Frame Pipe
General knowledge of seamless steel tubes
1. steel pipe "> seamless steel pipe is a long steel hollow sections and has gaskets around the steel bar. It is mainly used as a pipeline to transfer the liquid such as oil, natural gas, water and some solid materials, etc. Compared with the resistance to bending torque in the same light, is an economic section steel. Seamless steel tubes are widely used in the manufacture and mechniacal parts such as oil pipe, automotive shaft, planes bikes, as well as buliding construction. Steel tube manufacturing, symmetric parts can improve the utilization of materials, simplifying the manufacturing process, materials and save machining time. For example, roller bearing rings and the cat sets and so on have been widely made of steel tubes. Rube cylindrical delivery can be more fluid since the circle has the largest area of the same circumference. In addition, the ring cross section is internal or external pressure, the force more evenly, so that the vast majority of tubular steel tubes are cylindrical rednecks. However, the tube also has some limitations, as in the plane bending conditions, the best side pipe, rectangular tube bending strength, and a number of framesets, steel-wood furniture in the common use square, rectangular tube.
2.The pressure Seamless steel "> seamless steel pipe
Pressure piping is generally composed of pieces of standard parts, so pressure pipe design component is the selection of standard parts. pressure level of the pipeline is determined pressure level accessories standard.
penstock level consists of two parts:
one is the nominal pressure rating expressed in nominal pressure standard parts. The other is the number of wall thickness as expressed in the wall thickness of the bracket parts.
Pressure pipes grade:
The parameters of the channel characteristics are determined by the nominal pressure level and thickness of the wall is called the degree of pressure tubes.
determine the degree of pressure is not only the basis for the pipe design but also the essence of design. It is the basis of the available pressure pipe, and the pressure title = "pipe" tube> stress condition for verifying the design. and also an important factor affecting investment and reliability.
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