Large diameter thick wall seamless steel pipe

Thick-walled seamless pipes can be divided into three types: hot rolling (extrusion), welding and cold working. A hot-rolled seamless steel pipe is a steel pipe in which a solid pipe blank or a steel ingot is perforated and rolled into a hollow section, and the basic process is perforation and rolling. Cold-worked seamless steel tubes are secondary processing of steel pipes (including thick-walled seamless pipes and secondary processing of thin-walled seamless steel pipes). Cold working is an important method to obtain high-precision, high-performance pipes, including cold rolling, cold drawing, cold tension reduction and cold spinning. High-alloy steel grades are mainly produced by extrusion of extruded metal seamless pipes.

The raw material of the large-diameter thick-walled seamless pipe is a round tube blank, and the production process is as follows: the billet is sent to the furnace for heating at a temperature of about 1200 °C. The fuel is hydrogen or acetylene. Temperature control in the furnace is a key issue. After the round billet is released from the furnace, it is subjected to a through-hole punching machine. Generally, the common punching machine is a conical roller punching machine. After perforation, the round billet is successively rolled, rolled or extruded by three rolls. After extrusion, the tube should be sizing. The sizing machine is rotated at a high speed by a conical drill bit into a steel core to form a thick-walled seamless pipe. The inner diameter of the thick-walled seamless pipe is determined by the outer diameter of the sizing machine drill bit.

The thick-walled seamless pipe enters the cooling tower and the steel pipe is sized. After cooling by water spray, the steel pipe is straightened after being cooled. After the steel pipe is straightened, it is sent to a metal flaw detector (or water pressure test) by a conveyor belt for internal flaw detection. If there are cracks inside the steel pipe, bubbles and other problems will be detected. After thick wall seamless pipe quality inspection, it must be carefully selected by hand. After the quality inspection of thick-walled seamless pipes, spray the numbers, specifications, production batch numbers, etc. with paint. It is hoisted into the warehouse by a crane.

Shandong Kaian Pipe Industry Co., Ltd. is a large-scale enterprise that produces and sells seamless steel pipes, thick-walled seamless pipes, precision steel pipes, straight seam steel pipes, hot-dip galvanized steel pipes, plastic-coated steel pipes, round steels and alloy steel plates. Seamless Steel Tube Plant, Tianjin Big Seamless Steel Tube Plant, Baotou Steel Tube Plant, Chengdu Seamless Steel Tube Plant, Metallurgical Seamless Steel Tube Plant Group, Baosteel Pipe Plant) and other excellent steel pipe factories, the above corporate legal persons are shareholders Form partner. Since its inception, we have been adhering to the business policy of “survive by quality, develop by product, cooperate with credit, and win customers with service”. Under the guidance of this business policy, the company sells and distributes as a general agent all the year round. : Tianjin Seamless Steel Tube Plant, Chengdu Pangang, Baotou Steel, Metallurgical Steel, Baosteel, Anshan Iron and Steel and other major steel mills seamless pipe, stainless steel seamless steel pipe and alloy pipe. The company has a modern large open-air library and indoor library, prepared There are more than 27,000 tons in stock. The company has advanced cold-drawn seamless pipe production equipment, and high-tech employees, can customize cold-drawn seamless steel tubes of various specifications and materials. Our products are of good quality and high precision. , small tolerances, prompt delivery, welcome to order. The materials are: 10#, 20#, 45#, 16Mn, 20Cr, 40Cr, 15CrMo, 35CrMo, and the like. The implementation standards are: GB/T3639-2009 Uses: It can be used for mechanical structures, hydraulic equipment, cylinders, rollers, parts processing, automotive (motorcycle) parts, diamond thin-walled drill bits. Production range and tolerance: 10-203*1-28mm tolerance 2-10 wire

Product features: The company's cold drawn seamless precision tube, cold drawn seamless precision steel pipe without pitting, scratches, cracks, bumps and other appearance defects, the inner and outer surface is bright, the precision is much larger than the ordinary cold drawn tube, the minimum tolerance 2 silk. Therefore, it is often used in areas where high precision and finish are required to improve product quality and reduce processing costs.

The company's main products: domestic high-pressure alloy tubes, materials: A335P11, P91, P92, 15CrMoG, 12Cr1MoVG, 1Cr5Mo, Cr5Mo, Cr9Mo, 0Cr9Mo, 15CrMo, 35CrMo, 12Cr1MoV, 10CrMo910, A335P91, 1Cr2Mo, 15MnV, 37Mn5, 10Cr9Mo1VNb, 15NiCuMoNb5, 12Cr2MoWVTiB, WB36, SA106B, ST45.8-III, etc.; General carbon high-pressure boiler tube GB5310-2008 Material: 20G, 20MG, 25MG, 15MoG, 20MoG, fertilizer special tube GB6479-2000 Material: 10, 20G, Q345 , Q390, 10MoVNb, 12CrMo, 15CrMo, 12Cr2Mo, petroleum cracking pipe GB9948-2013 material: 10, 20, 12CrMo, 15CrMo, 1Cr2Mo, 1Cr5Mo; hydraulic support pipe GB/T17398-1998 material: 27SiMn, structural pipe GB/T8162-2008 materials are: 10, 20, 35, 45, 40Mn2, 45Mn2, 27SiMn, 20Cr, 40Cr, 20CrMo, 35crMo, 38CrMoAl, 50CrV, 30CrMnSi; transport liquid pipe GB/T8163-2008 material: 10, 20, Q295, Q345; oil well tubing, coupling material tube APISPEC5CT material: J55, N80 and so on.