Product Description Square tube is a name for square pipe and rectangular pipe, which is hollow pipe with equal side length and unequal side length. It is made of strip steel after processing and rolling. Generally, the strip is unpacked, leveled, crimped and welded into a round tube, which is rolled into a square tube and then cut into the required length. The commonly used welding process is arc welding square tube, resistance welding square tube (high frequency, low frequency); Products are widely used in machinery manufacturing, construction, gold industry, agricultural vehicles, agricultural greenhouses, automobile industry, railway, highway guardrail, container skeleton, furniture, decoration and steel structure fields. Product Square and Rectangular welded steel pipe (Hollow section ) Specification Section shape: Square and Rectangular Thickness: 0.5mm-17.75mm Outer diameter: 20mm-660mm Standard BS EN10219, JIS G3466, ASTM A500 Material Q195, Q235, Q235B, St37-2, St52, SS400, STK500, ASTM A53, S235JR Surface Treatment 1. Galvanized 2. PVC,black and color painting 3. Transparent oil,anti-rust oil 4. According to clients requirement Package 1. Bundle 2. Bulk 3. Plastic bags ,etc Min order 10 tons, more quantity price will be lower Payment terms T/T, L/C at sight, western union etc. Deliver time  Within 7-30 days after deposit, ASAP Application 1.Construction / building materials steel pipe 2.Structure steel pipe 3.Solar structure component steel pipe 4.Fence post steel pipe 5.Greenhouse frame steel pipe Others We can do special orders as customer’s requests. We also can provide all kinds of steel hollow pipes. All the production process are made under the ISO9001:2008 strictly Business type Manufacture and exporter Contact Tell: 0086-13012201066 Web: http://www.reliancesteel.cn/ Key words: Square and Rectangular welded steel pipe  Advantages 1. WE CAN OFFER YOU ANY SHAPE AND THICKNESS OF HOLLOW SECTION STEEL PIPE WITH YOUR DESIGN. 2. ALL OF OUR STEEL TUBE HAVE BEEN CERTIFIED BY ISO9001 CERTIFICATION SYSTEMS AND WE CONDUCT THE  HIGH QUALITY CONTROL SYSTEM. 3. THERE'RE MORE THAN 20 YEARS EXPERIENCED AND SPECIALIZED STAFF IN THE FACTORY. 4. WE CAN ALSO OFER YOU THE BEST SERVICE AND HIGH QUALITY, WITH THE MOST COMPETITIVE PRICE. 5. RELIANCE METAL RESOURCE YOUR BEST CHOICE OF STEEL CARGO, WHEN YOU CHOOSE US, YOU WILL NEVER FORGET US. 1. 100% after-sales quality and quantity assurance. 2. Quick reply within 24 hours. 3. Large Stock for regular sizes. 4. Free sample high quality. 5. Strong produce capability and capital flow. Application hollow section steel tube have a wide range of applications due to their strength, durability, and relatively low cost compared to other materials. Some common applications of carbon steel pipes include: 1.Transportation of fluids: Carbon steel pipes are often used for the transportation of fluids, such as water, oil, and gas, in pipelines. These pipes are typically used in the oil and gas industry, as well as in municipal water and wastewater systems. 2.Structural support: Carbon steel pipes are also used for structural support in construction projects, such as in the construction of buildings and bridges. They can be used as columns, beams, or braces, and can be coated or painted to protect against corrosion. 3.Industrial processes: Carbon steel pipes are used in a variety of industrial processes, such as manufacturing and transportation. They are used to transport raw materials, finished products, and waste materials. 4.Heat exchangers: Carbon steel pipes are used in heat exchangers, which are devices that transfer heat between fluids. They are commonly used in the chemical and petrochemical industries, as well as in power generation. 5.Machinery and equipment: Carbon steel pipes are used in the construction of machinery and equipment, such as boilers, pressure vessels, and tanks. These pipes can withstand high pressure and temperature, making them ideal for use in these applications. Certificate BV, ISO certificates and SGS test can be provided to assure the quality of our products. Chemical composition and mechanical properties testing, hydrostatic test, dimensional and visuzal inspection Non destructive inspection Product Flow FAQ 1.Q:Are you a factory or trading company? A: We are manufacturers and also do export trade. 2.Q:Where is your factory located? A: Tianjin Longford Metal Products Co.,Ltd is located in Tianjin Beichen District,which has 12 years experience manufacture in metal raw material and products industry. 3.Q:Can I get some samples? A:Yes,We are pleased to provide you with samples of our products. 4.Q:How about your quality? A:We serious control the quality from raw material to finished pipes. quality.BV, ISO certificates and SGS test can be provided . So please be assured that our goods is qualified. 5.Q: Price advantage ? A: Our price is workable, and we are manufacturer then you can get a competitive price. 6.Q: After sales service. A: Quality are promised. Our com pany good reputation d ues to the quality and service.