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...
2021-10-14 Steel World Comments Off on Overview of the process of removing iron and whitening in kaolin (2)
Guide Iron is the primary dyeing element of kaolin. Iron-bearing mineral deposits will turn into Fe2O3 when calcined at high temperature, which makes the kaolin mineral yellow or brick red. In order t...
2021-10-14 Steel World Comments Off on A good way to prolong the service cycle of centrifugal pump
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 Comprehensive planning standard for urban engineering pipelines
Regarding the requirements for issuing the national standard “Code for Comprehensive Planning of Urban Engineering Pipelines” and notifying Genju State Planning Commission of the “Pr...
2021-10-14 Steel World Comments Off on Introduction to basic knowledge of water pump
Significance of pump model: such as 40LG12-15 40- inlet and outlet diameter (mm) LG- high-rise building feed water pump (high speed) 12-Flow (m3/h) 15-Single-stage head (M) 200QJ20-108/8 200—ind...
2021-10-14 Steel World Comments Off on Application of Bellows Heat Exchanger in National Economy
Application of Bellows Heat Exchangers in the National Economy [Abstract] So far, bellows heat exchangers have been widely used in fields such as thermal power, petroleum, chemical, natural gas, light...
2021-10-14 Steel World Comments Off on Analysis of the internationally popular valve procurement work forms
Twenty years of reform and opening up, my country’s economy has developed rapidly, and international exchanges and cooperation in the field of engineering construction are also increasing. The constru...
2021-10-14 Steel World Comments Off on Industrial PVC-C pipe installation guide
Correct installation is very important to the PVC-C piping system. In order to ensure that the system can operate safely for a long time, some installation instructions and precautions for piping inst...
2021-10-14 Steel World Comments Off on Installation instructions for high-temperature and high-pressure steam pipelines
1 Project Overview 1.1 System Introduction The high temperature and high pressure steam pipeline mainly includes the main steam pipeline system and the high and low temperature reheat steam pipeline s...
2021-10-14 Steel World Comments Off on Sealing gasket installation and raw material selection
The choice of gasket material mainly depends on the following three factors: temperature, pressure, and medium. 1. Metal gasket material 1. Carbon steel: The recommended maximum working temperature do...
2021-10-14 Steel World Comments Off on Talking about the difference between castings and stainless steel forgings
The use of castings has a long history. In ancient times, people used castings to make coin sacrificial vessels, weapons, things and some day utensils. However, in modern times, castings are primarily...
2021-10-14 Steel World Comments Off on What technical standards need to be considered when buying a valve
For this reason, this draft is drafted for discussion and whether it can be communicated within the industry after the revision, which arouses the attention of various companies in this regard and imp...
2021-10-14 Steel World Comments Off on Luopu developed the two characteristics of the regulating valve and the difference between the gas film regulating valve
It is reported that Ropp’s new generation of regulating valve RPV6 has come out, which makes this fully functional regulating valve stand out in the world of control valves. It not only has the ...
2021-10-14 Steel World Comments Off on Explanation of various valves
There are many types of valves and a wide range of applications. Sometimes it is the main equipment in the pipeline and plays a controlling role; sometimes it is a secondary equipment and plays an aux...
2021-10-14 Steel World Comments Off on What are the important types of iron ore
There are many kinds of iron minerals. At present, there are more than 300 kinds of iron minerals and iron-containing minerals, of which more than 170 are common. However, under current technical cond...
