Strategic Technology Committee for Oil & Gas
The EWI Strategic Technology Committee (STC) for Oil & Gas is an industry-based group that works to identify gaps between current technologies and industry requirements.
The EWI STC was founded to advance the state of materials joining and allied technologies within the oil and gas industry, and to assist in modernizing industry standards. Its role is to provide funding, industry insight, and technical guidance during the execution and development of STC projects.
The committee consists of senior technical experts from the major oil and gas operators, fabricators, material and welding consumable suppliers, and engineering companies within the industry. Member organizations are encouraged to have participation from multiple technical staff as appropriate (i.e., experts in NDE, welding, structural integrity, materials testing, etc.).
STC projects center around pre-competitive technologies in the areas of welding, materials joining and allied technologies such as nondestructive examination, materials testing, and structural integrity.
Major projects completed or in-process since 2013 include:
• Characterization of weld properties for arctic service
• Assessment of potential welding approaches for casing materials
• Integrity aspects for unintended subsea pipeline/flowline blowdowns
• Improved fracture toughness correlations for advanced high-strength steels and forgings
• Weldability of grade 70 and 80 plate steels for offshore structures
• Assessment of Inconel girth-weld strength mismatch effects
• Engineering critical assessment (ECA) guidance for subsea and offshore systems
• Comparison of nondestructive evaluation (NDE) methods for dissimilar metal welds (DMWs)
EFFECT OF CONSTRAINT ON BRITTLE FRACTURE OF WELD METAL
Resistance to brittle fracture for steel pipes is important to prevent the rapid growth of cracks from imperfections that can compromise safety and integrity. Recent testing HAS examined brittle fracture resistance at temperatures slightly below the lowest design temperatures that could be used for the welds. This project is ongoing.
ASSESSING NDE METHODS FOR DISSIMILAR METAL WELDS
This project will evaluate radiography (RT), phased-array ultrasonic testing (PAUT) and the Full Matrix Capture-Total Focusing Method (FMC-TFM) in their ability to detect, characterize and size a wide variety of flaws in a series of seeded dissimilar metal weld (DMW) defect coupons consisting of an Inconel girth weld in clad X65 pipe. The outcome will provide guidance on the reliability of these NDE methods for inspecting DMWs.
MANAGING BRITTLE FRACTURE IN SUBSEA HARDWARE, FLOWLINES AND RISERS (PHASE 2)
The objectives of Phase 2 of this project are to perform representative fracture testing of the base metal and welds in X70 line pipe to examine changes in measured toughness values and behavior due to constraint using SENB and SENT geometries. The outcome will provide guidance on the best approach for characterizing material properties and qualifying materials to ensure integrity under unexpected blowdown scenarios for subsea equipment.
FACTORS INFLUENCING COPPER CONTAMINATION OF GIRTH WELDS
Copper contamination in girth welds is a concern when welding using copper-backed internal lineup clamps.This project will identify conditions that give rise to contamination and surface hardness effects resulting from copper. In addition, feasibility studies will be carried out to identify potential automated methods for detecting the presence of copper in the weld pool.
WELDABILITY OF LOW MANGANESE LINE PIPE STEEL FOR SOUR SERVICE
A new ultra-low manganese X60 line pipe steel has been developed specifically for sour service conditions but has not yet been commercially deployed. Project objectives are to independently characterize the strength, toughness, hardness and SSC/HIC resistance of the heat affected zones in low manganese X60 – X65 line pipe steels, and provide independent mechanical property data for pipeline design and welding procedure specification for future projects using the new, sour-resistant steel.
DEVELOPMENT OF ECA GUIDELINES FOR SUBSEA AND OFFSHORE SYSTEMS
This project will provide a guidance document that will outline various approaches for performing an ECA, describe the nature and type of data required and the outputs that the ECA can produce, and illustrate how those results are used for inspection purposes and to assure safe operation of critical equipment. The document will assist personnel responsible for providing inputs to ECAs in understanding what data is needed.
EWI STC members are invited to participate in spring and fall member meetings in which project results are shared and reviewed. New projects are identified and selected at member meetings as well. Members are also encouraged to participate in project work groups which give guidance and direction during the execution of projects.
In addition to participation, STC members have exclusive access to written results of current and previous STC projects through the member’s only webpage.
To learn more joining the STC, contact firstname.lastname@example.org or call 614.688.5054.