A method of qualimetric evaluation of the processes of automatic orbital welding

2006 ◽  
Vol 20 (5) ◽  
pp. 395-404
Author(s):  
S I Poloskov ◽  
V A Erofeev ◽  
A V Maslennikov
Keyword(s):  
Orbital Welding

Development of technologies and equipment for orbital welding and repair of pipelines in space

2018 ◽  
Vol 24 (4) ◽  
pp. 41-50
Author(s):  
L.M. LOBANOV ◽  
◽  
E.A. ASNIS ◽  
E.G. TERNOVOI ◽  
V.F. SHULYM ◽  
...  
Keyword(s):  
Orbital Welding

Mechanical Properties Comparison of Stainless Steel 304L and Carbon Steel BS1387 Prior to Orbital Welding

2015 ◽  
Vol 761 ◽  
pp. 79-82
Author(s):  
Mohamad Nizam Ayof ◽  
Z.M. Noh ◽  
N.I.S. Hussein
Keyword(s):  
Mechanical Properties ◽  
Stainless Steel ◽  
Carbon Steel ◽  
Steel Pipe ◽  
Base Materials ◽  
Orbital Welding ◽  
Plant Chemical ◽  
Higher Temperature ◽  
Welding Processes ◽  
Temperature Water

Dissimilar metal joint (DMJ) is one of many joining methods for welding processes which is common in the power plant, chemical and petrochemical industries. Stainless steel pipe and carbon steel pipe are the most widely used in this technique. In order to perform DMJ to these metals, it is important to understand the mechanical properties of both base materials. In this study, the characterizations of stainless steel (SS) 304L and carbon steel (CS) BS1387 were made. The SS 304L and CS BS1387 were cut out from pipes according to ASTM E 8M-04, before their tensile and microhardness properties were measured and evaluated. The results show that the SS 304L has better mechanical properties compared to the CS BS1387 pipe in terms of tensile strength and hardness. Due to the higher mechanical properties, SS 304L was selected to conduct higher temperature water, while CS BS1387 was selected to conduct room temperature water.

Analysis of factors determining the formation of the weld pool in the orbital welding of non-rotating joints in pipes

2003 ◽  
Vol 17 (7) ◽  
pp. 557-564
Author(s):  
S I Poloskov ◽  
Yu S Ishchenko ◽  
V A Bukarov
Keyword(s):  
Weld Pool ◽  
Orbital Welding

High Purity Process Piping: Addition of Chapter X High Purity Piping to the ASME B31.3 Process Piping Code

2012 ◽  
Author(s):  
Barbara K. Henon ◽  
Dennis Cobb
Keyword(s):  
High Purity ◽  
Semiconductor Industry ◽  
Chemical Processing ◽  
Fabrication Technology ◽  
Normal Fluid ◽  
Processing Industry ◽  
Safety Requirements ◽  
Orbital Welding ◽  
Process Piping ◽  
American Society

The 2010 Edition of the American Society of Mechanical Engineers (ASME) B31.3 Procecess Piping Code [1] includes a new chapter: Chapter X High Purity Piping. Chapter X covers industries listed in the scope of ASME B31.3 which use methods of fabrication, examination, inspection and testing different than other industries covered by the Code. Industries which have a need for cleanness and cleanability on a more demanding level, such as the semiconductor industry, which uses Semiconductor Equipment and Materials International (SEMI) Standards [2–4], and the pharmaceutical and bioprocessing industries, which use the ASME Bioprocessing Equipment (BPE) Standard [5], also reference ASME B31.3 for safety requirements. ASME B31.3 now addresses issues common to the semiconductor and biopharmaceutical industries. The new High Purity Fluid Service defined in Chapter X permits weld coupon examination in lieu of the 5% radiography required in Normal Fluid Service when orbital welding is used in fabrication. Industries that may not otherwise be considered as high purity, such as refineries, the chemical processing industry [6–7], solar panel fabrication and nuclear or petrochemical applications that could use tubing rather than pipe, may benefit from the fabrication technology introduced in Chapter X while meeting the safety requirements of the Code.

scholarly journals Results of implementation of orbital welding in manufacture and repair of thin-wall pipelines

2017 ◽  
Vol 2017 (9) ◽  
pp. 48-51
Author(s):  
P.D. Zhemanyuk ◽  
◽  
I.A. Petrik ◽  
S.L. Chigilejchik ◽  
◽  
...  
Keyword(s):  
Thin Wall ◽  
Orbital Welding

scholarly journals Automatic Control of the Weld Bead Geometry

2020 ◽  
Author(s):  
Guillermo Alvarez Bestard ◽  
Sadek Crisostomo Absi Alfaro
Keyword(s):  
Automatic Control ◽  
Dynamic Models ◽  
Welding Process ◽  
Industrial Applications ◽  
Weld Bead ◽  
Bead Geometry ◽  
Single Input Single Output ◽  
Control Loops ◽  
Orbital Welding ◽  
Estimation And Control

Automatic control of the welding process is complex due to its nonlinear and stochastic behavior and the difficulty for measuring the principal magnitudes and closing the control loop. Fusion welds involve melting and subsequent solidification of one or more materials. The geometry of the weld bead is a good indicator of the melting and solidification process, so its control is essential to obtain quality junctions. Different sensing, modeling, estimation, and control techniques are used to overcome this challenge, but most of the studies are using static single-input/single-output models of the process and focusing on the flat welding position. However, theory and practice demonstrate that dynamic models are the best representation to obtain satisfactory control performance, and multivariable techniques reduce the effect of interactions between control loops in the process. Also, many industrial applications need to control orbital welding. In this chapter, the above topics are discussed.

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