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1. Standard: ASTM A36, A500, EN10025, EN10255
2. Materials: ASTM A36, A500, GR.B, S195T, SS400, ST37, ST52.3 etc.
3. Specification: 15*15mm-800*800mm.
4. Shape: square, rectangle.
5. The surface treatment: hot galvanized, electro-galvanized, coated with oil, pickling.
6. Application: Widely used in machinery manufacturing, construction, metallurgical industry, agricultural vehicles, agricultural
greenhouses, automotive, railway, highway guardrail, container framework, furniture, decoration as well as steel and other
1. The low pressure fluid galvanized welded pipe, standard number is GB / T3091-2008. Representative of material Q235A,
Q235BQ345B like. Mainly used for conveying water, gas, air, oil and heating hot water or steam, use is limited to general low
2. Low pressure fluid galvanized welded pipe, standard number is GB / T3092-2008. Representative material above. Mainly
used for conveying water, gas, air, oil and heating hot water or steam and other general low pressure fluid, the pipe surface
using hot-dip galvanizing or cold galvanizing anti-corrosion technology.
3. Mine liquid weld pipe, standard number I GB / T14291-2000. Representative of material Q235A, grade B steel is mainly
used for mine air pressure, drainage, gas discharge shaft with a straight seam welded square tube.
4. The low pressure fluid with a large diameter welded pipe, standard number GB / T14980-1994. Representative material
Q235AB level. Mainly used for conveying water, sewage, gas, air, steam heating and other low pressure fluids.
5. The mechanical structure with stainless steel welded pipe, standard number GB / T12770-1991. Representative material
0Cr13,1Cr17,00Cr19Ni11,1Cr18Ni9,0Cr18Ni11Nb like. Mainly used in machinery, automobiles, bicycles, furniture, hotel and
restaurant decoration and other mechanical components and structures.
6. Fluid transport stainless steel welded pipe, standard number GB / T12771-1991. Representative material for
0Cr13,0Cr19Ni9,00Cr19Ni11,00Cr17,0Cr18Ni11Nb, 0017Cr17Ni14Mo2 like. Mainly used for conveying low pressure corrosive
7. The low pressure delivery spiral square tube (Ministry of Oil Standards) standard number is SY / T5037-2008.
Representative material for Q235B Q345B and other steel materials. Mainly for low conveying water, oil, gas, heating and
8. Transport flammable and non-flammable fluid pipe, standard number GB / T9711.1 - 1997. Representative material for
L245-L415, etc. (GB / T9711.2) pipeline steel. Mainly used to transport flammable and non-flammable fluid with low or high
pressure pipe, require relatively high.
Square & Rectangle steel pipe production process
We have two kinds of packaging: 1. Package suitable for every kind of transport; 2. According to customer's requirement.
API SPEC 5L - 2009.pdf
ASME B36.19 - 1985.pdf
ASME B16.34 - 2004.pdf
ASME B16.47 - 1996.pdf
Product name: square & rectangle tubeMaterials: ASTM A36, A500, GR.B, S195T, SS400, ST37, ST52.3 etc.
Standard: ASTM A36, A500, EN10025, EN10255Specification: 15*15mm-800*800mm. Shape: square, rectangle. Surface: bare, galvanized, oiled, pickling. Application: construction, machinery manufacturing, steel engineering, electrical engineering, agricultural and chemical machinery, highway railings, petroleum, bridges.
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