A steel performance is good or bad
2020年9月17日 日常Pipe Fittings knowledge
A pipeline system:
You must use the elbow bend the pipe, the pipe size to use adjustable head, forked: to transport liquid or gas, you must use a variety of channels, in addition to straight pipes with steel pipes, but also use all kinds of pipe fittings use a tee, use the pipe flange joints and fittings are connected, in order to achieve the purpose of open transmission medium, but also with a variety of valves, to reduce the impact of thermal expansion or shrinkage of the piping system vibration frequency, but also with the expansion Section. In addition, in the pipeline, as well as with a variety of instruments connected to various joints Q plug and so on. We used to be in the pipeline system and other accessories in addition to straight pipes collectively referred to as pipe fittings.
Second metallic materials common sense:
Metal materials are on our daily lives and the most widely used industrial materials. It is mainly divided into steel, iron and non-ferrous metals and other categories, and one of the most widely used steel is the most common material, steel is the main ingredient is iron, and the rest is artificially added various alloying elements and impurities. It is because of these different varieties added alloying elements. A different number before the formation of a variety of steel, such as ordinary carbon steel, stainless steel, alloy steel, etc. In these added elements, the carbon C plays a very important role .
2.1 common chemical element in steel:
Various steels majority percentage of iron (Fe), other than the, typically contain several of the following elements (commonly referred to as the alloying elements in steel):
C (carbon) Si (silicon) Mn (manganese) P (phosphorus) S (sulfur) and
Cr (chromium) Ni (Nickel) Mo (molybdenum) Ti (titanium) V (vanadium) and so on.
In general, where P, S is an impurity component, the lower the better the quality of steel.
2.2 Classification of Steel: Steel added according to the different varieties of alloying elements, we can simply be divided into three categories of steel: carbon steel, alloy steel, stainless steel.
1. Carbon steel: an alloy element has only C, Si, Mn, P, S five kinds, which according to P, S impurity content level, is divided into carbon steel (P, S general ≤0.040%), and quality carbon steel (P, S general ≤0.03%), common steel grades are:
Carbon steel: Q215A Q235BF
Quality carbon steel: 20 Flue for gas boiler 45 # 16Mn etc.
This steel strength and toughness in general, impatience corrosion, can be used in less demanding situations, the lowest cost.
2. Steel: In addition to five kinds of elements contained in steel, also added Cr 10% or less of Mo V and other elements, common steel grades: 15CrMo 12Cr1MoV 1Cr5Mo like.
Compared with carbon steel, alloy steel, higher strength, heat resistance is also improved, but is still poor corrosion resistance, therefore, steel corrosion is not typically used for high temperature and pressure applications, such as boiler steel, thermal power plant steam delivery etc., the cost at a medium level
3. Stainless steel: carbon steel is usually based on the increase in the proportion of high Cr, Ni alloy is made, the content ratio of # up to 20%. Common steel grades: 304, 304L, 321, 316,316L, 1Cr18Ni9Ti, steel front for several numerical Japan, the United States steel representation, the last one (1Cr18Ni9Ti) for domestic steel representation. The following numeric notation steel to illustrate the relationship between several stainless steel components: As a general understanding, but also easy for beginners to remember, we can not think so (but not quite accurate to say)
flue kits--https://www.chinaflue.com/product/%CF%8660100mm-standard-flue-kit/
A pipeline system:
You must use the elbow bend the pipe, the pipe size to use adjustable head, forked: to transport liquid or gas, you must use a variety of channels, in addition to straight pipes with steel pipes, but also use all kinds of pipe fittings use a tee, use the pipe flange joints and fittings are connected, in order to achieve the purpose of open transmission medium, but also with a variety of valves, to reduce the impact of thermal expansion or shrinkage of the piping system vibration frequency, but also with the expansion Section. In addition, in the pipeline, as well as with a variety of instruments connected to various joints Q plug and so on. We used to be in the pipeline system and other accessories in addition to straight pipes collectively referred to as pipe fittings.
Second metallic materials common sense:
Metal materials are on our daily lives and the most widely used industrial materials. It is mainly divided into steel, iron and non-ferrous metals and other categories, and one of the most widely used steel is the most common material, steel is the main ingredient is iron, and the rest is artificially added various alloying elements and impurities. It is because of these different varieties added alloying elements. A different number before the formation of a variety of steel, such as ordinary carbon steel, stainless steel, alloy steel, etc. In these added elements, the carbon C plays a very important role .
2.1 common chemical element in steel:
Various steels majority percentage of iron (Fe), other than the, typically contain several of the following elements (commonly referred to as the alloying elements in steel):
C (carbon) Si (silicon) Mn (manganese) P (phosphorus) S (sulfur) and
Cr (chromium) Ni (Nickel) Mo (molybdenum) Ti (titanium) V (vanadium) and so on.
In general, where P, S is an impurity component, the lower the better the quality of steel.
2.2 Classification of Steel: Steel added according to the different varieties of alloying elements, we can simply be divided into three categories of steel: carbon steel, alloy steel, stainless steel.
1. Carbon steel: an alloy element has only C, Si, Mn, P, S five kinds, which according to P, S impurity content level, is divided into carbon steel (P, S general ≤0.040%), and quality carbon steel (P, S general ≤0.03%), common steel grades are:
Carbon steel: Q215A Q235BF
Quality carbon steel: 20 Flue for gas boiler 45 # 16Mn etc.
This steel strength and toughness in general, impatience corrosion, can be used in less demanding situations, the lowest cost.
2. Steel: In addition to five kinds of elements contained in steel, also added Cr 10% or less of Mo V and other elements, common steel grades: 15CrMo 12Cr1MoV 1Cr5Mo like.
Compared with carbon steel, alloy steel, higher strength, heat resistance is also improved, but is still poor corrosion resistance, therefore, steel corrosion is not typically used for high temperature and pressure applications, such as boiler steel, thermal power plant steam delivery etc., the cost at a medium level
3. Stainless steel: carbon steel is usually based on the increase in the proportion of high Cr, Ni alloy is made, the content ratio of # up to 20%. Common steel grades: 304, 304L, 321, 316,316L, 1Cr18Ni9Ti, steel front for several numerical Japan, the United States steel representation, the last one (1Cr18Ni9Ti) for domestic steel representation. The following numeric notation steel to illustrate the relationship between several stainless steel components: As a general understanding, but also easy for beginners to remember, we can not think so (but not quite accurate to say)
flue kits--https://www.chinaflue.com/product/%CF%8660100mm-standard-flue-kit/
コメント