Definition of cement type
(1) Cement: Mixing water into a plastic slurry, which can be cemented with sand, stone and other materials that can be hardened in air and hardened in water.
(2) Portland cement: a hydraulic cementitious material made of Portland cement clinker, 0%~5% limestone or granulated blast furnace slag, and appropriate amount of gypsum, called Portland cement, divided into PI And P.II, known as Portland cement abroad.
(3) Ordinary Portland cement: a hydraulic cementitious material made of Portland cement clinker, 6%~15% mixed material and appropriate amount of gypsum, called ordinary Portland cement (referred to as ordinary cement) , code: PO.
Sulphoaluminate cement (4) Slag Portland cement: a hydraulic cementitious material made of Portland cement clinker, granulated blast furnace slag and appropriate amount of gypsum, called slag Portland cement, code: PS.
(5) Volcanic ash Portland cement: a hydraulic cementitious material made of Portland cement clinker, pozzolanic mixed material and appropriate amount of gypsum. It is called pozzolanic Portland cement, code: PP.
(6) Fly ash Portland cement: a hydraulic cementitious material made of Portland cement clinker, fly ash and appropriate amount of gypsum, called fly ash Portland cement, code: PF.
(7) Composite Portland cement: a hydraulic cementitious material made of Portland cement clinker, two or more kinds of mixed materials and appropriate amount of gypsum, called composite Portland cement (abbreviated as Composite cement), code PC.
(8) Medium-heat Portland cement: a hydraulic cementitious material with moderate hydration heat prepared by adding appropriate amount of Portland cement clinker and adding appropriate amount of gypsum.
(9) Low-heat slag Portland cement: a hydraulic cementitious material with low hydration heat prepared by adding appropriate amount of Portland cement clinker and adding appropriate amount of gypsum.
(10) Fast-hard Portland cement: Add appropriate amount of gypsum from Portland cement clinker, and grind it to make cement with high early strength and 3 days compressive strength.
(11) Sulfate-resistant Portland cement: Cement made of Portland cement clinker and added with appropriate amount of gypsum, which is resistant to sulfate corrosion.
(12) White Portland cement: A white cement made by grinding a fine amount of gypsum from a Portland cement clinker with a small amount of iron oxide.
(13) Road Portland cement: a hydraulic cementitious material made of road Portland cement clinker, 0%~10% active mixed material and appropriate amount of gypsum, called road Portland cement, Road cement).
(14) Masonry cement: It is made of active mixed materials, adding appropriate amount of Portland cement clinker and gypsum, and grinding to make low-grade cement mainly used for masonry mortar.
Oil well cement
(15) Oil well cement: Portland cement clinker composed of appropriate minerals, appropriate amount of gypsum and mixed materials, etc., which are suitable for oil and gas well cementing engineering under certain well temperature conditions.
(16) Gypsum slag cement: granulated blast furnace slag as the main component material, adding appropriate amount of gypsum, Portland cement clinker or lime milled cement.
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Site Selection for Mass Flow Meter Installation
a) Sensor stays away from mechanical vibration source, for example, pump. Use flexible pipe to connect meter with pipeline if inevitable. The housing of meter must be standalone, out of touch with any other device. There must be 3 times the size of sensor between 2 sensors if there are many flow meters on the same pipeline, to avoid resonance.
b) Do not install sensor on pipeline that easily expands with hot and contracts with cold, especially near expansion joint, which leads to a worse stability.
c) Sensor stays away from industrial electromagnetic field, such as large generator and transformer, better 5m at least. Such device influences the performance of drive coil and pickoffs. Make sure magnetic field intensity less than 400A/m.
d) Sensor shall be installed on lower pipeline, to be easily full of fluid.
e) Make sure Ex-mark meet application requirements if in hazardous area.
f) Build a sunshade if the meter is under direct solar radiation. g) Keep the meter from corrosive liquid.
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