会社のニュース CCSC Petroleum Strengthens Wellhead Connectivity with High-Performance Double Studded Adapter Solutions

Shanghai, China – February 2026

In a strategic move to support more versatile, efficient, and reliable oilfield infrastructure, CCSC Petroleum Equipment Ltd. has underscored its advanced Double Studded Adapter (DSA) — a critical wellhead component engineered in accordance with the API 6A standard and designed to interconnect flanges of differing sizes and pressure ratings. The DSA plays a pivotal role in facilitating seamless transitions within complex production systems, underpinning safety and reliability across drilling, completion, and processing operations worldwide.

Commonly referred to in the energy industry as an adaptor flange or DSA flange, this product is engineered for application within wellhead systems, Christmas tree assemblies, pressure control stacks, and other high-performance flowline environments. By enabling the connection of flanges with differing specifications, the Double Studded Adapter supports modular design, flexible configuration, and rapid deployment of surface equipment under high stress conditions.

In oil and gas systems, flanges form the backbone of pressure-containing connections. They serve to join valves, manifolds, pipes, and control equipment, often across regions of varying diameter and pressure rating. However, mismatches in flange connections — whether due to differing nominal sizes or unequal pressure classes — pose significant challenges during assembly and must be reconciled without compromising system integrity or safety. This is where Double Studded Adapters become indispensable.

Unlike standard spacer flanges or crossover fittings, a Double Studded Adapter features studded connections on both ends — allowing it to mate directly with two separate flanges that otherwise could not be joined due to size or rating discrepancies. Each side has its own pattern of “tap-end studs" which thread into tapped holes in the adapter body, corresponding to the bolt circle and dimensions of the flange it mates with. This design allows the adapter to serve as the shortest, most direct component to connect two dissimilar flanges without introducing additional length or elbow changes into the system.

By enabling direct transitions between API connections — and even between API and other standards such as ASME or MSS — the DSA enhances field flexibility and reduces installation complexity. It is especially useful where tight space constraints or stringent layout needs preclude the use of long spool connections or multi-piece assemblies.

The Double Studded Adapter from CCSC Petroluem is designed in strict accordance with API 6A specifications, ensuring robust performance and compliance with international safety and quality standards. API 6A defines design, materials, testing, and performance requirements for wellhead and Christmas tree equipment, and DSA components are typically manufactured using high-strength forged materials suitable for demanding oilfield environments where pressures commonly exceed thousands of PSI.

Such adapters are available in sizes spanning a wide range — with examples ranging from configurations like 2-1/16″ up to 21-1/4″ on one side, reflecting how they can link major surface equipment to smaller bore pipelines or control assemblies. Pressure ratings similarly range from 2,000 psi to 20,000 psi (or more), depending on design class and service requirements, making them suitable for connecting high-pressure wellhead hardware.

CCSC’s DSAs are also designed with flexibility in mind. Custom variations can transition between API, ASME, or other industrial standards, and adapters can be supplied with specific flange thicknesses to match customer layout and spacing requirements. This adaptability is especially important in modern project design, where modular systems must integrate with both legacy and new equipment.

Double Studded Adapters play a vital role in multiple phases of exploration, drilling, and production:

• Wellhead Assemblies: DSAs allow mismatched pressure control devices, surface valves, or tree components to be linked to wellhead flanges, ensuring a secure, leak-proof connection that maintains well integrity.
• Pressure Control Systems: In choke manifolds, blowout preventer (BOP) stacks, or kill manifolds, DSAs facilitate transitions between different flange ratings and sizes, supporting safe pressure regulation during drilling and completion operations.
• Pipeline Integrations and Repairs: When pipeline segments, surface test headers, or production fittings require size conversion — perhaps due to renovation, upgrade, or reconfiguration — DSAs enable compatible mating without costly spools or re-threading.

Because of this versatility, Double Studded Adapters are often specified by engineers in project designs early on, particularly where performance, safety, and space efficiency are critical considerations.

Because Double Studded Adapters are often deployed in environments handling oil, natural gas, and drilling mud — and may encounter conditions involving sour service (e.g., hydrogen sulfide exposure) — material selection and corrosion resistance are crucial.

CCSC’s products are typically forged from rugged steel alloys and can be supplied with corrosion resistant components — such as stainless steel 316L or Inconel 625 ring grooves — to protect seating surfaces and extend service life. These corrosion resistant alloys improve durability when exposed to aggressive fluids, high temperatures, or cyclic loading conditions common in oilfield applications.

Adapters also come complete with tap-end studs and nuts, facilitating installation and ensuring that each adapter can be connected securely without the need for additional hardware. This complete assembly approach reduces project complexity and accelerates field deployment.

Modern oil and gas systems prioritize modularity, compact design, and ease of assembly — particularly in surface equipment where flowlines, valves, manifolds, and test trees intersect. A Double Studded Adapter supports these priorities by enabling direct transitions while minimizing equipment stack height and reducing the number of intermediate connections. This can lead to cost savings in materials and installation time and improves maintainability by reducing weak points such as unnecessary spools.

In fracturing operations, for example, production trees and manifold assemblies often involve numerous different equipment types and connection interfaces. Adapters like DSAs help streamline these interfaces, preserving system integrity without sacrificing flexibility or safety.

As energy development continues in both conventional and unconventional basins — from North America’s shale plays to offshore fields in Asia and the Middle East — the demand for reliable components that support high-pressure, high-performance systems has increased. Equipment that can adapt to multiple standards and configurations is especially valuable as global operators integrate legacy equipment with modern infrastructure upgrades.

The ability to customize Double Studded Adapters for specific project requirements also reflects broader trends in engineered components — where adaptability and ease of integration are essential to optimize capital expenditure and reduce operational risk.

The Double Studded Adapter from CCSC Petroleum Equipment Ltd. represents an essential solution in modern oilfield design, addressing the critical need to connect flanges of different sizes and pressure ratings while maintaining structural integrity and operational safety. Manufactured to API 6A standards and available in a range of configurations, this adaptor flange enhances the flexibility, reliability, and modularity of wellhead, pressure control, and pipeline systems.

As the global energy sector continues to evolve, components like DSAs — engineered for high pressure, complex configurations, and seamless integration — will continue to play a key role in supporting safe and efficient operations from drilling through production and beyond.