Factors affecting strip pickling
1. The influence of hydrochloric acid concentration and temperature In the hydrochloric acid solution, the pickling speed increases with the increase of acid concentration and temperature, but because...
Energy-saving application of Linko frequency converter in the oil pump of oil storage depot
Foreword: In the operation and production process of oil depots, oil transfer pumps are the most frequently used equipment in the entire production system. Most oil transfer pumps in oil depots use st...
Study on the efficiency of the new type ferroelectric ceramic raw material medium
1 In order to obtain ceramic capacitor materials with better dielectric functions, this article selects PM N-PT-BT (ie Pb (M g 1/ 3 N b 2/ 3) O 3-PbT iO 3-BaT iO 3) ternary system , And its doping mod...
Want to post a good article in the direction of lithium battery? Learn about common research methods of lithium motors!
In recent years, the lithium battery articles published in internationally renowned journals can either achieve breakthrough performance or thoroughly study the mechanism. The mechanism research is to...
Electric heating of steel ingots
Electric reheating of ingot (electric reheating of ingot) The heating of a steel ingot in an electric furnace. There are many types of electric furnaces, and the electric furnaces used for heating ste...
Cylindrical gear machining process
The machining process of cylindrical gears should generally include the following: gear blank machining, tooth surface processing, heat treatment process and tooth surface finishing. In the process of...
Water flow control technology of component air-cooled heat pump unit
Introduce the water flow guarantee method of modular air-cooled heat pump unit and the application of pressure difference water flow switch in modular water system. Key words: Modular unit air-cooled ...
Brief Introduction of Magnetite Beneficiation Process and Equipment
Magnetite occupies a large proportion of China’s iron mineral reserves, reaching 48.8%. Finding a reasonable magnetite beneficiation technology and machinery to deal with magnetite is of great s...
Annealing purpose of stainless steel strip
In order to obtain the best performance of stainless steel materials or to create necessary conditions for stainless steel users to perform stainless steel cold and hot processing, stainless steel mat...
Research and Development of Large Diameter Centrifugal Casting Ductile Iron Pipe
1. Production scale selection Our factory originally only had two water-cooled metal centrifugal casting machines, the maximum specification is DN700, and the annual production of DN100-DN700 ductile ...
Industrial piping engineering installation and standard specifications (8)
5 Pipe welding 5.0.2 Article 5.2.19 of the original code stipulates that “the distance between the two circumferential seams of a straight pipe section shall not be less than 100 mm”. It i...
tensile strength
The tensile strength of high-strength concrete is divided into three types: axial tensile strength, split tensile strength and bending strength. Because the axial tensile test is more complicated, it ...
How to remove iron impurities in kaolin
Kaolin, as an industrial mineral deposit with excellent functions, is widely used in ceramics, papermaking, rubber, plastics, building materials, paints, petrochemicals, etc., especially in the cerami...
It is suitable to stop the pump during the zero-flow water supply
.Introduction In order to save energy and reduce cost, variable frequency water supply usually adopts multiple pumps in parallel with constant pressure variable water supply. This is because: ①a v...
The difference between HRA, HRB and HRC in Rockwell hardness
The so-called various hardnesses are the values measured by different measurement methods according to the hardness level. They are organized according to some standards for reference. Please read t...
The growth and application of water ring heat pump VRV products abroad
Abstract: Introduce a new type of air-conditioning method that has emerged in foreign countries in the past ten years. This article introduces the development and application of VRV water ring heat pu...
Technical Specification for Polyethylene Gas Pipeline Engineering (4)
6 Test and acceptance 6.0.1 The test and acceptance of polyethylene gas pipelines shall comply with the current industry standard “Code for Construction and Acceptance of Urban Gas Transmission ...
Comparison table of tensile strength and hardness
Tensile strength N / mm2 Vickers Brinell hardness Rockwell hardness Tensile strength N / mm2 Vickers Brinell hardness Rockwell hardness RmHVHBHRCRmHVHB HRC2508076112535033335.52708580.7111536034236.62...
