Key Points and Precautions for Chemical Industry Supervision and Acceptance
Chemical engineering project supervision and acceptance is a crucial step in ensuring the quality of construction, mainly including the following aspects:
I. Key Acceptance Items
Quality Compliance Inspection
Based on GB50461 "Code for Acceptance of Construction Quality of Petrochemical Engineering Construction Projects," we focus on checking the installation accuracy of equipment (verticality ≤ 1‰), pipeline welding quality (X-ray detection pass rate ≥ 95%), and anti-corrosion engineering thickness (≥ 90% of the design value). Conduct random checks on the airtightness test results of pressure vessels, with a requirement for a leakage rate of ≤ 0.5%/h.
2. Safety and Environmental Protection Special Inspection
Verify explosion-proof level certification (ExdIIBT4 or higher) for electrical equipment in explosion-proof areas, and safety valve calibration reports (pressure trip error ≤ 3%). Check VOCs collection efficiency (≥90%), operation parameters of wastewater treatment facilities (COD ≤ 100mg/L), and draft chemical supervision report for acceptance. Ensure compliance with HJ2045 standard for chemical wastewater treatment.
3. System Integration and Debugging
Conduct a full-process 72-hour trial run, monitoring critical parameter deviations (±2℃ for temperature, ±5% for pressure). Record operating indicators such as equipment vibration (≤4.5mm/s) and bearing temperature (≤75℃), and compile a chemical supervision report to ensure production capacity exceeds 85% of the design capacity.
II. Requirements for Acceptance Management
Implement the "Three Inspections and Four Determinations" system
Through design review, construction review, and document review, establish corrective measures, responsible parties, completion deadlines, and acceptance criteria for identified issues. Establish a problem closure ledger, aiming for a 100% corrective action closure rate.
2. Multi-party coordination mechanism
Establish an acceptance team comprising construction, supervision, design, construction, and inspection units, utilizing the 'on-site inspection + data verification + meeting review' approach. The confirmation of key equipment acceptance requires the presence of technical personnel from the manufacturer.
Section 3: Document Management Standards
Organize 28 types of technical documents, including completed construction drawings, material quality assurance certificates (including MSDS), and inspection reports. The supervisor's log should comprehensively record data for the acceptance of 345 key processes, forming a traceable electronic档案 system.
The supervisory unit must strictly adhere to the SH/T3903 standard, issue rectification notices for any不合格 items found during acceptance, compile chemical supervision reports in Jiangxi, and only after rectification and re-inspection are deemed合格 can the acceptance certificate be signed, ensuring the implementation of lifelong responsibility for the quality of construction projects.
Which petrochemical supervision service is the best?
The selection of petrochemical engineering supervision requires a comprehensive consideration of corporate qualifications, industry experience, technical strength, and service reputation. Below are several recommended domestic supervision units, along with selection suggestions:
Domestic Tier Supervision Enterprises
China Petrochemical Engineering Construction Corporation (SEI)
Directly affiliated with Sinopec, holding comprehensive engineering supervision qualifications, with over 60 years of experience supervising more than 2,000 petrochemical projects, including billion-dollar projects like Zhenhai Refining & Chemical Co. and Hainan Refining & Chemical Co. Boasts over 1,200 registered supervising engineers, and its independently developed digital supervision platform has won the National Science and Technology Progress Award.
China Global Engineering Group Co., Ltd.
China National Petroleum Engineering Corporation, with qualifications in petrochemical engineering supervision, boasts technical expertise in supervising LNG receiving stations and ethylene cracking units. The '3D Visualization Supervision System' achieved a 98.7% first-time acceptance pass rate for the processes in the 1.2 million tons/year ethylene project at Guangdong Petrochemical.
China Chengda Engineering Co., Ltd.
"National team in the chemical industry, holding over 35% market share in supervision of urea and other coal chemical projects. Their主编ed 'Petroleum and Chemical Engineering Supervision Specification' has become an industry standard, and they have undertaken supervision for over 30 international projects abroad, including the Kazakhstan Petrochemical Industrial Park."
Selection Strategy Recommendations
Small to medium-sized projects (under 1 billion) may consider provincial institutions like Sinopec Nanjing Engineering Company, a chemical supervision report writing organization, with supervision fees typically ranging from 0.8% to 1.2%. For large and complex projects, it is recommended to choose top-tier companies like SEI, although the rate of 1.5% to 2% is higher, it can effectively control quality risks. For international projects, consider forming a joint supervision body with foreign companies like Fluor and Bechtel.
Recommend key review items: ①CSDA supervision qualification system record; ②recent three years' supervision performance on similar projects; ③percentage of certified team members (should be >70%). Clearly define HSE management clauses and agree on quality traceability and breach of contract liability in the contract signing.
Below is a template for a petrochemical engineering supervision report (about 400 words), for your reference:
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Petroleum Engineering Supervision Report
**Project Name**: XX Petrochemical Annual XX Hundred Thousand Tons Ethylene Expansion and Reconstruction Project
**Supervision Phase**: Civil construction and equipment installation phase (XX month - XX month, 2023)
**Report Date**: XX/XX/2023
**I. Project Overview**
This phase of the project primarily includes the ethylene cracking unit area, storage tank area, and the construction of the associated pipeline galleries, with approximately 65% of the total progress completed. So far, the foundation pouring for the units, the main welding of three 100,000 cubic meter storage tanks, and 80% of the process pipeline prefabrication have been completed. Equipment installation is now in the debugging phase.
**Section II: Supervision Work Content**
Quality Control
- Completed material acceptance for 58 batches, inspected 12 batches of welding materials, anti-corrosion coatings, etc., with a pass rate.
- Oversee non-destructive testing (RT/UT) of 236 tank welds, with a first-pass pass rate of 98.2%, and repaired areas have been re-inspected and meet standards.
The installation accuracy (circularity, levelness) of the dynamic equipment has deviations lower than the required values of the specifications.
2. **Progress Management**
- Coordinated resolution of 3 design changes (trench bracket optimization, electrical grounding adjustment) without causing delay to the critical path.
Urgently request the construction unit to increase night shift teams for operations, reducing the insulation work period for the storage tanks by 7 days.
3. **Safety Management**
- Conducted 6 special inspections, identifying 17 hazards including lack of high-altitude work protection and inadequate ventilation in confined spaces, with a correction rate.
Implement high-risk job JSA analysis and PTW system, aiming for a 'zero incident' target this month.
**Section 3: Issues and Recommendations**
Partial installation of process pipeline supports and hangers is behind schedule. It is recommended that the construction unit optimize resource allocation to ensure synchronization with the pressure testing plan.
2. Insufficient warning signs in the cross-operations area; need to enhance isolation measures and personnel briefings.
**IV. Key Focus for the Next Phase**
Strictly control the quality at critical points such as alignment adjustment of compressor units and pressure testing of high-pressure pipelines.
2. Strengthen the review of the trial run plan and the risk pre-control for联动 debugging.
**Supervisory Unit**: XX Engineering Supervision Co., Ltd.
**Chief Project Engineer**: XXX
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**Description:**
1. The report should integrate specific project data, focusing on quality, safety, progress control measures, and actual results.
2. Problem analysis should be targeted, with suggestions for clear operability.
3. Terms (such as RT/UT, JSA, etc.) must comply with petrochemical industry standards.
4. Additional attachments such as drawing review records, material inspection forms, etc., can be supplemented as per actual requirements.
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