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Today , Hua steel Company will talk more information for our wide pipes size , We provide Five categories of stainless steel pipes: Category 1: stainless steel industrial welded pipes, Hua steel company ability:Food hygiene pipes： The weld can be seamlessly processed without shadows. The whole process is mechanically polished with a thousand-blade wheel with high precision, and the internal polishing Ra value can reach below 0.2μm, which is smooth and traceless, meeting various inner wall requirements; full nitrogen protection welding, pure hydrogen annealing protection, high strength of welded pipes and welds. After testing, the tensile strength is above 690Mpa; the expansion rate is above 30%; the weld does not burst in the expansion, shrinkage, curling, bending, and flattening test, and the processing performance is good. The surface is free of corrosion in the 1000-hour salt spray test. Size:OD：Φ15.9mm~Φ168.3mm Length：3500mm~7500mm（6000mm is stock length） Wall thick：0.89mm~3.05mm Standard：ASTMA270；ISO2037；DIN11850 Material:304 / 304L / 316 / 316L Used for Milk and food industry, pharmaceutical industry, industries with special internal surface requirements. Category 2:About Heat exchanger tubes: AOD refining furnace charge uses 316L steel strips from TISCO, ZPSS,POSCO and other new materials as raw materials; complete specifications, φ8~25mm inventory; argon nitrogen protection welding, online annealing and solid solution, high strength of welded pipes, strong reprocessing performance, expanded pipes will not break, can be bent 180°, and can withstand pressures below 10 MPa/30 kg; mechanical fine internal and external polishing, the finish is below 0.2μm; strong corrosion resistance, 1000 hours of salt spray test without corrosion on the surface. Size：Φ6mm~Φ114.3mm Length：3500mm~7500mm（6000mm is stock length） Wall thick：0.80mm~3.05mm Standard：ASTM A269；ASTM A249；JIS G3463；DIN17457；GB/T 24593 Material:304 / 316L Used for Suitable for medium and low pressure heat exchangers, boilers, radiators, heaters, coolers, condensers, evaporators and reboilers; used in chemical, petroleum, power, biology, pharmaceutical, food and other industries. Category 3：Mechanical structure pipe Advantages: Produced on imported production lines, formed using diamond molds, square tubes with sharp R corners. Full nitrogen protection welding, welds on the edges and corners of the tubes, high weld strength. Pressure bearing capacity can reach over 700kg, and the surface is not corroded after 1000 hours of salt spray test. Size：10*10mm~150*150mm(square tubes) 20*10mm~150*100mm(rectangular tubes) length：3500mm~7500mm（6000mm is common length） Wall thick：0.40mm~3.5mm Standard：ASTM A554；GB/T 12770；JIS G3446 Material: 201 / 304 / 316L Used for medical supplies, medical equipment, etc. Category 4:Large diameter thick pipe The products are produced and processed with refined materials from large domestic steel mills, imported high-end pipe welding machines, and 26 processes for forming and making pipes. The welding section is 100% protected by nitrogen and infrared automatic detection devices for preventing leaking welds. Effectively avoid product defects and leaking welds. Strictly control the production process and quality standards to ensure the “five degrees” of the product (angle, straightness, brightness, bending degree, and tensile strength). Surface ：Bright surface: (400—600#) grit Sand surface: sand number (180#, 240#, 320#), sand pattern (original sand, straight sand) Untreated plain surface: stainless steel cold-rolled bright surface Size: Φ101.6mm~Φ273mm ​100*100~150*150mm(square tube) ​Length: 3500mm~7500mm (6000mm is the normal length) ​Wall thick: 1.5mm~6mm ​Implementation standard: ASTM A554; GB/T 12770; JIS G3446 Material:201 / 304 / 316L Used for anti-collision columns, building supports, decorative stainless steel pipe products, etc. Category 5:Municipal engineering pipe Size：Φ8mm~Φ273mm 10*10~150*150mm(square tube) Length：3500mm~7500mm（6000mmis the normal length)） Wall thick：0.40mm~3.5mm Standard：ASTM A554；GB/T 12770；JIS G3446 Material:201 / 304 / 316L Used for stainless steel pipe products in residential, hotel, airport, subway, station, shopping mall and other construction projects.