... on these and the latest document dealing with it [1] presents recommendations for weld toe profiling by machining and grinding, weld toe grinding, TIG-dressing and hammer peening. The other important document in respect to the execution of improvement techniques is the IIW Recommendations, which contains extensive...

... are developed to facilitate development of reliability based fatigue design and requalification criteria, and guidelines for the inspection and maintenance of template-type offshore platforms. fatigue lives weld toe equation offshore technology conference otc 10849 register equation damage ratio...

... offshore technology conference equation otc 7798 offshore tubular joint research center stress range tubular joint weld toe subsea system fatigue test floating production system fatigue design offshore projects planning and execution fpso tubularjoint design line analysisfor...

... initiation specimen fatigue strength seawater strength ultrasonic impact treatment concentration upstream oil & gas metals & mining steel stress concentration residual stress fatigue resistance weld toe fatigue performance load ratio weld weldment thermal stress...

...Copyright 1990, Offshore Technology Conference aTC 6457 A further important consideration in repairing tubular joints which have failed in fatigue is the Removing material from the vicinity of weld toes by grinding is a well established technique for improving fatigue strength. When performed cor...

... axial southern platform brace 4 brace scf node extrapolation toe location weld toe OTC 6160 Stress-Concentration Factor Analysis of Large-Diameter Stiffened Nodes by W.F. Krieger and D.M. Mangin, Chevron Corp., and 8.8. Gholkar, Chevron Petroleum U.K. Ltd. Copyright 1989, Offshore Technology...

... a value of 5. K joints have small stress concentration factors, with a value of 2 as most probably a lower bound estimate. Hence, a resonable lower bound estimate of the stress concentration factor at the weld toe of tubular joints may be a factor of 3. (Superposition of the geometric stress concentration...

... upstream oil & gas offshore platform design requirement intensity configuration geometry crackedand dented x-node cutout requirement defect scf weld toe brace otc 5709 loading dent subsea system welding hydraulic fracturing platform OTC 5709 Repair of a Cracked and Dented X-Node...

... metals and composite materials. In addition, the process has potential for other operations, e.g. gouging and weld toe dressing of fillet welds and surfacing. Of the equipment required the crucial part of an abrasive water jet cutting system is the abrasive jet nozzle (fig 1). Water is pressurised up...

... specimen reliability perpendicular casing and cementing upstream oil & gas casing design weld toe configuration loading estimation prediction brace scf extrapolation fatigue design equation ueg equation gauge stress concentration factor wordsworth principal stress...

..., and it was found to have a great effect on crack initiation life. Increase in plate thickness caused increase in stress concentration at the weld toe. It was concluded that the difference in stress concentration was a major cause of the size effect. INTRODUCTION The thickness of steel plates used for offshore...

.... Individual curvi-linear extrapolation of strains parallel, perpendicular and at 45° orientations to the weld toe and combined to obtain the maximum principal stress. Curvi-linear extrapolation of strains perpendicular to the weld toe. (e) (b) (a) Definition of 'hot-spot' stress (and hence SCF). Design codes...

... being material constants. This stress intensity factor range is the difference between the maximum and minimum stress intensity factor (K) during the load cycle. The stress intensity factor describes the stress field near the tip of the crack. In a tubular joint where the crack initiates at the weld toe...

... the influence of two weld finishing techniques on the fatigue behaviour of tubular joints, viz.: - grinding of the weld toe - improvement of the overall weld shape. TEST PROGRAMME Ten tests on large tubular T-joints (¢ 914) were carried out by the Stevin Labor~50ry of Delft University of Technology and the TNO...

... number of test specimens (17 out of 175 failures) the fatigue crack, which caused complete failure, initiated at the weld toe of the brace wall. In several cases the failure did not occur at the brace, although the hot spot strain range at the brace was substantially higher than at the chord. From...

... covered by existing design curves. Of particular interest are the fatigue crack developments in the 457mm diameter joints, which show extensive weld inter-run cracking on many specimens in preference to weld toe cracking. This suggests that weld toe grinding alone may not be effective in improving...

... ABSTRACT This paper describes the fatigue behavior of monopod tubular joints in air and cold ocean environments. The test program includes testing of seven joints under constant amplitude and pseudo-random loadings in as-welded and weld toe ground conditions. The corrosion tests were carried...

... fatigue life cone toe radius geometry reinforcement weld toe curvature fatigue life improvement factor weld upstream oil & gas welding artificial intelligence test group weld reinforcement load level thickness weld angle improvement factor propagation specimen leg length...

.... The steel quality was API-5LX Grade X5. The consumables used had a grade notation of 3YHH and the following classifications: AWS-E7016; DIN-E5144 B10 or 130-E514 B 14 (H). The geometry of the weld toe and the weld surface, at top and bottom, satisfy the A,vS-requirements 5 for stress category Xl...

... 4.2.1.11) it is defined as 'that which is as near the weld as possible without being influenced by the weld profile'. The range of influence of the weld profile on stresses is not defined. intersection recommendation hot spot stress strength design curve weld toe upstream oil & gas...