An automatic device for metal hose welding was designed based on the common latitudinal seam welder,according to the structure of high-pressure metal hose.

This paper describes the application of the safety systems engineering method to solve the pipeline stress of the tanks' exit and entrance and the application of metal hose on the tank of the No.

materlal and paraineter of metal hose,the performance of the metal hose was improved,it meeted the requirement of connecting lance in Pangang converter.

There had existed corrosion and leakage problems for the flexible metal tubes at the satellite platforms in Chengdao Oilfield for many years.

Improving the flexible metal tube used in the system of supply and return steam line for hot press,that is to avoid the leak of the steam,and then to raise the product quality and increase the production profits.

The results show that the metal soften is dominant in dry turning process, a good surface can be acquired in wet turning, and the cutting fluid takes an effective effect at the end of tool wear.

Contrast surface roughness, depth of hardened layer and surface texture of no metal soften with which metal is soften, the result shows that there was little effect on surface quality when the metal soften is affected.