The method is suitable for measuring the density of liquid paints, varnishes and the like in a specified temperature. The principle is to first calibrate the volume of the pycnometer using the density of the distillation disperser water, and then use the pycnometer to weigh the sample at a certain temperature. Further, the density of the sample is calculated based on the mass and volume of the sample.
2, instruments and materials
(1) Gravity cylinders, common pycnometers are 37ml, 50ml and 100ml, generally stainless steel "target=_blank> stainless steel or aluminum alloy. The shape of the pycnometer is as shown.
(2) The thermometer is indexed at 0.1 ° C, accurate to 0.2 ° C
(3) The water bath or the constant temperature chamber can be maintained within the range of ±0.5 °C of the test temperature if the accuracy is high, and can be maintained within the range of 0.2 °C for the production control.
(4) Analytical balance Requires high precision, accurate to 0.2mg.
3. Measurement method (1) Calibration of pycnometer This requires drying a solvent-clear metal pycnometer without leaving a residual flow meter after evaporation.
The pycnometer was placed at room temperature and then weighed. If high precision is required, the pycnometer can be continuously clear, dried and weighed until the difference between two successive weighings does not exceed 0.5 mg. At a test temperature of 23 ± 2 ° C, if the accuracy is higher, the pycnometer is filled with distilled water at a temperature of 23 ± 0.5 ° C and no more than 1 ° C.
Cover the pycnometer so that it has an overflow opening, and strictly guard against the bubbles generated in the pycnometer.
Place the pycnometer in a constant temperature water bath or in a constant temperature chamber until the temperature of the bottle contains a constant temperature of the bar coater. Wipe off the spilled fingers with an absorbent material and dry the outside of the pycnometer with an absorbent material to ensure that no spills will flow out. Weigh the pycnometer filled with tinplate distilled water immediately, 0.001% of the exact mass
note:
1. When directly operated by hand, the pycnometer will increase the temperature and cause more overflow of the overflow of the overflow agitator, and will leave fingerprints. Therefore, it is recommended to protect the hand with pliers and dry absorbent material to operate the pycnometer.
2. It is recommended to immediately weigh the filled pycnometer to minimize the loss of quality.
(2) Calculation of the volume of the pycnometer The solvent of the pycnometer is calculated by the formula (in ml)
For more information on [Painted Gravity Cup], please visit: http://
Http://news.chinawj.com.cn Editor: (Hardware Business Network Information Center) http://news.chinawj.com.cn
Short Radius Elbow refers to that the radius of curvature is 1 times of the elbow pipe diameter,also referred to as 1D.
Elbow push hot forming process is the use of special elbow pushing machine, mandrel and the heating device, so that pushing pipe raw material to forward movement in the mold set, be heated in motion, expanding and bending forming process. Elbow push hot deformation characteristics of tube diameter is determined according to the law of constant volume before and after deformation of the metal material, use smaller diameter than the diameter of the elbow, through mandrel to control the deformation process of the blank, to other parts of the compensation due to thinning of the diameter expands, thereby obtaining a uniform wall thickness of the elbow.
| Product Name:Short Radius Elbow |
| Size:DN10-DN2500 |
| Materials: A234 WBP-WP1-WP12-WP11, A403 WP 304-304L-316-316L, A402 WPL3-WPL 6,A860 WPHY 42-46-52-60-65-70,PG370,C20 |
| Thickness: 2mm-100mm |
| Standard:GB/ANSI/ GOST/ JIS/ DIN |
| Crafts: Butt, Push System, Simmer |
| Connection: Welding |
| Package: Wooden boxes,Wooden pallets,According to customer requirements. |
| Brand Name: HY |
| Place of Origin: China (Mainland) |
| Certification: ISO.UKS.SGS.BV |
| Application: Chemical, Water, Oil and gas, Electricity |
Short Radius Elbow
Short Radius Elbow,Short Radius,Stainless Steel Short Radius Elbow,Pipe Elbow Radius
CANGZHOU HAOYUAN PIPE FITTINGS MFG CO.,LTD , https://www.pipefitting-china.com