Development of JWES Standard WES7700 for Repair Welding of Pressure Equipment

2013 ◽  
Author(s):  
Takayasu Tahara ◽  
Takahisa Hoshika ◽  
Eiichi Yamamoto ◽  
Takushi Murakami ◽  
Keisuke Shiga ◽  
...  
Keyword(s):  
Fem Analysis ◽  
Fillet Welds ◽  
Repair Welding ◽  
Engineering Society ◽  
Pressure Tests ◽  
Welding Procedure ◽  
Experimental Pressure

The Japan Welding Engineering Society (JWES) published the guideline for repair welding of pressure equipment, CP-0902 in 2009. Considering the regal approval of each repair welding procedure for pressure equipment, JWES WES7700 has been also published in 2012. This paper summarizes the contents of WES7700 along with a verification of repair welding procedures such as minimum required grind out thickness for thermal removal of flaws, minimum required throat thickness of fillet welds for patched plates by experimental pressure tests and FEM analysis and some comparison of the requirements of several stamdards for repair weldings.

Repair Welding Procedure for P460NH Grade Steel Making Ladles

2018 ◽  
Vol 51 (2) ◽  
pp. 57
Author(s):  
P. Ashok Kumar ◽  
Nikhil Shajan ◽  
Kanwer S. Arora ◽  
M. Shome
Keyword(s):  
Repair Welding ◽  
Steel Making ◽  
Welding Procedure ◽  
Grade Steel

Guidelines for Repair Welding of Pressure Equipment in Refineries and Chemical Plants: Part 2—Repair Welding Method

2011 ◽  
Author(s):  
Keisuke Shiga ◽  
Yukio Hirai ◽  
Ogayu Yasushi
Keyword(s):  
Chemical Plant ◽  
Chemical Plants ◽  
Safe Operation ◽  
Research Committee ◽  
Repair Welding ◽  
Welding Method ◽  
Engineering Society

It has been recognized that repair welding plays an important role of in the long term, safe operation of pressure equipment. In 2009, the Japan Welding Engineering Society (JWES) published guidelines for repair welding of pressure equipment, to meet the great need for the safe operation and proper maintenance of aging plants. This paper gives brief descriptions of three types of repair welding method, “Flaw excavation and repair welding”, “Butt-welded insert plates”, and “External fillet welded patches”, which welding methods are based on Chemical Plant Welding Research Committee of JWES.

An Experimental Testing of Fillet Welded Specimens

2015 ◽  
Vol 752-753 ◽  
pp. 412-417 ◽  
Author(s):  
Martin Krejsa ◽  
Jiri Brozovsky ◽  
David Mikolasek ◽  
Premysl Parenica ◽  
Libor Zidek ◽  
...  
Keyword(s):  
Numerical Modelling ◽  
Stress Analysis ◽  
Numerical Models ◽  
Experimental Testing ◽  
Fem Analysis ◽  
Experimental Tests ◽  
Strength Characteristics ◽  
Fillet Welds ◽  
Commercial Software

The paper describes the experimental tests of steel bearing elements, which were aimed at obtaining material, geometric and strength characteristics of the fillet welds. Preparation of experiment consisted in defining of numerical models of tested samples using FEM analysis and the commercial software ANSYS. Data obtained from described experimental tests are necessary for further numerical modelling of stress analysis of steel structural supporting elements.

Development of Repair Welding Guidelines on Pressure Equipment

2008 ◽  
Author(s):  
Eiichi Yamamoto ◽  
Yasuhiro Hara ◽  
Tukasa Okazaki ◽  
Takayasu Tahara ◽  
Fumiyoshi Minami
Keyword(s):  
Current Status ◽  
Repair Welding ◽  
Engineering Society

Responding to the needs of petroleum and chemical industries, the Japan Welding Engineering Society has been working to establish guidelines to repair welding of pressure equipment in petroleum and chemical industries. This paper describes the current status of the activity for developing the guidelines.

Guidelines for Repair Welding of Pressure Equipment in Refineries and Chemical Plants: Part 4—Weld Repair for Specific Materials - Stainless Steel, Clad Steel and Dissimilar Joints

2011 ◽  
Author(s):  
Tsukasa Okazaki ◽  
Rinzo Kayano ◽  
Takahisa Hoshika ◽  
Shinta Niimoto
Keyword(s):  
Stainless Steel ◽  
Chemical Plants ◽  
Safe Operation ◽  
Weld Repair ◽  
Dissimilar Joints ◽  
Weld Overlay ◽  
Repair Welding ◽  
Engineering Society ◽  
Clad Steel

It has been recognized that repair welding plays an important role in the long term, safe operation of pressure equipment. In 2009, the Japan Welding Engineering Society (JWES) published guidelines for repair welding of pressure equipment to meet the great need for the safe operation and proper maintenance of aging plants. This paper describes Part 4 of the guideline, which covers repair welding of stainless steel, clad steel, weld overlay and dissimilar joints.

scholarly journals FEM Analysis of the Welding Seams Geometry in Case of Fillet Welds

2021 ◽  
Vol 343 ◽  
pp. 03006
Author(s):  
Claudiu Babiş ◽  
Andrei Dimitrescu ◽  
Ana Maria Alecusan ◽  
Marcela Babiş
Keyword(s):  
Weld Seam ◽  
Welding Process ◽  
Fem Analysis ◽  
Geometric Shape ◽  
Fillet Welds ◽  
Mechanical Resistance ◽  
Filler Materials ◽  
Welding Seam ◽  
Welding Regime ◽  
Materials Used

