For petroleum coke samples, the true density of the petroleum coke measured by the comprehensive method and the national standard GB/T6155-2008 method is not much different. This is because the infiltration liquid is the same and the evaluation result is also the case where the hole is not cracked. The use of the method for testing is equivalent to improving the quality of the insulation strip. The test results show that the heat insulation strips of different manufacturers can pass the test of the method, indicating that it is feasible to use the method specified in the new GB5237.6 standard for stress cracking test of the shaft nail. This can not only promote the improvement of product quality, but also comply with the requirements of international standards. Shaft nail stress cracking test can be used to test the adaptability of heat insulation strip during processing and use. During the test, attention should be paid to the state adjustment of the sample. At the same time, the center axis of the shaft nail hole should be perpendicular to the sample plane. The stress corrosion cracking test of the shaft nail was performed using a more severe corrosive medium and the test time was lengthened. However, the test result evaluation requirements did not change, that is, the quality requirements for the heat insulation strips were improved. The test results show that the requirements in the new version of the standard are achievable. With respect to the determination of the xylene density, the national standard uses the pycnometer volumetric method, and compared with the comprehensive method, the secondary error also occurs. The test result of the comprehensive method is very accurate. Compared with the national standard method, there is no case where there is a large deviation due to the secondary error. Therefore, the influence of the secondary error can not be considered. It reduces the amount of xylene and also solves the problem that the sample is difficult to infiltrate. It also ensures the precision and accuracy of the test results. It is suitable for both carbon materials and other materials such as fire-resistant materials. A wide range of test methods is worth promoting in the laboratory.
compare with other dsics remove material faster while reducing pitch build -up and cloqqing .the open top coat provides super4ior grit-to backing bond for extreme durability. sanding disc are ideal on wood ,matel and plaxtics
BRIEF INTRODUCTION
Henan Yuteng Grinding Material Co., Ltd. is located in Kaifeng City, Henan Province. Is a set of production, research and development, service as one of the grinding agent, grinding, polishing products professional company, specializing in the production and sales of coated grinding tools derived ancillary products: flocking sand disc, blade, all kinds of special-shaped grinding disc, sponge grinding block, steel paper disk, ring sand belt, sand ring and automotive polishing products.
Our main products are Velcro Disc,Abrasive Paper,Fiber Disc, Flap Disc ,Abrasive Cloth,Abrasive Belt.
Relying on the advantages of the industrial base, the company has advanced production equipment and strong technical force, complete testing equipment to ensure that the products are sharp, wear-resistant and high strength, and the product quality reaches the advanced level of similar international products.
Our products can be used for all kinds of metal watches and stainless steel, alloy steel, non-alloy steel, non-ferrous metals, titanium alloy and other grinding and wire drawing, polishing and so on; Wood, high-medium fiberboard, flower board, composite board, glass, rubber and other table grinding and polishing. Widely used in automobile, steel, building materials, shipping, aviation, wood, plastic, leather and other industries.
We provide customers with the best surface treatment program, according to the actual needs of customers "tailored" a variety of specifications of sand pan, sand belt, sand carbon and emery cloth ring polishing products.
The company's flexible operating mechanism and all customer-centric concept, we in addition to provide you standardized, serialized products, but also according to your special requirements, for you to manufacture high-quality, personalized non-standard coated with abrasive products.
E paper velcro disc Henan Yuteng Abrasives Co.,Ltd , https://www.henanyutengabrasives.com