Corrosion online monitoring is an important factor in the safety production and compliance of the company, which needs to solve the corrosion problem of the device in a targeted manner. For equipment corrosion, divided into high temperature corrosion sites and low temperature corrosion sites, the corrosion mechanism and corrosion behavior of these two kinds of corrosion are significantly different. In general, upgrading equipment materials is more cost-effective for corrosion protection at hot locations.
The corrosion protection of parts of the cold is more realistic and reasonable protection. Process preservatives must keep up with changes in the quality of crude oil and make the appropriate adjustments in a timely manner. Common practice at home and abroad are to establish a corrosion monitoring system, timely monitoring of media corrosion characteristics of indicators and changes, and these indicators are applied to the process of preservatives and dosage and other indicators of adjustment.
Island sewage six stations dosing device pipeline installation is not standardized, the use of PVC pipe, easy to distort the heat leakage, island Kansai and victory lump three, Tuo Liu and Ninghai sewage station, although the dosing cans, piping and metering pumps More standardized, but all the dosing points of the corrosion inhibitor added to the flow are manually preset, can not be quickly adjusted according to water quality changes in the amount of inhibitor filling, there is corrosion management lag.
The sewage station is commonly used is 44L / L or 125L / H diaphragm metering pump, voltage 380V, pump speed 144min-1, the discharge pressure of 0.6MPa. The motor is explosion-proof type (EXd IIBT4) three-phase asynchronous motor, the motor speed is 1390r / min, the voltage is 380V, the power is 0.55 kW ~ 1 KW. As the existing dosing system commonly used ordinary asynchronous motor can not be connected directly with the inverter can not achieve a wide range of motor speed control and metering pump dosing rate, it must be the existing asynchronous motor to a special frequency control Motor.
Pipeline corrosion management and evaluation software is a product with independent intellectual property rights and is adopted by the West-East Gas Pipeline. Is a pipeline corrosion data platform that collects data related to pipeline corrosion such as design, process, corrosion measurement and the surrounding environment of pipelines comprehensively, which provides a basis for pipeline corrosion status assessment and pipeline integrity management. Pipeline corrosion management and evaluation software has the Chinese version and the English version, and its Chinese version is based on China's pipeline standard design testing technology compiled pipeline corrosion assessment system.