2021-10-15 Steel World Comments Off on Application of Rotary Valve in Refining and Chemical Equipment
1. The characteristics of rotary valves. Valves are usually divided into two categories: linear and rotary. The straight-stroke valve allows or cuts off the flow of material through a linear movin...
2021-10-15 Steel World Comments Off on Hot-dip galvanized steel sheet for household appliances
Traditional steel used in the production of household appliances is mainly electro-galvanized steel. In recent years, with the continuous improvement of the mechanical properties and surface quality o...
2021-10-15 Steel World Comments Off on Understanding the significance of valve characteristics
In the fluid piping system, the valve is the control element, and its main function is to isolate the equipment and the piping system, adjust the flow, prevent backflow, adjust and drain the pressure....
2021-10-15 Steel World Comments Off on What are the types of stainless steel development
Stainless steel usually refers to steel that can resist corrosion in the atmosphere or some chemical media. According to the characteristics of the structure, it can be divided into five categories: m...
2021-10-15 Steel World Comments Off on Rare earth has broad prospects in the application of steel coatings
“The application prospect of rare earth in steel and metal product coatings is very broad, and the potential market is extremely huge. We should speed up research and development, promot...
2021-10-15 Steel World Comments Off on Modern degaussing measures before Russian pipeline welding
The modern degaussing method before Russian pipeline welding is compiled by Xu Guizhi (Nanjing Aviation Accessories Factory 210002). The reason for the remanence in steel pipe and its influence on wel...
2021-10-15 Steel World Comments Off on Research on beneficiation technology of ilmenite in a certain place
Guangxi Bama Tianrun Titanium Industry Co., Ltd. is located in Bama County, Guangxi. It is a well-known ilmenite deposit in western Guangxi and even in China. The ilmenite deposit in this area has bee...
2021-10-15 Steel World Comments Off on What are the iron ore tailings application technology
Tailings are waste after beneficiation, and the main component of industrial solid waste. According to incomplete statistics, more than 10 billion tons of tailings and waste rocks are discharged every...
2021-10-15 Steel World Comments Off on Corrosion-resistant alloy cold-rolled drawn seamless pipe (GB/T15011-1994)
(1) For dimensions and specifications, see Table 8-54. Table 8-54 Dimensions and specifications of corrosion-resistant alloy cold-rolled (drawn) seamless pipe (mm) Wall thickness diameter (2) The allo...
2021-10-15 Steel World Comments Off on Discuss how to ensure the quality of NdFeB permanent magnet materials in the production of “four defenses” work
The sintered NdFeB permanent magnet material is manufactured by powder metallurgy. The process flow is as follows: raw material processing → batching → smelting → powder making → magnetic field orient...
2021-10-15 Steel World Comments Off on Introduction to the specification of surface condition of stainless steel at home and abroad
Specification , , Routing , , main content , , , , NO.1 , , Hot rolling, annealing, descaling , , After hot rolling to a specified thickness, it is then annealed and descaled. Usually used in industri...
2021-10-15 Steel World Comments Off on What is tungsten?
Tungsten is a silver-white metal with a melting point as high as 3400. C; Tungsten has high hardness, high density and good high temperature strength. Tungsten is mainly used in the production of ceme...
2021-10-15 Steel World Comments Off on Summary of Globe Valve Specifications
standard encdoing Standard Chinese name Standard English name DL/T531-1994 (reviewed in 2005) Technical conditions of high temperature and high pressure stop valve and gate valve for power station GB/...
2021-10-15 Steel World Comments Off on Talking about combined cooling and heating and water source heat pump in residential areas in northern China
1 Introduction According to statistics, as of the end of 2000, the country’s annual construction area was 36 billion square meters, of which 7.3 billion square meters in urban areas were mostly re...
2021-10-15 Steel World Comments Off on YG20C tungsten steel mechanical properties and characteristics application,
YG20C tungsten steel advanced molding material. Without heat treatment, the inner and outer hardness is uniform. Used for mass production. YG20C tungsten steel is suitable for the production of cold h...
2021-10-15 Steel World Comments Off on What is spiral submerged arc welded pipe
Spiral submerged arc welded pipe standard Submerged arc welded pipe GB/T 9711.1 SY/T 5037, 5040 API 5L ISO 2604/VI TOCT 20295 ASTM A134, A139, A211, A252, A381 JIS G3444, G3457 DIN EN10208-2 Note: Acc...
2021-10-15 Steel World Comments Off on The influence of front guide vane adjustment on the function of water pump and its use control
Abstract: The second phase of the water diversion project of the upper reaches of the Huangpu River in Shanghai used 12 large vertical mixed-flow pumps, all of which were equipped with an Inlet Vane C...
2021-10-15 Steel World Comments Off on The difference between ordinary asynchronous motor and variable frequency motor
1. The influence of the frequency converter on ordinary asynchronous motors 1. The efficiency and temperature rise of the motor 2. The insulation strength of the motor 3. Harmonic elec...
