Assuring Tube-to-Tubesheet Joint Tightness and Strength

2011 ◽  
Author(s):  
Stanley Yokell
Keyword(s):  
Pressure Vessel ◽  
Shear Load ◽  
Load Testing ◽  
Visual Examination ◽  
Intended Purpose ◽  
Digital Microscope

This paper describes preparing mockup tubesheet specimens for visual examination using a digital microscope to determine that tube joint welds are of the specified size and that expanded joints are satisfactory for the intended purpose. It discusses nondestructive examinations (NDE) of tubesheets and tube joints intended to assure achieving sufficient tightness and strength to satisfy the uses to which the exchangers will be put. The paper refers to the ASME Boiler and Pressure Vessel Code (Code) paragraphs that apply to tube joint welds and expanded joints including shear load testing when the Code requires it.[1] The discussion also addresses the need for manufacturers to have qualified tube joining procedures and personnel who use the procedures. The work concludes with a summary of ways to assure tube joint tightness and strength.

Assuring Tube-to-Tubesheet Joint Tightness and Strength

2012 ◽  
Vol 134 (6) ◽  
Author(s):  
Stanley Yokell
Keyword(s):  
Pressure Vessel ◽  
Shear Load ◽  
Load Testing ◽  
Visual Examination ◽  
Intended Purpose ◽  
Digital Microscope

This paper describes preparing mockup tubesheet specimens for visual examination using a digital microscope to determine that tube-to-tubesheet joint welds are of the specified size and that expanded joints are satisfactory for the intended purpose. It discusses nondestructive examinations (NDE) of the tubesheets and tube joints intended to assure achieving sufficient tightness and strength to satisfy the uses to which the exchangers will be put. This paper refers to the ASME Boiler and Pressure Vessel Code (Code) paragraphs that apply to tube joint welds and expanded joints including shear load testing when the Code requires it [1]. The discussion also addresses the need for manufacturers to have qualified tube joining procedures and personnel qualified to use the qualified procedures. The work concludes with a summary of ways to assure tube joint tightness and strength.

Shear load testing of hollow core slabs

2016 ◽  
pp. 1084-1091
Author(s):  
G. Schacht ◽  
G. Bolle ◽  
St. Marx
Keyword(s):  
Shear Load ◽  
Load Testing ◽  
Hollow Core

Making Sense of Section XI Visual Examination Requirements

2002 ◽  
Author(s):  
N. Roger Bentley
Keyword(s):  
Pressure Vessel ◽  
Visual Examination ◽  
Physical Damage ◽  
Making Sense ◽  
Visual Rules ◽  
Physical Displacement ◽  
Resolution Requirements

This paper will review the development of the visual examination requirements of Section XI of the ASME Boiler and Pressure Vessel Code. The original visual requirements were ‘one visual exam fits all’ – to detect physical damage, physical displacement, and evidence of leakage. Resolution requirements were those of Section V of the Code. These requirements evolved over the next 20 years to become several specific types of requirements, each with specific resolution, illumination, and proximity restraints. Review indicated that these separate visual rules are now converging. This paper provides recommendations for revisions to Section XI that consolidate and simplify these requirements.

scholarly journals A Quality Study of a Self-Piercing Riveted Joint between Vibration-Damping Aluminum Alloy and Dissimilar Materials

2020 ◽  
Vol 10 (17) ◽  
pp. 5947
Author(s):  
Dong Hyuck Kam ◽  
Taek Eon Jeong ◽  
Jedo Kim
Keyword(s):  
Aluminum Alloy ◽  
Failure Modes ◽  
Mechanical Performance ◽  
Dissimilar Materials ◽  
Vibration Damping ◽  
Shear Load ◽  
Load Testing ◽  
Tensile Shear ◽  
Reinforced Plastic ◽  
Riveted Joints

This study investigates the quality of self-piercing riveted joints between vibration-damping aluminum (Al) and other dissimilar materials, namely aluminum alloy (AL5052-H32), steel alloy (GA590DP), and carbon-reinforced plastic (CFRP). The effects of die types (flat, cone, and nipple) on the geometrical characteristics and mechanical performance of the joints are studied using a cross-section examination and tensile shear load testing. The failure modes of each joint are also presented, showing the nature of the forces leading to the joint failures. The results indicate that, for all configurations, adequate joining between vibration-damping Al with AL5052-H32 is expected with a maximum shear load up to 3.28 kN. A shear load up to 3.6 kN was measured for the joints with GA590DP panels with acceptable top and bottom seal characteristics. A vibration-damping Al panel can only be positioned at the bottom when riveting with CFRP due to the brittle nature of CFRP. A tensile shear load up to 2.26 kN was found, which is the lowest amongst the materials tested in this study.

