Page 20 of Pressure Vessel News

Preventive Measures for Avoiding Damage to Pressure Vessels

Regular inspection and preventive measures for pressure vessels in chemical equipment are crucial to timely identify existing and potential equipment defects and hidden risks. This ensures a thorough assessment of vessel safety, enabling the elimination and monitoring of various hazardous factors. These practices not only reduce the likelihood of accidents involving pressure vessels in chemical equipment but also enhance their safe operation. 1. Mitigating Fatigue Damage Fatigue damage represents...

Dec 30, 2021 Industrial News

Factors Leading to Damage in Pressure Vessels

The operational environment of pressure vessels in chemical equipment is intricate, with corrosion, cracks, and deformations posing potential risks of severe injuries. Instead of focusing solely on post-damage treatment, greater emphasis should be placed on proactive prevention and control. This approach ensures the secure and stable functioning of chemical equipment pressure vessels, effectively extending their service life. Given the varied forms and causes of pressure vessel damage in chemical...

Dec 30, 2021 Industrial News

Efficient and Eco-Friendly Storage of Petrochemical Products

The petrochemical industry often faces higher pollution levels compared to other sectors, emphasizing the need for innovative strategies to enhance sustainability. Hydrocarbon compounds, particularly volatile liquid hydrocarbons, contribute to pollution during petrochemical product storage. Inadequate sealing can lead to significant volatilization issues, negatively impacting product quality and causing pollution. In response to the growing emphasis on energy conservation and emission reduction,...

Nov 30, 2021 Industrial News

Methods for Storing Liquefied Natural Gas

Liquefied natural gas (LNG) is a burgeoning clean energy source that has gained widespread adoption in China, driving the nation's LNG development. However, challenges in LNG storage have garnered attention, particularly with the escalating demand for natural gas in China. To ensure the secure and steady growth of LNG, it is imperative for relevant stakeholders to conduct a thorough analysis of current storage issues. Understanding the risk factors will enable the formulation of effective prevention...

Nov 30, 2021 Industrial News

Utilization of Radiation Refrigeration Coatings in Storage Tanks for Oil and Gas

Oil and gas storage tanks experience continuous heat accumulation at elevated temperatures, leading to a rapid increase in surface and internal temperatures. To address the issue of increased internal pressure due to high temperatures, frequent vent valve openings are necessary, exacerbating product loss and causing air pollution. Exceeding the critical internal pressure may even result in an explosion. Generally, the storage temperature for light boiling point oil in tanks should not exceed 45°C,...

Oct 05, 2021 Industrial News

Reliability Analysis for Seismic Performance of Large Storage Tanks

Large storage tanks play a crucial role in various industries such as petroleum, chemicals, and natural gas extraction, serving as vital components for storing strategic energy resources. Ensuring the safety and stability of these tanks is essential for the uninterrupted functioning of the national economy. Unforeseen events like earthquakes pose a risk of leakage in large storage tanks, resulting in immeasurable losses. To enhance the seismic performance of these tanks, researchers in China have...

Oct 05, 2021 Industrial News

What Constitutes the Inspection Scope for Heat Exchangers?

During various stages of the manufacturing process, inspectors assess the work and document the results of inspections for heat exchangers. The inspection scope for heat exchangers includes: 1. Identification and inspection of raw materials 2. Approval of the welding process completed on the test plate 3. Examination of welders' qualifications 4. Welding groove preparation, involving visual inspection of layering and penetration flaw detection 5. Verification of the quality of welding preparation...

Aug 19, 2021 Industrial News

Why is Water Pressure Testing Necessary After Overhauling the Heat Exchanger?

The purpose of conducting a pressure test after maintenance is to verify the heat exchanger's ability to safely withstand the design pressure, ensuring compressive strength, tightness, interface or joint quality, welding integrity, and sealing structure tightness. Additionally, the test allows for the observation of residual deformation in the base metal weld of the vessel and pipeline to identify any existing material problems promptly. Here is a brief description of the sequence and requirements...

Aug 05, 2021 Industrial News

Establishing the Maintenance Interval for Shell and Tube Heat Exchangers

How to establish the maintenance schedule for shell and tube heat exchangers? In alignment with the "Pressure Vessel Safety Technical Supervision Regulations" and considering the operational conditions of the enterprise, a comprehensive assessment suggests a typical maintenance cycle of 2 to 3 years. What are the maintenance criteria for shell and tube heat exchangers? (1) Extraction of the core, cleaning of the tube bundle, and shell. (2) Execution of welding and expansion procedures...

Jul 05, 2021 Industrial News

Identifying the Causes of Internal Leakage in Tubular Heat Exchangers

Causes of Internal Leakage in Tubular Heat Exchangers: 1. Corrosion, perforation, or breakage of heat exchange tubes. 2. Leakage due to corrosion and thinning of the nozzle. 3. Looseness in the expansion joint between heat exchange tubes and tube sheet. 4. Cracks, blowholes, or corrosion perforations at the welding place between tubes and tube sheet. 5. Loose or broken bolts in the small floating head. 6. Damage to the small floating head gasket. 7. Damage to the seal of the small floating head...

Jun 16, 2021 Industrial News

Repairing Leaky Heat Exchange Tubes

What are the situations leading to heat exchanger leakage? Heat exchanger leakage occurs due to cracks and perforations caused by corrosion, wear, scouring, assembly strain, tube defects, or significant wall thickness deviations. How to repair leaking heat exchange tubes? 1. Tube leakage at the nozzle is generally repairable, but internal tube sheet repair is not feasible. 2. If the number of leaking pipes is limited and blocked pipes suffice for production needs, conical metal plugging heads can...

Jun 01, 2021 Industrial News

Identifying the Primary Causes of Plate Heat Exchanger Failures

Under the combined influence of significantly high tube pass pressure and the differential temperature load in the large tube shell pass, the fixed tube sheet heat exchanger fails to meet strength requirements. To address the substantial temperature difference stress, an expansion joint is necessary, but it induces significant stress between the tube and tube sheet under high tube pass pressure, rendering it unable to meet strength conditions. Consequently, alternative heat exchange types, such...

May 17, 2021 Industrial News