Transport fluid steel steel standards

Fluid transport steel steel standards

Abstract works with various types of steel pipes often mix phenomenon in practical engineering. In this paper, the existing standard, and a brief analysis of the transmission fluid with steel pipe manufacturing, materials and the use of related technologies.

Key words pipe; standards; specifications; material

1 Introduction

U.S. steel pipe manufacturing standards, the structure pided with steel pipes with steel pipes and fluid transport. Structural steel is mainly used for general metal structures such as bridges, steel frame, the only requirements to ensure the strength and rigidity of steel pipe rigor required.

Fluid transfer pipe is mainly used for fluid transport with pressure addition to ensure that in accordance with the corresponding requirements of strength and stiffness, it is also required to ensure tightness, that the steel pipe in the request by the root factory hydrostatic test. Its transport medium pressure pipe are often flammable, explosive, toxic, corrosive, temperature and pressure of the media, it should be used for fluid transport pipe. In actual engineering design, procurement and construction, often mix or structural steel instead of fluid transport phenomenon with steel pipe, and the impact on quality, causing a hazard or cause an accident, which is not allowed. Following several fluid conveying steel pipe manufacturing, performance, specifications, materials, and the scope of analysis based on national standards.

Fluid transport steel pipe standard and optional analysis

The fluid delivery with a standard range of the steel pipe, a variety of steel pipe in practice, due to the different nature, process, medium, fluid transport with the manufacturing method, welding methods, materials, specifications, etc. of the steel pipe is also different. For production, construction, maintenance, and other aspects of convenience, to better distinguish the different kinds of steel pipe, the mix between the steel pipe and other kinds of steel pipe to prevent the transport of fluids or misuse, according to the national standard, the following four typical fluid analysis of transport with steel pipes.

2.1 low pressure liquid delivery steel pipe.

GB/T3091 "low pressure liquid delivery GB/T3092 low pressure fluid welded steel pipe galvanized welded steel pipe standard steel pipe is generally furnace welded steel pipe (sometimes resistance welding manufacturing), they are in addition to fluid transport steel pipes must The seized items, only additional the bending test requirements, it is such a steel pipe manufacturing, inspection requirements are relatively low. Their specifications ranging from 1/8 "to 6", the wall thickness of ordinary level and two thicker grade material grades Q195A, Q215, Q235A three kinds applicable to the design temperature of 0 ° C at 100 ° C, the design pressure. More than 0.6MPa water and compressed air systems.

2.2 the ordinary fluid transport with steel pipes.

General fluid steel pipe major general fluid with spiral seam high frequency welded steel pipes, the ordinary fluid transfer spiral submerged arc welded pipe, fluid conveying seamless steel tubes for three.

2.2.1SY/T5038 "general fluid with spiral seam high frequency welded steel using electric resistance welded steel specification range is DN150 to DN500 wall thickness from 4.0mm ~ 10.0mm of nine kinds of specifications, material grades Q195 Q215, Q235 three, applicable to the design temperature does not exceed 200 ° C, ordinary fluid medium is water, gas, air, heating steam.

2.2.2SY/T5037 "general fluid spiral submerged arc welded pipe used in arc welding of steel pipe, the scope of its specifications for DN250 to DN2500 wall thickness from 5.0mm ~ 20.0mm of 15 kinds of specifications, material grades Q195 Q215, Q235 three kinds, applicable to the design temperature 0 ℃ ~ 200 ℃, the design pressure does not exceed 1.0MPa water, gas, air, heating steam ordinary fluid.

The 2.2.3GB/T8163 "transmission fluid with seamless steel tubes", is one of the most widely used pipe manufacturing standards, the method for producing hot-rolled, cold drawn, thermal expansion of three ways specification range DN6 ~~ DN600, wall thickness from 0.25 mm ~ 75.0mm total of 66 kinds of specifications, material grades the 10,20,09 MnV, 16Mn 4, applicable to the design temperature is less than 350 ° C, the design pressure is lower than the general 10.0MPa oil products, oil and gas and public media conditions The transport of fluids.

