Questions about crude oil measurement?

The main technical documents required for oil metering include tank calibration certificates, calibration certificates for measuring instruments, as well as documents such as measurement methods and operating procedures. Certificate of Qualification for Metrologists
I. Relevant Terms
Metrology: Activities aimed at achieving uniform and reliable measurements. Petrochemical metrology includes dynamic and static metrology.
I. Relevant Terms
Reference height ( ); Actual measuring rod ( )
II. Mandatory Calibration of Measuring Instruments
Calibration cycle; Oil gauge (depth-measuring steel tape). Structure of the oil gauge (as shown in the figure). Allowable error: The total length error of a meter stick is… Thermometer (fully immersed mercury thermometer); Division value or maximum allowable error. Precision requirements for densitometers. Auxiliary tools: Insulation box, sampler. Auxiliary materials: Oil testing paste, water testing paste.
III. Procedures for Measuring Heights
Preparatory work: Wear appropriate personal protective equipment. Check that all measuring instruments and reagents are in good condition. Wait until the liquid level has stabilized fully before proceeding. Determine the reference height of the oil tank as well as the approximate height of the liquid level.
III. Procedures for Measuring Heights
Steps for measuring heights. The measurement should be carried out at least twice; if the positive and negative errors between the two measurements exceed a certain value in millimeters, the measurement must be repeated. Water level gauge: The method is basically the same as that for the solidness gauge; keep the gauge weight in place for about a few seconds before lifting the gauge. IV. Temperature measurement procedures: Location for measuring the temperature of vertical tanks. IV. Temperature measurement procedures: Duration of temperature measurement – at least minutes for light products, at least minutes for lubricants; at least minutes for heavy products. IV. Temperature measurement procedures: Steps for temperature measurement – select an appropriate thermometer and place it in the temperature measurement box, extending it from the gauge opening down to the area where the temperature is to be measured. Wait until the liquid level is fully stable; after staying in the tank for the specified time, remove it quickly and take immediate readings. First read the decimal part and then the whole number. The temperature must be measured accurately and recorded. V. Sampling procedure…

Measure it with a water gauge! Apply the test paste! But generally, no measurement is taken; the crude oil is subjected to enhanced dehydration to reduce the moisture content at the bottom!

There are two methods: 1. Measure the water level at the bottom of the tank, which should not exceed 300 millimeters, using a water level gauge. Attach this gauge to the oil level gauge; a very thin layer of water-indicating paste should be applied to the gauge, or one or more strips of water-indicating paper can be attached vertically using clips. Bring the water level gauge and the oil level gauge’s scale close to the reference point, and lower them into the container until they make light contact with the measurement point. Then pull the gauge out, observe the indicated water level, and record it. If a clear reading of the water level cannot be obtained after the first attempt to submerge the gauge, it is necessary to remove the water-indicating paste or paper that has been used. Before taking the next measurement, the water level gauge should be dried and used immediately. When measuring the water level in opaque oils, the oil on the surface of the wetting paste or wetting paper must be removed with a solvent before taking a reading. It is necessary to use methods that do not alter the water level reading, as well as solvents that do not interact with the wetting paste or wetting paper. When using a wetting paste in heated opaque oils, its membrane tends to soften and flow; in such cases, wetting paper should be used instead. 2. Measure the water level at the bottom of the tank using a dipstick. Apply a thin layer of water-level indicator paste at the approximate position of the water level on the dipstick, or use clips to hold one or more water-level papers vertically. Bring the dipstick close to the reference point and lower it into the container against the wall of the measuring opening until it makes light contact with the measurement point; then observe the indicated water level and record it.

I’ve learned about it. It’s the first time I’ve heard of a pH test strip