List of Scientific Research Projects of the Company:

Serial number Scientific research project content Entrusted unit Scientific research time

1. Research on ultrasonic height, length, positioning, and qualitative testing of pressure vessel defects, independently conducted by the company from 1986 to 1988

2. Research and preparation of provisional method for defect safety assessment in nuclear equipment acceptance; subject of National Nuclear Safety Administration 1987-1989

3 Development and application of new acoustic emission (AE) dynamic detection technology Shanghai Petrochemical General Works 1986-1995

Technical Guidance on Ultrasonic Testing Methods for 428 Heat Exchanger Equipment, Rubber Factory of Yuehua General Factory, 1987-1988

Experimental Study on the Safety of 5 Ultra High Pressure Crystal Reactor at Wuhan Casting and Forging Factory from 1992 to 1993

Research on the Application Technology of Quick Inspection and Evaluation of Butt Welds in in-service Pressure Pipelines at Anqing Petrochemical Plant from 1994 to 1996

AE Detection and Self enhancement Comprehensive Analysis of 7 Polyethylene Ultrahigh Pressure Reactor at Lanzhou Petrochemical Plant from 1997 to 1999

Development and Development of 8 Lithium Processing Machines Yuehua General Factory 1994-1995

9. New Technology Tackling Project for Quantitative Inspection and Evaluation of Pressure Pipelines in Service, Sinopec Corporation Project 1998-2000

Research on Stress Corrosion Cracking Technology for the Outer Wall Inspection and Evaluation of Pressure Vessels in 10 Reactors System Guangzhou Petrochemical Plant 1999-2000

Experimental Research and Failure Analysis of 11 Inner Wall Stress Corrosion Crack Inspection and Evaluation Techniques at Jiujiang Petrochemical Plant from 2000 to 2000

Application of achievements:

1、 Small Frontal Tile Line Focused Ultrasonic Sensor

Mainly using the tiled line focusing method to overcome the scattering of sound beams from thin-walled tubes to improve detection sensitivity; Using a small front to detect defects in one wave scan; Enable the sensor to have narrow echo pulses to improve resolution, and control the initial wave width within 2.5mm to accurately locate defects in 3.5mm thin-walled pipes; Improve wedge design and material selection to reduce clutter and ensure sensor stability; Adopting new chip materials to improve detection sensitivity, increasing chip backing damping to increase focusing effect and resolution, etc., resulting in a 20dB increase in probe sensitivity; Not only can it achieve the detection of small diameter thin-walled pipes, but also achieve high accuracy up to± Within 0.5mm, achieve fixed height, fixed length, positioning, and qualitative analysis in engineering applications; Four fixations” Requirements.

2、 Low frequency modulated magnetic detector for pipelines

In response to the skin effect of AC magnetic field and the inability of magnetic particle particles in DC magnetic field to film, a DPM-1 low-frequency modulation magnetic instrument specifically designed for direct AC pipelines has been developed. After being powered on, it can detect surface and internal defects in the entire weld seam of the pipeline within 2 seconds Ф Pipelines below 108mm can detect defects with burial depths of 5-8mm, achieving convenient, fast, and intuitive detection.

3、 Calculation of Pipe System Stress and; Weak Ring” Analysis provides four major functions:

a. Provide various quantitative stress data for quantitative comprehensive evaluation.

b. Focusing on high stress and weak ring areas for spot checks, making the spot checks scientific and reasonable.

c. Provide suggestions for reasonable pipeline layout.

d. Provide a basis for pipeline failure analysis.

4、 Technological breakthroughs in the detection of regenerators, settlers, cyclones, and flue gas pipelines.

Our company adopts" Ultrasonic Quantitative Evaluation Technology for Inner and Outer Wall Cracks; The research results have quantitatively detected stress corrosion cracks on the inner wall. After quantitative comprehensive evaluation, those who pass will be put into production immediately. Those who do not pass will undergo partial dismantling of the inner turtle shell mesh for welding and repair. This has created a direct economic benefit of 3.2925 million yuan for the quantitative inspection and evaluation of the regenerator, settler, triple rotation, and flue gas pipeline in the heavy catalytic workshop of Guangzhou Petrochemical. The indirect benefit is 16 million yuan.

5、 Digital ultrasonic automatic detection of furnace tubes

The digital ultrasonic testing crawler for furnace tubes is mainly used for ultrasonic testing and evaluating the service life of heating furnace tubes, HK40, HP40 material hydrogenation conversion furnaces, and fertilizer primary furnace tube base materials. It also uses a longitudinal wave line focused ultrasonic probe to quantitatively detect defects in problematic areas and blind spots of crawler testing.

In order to solve the problem of qualitative and quantitative detection technology for furnace tube damage, in recent years, Anhui Huaxia High tech Development Co., Ltd. has concentrated its research and development efforts to develop a digital furnace tube ultrasonic automatic detection system. It has also conducted automatic climbing detection on the fire facing surface of several heating furnace conversion furnace tubes, evaluated and reported the current quality level of the inspected furnace tubes based on five levels: A, B -, B, B+, and C; For the pipe sections with B-grade and C-grade detected by climbing pipes, a newly developed dual crystal focused ultrasonic probe with corresponding specifications and frequencies was used for manual re inspection, attempting to qualitatively and quantitatively determine the location of damage cracks and achieving results; The welding seam area, the pipe section 0.5~1.0M away from the bottom of the pipe, and the bend area were also manually inspected with focused ultrasonic probes of corresponding specifications and frequencies, and results were also achieved in quantitative, qualitative, and positioning.

After ultrasonic tube climbing inspection, it is determined to be a B+or C-grade tube (which has been quantitatively and qualitatively tested with a specially designed probe) for one sampling (or a sample tube that has been replaced with a B+or C-grade tube by another enterprise's tube climbing inspection). In addition to routine metallographic, crack analysis, scanning electron microscopy, energy spectrum analysis, and normal and high temperature mechanical performance measurements, the sample also needs to undergo X-ray diffraction analysis of corrosion products to evaluate the degree of oxidative corrosion damage; Based on the operation and operation records, the quantitative data collected above and the Thermal shock, thermal fatigue analysis, and the evaluation of the damage degree caused by carburization and oxidation, the preliminary evaluation of the remaining life of the furnace tubes is given quantitatively.

6、 Safety integrity inspection and evaluation technology for buried steel pipelines

Joint development of rapid and accurate positioning and flaw detection equipment for buried pipeline leakage points, and promotion of engineering testing. At the same time, it can also evaluate the depth, direction, GPS identification, anti-corrosion layer testing, soil resistance testing, cathodic protection situation, stray current evaluation, corrosion rating, and overall buried pipeline comprehensive evaluation technology of buried pipelines, which have been inspected and accepted by China and Anhui Huaxia Company; Eleventh Five Year Plan; The scientific research achievements of the Science and Technology Support Program "Research and Demonstration of Key Technologies for Lifeline Engineering and Special Equipment Safety Guarantee" provide a detailed introduction to the non excavation detection method system for buried steel pipelines based on pipeline safety integrity theory. Targeted detection and evaluation methods are proposed for different failure mechanisms and modes to ensure the safe operation of pipelines.