Square tube standard What is it?  

  Rectangular Pipe , is a kind of name for square pipes and rectangular pipes, that is, steel pipes with equal and unequal side lengths. It is rolled from strip steel after processing. Generally, the strip steel is unpacked, leveled, curled and welded to form a round pipe, which is then rolled into a square pipe and cut to the required length. Then Torque tube What is the standard of? GB/T6728-2002, GB/T6725-2002, GBT3094-2000, JG 178-2005, ASTM A500 JIS G3466, EN10210 or technical agreement. GB/T3094-2000 (national standard) Cold pressed profiled rectangular tube GB/T6728-2002 (national standard) Cold formed hollow steel for structure ASTM A500 (American standard) Carbon steel for structure Cold formed round section and profiled welded rectangular tube and seamless rectangular tube EN10219-1-2006 (European standard) Non alloy and fine grain cold formed welded hollow structural section JIS G 3466 (Japanese standard) Standard for different uses of angular rectangular tubes for general construction

1. Galvanized welded square pipe for low-pressure fluid escort, standard number is GB/T3091-2008. Representative materials: Q235A, Q235BQ345B, etc. It is mainly used to escort water, gas, air, oil and heating hot water or steam. It is customer-centric, quality oriented, and reputation oriented. It is only used for ordinary low pressure fluids.

2. Galvanized welded square pipe for low-pressure fluid escort, standard number is GB/T3092-2008. The representative material is the same as above. It is mainly used for escorting ordinary low pressure fluids such as water, gas, air, oil and heating hot water or steam. The surface of the square tube is hot-dip galvanized or cold galvanized anti-corrosion process.

3. The standard number of the welded square tube for mining fluid is GB/T14291-2000. The representative materials are Q235A and B grade steel, which are mainly used for straight seam welded square pipes for mine air pressure, drainage and axial gas drainage.

4. Large diameter electric welded square tube for low pressure fluid escort, standard number is GB/T14980-1994. The representative material is Q235AB. It is mainly used to escort water, sewage, gas, air, heating steam and other low-pressure fluids.

5. Stainless steel welded square tube for mechanical structure, standard number is GB/T12770-1991. Representative materials are 0Cr13, 1Cr17, 00Cr19Ni11, 1Cr18Ni9, 0Cr18Ni11Nb, etc. Mainly used for machinery, automobiles, bicycles, furniture, hotel and restaurant decoration and other mechanical parts and structural parts.

6. Stainless steel welded square tube for fluid escort, standard number is GB/T12771-1991. The representative materials are 0Cr13, 0Cr19Ni9, 00Cr19Ni11, 00Cr17, 0Cr18Ni11Nb, 0017Cr17Ni14Mo2, etc. It is mainly used to escort low-pressure corrosive media.

7. The standard number of spiral square tube for low-pressure escort (standard of the Ministry of Petroleum) is SY/T5037-2008. The representative materials are Q235BQ345B and other carbon steel materials. Mainly used for low pressure water, oil, natural gas, heating and other pipelines.

8. The standard number of square tube used to escort flammable and non flammable fluids is GB/T9711.1 (GB/T9711.2) - 1997. The representative material is L245-L415, and other pipeline steel. It is mainly used to escort flammable and noncombustible fluids to low pressure or high pressure square tubes, with high demands.

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