The following topics would be addressed in OSG’s detailed materials specification:

• Acceptable codes and standards
• Quality assurance and control
• Manufacturing procedure specification including: steel source, steel making, billet forming, pipe forming, heat treatment
• Inspection and testing plans
• Chemical properties including: heat and product analysis, allowable chemical element ranges, CE/Pcm values
• Mechanical properties including: tensile, charpy, CTOD, hardness, macros
• Reeling, collapse, fatigue, HIC/SSCC/ SOHIC testing (if required)
• Hydrostatic test pressure requirements
• Acceptable tolerances for dimensions, weights and lengths
• Non-destructive inspection requirements
• Workmanship, visual inspection and repair of defects
• Marking and coating
• Transportation
• Documentation

OSG’s detailed automatic ultrasonic inspection specification addresses the following topics and is updated frequently, as inspection technology is advancing at a rapid pace:

• Applicable codes and standards
• AUT systems including, pulsed echo, tandem, time of flight and through transmission techniques
• Transducer requirements including, manufacturer, type, beam angle, frequency crystal size and shape and performance
• AUT calibration block requirements including, verification, machining tolerances for calibration reflectors
• AUT personnel requirements
• AUT system operation including gain settings for pipelines, calibration frequency
• Data interpretation including defining size and location of defects, thru-wall height, depth, weld pass and AUT channel nomenclature
• Types of defects including planar/linear, volumetric, cold lap or interpass lack of fusion, defect interaction, misalignment (hi/lo), surface breaking defects
• Use of time of flight diffraction (TOFD), defect interpretation, lateral beam spread
• Evaluation of critical welds for steel catenary risers (SCR’s) and top tension risers

OSGs detailed welding specifications address the following requirements:

• Acceptable codes and standards
• Welding procedure specification requirements
• Welding process selection
• Essential variables including, process, position, diameter-wall thickness groups, joint design, welding direction, shielding gas, filler metal, electrical characteristics, time between passes, pre and post weld heat treatment, type and removal of line up clamp, cleaning/grinding of slag and spatter
• Procedure qualification record
• Welding procedure qualification testing including, mechanical test matrix, tensile, charpy impact, hardness, CTOD’s, macros, weld metal overmatching
• Sulphide stress corrosion cracking, fatigue testing, reeling requirements (if required)
• Welder qualification / disqualification / identification
• Welding preparation including; surfaces, alignment and pre-heating
• Materials and equipment for welding including, shielding gases, handling and storage, welding machines, leads, shielding gas flow meters and analyzers
• Inspection and testing including, inspection matrix, methods of inspection, planar/linear defects, volumetric, MPI, UT, RT, AUT, engineering critical assessment
• Defective welds, pipe defects and allowable repair

• Induction Bending of Pipe (Carbon Steel and Duplex)
• Corrosion Protection – FBE / 3 layer coating / insulation / Subsea paint / field joint coatings for pipelines and risers
• Sacrificial Anode Fabrication and Installation (bracelet for pipelines, stand off for subsea structures)
• Subsea Equipment General Requirements
• Subsea Valves
• Tree, Manifold, and Jumper Insulation
• Coating and Cathodic Protection of Subsea Equipment
• Handling, Transportation, Storage and Repair of Line Pipe
• Buckle Arrestor Collars, J-Lay Collars and Bulkheads
• Offshore Deepwater Pipeline Sacrifical Anodes
• Internal Coating of Line Pipe
• Thermal Insulation Qualification Requirements
• Painting General Requirements
• Cathodic protection requirements for offshore pipelines
• Automatic Ultrasonic Testing (AUT) Qualification Requirements and Line pipe specifications (Carbon Steel, CRA lined or metallurgically bonded) These also need to consider manufacturing process eg DSAW, seamless, HFI/ERW etc.
• Bolts, nuts and gaskets
• AUT qualification requirements
• AUT for flowlines and SCR’s.
• Flowline welding requirements
• SCR Welding Requirements
• Subsea Structural Welding Requirements