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Material Selections for Cryogenic Pressure Vessel Design (Part Three)

Material Selections for Cryogenic Pressure Vessel Design (Part Three)

6. Cold Deformation: Affecting Steel Toughness   Cold deformation adversely affects the toughness of steel, leading to a reduction in low-temperature toughness due to strain aging and an elevation in the brittle transition temperature. Notch toughness becomes paramount for large pressure vessels during utilization, considering potential embrittlement from processes such as cold deformation, cold pressing, and welding deformation. Additionally, the implementation of low-temperature annealing...

May 05, 2019 Industrial News
Material Selections for Cryogenic Pressure Vessel Design (Part Two)

Material Selections for Cryogenic Pressure Vessel Design (Part Two)

2. Chemical Composition   In the realm of cryogenic pressure vessels, adjusting the carbon content plays a crucial role in influencing material brittleness and the brittle transition temperature of the pressure vessel. To enhance low-temperature steel resilience, it is recommended to keep the carbon content below 0.2%. A contemporary trend favors the utilization of low carbon (< 0.15%) or micro carbon (< 0.06%) steel for improved performance.   Manganese acts as a pivotal element,...

Apr 29, 2019 Industrial News
Material Selections for Cryogenic Pressure Vessel Design (Part One)

Material Selections for Cryogenic Pressure Vessel Design (Part One)

The intricate process of designing cryogenic pressure vessels revolves around the meticulous selection of materials, leading to a set of corresponding constraints in the realms of manufacturing and construction. Specifically, the steel designated for the pressure components of cryogenic pressure vessels must meet the criterion of being killed steel. The evaluation of material performance involves considering the allowable stress at normal temperatures, specifically at 20 °C, and adhering to...

Apr 25, 2019 Industrial News
Advancements and Challenges in China Pressure Vessel Industry (Part Two)

Advancements and Challenges in China Pressure Vessel Industry (Part Two)

2. Deformation Challenges   Deformation in pressure vessels poses significant threats to their reliability and operational safety. The meticulous formulation and strict adherence to manufacturing processes and standards are paramount to ensuring that the quality of pressure vessels aligns with national regulations and various industry standards. The occurrence of deformation during the manufacturing process can be attributed to errors in the size of the blank, issues in the assembly process,...

Apr 18, 2019 Industrial News
Advancements and Challenges in China Pressure Vessel Industry (Part One)

Advancements and Challenges in China Pressure Vessel Industry (Part One)

  With the rapid growth of China's economy and technological advancements, the landscape of pressure vessel manufacturing within the country has undergone significant transformations. From design to manufacturing and maintenance, pressure vessels produced in China have witnessed notable improvements, propelling them to the forefront of global standards. Over the past decade, China has demonstrated a commitment to excellence by establishing and refining a comprehensive set of laws, regulations,...

Apr 16, 2019 Industrial News
Pressure Vessel Failure Modes: Design and Risk Insights

Pressure Vessel Failure Modes: Design and Risk Insights

The occurrence of pressure vessel failure signifies a critical state wherein damage has reached a level where the strength, rigidity, or functional capacity of the vessel can no longer meet the stipulated usage requirements. The unraveling of the factors contributing to this failure involves understanding it as a gradual process influenced by external forces, such as mechanical stress, environmental conditions, and thermal effects. The manifestation of damage is characterized by the degradation...

Apr 03, 2019 Industrial News
Mastering Stainless Steel Welding Materials for Pressure Vessel

Mastering Stainless Steel Welding Materials for Pressure Vessel

Choosing the right welding materials for stainless steel is a crucial task, with each type – austenitic, ferritic, and martensitic – having its unique considerations. In this exploration, we'll break down the essential principles guiding this selection process. Our goal is to understand how to create welds that not only match but often outperform the base metal in terms of corrosion resistance and mechanical strength. Join us in unraveling the specifics of welding material choices...

Mar 22, 2019 Industrial News
Unveiling Categories and Challenges of Stainless Steel for Pressure Vessel

Unveiling Categories and Challenges of Stainless Steel for Pressure Vessel

The term "stainless steel" encompasses a fascinating realm of metallurgy, where the addition of a specific quantity of chromium transforms steel into a passivated state, rendering it impervious to rust. The alchemy of achieving this feat involves ensuring that the chromium content surpasses the pivotal threshold of 12%.   Beyond this foundational chromium infusion, the enhancement of steel passivation often involves a symphony of alloying elements, with nickel and molybdenum taking...

Mar 18, 2019 Industrial News
Comprehensive Pressure Vessel Inspection Guidelines

Comprehensive Pressure Vessel Inspection Guidelines

  This concise guide outlines crucial aspects of pressure vessel inspection, including external and structural assessments, geometric dimensions, surface defects, wall thickness measurements, material analysis, coating layer inspections, welding seam hidden defects, and scrutiny of safety accessories and fasteners. Follow these essential guidelines to ensure thorough and reliable inspections, contributing to the longevity and reliability of pressure vessel operations.   1. External Inspection:...

Mar 14, 2019 Industrial News
Non-Destructive Testing in Pressure Vessel Production (Part Three)

Non-Destructive Testing in Pressure Vessel Production (Part Three)

Non-Destructive Testing in Pressure Vessel Applications   Non-destructive testing (NDT) is a crucial aspect of evaluating pressure vessels, offering numerous advantages. However, it is essential to acknowledge the limitations of NDT and the necessity of combining it with destructive testing methods for a comprehensive assessment.   Integration of Destructive and Non-Destructive Testing   In the evaluation of pressure vessel equipment, it is imperative to compare and verify non-destructive...

Feb 15, 2019 Industrial News
Non-Destructive Testing in Pressure Vessel Production (Part Two)

Non-Destructive Testing in Pressure Vessel Production (Part Two)

4. Penetration Testing for Pressure Vessels   Process Unveiled: Initiates by coating the component surface with a penetrant containing fluorescent or coloring dye, allowing capillary action to facilitate penetration into surface defects. After removal of excess penetrant, an imaging agent is applied to attract retained penetrant in defects. Under a specific light source, the trace of penetrant at defects is displayed, unveiling defect appearance and distribution.   Its Major Characteristics...

Feb 14, 2019 Industrial News
Non-Destructive Testing in Pressure Vessel Production (Part One)

Non-Destructive Testing in Pressure Vessel Production (Part One)

In the contemporary era marked by technological strides, the evolving landscape of industry places heightened emphasis on product safety, quality assurance, and optimal performance. Within this paradigm, the utilization of non-destructive testing (NDT) technology emerges as a cornerstone, wielded strategically in both the manufacturing and deployment phases of pressure vessel products. In the following paragraphs, the common Non-Destructive methods for Pressure Vessel will be discussed.   Common...

Feb 13, 2019 Industrial News