Double Studded Adapter (DSA)

The Double Studded Adapter (DSA) is a flanged connection component with a through bore and dual ring grooves, each side featuring drilled and tapped bolt hole patterns and integrated end studs with fitted nuts. This design enables adaptation between flanges of differing nominal sizes, pressure classes, or face types, such as connecting a 150 lb API 6A flange to a 300 lb counterpart. The product is manufactured to meet API 6A specifications for wellhead and Christmas tree applications, with material options including carbon steel, alloy steel, and stainless grades as specified by the buyer.

Typical materials for this adapter include ASTM A105 for carbon steel or ASTM A182 F316 for corrosion resistance in sour service environments. The ring grooves conform to standard API 6A Class 2000, 5000, or 10000 profiles, and the stud threads are commonly 2B or 3A pitch, depending on pressure rating. Unlike spacer spools, DSAs are not symmetrical; each end is engineered to match the flange it connects, with differing bore diameters and bolt circle dimensions. The nuts are pre-fitted to prevent loss during handling and installation.

This adapter is primarily purchased by oil and gas contractors, wellhead manufacturers, and maintenance teams in upstream operations across the Middle East, North Sea, and Gulf of Mexico. Buyers typically require certification to API 6A, ISO 10423, or NACE MR0175 for sour service. Packaging is in wooden crates with rust inhibitors, and standard lead time is 4 to 6 weeks after order confirmation. MOQ is typically one unit, but bulk orders receive volume-based packaging discounts.

Dongying Lake Petroleum Technology Co., Ltd is a manufacturer based in Dongying, Shandong Province, China, with direct access to regional steel mills and machining facilities. The supplier specializes in API 6A flanges and related components, including double studded adapters, spacer spools, and blind flanges. Their listing indicates a harbor trust tier, suggesting verified export experience, but no third-party certification details, production capacity, or client list are disclosed.

The company does not publish information on workforce size, annual output, or revenue. Response rate and average reply time are not recorded, indicating limited buyer engagement or inactive customer service channels. Buyers should verify material test reports and dimensional drawings directly before placing orders. The supplier does not appear to offer in-house NDT or third-party inspection services unless requested.