Thick-walled high-pressure seamless steel pipe principle principle of thick-walled seamless steel high pressure high pressure seamless steel pipe production works. High-pressure boiler whether it includes the following steps: Step 1, material preparation; step two, tube heating and rotary piercing; Step three, capillary trim; Step four, thermal expansion deformation sizing; Step five, heat treatment; Step Six, straightening ; Step seven, the mill; Step eight, correction; Step nine, outer wear; Step 10, flaw detection test; 11 steps, and then finishing, final inspection and packaging. The present invention can be produced only in the range of a large group from the high-grade alloy seamless steel pipe 720 * 8, and the investment is relatively small, high product quality, high production efficiency and lower production costs. The main production process high pressure boiler steel tube and billet heating, perforated tube, pipe extension, rolled steel pipe, pipe sizing and reducing, cooling and finishing steel or can be said heating hot steel perforated embryos rolled pickling spray head cut cold drawn carbon burning labeled and packaged goods A method of manufacturing petroleum cracking tube, characterized in that: setting a plurality of rolling stands having rolls, to each different configuration of multiple consecutive rolling direction The mandrel mill, after such a manufacturing production line rolling of seamless steel tubes in the multi-point measurement pipe circumferential direction after rolling on, according to the measurement results, at least control the core both end positions of each axis rod mill final seamless rolling mill roll the base station, so uneven wall thickness to a minimum. Thickness error is relatively large walled alloy seamless steel pipe manufacturers of steel storage practical tips 1. Choose a suitable site and warehouse storage steel site or warehouse, should be selected in clean, smooth drainage area, away from harmful gases or dust factories and mines. The presence on the ground to remove weeds and all sorts of things, to keep the steel clean. In a warehouse not with acid, alkali, salt, cement, steel and other aggressive materials stacked together. Different varieties of steel should be stacked separately, to prevent confusion 325 * 6 pipe to prevent contact corrosion. Heavy sections, rails, shame steel, large diameter steel pipe, forgings, etc., may open dumps. Small and medium steel, wire rod, rebar, caliber steel pipe, steel wire and wire rope, etc., can be expected in a well-ventilated storage shed, but it must be the underlying thatch. Some small steel, sheet, strip, silicon, or thin-walled steel pipes of small diameter, a variety of cold-rolled, cold-drawn steel and high prices, corrosive metal products, can be stored for storage. Treasury should be selected according to the geographical conditions, the general ordinary enclosed warehouse, that is the roof with walls, doors and windows tight, with the Treasury ventilation device. Treasury requires attention to ventilation sunny, rainy close attention to moisture, keep proper storage environment. Liaocheng in Shandong Steel Pipe Manufacturing Co., Ltd. is located in Polygram Big East Liaocheng Economic Development Zone in Shandong Province in the middle. Founded in 1998, with a total investment of 200 million yuan, covers an area of ??160,000 square meters. 660 employees, technical staff of 50 people, 30 management staff. At present, the production of carbon steel, alloy steel seamless steel tubes. Specifications for the 5-426 * 0.5-60MM, length of various types of seamless steel pipe 2-16M, annual sales capacity of 300,000 tons. The company has 28 large and small drawing machine sets, roller hearth heat treatment furnace, medium-sized puncher nine and ￠ 230 hot-rolled steel unit three other advanced production equipment and sophisticated production processes. It has a modern research center 560 * 8 steel, equipped with mechanical properties testing, process performance testing, eddy current testing, ultrasonic testing, hydraulic testing, metallurgical testing, a set of high-precision analysis of carbon and sulfur detection means, and a number of high-quality technology staff and inspection personnel. 325 * 6 steel pipe, steel pipe 89 * 4 (certification), steel supplied by Shandong Steel Pipe Manufacturing Co., Ltd. Liaocheng Polygram. Liaocheng in Shandong Steel Pipe Manufacturing Co. Polygram (www.lcbljgg.com) (www.lcbljgg.com) (www.sdlcblj.com) (www.bljggzz.com) Shandong Liaocheng, wire, pipe, plate manufacturing equipment leaders, over the years, the company implement the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. In Polygram steel leader with the staff warmly welcome all inquiries negotiations to create Polygram steel better future.