The calculation method of steel pipe support in current specifications is not uniform, and it unsafe to directly apply the stability coefficient vertical bar code, which leads frequent safety accidents fastener supports. Through field statistics initial defects pipe, found that bending values 3 m 6 pipes with largest size are larger L/400. table obtained by taking L/400 as defect, 43.15% smalle...

Destructive testing of creep exposed components is a powerful tool for evaluation of remaining lifetime of high temperature pipe systems. The most common destructive evaluation method used today is uniaxial creep testing. Uniaxial creep tests can produce accurate creep curves but the test method has some drawbacks such as costliness and long testing times. It also demands large sample material ...

The chemical content of water pH, mineralization, alkalinity, hardness, calcium and magnesium compounds, carbon dioxide free provide guidance about buffering capacity of water. Therefore, if the mineralization and pH is low, the water is aggressive towards the materials used in manufacturing pipes concrete, steel, HDPE, PVC, PAX. If the mineralization is high, the pH is high, too and the water ...

As one of key techniques for guided waves NDT based on magnetostrictive effect, the transducer is a “bridge” which plays an important role in practical inspection. In the experiments, we find that the guided wave echo-signals detected in pipes are affected by the position of the magnetostrictive transducer. First, guided waves’ generation mechanism and its propagating characteristics in pipes a...