The role of the welding seam is to achieve the non-removable joint between two or more parts. In principle, three geometric profiles of the welding seams can be obtained: straight profile; concave profile and convex profile. In practice, this geometric shape of the weld seam profile is very important, both in terms of the resistance of the joint to static stresses and in terms of its fatigue life. There are many factors that can influence the geometric shape of the weld seam: the welding process; welding regime; the nature of the filler materials used, the rehabilitation techniques applied and others. Often, this geometric shape of the weld bead is neglected, which is particularly dangerous due to the fact that an improper geometric shape can generate low mechanical strength in static loads or poor fatigue strength in variable loads. An optimum of the geometric configuration of the welding must be found, which reconciles both situations: the mechanical resistance in case of static stresses and also the fatigue resistance in case of variable loads. In this paper, an analysis will be made with finite elements for the straight and convex profile of the welding seams in the case of fillet welds subjected to fatigue. Several elements will be considered such as: damage; total deformation; fatigue sensitivity versus loading history; equivalent von Misses stress; safety factor.

Guidelines for Repair Welding of Pressure Equipment in Refineries and Chemical Plants: Part 6—Material Degradation and Repair Welding

2011 ◽  
Author(s):  
Tomoaki Kiso ◽  
Rinzo Kayano ◽  
Eiki Nagashima ◽  
Yasuhiro Hara
Keyword(s):  
Chemical Plants ◽  
Material Degradation ◽  
Safe Operation ◽  
Damage Mechanisms ◽  
Repair Welding ◽  
Engineering Society ◽  
Key Points ◽  
Damaged Materials

It has been recognized that repair welding plays an important role in the long term, safe operation of pressure equipment. In 2009, the Japan Welding Engineering Society (JWES) published guidelines for repair welding of pressure equipment, to meet the great need for the safe operation and proper maintenance of aging plants. This paper addresses the key points of repair welding for damaged materials, based on JWES’s guidelines. The various factors to be considered before implementing repair welding and typical methods of repair welding for the major damage mechanisms are summarized.

3D Measurement and FFS Assessment for LTA in Pressure Equipment According to WES2820:2015

2016 ◽  
Author(s):  
Takayasu Tahara ◽  
Yoshiharu Shimura ◽  
Minoru Niimura
Keyword(s):  
Optical Measurement ◽  
Fem Analysis ◽  
Assessment System ◽  
Assessment Procedure ◽  
3D Measurement ◽  
Process Industries ◽  
Engineering Society ◽  
3D Optical Measurement ◽  
Maintenance Activities ◽  
Corrosion Under Insulation

The corrosion of pressure equipment such as corrosion under insulation, CUI, is the most common problem in refinery and petrochemical plants in recent years. Fitness-For-Service, FFS, assessment technologies for pressure equipment have been studied in recent 15 years, and standardization of a FFS assessment procedure for local thin area, LTA, has been expected by maintenance engineers of process industries. Based on the verification using extensive burst tests and FEM analysis of LTA, the Japan Welding Engineering Society, JWES, developed new FFS standard WES2820 in June 2015.[1] This paper presents high lights of WES2820 and a FFS assessment system consisted with 3D optical measurement method and FFS software for LTA in pressure equipment as a new tool for effective inspection and reliable maintenance activities.

scholarly journals Experimental Study Regarding the Influence of Welding Parameters on the Mechanical Behaviorof High Density Polyethylene Pipes

2021 ◽  
Vol 57 (4) ◽  
pp. 209-215
Author(s):  
Ibrahim Ramadan ◽  
Maria Tanase
Keyword(s):  
Experimental Study ◽  
High Density Polyethylene ◽  
Experimental Tests ◽  
High Density ◽  
Fusion Welding ◽  
Welding Parameters ◽  
Visual Examination ◽  
Polyethylene Pipes ◽  
Pressure Tests ◽  
Welding Procedure

The experimental study conducted for this article was made using the butt fusion welding procedure for high density polyethylene (HDPE) pipes. PE100 (SDR 17, PN 10) water pipes were used, as for the experimental study parts of around 200 to 300 mm were welded, using different welding parameters. The influence of the welding parameters on the pipes resistance was analyzed, through visual examination and experimental tests such as tensile, bending and pressure tests.

Guideline for Repair Welding of Pressure Equipment in Refineries and Chemical Plants: Part 5—Repair Welding for Specific Materials - Heat Resistance Alloy and Non-Ferrous Metals

2011 ◽  
Author(s):  
Hirohisa Watanabe ◽  
Keisuke Shiga ◽  
Atsushi Ohno
Keyword(s):  
Heat Resistance ◽  
Chemical Plants ◽  
Repair Welding ◽  
Engineering Society ◽  
Ferrous Metals ◽  
Resistance Alloy ◽  
Nickel Copper ◽  
Key Points ◽  
Non Ferrous Metals

It has been recognized that repair welding takes an important role in the long term, safe operation of pressure equipment. Responding to the needs in petroleum and chemical industries, the Japan Welding Engineering Society (JWES) published Guideline for repair welding of pressure equipment at 2009. This paper describes the key points of repair welding for heat resistance alloy and non-ferrous metals such as Nickel, Copper, Titanium and their alloys, based on JWES’s guidelines. Before implementing repair welding, it is important to understand the features of damaged materials, because these materials have been used at severe environment in plants.

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