Pre-Production Mechanical & Electrical Drawing Risk Audit

Drawing Audit Before Production to Eliminate Design Defects & Avoid Rework

Most jamming, interference, leakage and unstable operation of custom automation machines and petrochemical complete plants stem from early drawing flaws.

Our mechanical and electrical engineers have rich experience in custom equipment design and factory implementation, as well as practical experience in petrochemical pressure equipment drawing review. We conduct in-depth full drawing audit before production and objectively record unreasonable structures, design blind spots, logic loopholes and selection risks.

For structural defects, inappropriate component selection and violations of explosion-proof/pressure vessel codes shown on drawings, we compile complete drawing optimization and revision plans, communicate with equipment designers on site, and fully archive all communication records and their adjustment schedules. All drawing modification plans shall be confirmed solely by you before any changes are made.

You can identify all design hazards before manufacturing investment, fundamentally avoiding large-scale rework, modification and delivery delays.

Mechanical Drawing Inspection Focus

1. Inspect frame strength, rigidity, load capacity and long-term vibration risks; check bearing strength and wall thickness of petrochemical tanks and pressure vessels

2. Simulate motion paths to predict interference and jamming; audit layout of chemical pipelines and rationality of thermal expansion compensation structures

3. Verify matching of profiles, bearings and drive motors; check grade selection of heads, flanges and fasteners for pressure equipment

4. Audit tolerance reservation, assembly clearance and manufacturing feasibility; verify complete marking of welding grooves and NDT zones on drawings

5. Record impractical structures beyond actual processing capacity; check alignment of special equipment drawings with pressure vessel codes

6. Archive hidden risks for assembly, maintenance and spare part replacement; audit layout of manholes, drains and maintenance openings on petrochemical equipment

Electrical Drawing & Program Inspection Focus

1. Record irregularities in electrical schematics, terminal layout and wiring standards; verify compliance of electrical selection for explosion-proof chemical areas

2. Detect conflicts and loopholes in IO distribution, equipment interlock and start-stop logic; calibrate safety interlock logic for pressure and temperature of petrochemical plants

3. Record PLC logic defects and missing safety protection functions; review emergency stop, overpressure and overtemperature protection programs

4. Verify matching of sensors, drivers and low-voltage electrical components; audit selection of explosion-proof transmitters and pressure sensors

5. Archive drawing omissions, insufficient wiring reserve and commissioning risks; inspect explosion-proof wiring and grounding design for flammable & explosive environments