SY/T 7499-2020 in English
VALIDRecommended practice for design and installation of on-line monitoring system for offshore centrifugal pump
- Issued on:2020-10-23
- Implemented on:2021-02-01
- File Format:PDF
- Delivery:Via email within 5 business days
$301.00
Introduction
Interpretation of the core content of the standard
SY/T 7499-2020 standard proposes full life cycle technical requirements for the online monitoring system of offshore centrifugal pumps, with a focus on standardizing:
- Layered distributed system architecture (sensor unit + data acquisition unit + host computer unit)
- Vibration acceleration sensor selection parameters (frequency response 0.5Hz-10kHz, linear range ±500m/s²)
- Typical measurement point layout scheme (double-branch type 9 measurement points/cantilever type 7 measurement points)
- Marine environment adaptability requirements (humid heat, salt spray, electromagnetic compatibility, etc.)
Key technologies of system design
| Technical modules | Core Requirements | Innovation Points |
|---|---|---|
| Data Acquisition | 24-bit AD resolution, single channel ≥51.2kHz sampling rate | Support full cycle sampling and transient process trigger sampling |
| Communication Architecture | RJ45/RS485 interface, MODBUS TCP protocol | Fiber optic communication is mandatory for distances > 100m |
| Diagnostic Function | Velocity spectrum/envelope spectrum analysis, fault feature library matching | Adaptive bandwidth remote transmission technology |
Installation and Implementation Points
Solutions to typical problems
Case 1: In a FPSO project, it was found that the adhesive base of the sensor fell off in a high temperature environment. After welding was used for installation according to Article 6.3.2 of the standard, the stability of vibration data collection was improved by 82%
Case 2: According to Article 5.4.2, the sensor layout angle was optimized to increase the sensitivity of axial vibration monitoring by 3 orders of magnitude
Analysis of standard evolution
Compared with early industry practices, this standard has the following highlights:
- Specified special requirements for offshore environment for the first time (GB/T 2423 series of tests)
- Introduced quantitative performance indicators of data collector (such as 24-bit AD resolution)
- Specified the original data retention period ≥ 3 years (Article 5.1.4.1)
Implementation suggestions
- Preferentially use the vibration evaluation method that complies with GB/T 29531-2016
- A 72-hour continuous stability test is required during the commissioning phase (Article 7.3.4)
- During acceptance, focus on checking the electromagnetic compatibility performance (Category 3 test items in Table 1)
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