pipe forming techniques

　　large diameter seamless pipe forming techniques mainly include: heat extrusion method, hot piercing rolling method. The details are as follows:

 

　hot extrusion method,The need for billet machining pretreatment before extrusion, the extruded tube diameter below 100mm, low equipment investment, less waste of materials, technology is more mature. But once the pipe diameter size, by using the method of hot pressing need of large tonnage and large power equipment, the corresponding control system to upgrade.

　　hot piercing rolling method,Hot piercing rolling in longitudinal rolling extension and cross rolling elongation. Longitudinal rolling rolling main Co. mandrel pipe mill rolling, Hebei Shengtian Group Reaguan Pipeline Co., Ltd has high production efficiency, low metal consumption, good product quality, advanced control system, widely used. Cross rolling elongation rolling method with less investment, short process, suitable for small batch, multi varieties, multi specifications and high precision in the thick wall seamless steel tube production and also obtained the widespread application.

　　　SRT is a Group Company. Full name is Hebei Shengtian Group Reaguan Pipeline Co., Ltd, which mainly produce and export seamless steel pipes, spiral  steel pipes, welded steel pipes and oil pipes . Our annual output is 150000 tons. We have variety of specialized Engineers 98 persons that can supply better, convenient and fast service to our clients. Your want is always the direction of our efforts. Our company can supply you the following standards pipes. API Spec 5L, API 5L PLS1/PLS2,  ASTM B36.10M-1996,DIN17175 ST45-III, DIN17440，BS EN 10255, SY/T5037-2012, SY/T5040-2012,  BS1387,BS1139, BS EN10219, GB/T3091,ASTM A53,ISO65, ASTM A500,BS EN10296-2006, JIS G3460, JISG3444-2006, JISG3445-2006, etc. Sizes are from 1/4 inch to 140 inches and thickness is from 2mm to 60mm - See more at: http://www.strpipeline.com/#sthash.7I7eLMml.dpuf