A calculation method for limit load of the gas pipelines with girth weld surface cracks
نویسندگان
چکیده
منابع مشابه
Engineering Critical Assessments of Marine Pipelines with 3D Surface Cracks Considering Weld Mismatch
Offshore pipelines are usually constructed by the use of girth welds, while welds may naturally contain flaws. Currently, fracture assessment procedures such as BS 7910 are based on the stress-based methods and their responses for situations with large plastic strain is suspicious. DNV-OS-F101 with limited modifications proposes a strain-based procedure for such plastic loads. In this paper 3D ...
متن کاملEngineering Critical Assessment for Offshore Pipeline with Semi Elliptical Surface Cracks in Girth Weld – Comparison of FEM and BS7910 Guideline
Economical design with sufficient fracture resistance is of high importance in any offshore pipeline projects. Using an Engineering Critical Assessment (ECA), alternate acceptance criteria for pipeline girth weld inspection can significantly reduce the cost of constructing of offshore oil and gas pipeline by minimizing unnecessary repairs. Offshore pipelines consist of short pipeline segments c...
متن کاملExperimental determination of the annealing effect on critical area of HSLA multi-pass girth weld at natural gas pipelines
Shield metal arc welding on the high strength low alloy steels in pipelines to transport natural gas from Iran is of great importance. In this article the effects of annealing heat treatment on properties of multi pass welding in different situations (6-4:30 , 4:30-3 , 3-1:30 , 1:30-12) with 36 in outside diameter is evaluated by chemical, metallography, tensile, toughness and hardness. Tensil...
متن کاملExperimental determination of the annealing effect on critical area of HSLA multi-pass girth weld at natural gas pipelines
Shield metal arc welding on the high strength low alloy steels in pipelines to transport natural gas from Iran is of great importance. In this article the effects of annealing heat treatment on properties of multi pass welding in different situations (6-4:30 , 4:30-3 , 3-1:30 , 1:30-12) with 36 in outside diameter is evaluated by chemical, metallography, tensile, toughness and hardness. Tensil...
متن کاملINVESTIGATING THE EFFECT OF CRACK GEOMETRIES AND WELD MISMATCHING IN ORDER TO OPTIMIZE ECA ANALYSIS OF GIRTH WELDED OFFSHORE PIPELINES
Offshore pipelines are an effective tool for transportation of oil and gas which are usually assembled by the use of girth welds. Since flaws may naturally exist at such welds, fracture assessment of girth welded offshore pipelines is substantial. Current fracture assessment procedures like BS 7910 consider identical material properties for the weld and the base metals. However the strength dif...
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ژورنال
عنوان ژورنال: Natural Gas Industry B
سال: 2019
ISSN: 2352-8540
DOI: 10.1016/j.ngib.2019.03.004