2021-10-15 Steel World Comments Off on The difference between ordinary asynchronous motor and variable frequency motor
In recent years, with the rapid development and widespread application of information technology represented by computers and network communications, both concepts and technologies in the manufacturin...
2021-10-14 Steel World Comments Off on Types of valves in the chemical industry
Types of valves in the chemical industry 1 Ball Valve (Ball Valve) When the operating temperature is between -29oC and 200oC, most manual (opening and closing) ball valves are suitable for the operati...
2021-10-14 Steel World Comments Off on The difference between submersible pumps and centrifugal pumps
Submersible pump A very versatile water treatment tool. The difference from ordinary pumps is that they work underwater, while pumps mostly work on the ground. The working principle of the submersible...
2021-10-14 Steel World Comments Off on Discussion on ideological and political construction under the reform of water management system
With the continuous deepening and development of the reform of the water management system, the understanding of the Yellow River employees is constantly changing, and some traditional concepts are al...
2021-10-14 Steel World Comments Off on Technical Code for Construction Drainage Rigid Polyvinyl Chloride Pipeline Engineering (3)
4 There is a warehouse for stacking materials on the construction site, which can meet the needs of construction. 4.1.2 During the entire construction process of the floor structure, the reserved hole...
2021-10-14 Steel World Comments Off on What is the difference between Q195, Q215, Q235, Q255 and Q275
What is the difference between Q195, Q215, Q235, Q255 and Q275 in terms of materials? To Carbon structural steel is the most widely used and the largest quantity of steel. It is often rolled into stee...
2021-10-14 Steel World Comments Off on Commonly used machinery industry standards Chinese-English comparison table (2)
41 GB/T 5660-1985 End-suction centrifugal pumps-Baseplate and installation dimensions End-suction centrifugal pumps-Baseplate and installation dimensions 42 GB/T 5661-1985 Cavity dimensions for mechan...
2021-10-14 Steel World Comments Off on Reasonable selection of valves
The gate valve is used as a cut-off medium, and the whole flow is straight when it is fully opened. At this time, the pressure loss of the medium is minimal. Gate valves are usually suitable for worki...
2021-10-14 Steel World Comments Off on The difference between hot work die steel and cold work die steel
The high thermal conductivity of steel can reduce the degree of heating of the surface metal of the mold, thereby reducing the thermal fatigue tendency of the steel. It is generally believed that the ...
2021-10-14 Steel World Comments Off on Techniques and Methods of Geological Prospecting of Iron Ore
1. Geological exploration types of iron ore and the density of prospecting projects In iron ore geological prospecting, prospecting projects are used to control ore bodies in accordance with economic ...
2021-10-14 Steel World Comments Off on Research on the introduction of iron powder components into the forming process
The raw materials used in this test is the iron powder supplied by Wotai Company. In this test, three types of iron powder are used: <75Lm (-200 mesh) atomized iron powder, <50Lm (-300 mesh) ato...
2021-10-14 Steel World Comments Off on The difference between the nominal diameter and outer diameter of pipe fittings
It is called nominal diameter, also called mean outside diameter. This is due to the fact that the pipe wall of the metal pipe is very thin, and the outer diameter of the pipe is almost the same as th...
2021-10-14 Steel World Comments Off on Important categories of iron ore deposits in my country
my country has a vast territory, with various magmatic (eruptive) rocks from ultrabasic-basic-neutral-acidic-alkaline ages; deposits from Archean to Quaternary ages, including various sedimentary rock...
2021-10-14 Steel World Comments Off on The feasibility test report of an iron ore in Jiangsu
Guiding experts: Huang Kaiguo, Gong Meiling, Zheng Guangdai, Hu Jiyou, Gu Zhongxiang; project leader: Zhang Shiyin I. Introduction To Entrusted by XXXX, Xi’an Tianzhou Mining Science and Technology De...
2021-10-14 Steel World Comments Off on Overview, definition and difference between safety valve and relief valve
1. Overview Safety valves are important safety accessories for boilers, pressure vessels, and other pressure equipment. Its operational reliability and performance are directly related to the safety o...
2021-10-14 Steel World Comments Off on Brief analysis of important ways to extend the application cycle of centrifugal pumps
Centrifugal pumps are widely used in petrochemical, coal chemical and other chemical industries to transport liquids of different properties and provide the pressure and flow required for chemical rea...
2021-10-14 Steel World Comments Off on What are the types of screw pumps and what are the differences between them
Screw pumps are divided into single screw pumps, twin screw pumps, and three screw pumps. This article elaborates on the differences between the four aspects of their structure, characteristics, perfo...
2021-10-14 Steel World Comments Off on Discussion on storage and peak shaving in pipeline natural gas dispatch
Abstract: A large amount of natural gas enters the city, and the imbalance of monthly and seasonal natural gas demand is increasingly affecting the city gas company’s rational user production sc...
