Investigation on the Key Technologies of Mechanical Expanding of Large Diameter LSAW Pipe

2008 ◽  
Vol 575-578 ◽  
pp. 472-477
Author(s):  
Shu Hong Xiao ◽  
Chang Li Zha
Keyword(s):  
Large Diameter ◽  
Fem Simulation ◽  
Longitudinal Section ◽  
Steel Pipe ◽  
Long Distance ◽  
Long Distance Transmission ◽  
Transmission Pipeline ◽  
Oil And Natural Gas ◽  
Dispersed Material

Long distance transmission pipeline is one of promising transportation methods developed in recent years. It is safe, economical, convenient and prompt. It is mainly used in transmitting gas, liquid, and other dispersed material. Oil and natural gas is especially suitable to be transmitted by high pressure large diameter longitudinal submerged arc welded (LSAW) pipelines. Mechanical expanding is one of the most important processes in the production of large diameter LSAW steel pipe for long distance transmission pipeline. Firstly, the LSAW steel pipe mechanical expanding is modeled. Two FEM models are established to simulate the mechanical expanding process at the cross section and longitudinal section of the LSAW steel pipe respectively. Secondly, the deformation characteristics of the LSAW steel pipe are simulated while mechanical expanding processes. Finally, main mechanical expanding process parameters and their influence on the quality of finished LSAW pipe are analyzed in detail according to the FEM simulation. The results presented by the analyses are very consistent with the experiment, and can be used to direct the production of LSAW steel pipe.

Pressure Test Planning to Prevent Internal Corrosion by Residual Fluids

2012 ◽  
Author(s):  
Trevor Place ◽  
Greg Sasaki ◽  
Colin Cathrea ◽  
Michael Holm
Keyword(s):  
Structural Integrity ◽  
Large Diameter ◽  
Long Distance ◽  
Internal Corrosion ◽  
Pressure Testing ◽  
Practical Strategy ◽  
Leak Testing ◽  
Pressure Test ◽  
Transmission Pipeline ◽  
Pipeline Project

Strength and leak testing (AKA ‘hydrotesting’, and ‘pressure testing’) of pipeline projects remains a primary method of providing quality assurance on new pipeline construction, and for validating structural integrity of the as-built pipeline [1][2][3]. A myriad of regulations surround these activities to ensure soundness of the pipeline, security of the environment during and after the pressure testing operation, as well as personnel safety during these activities. CAN/CSA Z662-11 now includes important clauses to ensure that the pipeline designer/builder/operator consider the potential corrosive impacts of the pressure test media [4]. This paper briefly discusses some of the standard approaches used in the pipeline industry to address internal corrosion caused by pressure test mediums — which often vary according to the scope of the pipeline project (small versus large diameter, short versus very long pipelines) — as well as the rationale behind these different approaches. Case studies are presented to highlight the importance of considering pressure test medium corrosiveness. A practical strategy addressing the needs of long-distance transmission pipeline operators, involving a post-hydrotest inhibitor rinse, is presented.

Using International Trade Data for Evaluating the Product Specific Competitiveness and Supplied Product Quality of Countries: A Successful Example of Applied Theory

2006 ◽  
Vol 8 (2) ◽  
pp. 229 ◽  
Author(s):  
Thomas Cleff
Keyword(s):  
Product Quality ◽  
Longitudinal Section ◽  
Search Costs ◽  
Applied Theory ◽  
Present Level ◽  
Combined System ◽  
Trade Data ◽  
Simple Regression ◽  
Selection Of

This paper proposes a simple regression-based method for reducing the complexity of decisions in the international procurement process. Based on foreign trade data, the method uses indicators, which allow a product specific cross-section and longitudinal-section valuation of the international competitiveness and the supplied product quality of all potential supplier countries. The method thus provides a variety of information for procurement departments, including the present level and the dynamic of competitiveness and product quality for the potential supplier countries within every product group of the international product nomenclature (Combined System and the Harmonised System). Potential supplier countries --the companies of which have proven to be particularly competitive in the different product quality stages-- are identified. This pre-selection of countries enables the companies to limit their search for potential suppliers to the selected supplier countries. High search costs are subsequently reduced and trend prognoses can be constructed.

scholarly journals Short communication: Microbial quality of raw milk following commercial long-distance hauling

2015 ◽  
Vol 98 (12) ◽  
pp. 8572-8576 ◽  
Author(s):  
Emily M. Darchuk ◽  
Lisbeth Meunier-Goddik ◽  
Joy Waite-Cusic
Keyword(s):  
Short Communication ◽  
Raw Milk ◽  
Microbial Quality ◽  
Long Distance
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