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 426 * 50 seamless steel mill; Step eight 480 * 20 seamless steel tubes, 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, and a relatively small investment, 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 pipe 159 * 18 seamless steel pipe wall thickness was measured in the circumferential direction after rolling on a multi-point on, according to its determination As a result, at least the mandrel mill were controlled both ends of the shaft of the final position of each rolling mill roll base, so that the uneven wall thickness to a minimum. Thickness error is relatively large walled alloy seamless Liaocheng Polygram Pipe Manufacturing Co., sales of a variety of oxygen annealing precision light pipe, seamless steel pipe 45, 20 seamless steel pipe, 16MN, Q345B , Q345C, Q345D seamless steel tubes, thick-walled pipe, 20G, 12CR1MOVG, 15CRMOG high pressure seamless steel tubes, high pressure boiler seamless steel tubes, 1CR5MO, 35CRMO, 42CRMO, 20CR, 40CR alloy seamless steel pipe, precision seamless steel pipe, carbon steel pipe , stainless steel pipe. It applies to all areas of construction, mining, textile, electric power, boilers, machinery, chemical, military and so on. We have a good reputation and quality products, solid strength, reasonable price and perfect after-steel reputation more than 30 provinces, municipalities, autonomous regions, municipalities and Southeast Asia, the product won user trust. Liaocheng in Shandong Steel Pipe Manufacturing Co. Polygram annual sales of major steel production of GB / T8162-99 structure tube, GB / T8163-99 fluid pipe, GB / T3087-99 low pressure boiler tubes, GB / T5310-95 high pressure boiler pipe, GB / T6479-2000 fertilizer dedicated pipe, 27SiMn hydraulic support tube, high pressure steel pipe, GB / T9948-85 oil cracking pipe GB9948-88, geological drilling pipe YB235-70, automobile axle casing YB / T5035-96 , line pipe GB / T9711.1, GB / T9711.2, GB / T9711.3 Our philosophy is "quality first, good faith", we will always adhere to the "quality first, reputation first, customers first First, safety first "principle of four to provide our clients with quality products and quality service, warm welcome to new and old customers to visit! Liaocheng in Shandong Steel Pipe Manufacturing Co. Polygram provide you with five advantages, allowing you to sit back and enjoy worry-free service. 1. The price advantage of the company's procurement of goods channels through years of continuous development and development, the establishment of the Shanghai Baoshan Iron and Steel, Hengyang Steel Plant, Taiyuan, Tianjin Steel Pipe Company, Anshan Iron and Steel, Anyang Iron and Steel, Hebei and Shandong and other places of the major manufacturers protocol proxy or direct sales The partnership, to provide you with the lowest prices available. 2. Quality assurance of product quality by the major steel mills have strict ISO9000 quality system certification, and product performance to meet customer requirements, all products can enjoy the manufacturers after sales support. 3. Loaning services we provide one-stop services, including Loaning services including worry for you, so you stay away from money worries, to ensure smooth production, to achieve maximum benefits. 4. Delivery of professional logistics system, tailored to your supply program, fully protect your interests. 5. improve the service of our sales team on standby to process your complaints and suggestions, you will enjoy the manufacturers and our after-sales support double