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Vigor Mework Petroleum Equipment Co., Ltd
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API6A/16A Double Studded Adapter Flange (DSAF) for Wellhead Drilling Connection Std Sour Service


DSAF (Double Studded Adapter Flange) is a combination of flanges of different sizes and pressure ratings. VigorPetro supplies DSAF (Double Studded Adapter Flange) in various sizes and pressure ratings as per customer’s specified thickness, consistent with design considerations.


VigorPetro's Double Studded Adapter Flanges (DSAF) are fully designed, manufactured and tested according to API 6A/16A and NACE MR0175 standards. The Basic material of construction is high quality integral forged AISI4130 alloy steel or AISI 410 Stainless Steel. For corrosion resistance, overlays like SS 316L or Inconel 625 can be incorporated to improve product life if required. Available in sizes from 1-13/16" to 26-3/4" and working pressure up to 20000PSI. 

The studs and nuts are available with Zinc Coated, Cadmium Coated, or Xylan Coated. Other sizes, material, and pressure ratings are also available upon request.


DSAF (Double Studded Adapter Flange) Specifications:

Product Name: Double Studded Adapter Flange (DSAF) or Double Studded Adapter (DSA)

Flange Size: 1-13/16" - 26-3/4"

Working Pressure: 2000PSI, 3000PSI, 5000PSI, 10000PSI, 15000PSI, 20000PSI

Material: AISI 4130(forged)/ AISI 410SS/ SUS316/Inconel 625

Studs & Nuts Coating: Zinc Coated, Cadmium Coated, Xylan Coated

Temp Class: PU, U, LU, KU, PX

Material Class: AA, BB, CC, DD, EE, FF, HH

Working Medium: Petroleum, Natural Gas, Mud etc

Product Specification Level: PSL1, PSL2, PSL3, PSL3G, PSL4

Performance Requirement: PR1, PR2

Standards: API 6A, API 16A, NACE MR0175, ASME, ISO 9001, ANSI

Service Conditions: Standard or Sour Services

Application: Wellhead, Manifold, Shipbuilding, Pipe Projects etc


Data Sheet for Conventional Models - DSAF (Double Studded Adapter Flange):

Double Studded Adaptor Flang-vp.jpg

Vigor Mework Petroleum Equipment Co., Ltd - VigorPetro is a professional manufacturer of API 6A Wellhead & Christmas Trees, API6A Gate Valves, API 6A Flanges, API 16A Blowout Preventers, API 16C Choke & Kill Manifolds etc. Aside from the Double Studded Adapter Flange, we also produce and sell Welding Neck Flange, Threaded Flanges, Spacer Spool Flanges, Blind Flanges, Companion Flanges, Target Flanges, Test Flanges and Adapter Spools for all client needs.


Any enquiry please contact us by email: or  Visit our website: or for more products information. WhatsApp/WeChat:+0086 18280277398

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Office Address: No. 180 Shulong Road, Xindu District, Chengdu City, Sichuan Province, China
Factory Address: Jianhu County, Yancheng City, Jiangsu Province, China
Tel: 0086-18280277398