Where is the difference between seamless and welded steel pipe? 1. Appearance, seamless and welded steel pipe wall with distinction in welding ribs, but not seamless. 2. Seamless higher pressure, pipe is generally about 10 MPa, there is to do now welded seamless process. 3. rolling a seamless steel pipe is formed. Welded steel pipe welded need to roll back, generally spiral welding and straight welding. Seamless performance better than some 159 * 18 seamless steel pipe, of course, price is also higher. Pipe is a hollow steel bar seamless steel tubes, a large number of channels for transporting fluids, such as oil, natural gas, water, gas, steam, etc. In addition, engaged in bending, torsional strength, lighter weight, so it is widely used in the manufacture of mechanical parts and engineering structures. Also used in the production of conventional weapons, the barrel, shells and so on. Classification of steel pipe: seamless and welded steel pipe points (pipe joints) two categories. Press sectional shape can be divided into tube and shaped tubes, widely used is a circular steel pipe, but there are some square, rectangular, semi-circular, hexagonal, equilateral triangle, octagonal shaped steel tubing. For exposed to the fluid pressure in the hydraulic pipe must withstand the test of capacity and quality, the leak does not occur at a predetermined pressure, wet or expansion of qualified, some steel but also according to standard or demand side, curling trials , flaring test, flattening test. Seamless steel pipe: seamless steel ingot is made of perforated or solid through the capillary tube, and then by the hot-rolled, cold-rolled or cold call is made. Seamless steel pipe wall thickness mm diameter * number indicates. Hot-rolled and cold-rolled seamless steel pipe points (written) seamless steel categories. Hot-rolled seamless steel pipe generally sub, low, medium pressure boiler pipe, high pressure boiler pipe, steel pipe, stainless steel pipe, oil cracking pipe, steel and other steel and other geological. Shandong Liaocheng Polygram Pipe Technology to provide you with Polygram Liaocheng Steel Pipe Manufacturing Co., Ltd. annual production and sales of Baosteel, Chengdu, Tianjin, Baotou Steel, Hengyang and other major steel production of seamless steel tubes and all kinds of high-quality imported alloy tube, all kinds of high-quality structural steel pipe, transmission fluid, high alloy pipe, oil cracking pipe, high pressure chemical fertilizer pipe, and all kinds of alloy tube power, petrochemical, boiler industry. Business philosophy: "the same product than the quality, the same quality than price, the same price than service, the same service than credibility." Enterprise spirit: "unity and hard work, hard work, dedication, pragmatic and innovative" Companies seek sincere cooperation in a wide range of areas in order to improve the overall strength of the enterprise. "Strong technical force, high-quality products, reasonable prices and considerate and efficient service as a tireless enterprising criteria; continue to provide new and old customers better, newer and more comprehensive technical support of the company since its inception, has been focusing on. product quality and process management of difficult products, while external to undertake a variety of difficult processing pipe business to achieve the best possible value customers, is our goal. "credibility hit the market, relying on quality into the world" is I plant business philosophy and based on good faith as the root, quality and reasonable price is our aim to welcome new and old customers to visit our company or calls, letters business negotiation. Liaocheng Polygram Pipe Manufacturing Co., Ltd. Professional management seamless steel pipe large material circulation enterprises, have a good reputation in the steel industry, inventory, annual operating Gang, Steel, Anshan Steel, Bao Steel, Baosteel, Tianjin, Xining, Wuxi, Changzhou and other steel production high-quality seamless steel pipe, alloy tube, Q345B, C, D fertilizer, complete specifications, quality and quantity the company has always been: service first, quality first, reasonable price, customer first, good service, sharing client, Boli more sales for the principle of honesty and trustworthiness for the purpose Material:. 10 #, 20 # (Q235), 35 #, 45 #, 20G, 16Mn (Q345), 27SiMn, 15 CrMo, 12Cr1MoV, 15CrMoV, 35CrMoV, 10CrMoV910, T91, ST45.8-Ⅲ, SA106B and other company's operating philosophy:. "The same product than the quality of the same quality than price, the same price than service, the same service than credibility." entrepreneurial spirit:. "unity and hard work, hard work, professional dedication, pragmatic and innovative "Companies seek sincere cooperation in a wide range of areas in order to improve the overall strength of the enterprise. With the advent of the knowledge economy, the wave of information technology, buttressed by waves rolling towards us. vigorous development of the Internet and global use of rapid population growth, so that we can no longer ignore its enormous influence and potential business opportunities. Our rational use of information resources 480 * 20 seamless steel pipe from each other 377 * 50 seamless steel tubes, the development of enterprises. Now, I plant in the early twenty-first century, with the arrival of the wave of information technology, has joined the information superhighway. Here, I on behalf of the whole staff of the company sincerely welcome new and old customers at home and abroad to discuss cooperation, a total exhibition brilliant!