Custom equipment quality appraisal

customized equipment is based on the core principle of non-standard design and functional adaptation collaboration. By optimizing design compliance, material performance (such as corrosion resistance/high temperature resistance indicators) and process stability, it achieves equipment functional integrity, operational reliability and safety compliance. It is widely used in chemical industry, metallurgy, new energy and special manufacturing fields. In the customization of high-temperature reactors, it is used for collaborative design of pressure resistance and corrosion resistance; in the semiconductor industry, it meets the dust-proof requirements of transmission systems in clean room environments; in special equipment, it ensures strict compliance with explosion-proof/radiation protection functions. Compared with standard equipment, customized equipment has the characteristics of design file traceability, modular expansion and full life cycle data management, and is the core carrier of solutions for special working conditions.

Zhongke Testing is a product quality appraisal service organization registered with the court. It can provide customized equipment quality appraisal services. It has a professional appraisal team and advanced instruments and equipment to provide fair and accurate appraisal results for customized equipment quality appraisal.

As the demand for non-standard customization grows, related dispute cases have increased significantly. The judicial dispute focuses on:

1, performance index dispute: actual production capacity is not up to standard, key parameters are out of tolerance;

2, material defects: deviation of special alloy composition, insufficient medium resistance of seals;

3, process problems: the welded joints are not fused, the thickness of the surface treatment layer is less than the agreed value;

4, contract performance disputes: the design documents are inconsistent with the delivered equipment (such as the lack of safety interlocking function), third-party certification has not passed (such as ATEX explosion-proof certification invalid).

1. Appearance inspection of the equipment

The appraiser will first inspect the appearance of the equipment to see if there are any obvious damage, deformation, rust or other problems. Appearance inspection can initially determine whether the equipment has been affected by external impact or adverse environment during transportation, installation or use.

2, performance test

In accordance with the requirements of the technical contract and relevant standards, various performance indicators of the equipment are tested. For example, for production equipment, test its production efficiency, processing accuracy, product quality, etc.; for electrical equipment, test its electrical performance, power, insulation resistance, etc. Through performance testing, determine whether the equipment can meet the expected usage requirements.

3, Reliability Assessment

A chemical factory of the applicant signed a "High Temperature Chlorination Reactor Procurement Contract" with an equipment manufacturer of the respondent, stipulating that the corrosion resistance rate of chloride ions is ≤0.1mm/year. Six months after it was put into use, the depth of pitting corrosion on the inner wall reached 1.2mm. The manufacturer argued that it was caused by the operating temperature exceeding the limit.

Identification analysis results:

The quality analysis expert group discussed and comprehensively analyzed the relevant information of "customized equipment", contract technical agreements, on-site inspection case materials and other data, and made the following quality analysis opinions:

The reactor lining of the customized equipment involved in the case was lined with Hastelloy The Mo content of C22 material is only 12.5% (agreement ≥13%), the intergranular corrosion depth in the welding area is 0.3mm; the temperature sensor calibration deviation is +15°C, and the actual operating temperature exceeds the agreement value by 50°C.

The appraisal conclusion determined that defects in material composition and temperature control system were the main causes of corrosion.

Customized equipment quality appraisal report should include:

1, appraisal purpose (such as contract dispute attribution, functional verification) and reference standards;

2, involved equipment model, design documents, acceptance records;

3, testing method and equipment list (such as light spectrometer, pressure test bench);

4, analysis of the correlation between test data and failure (such as the influence of Mo content on corrosion resistance);