Specification for UNS N08925, UNS N08354, and UNS N08926 Seamless Pipe and Tube

2021 ◽  
Author(s):  
Keyword(s):  
Seamless Pipe

scholarly journals A Useful Manufacturing Guide for Rotary Piercing Seamless Pipe by ALE Method

2020 ◽  
Vol 8 (10) ◽  
pp. 756
Author(s):  
Ameen Topa ◽  
Burak Can Cerik ◽  
Do Kyun Kim
Keyword(s):  
Numerical Simulations ◽  
Maximum Stress ◽  
Three Dimensional ◽  
Material Model ◽  
Manufacturing Processes ◽  
Arbitrary Lagrangian Eulerian ◽  
Analysis Method ◽  
Seamless Pipe ◽  
Ale Formulation ◽  
Good Agreement

The development of numerical simulations is potentially useful in predicting the most suitable manufacturing processes and ultimately improving product quality. Seamless pipes are manufactured by a rotary piercing process in which round billets (workpiece) are fed between two rolls and pierced by a stationary plug. During this process, the material undergoes severe deformation which renders it impractical to be modelled and analysed with conventional finite element methods. In this paper, three-dimensional numerical simulations of the piercing process are performed with an arbitrary Lagrangian–Eulerian (ALE) formulation in LS-DYNA software. Details about the material model as well as the elements’ formulations are elaborated here, and mesh sensitivity analysis was performed. The results of the numerical simulations are in good agreement with experimental data found in the literature and the validity of the analysis method is confirmed. The effects of varying workpiece velocity, process temperature, and wall thickness on the maximum stress levels of the product material/pipes are investigated by performing simulations of sixty scenarios. Three-dimensional surface plots are generated which can be utilized to predict the maximum stress value at any given combination of the three parameters.

scholarly journals Recent Development of Motor Speed Control System and It's Application to Seamless Pipe Mill

2000 ◽  
Vol 86 (2) ◽  
pp. 99-104
Author(s):  
Shunji FUKUSHIMA ◽  
Satokazu YOSHIDA ◽  
Hisao GOTO ◽  
Chihiro HAYASHI
Keyword(s):  
Control System ◽  
Speed Control ◽  
Motor Speed ◽  
Seamless Pipe ◽  
Speed Control System ◽  
Pipe Mill

Offshore Installation of Welded Pipe: Local Buckling Evaluation

2010 ◽  
Author(s):  
Luciano Mantovano ◽  
Richard E. Bravo ◽  
Sebastian Cravero ◽  
Hugo A. Ernst
Keyword(s):  
Numerical Models ◽  
Local Buckling ◽  
Good Control ◽  
Plastic Instability ◽  
Lead Times ◽  
Geometrical Parameters ◽  
Seamless Pipe ◽  
Project Costs ◽  
Girth Welds ◽  
Welded Pipe

Up to the present, most of the pipes used in offshore applications installed with methods introducing plastic deformation have been seamless pipes; however, welded pipes can also be used. Welded pipes offers benefits over seamless pipe in terms of improved lead times, lower project costs, tighter dimensional tolerance and good control of mechanical properties and chemistry resulting in excellent weldability. During installation of welded pipes, failure by fracture, plastic collapse and local buckling may occur. In this work, the occurrence of the local buckling phenomenon, produced during the installation method, was evaluated. Numerical models were developed to study the effect of materials and geometrical parameters on the local bucking of pipes subjected to bending. Specifically, the loads and strains at which the plastic instability occurs were determined for each particular condition. In addition, the influence of longitudinal and girth welds on the local bucking occurrence was assessed.

Strain distribution analysis of hot forged seamless pipe fittings

2000 ◽  
Vol 16 (2) ◽  
pp. 171-174 ◽  
Author(s):  
A. Rodríguez ◽  
G. Olvera ◽  
P. Fodor ◽  
R. Colás
Keyword(s):  
Strain Distribution ◽  
Distribution Analysis ◽  
Seamless Pipe ◽  
Pipe Fittings

scholarly journals 3D Numerical Simulation of Seamless Pipe Piercing Process by Fluid-Structure Interaction Method

2018 ◽  
Vol 203 ◽  
pp. 06016 ◽  
Author(s):  
Ameen Topa ◽  
Do Kyun Kim ◽  
Youngtae Kim
Keyword(s):  
Numerical Simulations ◽  
Fluid Structure Interaction ◽  
Three Dimensional ◽  
Rolling Process ◽  
Arbitrary Lagrangian Eulerian ◽  
Analysis Method ◽  
Seamless Pipe ◽  
Fluid Structure ◽  
Structure Interaction ◽  
Ale Formulation

Seamless pipes are produced using piercing rolling process in which round bars are fed between two rolls and pierced by stationary plug. During this process, the material undergoes severe deformation which renders it impractical to perform the numerical simulations with conventional finite element methods. In this paper, three dimensional numerical simulations of the piercing process are performed with Fluid-Structure Interaction (FSI) Method using Arbitrary Lagrangian-Eulerian (ALE) Formulation with LS DYNA software. The results of numerical simulations agree with experimental data of Plasticine workpiece and the validity of the analysis method is confirmed.

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