Carbon seamless steel tubes oil and gas ERW carbon steel tubes

(1) carbon seamless steel pipe,the importance of structure heavy industrial building structure, large span structure, high-rise or super high-rise civil building structure or structures and other important structures, should consider the use of good quality seamless steel pipe, for general industrial and civil building structure, according to the nature of the work, the use of ordinary quality seamless steel pipe.

(2) carbon seamless steel pipe,The structure bearing dynamic load directly and the structure in strong earthquake area should choose seamless steel pipe with good comprehensive performance; Generally under static load structure can choose the lower price of seamless steel pipe.

(3) carbon seamless steel pipe, Connection method The welding process will produce welding deformation, welding stress and other welding defects, which may lead to cracks or brittle fracture of the structure. Therefore, welding structure should be strict to material requirements.

(4) carbon seamless steel pipe,The temperature and environment of the structure, seamless steel pipe is easy to be cold and brittle at low temperature, so the structure working at low temperature, especially the welding structure, should choose the killed steel with good low temperature brittle fracture resistance. In addition, the open air structure of Taiyuan seamless steel pipe is easy to produce aging, harmful medium effect of seamless steel pipe is easy to corrosion, fatigue and fracture, should also be different to choose different materials.

(5) too seamless steel pipe thickness, thin seamless steel pipe rolling times, rolling compression ratio is large, large thickness of seamless steel pipe compression ratio is small, so the thickness of precision steel pipe is not only small strength, but also poor plasticity, impact toughness and welding performance. Therefore, the welded structure with large thickness should use better seamless steel pipe.