2.3 Boiler Pipes.

Fluid transport with boiler steel pipe used low and medium pressure boiler seamless steel tubes, high-pressure boiler seamless steel tubes for two.

2.3.1GB3087 "low pressure boiler seamless steel pipe, the method for producing hot-rolled, cold drawn in two ways, the specification range DN6 ~ DN400, wall thickness from 1.5mm ~ 26.0mm and other specifications, material grades 10, 20 of a total of two, suitable for low and medium pressure boiler superheated steam, boiling water, and other media.

2.3.2GB5310 high-pressure boiler seamless steel pipe, a variety of materials including carbon steel, chrome molybdenum steel, stainless steel, steel pipe manufacturing standards, the manufacturing method of hot-rolled, cold drawn in two ways. Its specification range is DN15 ~ DN500, wall thickness from 2.0mm ~ 70.0mm and other specifications, carbon steel grades only 20G kind, suitable for high-pressure boiler superheated steam medium.

2.4 stainless steel tube.

Stainless steel pipe for fluid transport fluid transport stainless steel seamless pipe, boiler, heat exchanger stainless steel seamless pipe two.

2.4.1GB/T14976 "fluid transport stainless steel seamless pipe" is a common standard stainless steel pipe manufacturing method for producing hot-rolled, cold drawn in two ways, the specification range DN6 ~ DN400, wall thickness from 0.5mm ~ 15.0 mm 33 specifications, material grades 0Gr18Ni9 (TP304) 00Gr19Ni10 (TP304L) 0Gr17Ni12Mo2 (TP316) 00Gr17Ni14Mo2 (TP316L) 0Gr18Ni9Ti (TP321) 0Gr18Ni11Nb (TP347) 1Gr18Ni9Ti (not recommended), 0Gr25Ni20 (TP310) 19, for fluid transport in general.

2.4.2GB13296 "boilers, heat exchangers, stainless steel seamless pipe, stainless steel pipe of a boiler and heat exchanger dedicated manufacturing standards, the manufacturing method of hot-rolled, cold drawn in two ways. The scope of its specifications for DN6 ~ DN100, wall thickness from 1.2mm ~ 13.0mm and other specifications, material grades 0Gr18Ni9 (TP304), 00Gr19Ni10 (TP304L), 0Gr17Ni12Mo2 (TP316), 00Gr17Ni14Mo2 (TP316L), 0Gr18Ni9Ti (TP321), 0Gr18Ni11Nb (TP347), 1Gr18Ni9Ti (not recommended), 0Gr25Ni20 (TP310) 25.

3 Conclusion

The various fluid transport steel pipe material, performance, specifications and applicable conditions are stringent regulations in the standard not only the structure can not be mixed with steel pipes, steel pipes and fluid transport a variety of fluid transfer between a steel pipe can not be freely mixed. Therefore, in the actual construction projects all fluid transport in the selection of steel pipes, pipe fittings and welding consumables should pay attention to the following questions: 1 Note in strict accordance with the appropriate standard in the production and construction selection; 2, attention must file in accordance with the design types of requirements, specifications, materials, selection; 3, note that the selection should be in accordance with the level of technology in the construction of its production; steel pipe must have a quality certificate and factory certification, should be carried out in the production and construction material identification mix and test, test, state identification, in order to avoid causing serious consequences.

References

[1] GB/T3091 "low-pressure fluid delivery galvanized welded steel pipe

[2] GB/T3092 "low pressure liquid delivery welded steel pipe

[3] SY/T5038 "general fluid high frequency welded steel pipes with spiral seam"

[4] SY/T5037 "the ordinary fluid transport with spiral seam submerged arc welded pipe

[5] GB/T8163 "transmission fluid with seamless steel pipe

[6] GB3087 "low and medium pressure boiler seamless steel pipe

[7] GB5310 "high-pressure boiler seamless steel pipe

[8] GB/T14976 "fluid transport stainless steel seamless pipe

[9] GB13296 "boilers, heat exchangers, stainless steel seamless tubes

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