Welding process measures and electric soldering iron application method
1. Introduction of electric soldering iron 1. External heating electric soldering iron is generally composed of soldering iron tip, soldering iron core, shell, handle, plug and other parts. The solder...
Pipeline automatic welding technology and processing technology control
All-position automatic welding of the pipeline means that when the pipeline is relatively fixed, the welding trolley drives the welding to move around the pipe wall along the track to realize automati...
45# steel heat treatment
Heat treatment process of 45# (number) steel and 40Cr steel quenched and tempered Quenching and tempering is a double heat treatment of quenching and high temperature tempering, and its purpose is to ...
Selection and operation of low-voltage high-power inverter
The correct selection of the frequency converter is essential to the normal operation of the electrical control system of mechanical equipment. To choose a frequency converter, first of all, we must c...
Application of Cathodic Protection Process in Buried Steel Pipelines
Cathodic protection is one of the electrochemical protection methods in the metal anticorrosion process. It applies an electric current to the protected metal body, so that the electrode potential is ...
45 steel hardness
One method is quenching, which simply increases the hardness, but the toughness is poor and easy to fracture; the second is annealing after quenching to increase the hardness without reducing the toug...
Research on the application of high-voltage frequency converter in high-power fan and pump
As we all know, the application of high-voltage motors is extremely wide, and it is the main driving force in industrial and mining enterprises. It is widely used to drive fans, pumps, compressors and...
What is the pipeline pressure rating
Pipeline pressure grade Pressure piping components are generally standard parts, so the design of pressure piping components is mainly the selection of its standard parts, and the determination of pip...
Steel knowledge: profiles
1. Classification of profiles 1. Simple section steel ①square steel——hot-rolled square steel, cold-drawn square steel; ②round steel——hot-rolled round steel, forged round steel, cold-drawn round steel ...
Which top journal is strongest? Journal Citation Reports takes you to see the top journal analysis
Journal Citation Reports is a product of Thomson Reuters and can be accessed through the link at the top of the web of science database. Journal Citation Reports provides a systematic and objective ev...
What are the commonly used words for pressure vessels
pipe and tube pipe plate plate rods and bars specification for standard pressure, parts standard pressure components unidentified use of over thickness listed in Section II welded vessels with thickne...
What is the steelmaking process flow?
Slagging: the operation of adjusting the composition, alkalinity, viscosity and reaction ability of slag in the production of steel and iron. The purpose is to refine the metal with the required compo...
Method for producing crystal glazing for aluminum profile by electrostatic spraying process
With the wide application of aluminum profiles in the decoration industry, the surface treatment technology of aluminum profiles has also developed rapidly. Electrostatic spraying and electrophoresis ...
China Petrochemical Corporation Safety Valve Setting Requirements
Sinopec [2001] An Zi No. 30 1.0 General Principle 1.1 Purpose and scope of application 1.1.1 In order to meet the requirements of “Safety valves should generally be checked at least once a year” in th...
The application process of the clamp type joint of the fire pipe
Traditional fire-fighting pipeline connection methods (wire connection, welding) gradually exposed some shortcomings in engineering applications over time. A new type of fire-fighting piping interface...
Knowledge of zinc alloy die castings
1 Subject content and scope of application This standard specifies the classification, technical requirements, test methods, inspection methods, inspection rules, delivery conditions, etc. of zinc all...
Application status and development direction of pipe hydroforming technology
In response to the development trend of lightweight, high-performance, and energy-saving transportation vehicles, the technology of Tube Hydroforming or Internal High Pressure Forming has attracted gr...
Tianshan Aluminum: In recent years, the company has been better able to withstand fluctuations in raw material prices through co...
Some investors asked Tianshan Aluminum (002532). Hello, Secretary of the Board of Directors. In the near future, the price of aluminum has risen sharply and the raw materials of electrolytic aluminum ...