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Visit our NEW VIDEO LIBRARY and learn everything you need to know about DUOLINE®!


Duoline Facility Slip Sheet

Duoline: Expanded Facilites, New Capabilities, Time Tested Technologies

Duoline Facilities Slip Sheet View


See for yourself what our expanded facilities and new capabilities can do for you!


Duoline Facilities Brochure

Duoline: Expanded Facilites, New Capabilities, Time Tested Technologies

Duoline Facilities View


See for yourself what our expanded facilities and new capabilities can do for you!


Duoline Hard-Copy Literature Request Form

Order literature and product information online.

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Request Duoline Technologies product literature hard-copies online. Simply fill out the online form and request literature.


Duoline Connection Options

Review all available Duoline Connection Options

Duoline Connection Options [PDF] View


DUOLINE® may be installed in threaded oilfield tubular goods with nearly any connection option. There are a few general "rules of thumb" regarding connection and connection protection devices for DUOLINE®.

API threaded connections generally employ the elastomeric DUOLINE® corrosion barrier ring (CBR) that has over 50 years of field history. The elastomeric ring manufactured from a high performance rubber compound ensures proper corrosion protection to the vulnerable connection area.

Premium connections employ a "T" shaped PTFE CBR with either the DL-Ring system, or the "FGL" variation to common premium threads.


Hydro Testing

For Duoline Products

Hydrostatic (Bar) Testing of Duoline Products (MS Word Doc. download) View


Hydrostatic (Bar) Testing of Duoline Products prior to or during installation is acceptable and successful testing can be, and has been, achieved in numerous situations when certain criteria are adhered to, as specified in the MS Word document link above.


Duoline 20 API Connection - Slip Sheet [PDF]

HOW DOES DUOLINE® 20 WORK?

Duoline 20 API Connection - Slip Sheet [PDF] View
Duoline 20 API Brochure [PDF] View
Duoline 20 API Tri-Fold [PDF] View


DUOLINE® 20, manufactured by DUOLINE® Technologies, is a filament-wound Glass-Reinforced Epoxy (GRE) liner which is installed to OCTG in corrosive service. It is widely accepted that GRE lining is a more robust alternative to internal plastic coating. DUOLINE®20 is a very effective corrosion barrier with a long history of tubular protection in a variety of offshore and landbased applications.


Duoline 20 Premium Connection

Premium Connection Slip Sheet & Brochure [PDF]

Premium Connection Slip Sheet [PDF] View
Premium Connection Brochure [PDF] View
Duoline 20 Premium Connection Tri-Fold [PDF] View


DUOLINE® 20, manufactured by DUOLINE® Technologies, is a filament-wound Glass-Reinforced Epoxy (GRE) liner which is installed to OCTG in corrosive service. It is widely accepted that GRE lining is a more robust alternative to internal plastic coating. DUOLINE®20 is a very effective corrosion barrier with a long history of tubular protection in a variety of offshore and landbased applications. Proven performance leader in corrosive (gas/fluid) injection and disposal for offshore and land-based applications.


DL-Ring Slip Sheet

DL-Product Product Overview

Click Here To Download! View


A unique corrosion barrier system enabling placement of GRE internal liners inside any shoulder-to-shoulder premium thread without the need for a special coupling!


DL-Ring + Premium Connection

DL-Ring Testing Slip Sheet

DL-Ring + Premium Connection [PDF slip sheet] View


Meet demanding laboratory test requirements when coupled with VAM® TOP HT in VME type highly stressed loading applications.

More than 500 hours of tests have been carried out with the DUOLINE® internal lining coupled with DL-RING and VAM® TOP premium connections. The tests have been carried out at the V&M Tubes test facilities. They give to the industry the reference of performance for DUOLINE® + DL-RING + VAM® TOP HT Premium connection.