strength, cost-effective | General industrial, water, oil & gas |
| Stainless Steel | Excellent corrosion resistance | Chemical, food, pharmaceutical |
| Alloy Steel | High temperature & pressure resistance | Power plants, refineries |
| Duplex Steel | High strength, seawater resistance | Marine, offshore, oil & gas |
| Nickel Alloys | Extreme corrosion & heat resistance | Chemical, aerospace, marine |
| Cast Iron | Low cost, limited strength | Low pressure water systems |
| Bronze & Brass | Seawater resistance | Marine, small valves |
Upstream, midstream, and downstream operations, including drilling, refining, and transportation.
Handling corrosive and hazardous chemicals in various chemical plants.
Steam, water, and fuel systems in thermal, nuclear, and hydroelectric plants.
Municipal water supply, wastewater treatment, and industrial water management.
Heating, ventilation, and air conditioning systems in commercial and industrial buildings.
Sterile and hygienic applications, precise flow control in sensitive industries.
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