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AUTOMATION OF SPOOL WELDING

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This paper presents basic information on fusion welding processes used to weld pressure pipes. More specifically, it looks at the technical improvements of the past 20 years. It details the changes to the GMAW process achieved when Lincoln Electric Company introduced the STT GMAW approach, which revolutionized the industry. It then explains how this new GMAW process allowed welding shops to achieve root pass penetration and fusion that rivaled those achieved with GTAW but with much higher productivity and far less experienced welders. The STT also facilitated the automatization of pressure pipe welding. We will show the impact on quality and productivity for carbon steel. This paper results from reviewing several research articles and from shop experiments performed in a welding shop in Hamriyah Free Zone UAE

Product Number: MPWT19-14394

Author: Majed Al Sinan, Pierre Lefebvre

Publication Date: 2019

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51320-ALL-Summer 2020 Digital Proceedings Papers

Product Number: 51320-ALL-SG

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Performance of Coatings in Seawater: A Field Study

Product Number: 51393-93439-SG

Author: A. Beitelman, v. L. Van Blaricum, A. Kumar

Publication Date: 1993

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Various polymeric coatings have been exposed to natural saltwater environments in Buzzard' s Bay, MA and at La Costa Island, FL for the last 18 years and 21 years respectively. The coating systems were applied to 8 inch (20.32 cm) by 8 inch (20.32 cm) by 40 feet (12.19 m) A36 steel "H" pilings. The depth of the water ranged from 4 feet (1.22 m) to 8 feet (2.44 m). Periodic visual inspections have been conducted to evaluate the performance of the coating/ primer systems in the splash zone and in the immersed zone. The coatings had windows to evaluate the under film corrosion attack by saltwater present near the Cape Cod canal. The coatings were evaluated according to ASTM visual standards at low tide. Results of the coating inspections and an evaluation of their effectiveness in preventing the corrosion of steel pilings in seawater will be presented.

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51393-069-Prediction of CO2 Corrosion of Carbon Steel

Product Number: 51393-069-SG

Author: C. de Waard, U.Lotz

Publication Date: 1993

$20.00

Various aspects of the mechanism of C02 corrosion are reviewed, together with a discussion about the validity of a number of simplifications which can be used with models for predicting the corrosion rate. A "worst case" rate can often be predicted. To this end a number of parameters has been identified, the

influence of which has to be accounted for. The effects of protective corrosion product layers and of dissolved corrosion product on pH needs to be included in the prediction. More quantitative information about the effect of flowpattern and flowrate is needed. For wet gas pipelines, the prediction of the effect of injection of glycol as a measure against corrosion is of special interest. Predictive models consisting of a system of rules and equations can be conveniently developed in computer spreadsheets.

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AUTOMATION OF SPOOL WELDING

51320-ALL-Summer 2020 Digital Proceedings Papers

Performance of Coatings in Seawater: A Field Study

51393-069-Prediction of CO2 Corrosion of Carbon Steel

Association for Materials Protection and Performance