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Anonymous users2024-02-15The wall thickness of the welded pipe of the <> national standard 100 should be 4mm, and the thickening should be 5mm.
Welded steel pipe, also known as welded pipe, is a steel pipe made of steel plate or strip steel after being curled and formed, generally with a fixed length of 6 meters. The production process of welded steel pipe is simple, the production efficiency is high, the variety and specification are many, and the equipment investment is less, but the general strength is lower than that of seamless steel pipe.
The commonly used materials for welded pipes are: Q235A, Q235C
Q235B, 16Mn, 20, Q345, L245, L290, X42, X46, X60, X Cr Cr, Cr19Ni, Cr18Ni, Cr18Ni, 11Nb, etc.
The blank used in welded steel pipes is steel plate or strip steel, which is divided into furnace welded pipes, electric welded (resistance welded) pipes and automatic arc welded pipes due to their different welding processes. Because of its different welding forms, it is divided into two types: longitudinal welded pipe and spiral welded pipe. Because of its end shape, it is divided into round welded pipe and special-shaped (square, flat, etc.) welded pipe.
Welded pipes are divided into the following varieties due to their different materials and uses:
GB T3091-2008 (welded steel pipes for low-pressure fluid transfer). It is mainly used for transporting water, gas, air, oil and heating hot water or steam and other general low pressure fluids and other purpose pipes. Its representative material is: Q235A grade steel.
GB T14291-2006 (Welded Steel Pipe for Mine Fluid Transfer). It is mainly used for longitudinal welded steel pipes for mine compressed air, drainage, and shaft gas. Its representative material is Q235A, grade B steel.
GB T12770-2002 (stainless steel welded steel pipe for mechanical structure). It is mainly used in machinery, automobiles, bicycles, furniture, hotel and restaurant decoration and other mechanical parts and structural parts. Its representative materials: 0cr cr cr19ni cr18ni cr18ni11nb and so on.
GB T12771-1991 (stainless steel welded steel pipe for fluid transfer). It is mainly used for conveying low-pressure corrosive media. The representative materials are 0cr cr19ni cr19ni cr cr18ni11nb, 0017cr17ni14mo2, etc.
In addition, welded stainless steel pipes for decoration (GB T 18705-2002), stainless steel welded pipes for architectural decoration (JG T 3030-1995), and welded steel pipes for heat exchangers (YB4103-2000).
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Anonymous users2024-02-14100 welded pipe wall thickness: ordinary pipe, thickened pipe. Now the thickness of the welded pipe is too much, and it can be produced according to user requirements, see GB3091 for details.
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Anonymous users2024-02-13dn (nominal diameter.
250 is generally what the industry calls 273, welded steel pipes.
Spiral steel pipe) thickness is generally between 6-8mm, which is more common.
The wall thickness error standard of welded steel pipe is 2mm.
Simulation parameter range: vertical pipe: pipe diameter d=lomm, pipe length l=660mm.
Three kinds of vertical T-welded steel pipes: diameter d=10mm, T-welded steel pipe curvature.
The ratio of diameter to spiral diameter changed DC D=15, 20, 25, spiral pitch pt=20mm, and tube length L=503mm, L=660mm, L=817mm, respectively.
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Anonymous users2024-02-12The thickness of the national standard of galvanized steel pipe 100 is 4mm.
DN100 galvanized pipe national standard thickness and weight positive posture thickness is millimeters, while the weight is kilogram meters. According to the formula for calculating the weight of the wall thickness (outer diameter - wall thickness), it can be known that its weight is: kilogram meters.
Precautions for buying galvanized steel pipes:
1. Specification size: Specification size is one of the primary factors considered in our selection process. If you buy the wrong one, you can lose a lot.
Of course, we can judge whether it is suitable through its specification table, especially when choosing a special specification of the production chain, we need to further confirm with the manufacturer to ensure that the required product can be obtained. In addition, the specifications and dimensions of the product must be written into the contract, so that everyone can follow the traces and avoid unnecessary trouble.
2. Test quality: the appearance of the galvanized pipe must be smooth, without obvious quality defects such as zinc tumors and burrs, and it is silvery-white, it has no hydrogen embrittlement, and there is no temperature hazard, which can ensure the stability of the material mechanics and strong corrosion resistance, even if the neutral salt spray test is carried out for 10 days, it will not affect the performance, and can replace some hot-dip galvanizing processes.
3. The comprehensive strength of the manufacturer: Generally speaking, the large-scale production enterprises have strong comprehensive performance, high factory efficiency, and stable and guaranteed product quality. For this reason, when we buy, we can properly understand which factory this steel pipe is produced by, so that we can also know it when we use it.
Of course, if you choose a strong manufacturing company, its products will be improved, and these factors should also be fully considered when we make a choice. <>
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