... of lower flexible joint and wall thickness of conductor on the dynamic characteristics on subsea wellhead have been evaluated and discussed. The analysis results show that the wave period and wave height are the most important factors affecting the dynamic characteristics on subsea wellhead. The rotational...

... a very thick wall to cope with such, hostile environment. This means that D / t , the diameter-to-wall-thickness ratio, must be low. The analytical limit-state equations included in DNV-ST-F101, a prevailing design standard for submarine pipeline systems, do not work well for pipe with extremely thick...

... to the Turkish gas-transportation network via the Black Sea, as shown in Fig. 1. The system currently has an annual capacity to transport 31.5 bcm of natural gas over approximately 940 km. The line pipe is longitudinally welded with a nominal outer diameter ( D ) of 813.0 mm (i.e., 32 inches) and wall thickness...

... results using the criteria in DNVGL-ST-F101 2017. The propagation buckling criteria is limited to pipeline within 15<D/t<45 in DNVGL-ST-F101 2017, the criteria in this code can be used in the design of high-pressure and large wall thickness pipeline within D/t≤15 and checked by finite element method...

.... The results show that traditional jacket structure doesn't meet the requirements of the specification. The wall thicknesses of pile legs need to be increased to improve the ice-resist performance of the jacket structure. The results show that the ice-resist performance can be improved effectively...

... verification, linepipe material selection, manufacturing quality control, advanced construction quality surveillance and "dry" pre-commissioning of the installed pipeline. midstream oil & gas wall thickness operation pipeline design excursion application hydrotest waiver offshore pipeline...

... Line Pipes in the range of diameters between 18" and 28" and wall thickness up to 40 mm, to demonstrate their suitability for sour service, offshore and low temperature applications. In particular, Sulphide Stress Corrosion Cracking resistance was explored by Four Point Bending Tests in environments...

... to calculate mean pipeline embedment. midstream oil & gas correlation upstream oil & gas submerged weight regression algorithm local polynomial regression dimension prediction classification algorithm predictor machine learning wall thickness algorithm curvature statistical model...

... ABSTRACT The paper examines the effects of, corrosion induced, wall-thinning on buckling of torispherical, hemispherical and ellipsoidal domed closures. It is assumed that the wall is corroded on outside, only. The ratio of corroded wall thickness, t c , to non-corroded thickness, t, is varied...

... joint thickness hot spot stress nominal stress renewable energy solid element welding seam load condition wall thickness wind energy offshore projects planning and execution offshore wind turbine diameter subsea system Study on SCFs of the Tower-Foundation Joints in Jacket Base Offshore...

... of the pipe. The residual stress was then measured during the manufacture of the flaw and was compared with the FE prediction. Ultrasonic measurements were then carried out on the outer surface of the pipe to provide the residual stress and the wall thickness. This ultrasonic sensor can therefore monitor...

... to wall thickness of 40 mm. This presented steel grade is already qualified according to DNV GL for toughness class F (- 60 °C), grade VL FO690QT. The new steel grade is based on a micro-alloyed low carbon concept, comprising a maximum carbon content of 0.08 wt.-% and a maximum CE IIW of 0.57 wt.-% (Pcm...

... are summarized. fatigue characteristic ool length assessment subsea system ool fatigue life calm buoy fatigue damage west africa pipeline wall thickness upstream oil & gas floating production system characteristic fpso buoy unit displacement wind sea exposure time buoy stress...

... wall thickness hms incentive analysis gas monetization lng new material technology pricing midstream oil & gas stainless steel material cost tank hms material lng tank cost savings material technology fabrication cost strength allowable stress liquified natural gas New...

... or inner diameter or wall thickness, respectively. Thus, the geometry of the tube section can be adapted to the stress distribution without the need of butt welding. It is figured out that with using shaped pipes, the framework can be optimized and the total weight of the structure can be reduced...

..., and full-scale testing (FST) to measure pipe strain capacity. tsc piping design proc piping simulation offshore exxonmobil hilo misalignment misalignment fairchild equation flaw size prediction overmatch pipeline benchmark case wall thickness flaw height weld strength overmatch...

... loading can have a significant influence on the strain capacity of girth welds. The major effect of biaxial loading is an increase in the crack driving force. In comparison, the materials resistance to fracture appears to be similar under uniaxial and biaxial loading. wall thickness prediction...

... of grade X100 / S690. Several industrial trials with various pipe dimensions and a wall thickness up to 40 mm were performed and were assessed in an experimental program for mechanical testing with tensile, CVN impact and hardness measurements. The micro structure was investigated by optical light...

.... The combined effect of the ovality and the wall thickness to outside diameter ratio (t/D) on the collapse pressure is derived from finite element analysis and the prediction formula constructed by DNV and Tamano. This study provides a reliable and beneficial solution for line pipe design in deepwater using R...

... of the proposed approach. Between them they cover the more popular failure prediction equations. Codified deterministic methods use unfavourable data; e.g. maximum corrosion depth, maximum corrosion rate, maximum design pressure and minimum wall thickness without allowing for uncertainties (Amirat et al, 2006...