How are copper grades divided?
Classification of copper tubes: (1) general copper tubes: copper tubes for conveying low pressure fluids. Made with Q195A, Q215A and Q235A steel. Also can use other steel easy welding manufacturing. Copper pipe to water pressure, bending, flattening and other experiments, the surface quality of certain requirements, usually the length of delivery is 4-10m, often require fixed length (or foot) delivery. Brass specifications with nominal diameter (mm or inches) nominal diameter and different wall thickness, pipe according to the provisions of the common copper and brass thickening two, brass pipe end is divided according to form of threaded and non threaded two. (2) galvanized copper pipe: in order to improve the corrosion resistance of copper tube, copper pipe (clarinet) is galvanized. Galvanized copper pipe is divided into two parts: hot-dip galvanizing and electro - galvanized steel. (3) oxygen tube: used for steel smelting blowing tube, usually with a small diameter welding pipe, specifications from 3/8 inch -2 inch eight. Made of 08, 10, 15, 20 or Q195-Q235 steel strips. For corrosion prevention, some are treated by aluminizing.
The copper tube is divided into pure copper tube and copper alloy tube, pure copper pipe is divided into T2, T3 and oxygen free copper tube. The copper alloy pipe is divided into three major categories: brass tube, bronze tube and white copper tube. These three types of copper and copper alloy tube is different according to the different proportion of mixed metal products, metal smelting and processing, their performance of different use, widely used in civilian and military, to your stationery commodity, the atomic energy science and technology and aerospace equipment.At present, the most popular copper tubes are pure copper tubes such as T2 and T3. 10 mm below the multi-purpose in air-conditioning, refrigerator refrigeration system. Another use is the copper hose used in our homes.The copper level of civilian and military, the national and international standards have directory, manufacturers that factory products also have the certificate of quality and quality inspection book.If special quality requirements are required, consult with the manufacturer individually.
(7) transformer pipe: used in the manufacture of transformers, heat pipes and other heat exchangers, made of plain carbon steel, requiring flattening, expansion, bending and hydraulic testing. Copper tube to fixed feet or double feet delivery, the bending of copper tube has certain requirements. (8): special tube by ordinary carbon structural steel and 16Mn steel welded square tube, rectangular tube, pipe cap, empty plastic steel doors and windows with brass, mainly used for agricultural machinery components, steel window and door etc.. (9) welded thin wall tube: mainly used to make furniture, toys, lamps and so on. In recent years, with the production of stainless steel tube is widely used, furniture, decoration, fences etc.. (10): the spiral copper tube of low carbon carbon steel or low alloy structural steel strips in a helical line certain angle (called forming angle) rolled into a tube, then the tube welding seam made up, it can be used in narrow strip production of large diameter copper tube. The spiral copper tube is mainly used in the pipeline of petroleum and natural gas, and its specifications are indicated by outer diameter * wall thickness. The spiral copper tube has one side welding and two side welding, and the copper pipe should ensure the hydraulic pressure test, the tensile strength and the cold bending property of the weld line.
(4) bushing: it is also an ordinary carbon steel welded copper pipe. It is used in concrete and all kinds of structural distribution projects. The nominal diameter is usually 13-76mm. The casing of the wire sleeve is thinner, and it is mostly used after coating or galvanizing, and the cold bending test is required. (5): Standard Specification for seamless copper pipe metric form, with outer diameter * wall thickness mm welding copper welding with ordinary carbon steel, quality carbon steel or low alloy steel components of the tropics, with the cold or tropical welding after cold drawing method. General points and thin brass metric, used as structural parts, such as shaft or transmission fluid, used in the production of thin furniture, lamps and so on, to ensure that the brass strength and bending test. (6) roller tube: used for belt conveyor roller, welding tube, generally used Q215, Q235A, B steel and 20 steel manufacturing, diameter 63.5-219.0mm. Generally, the water pressure and flattening test are required for the bending of the pipe and the end face to be perpendicular to the center line and ellipticity.