Full-Scale Cyclic Rotation and Shear-Load Testing of Double Web with Top and Seat Angle Beam-Column Connections

2020 ◽  
Vol 146 (8) ◽  
pp. 04020164
Author(s):  
Thierry Béland ◽  
Robert Tremblay ◽  
Eric M. Hines ◽  
Larry A. Fahnestock
Keyword(s):  
Full Scale ◽  
Shear Load ◽  
Load Testing ◽  
Seat Angle

Measurement of Sustained-Load Cracking Thresholds for Steels in Hydrogen Delivery and Storage

2008 ◽  
Author(s):  
K. A. Nibur ◽  
B. P. Somerday ◽  
C. San Marchi ◽  
D. K. Balch
Keyword(s):  
Stress Intensity ◽  
Pressure Vessel ◽  
Threshold Stress ◽  
Crack Arrest ◽  
Sustained Load ◽  
Threshold Stress Intensity ◽  
Load Testing ◽  
Line Pipe ◽  
Threshold Stress Intensity Factor ◽  
Assisted Fracture

Threshold stress intensity factors at crack arrest have been measured for three commercial low alloy pressure vessel steels, SA372 grade J, DOT 3AAX and DOT 3T as well as X100 line pipe steel using sustained load testing. Testing conditions were consistent with the recently published Article KD-10 from Section VIII, Division 3 of the ASME Boiler and Pressure Vessel Code. Measured threshold values for these steels suggest a higher resistance to hydrogen-assisted fracture than previously expected, however some improvements to the methodology of Article KD-10 may be required to ensure conservative results are measured. Specifically, conservative measurements of threshold stress intensity factor for hydrogen-assisted fracture cannot be determined without crack propagation.

THE STUDY OF THE PROCESS OF ASSESSING THE STATE OF WOODEN STRUCTURES

2020 ◽  
Vol 12 (4) ◽  
pp. 10-16
Author(s):  
Svetlana Galaeva ◽  
S. Nikolenko ◽  
Svetlana Sazonova
Keyword(s):  
Structural Damage ◽  
The State ◽  
Visual Examination ◽  
Visual Method ◽  
Saratov Region ◽  
Intended Purpose ◽  
Main Development ◽  
Technical Solutions ◽  
Wooden Structures

The process of evaluating wooden structures, which is gaining great popularity these days, is examined. In view of the fact that the main development of the countryside took place during the Soviet era, by our time, wooden structures of the last century have become unusable and cannot be used for their intended purpose. The results of a visual examination of wooden structures of the feldsher-midwife station located in s. Lopatino, Saratov region. All wooden structures of the object were examined, measurements of the found damages were made. During the examination, a visual method with photo fixation was used. The analysis of the terrain in which the object is located, in order to more accurately obtain the result of the origin of the identified damage. The types of studies considered, as well as their assessment, can be used for surveys of other buildings with similar structural damage. The conducted studies will help to be used as one of the options for technical solutions necessary for the reconstruction of the facility.

Shear load testing of damaged hollow-core slabs

2017 ◽  
Vol 18 (4) ◽  
pp. 607-617 ◽  
Author(s):  
Gregor Schacht ◽  
Steffen Marx ◽  
Guido Bolle
Keyword(s):  
Shear Load ◽  
Load Testing ◽  
Hollow Core

scholarly journals REMAINING LIFE ASSESSMENT DAN KASUS LAJU KOROSI PADA LPG STORAGE TANK KAPASITAS 50 TON

2020 ◽  
Vol 1 (2) ◽  
pp. 96-106
Author(s):  
Amam Fachrur Rozie
Keyword(s):  
Pressure Vessel ◽  
Storage Tank ◽  
Life Assessment ◽  
Remaining Life ◽  
Non Destructive Testing ◽  
Visual Examination ◽  
Destructive Testing ◽  
Working Pressure ◽  
Remaining Life Assessment ◽  
Non Destructive

LPG Storage Tank berkapasitas 50 Ton yang telah terinstalasi dan beroperasi sejak tahun 2010 akan dikaji kelayakan dan sisa umur pakai dari pressure vessel tersebut. Metode pengujian yang dipergunakan adalah Non-Destructive Testing (NDT) - Ultrasonic Testing (UT) pada bagian shell dan head untuk mendapatkan nilai actual thickness dari pressure vessel serta dilakukan Visual Examination. Nilai thickness tersebut dipergunakan untuk menganalisis dan mengkalkulasi thickness required (Treq), nilai Corrosion Rate (CR), Maximum Allowable Working Pressure (MAWP) serta umur sisa (Remaining Life) dari LPG Storage Tank tersebut. Dari hasil analisa serta perhitungan maka didapat umur sisa pakai dari LPG Storage Tank kapasitas 50 Ton adalah 18 tahun dengan nilai laju korosi sebesar 0,043 mm/thn

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