The deterioration of lined cast iron pipes includes corrosion of cast iron pipes together with creep and creep rupture of polymeric liners. Various potential failure modes of lined pipes and the uncertainties of key physical parameters, including geometries, deterioration models and material properties ...
Deterioration Diagnosis Methods of Ductile Cast-Iron Pipe by Impact Elastic-Wave KAMADA Toshiro , UCHIDA Shinya , OJIMA Kenichiro , KURITA Tohru , FUJIWARA... T Kamada,S Uchida,K Ojima,... - 水道協會雜誌 被引量: 1发表: 2012年 A Self-Supervised Model Based on CutPaste-Mix for Ductile Cas...
PROBLEM TO BE SOLVED: To provide a good-coating-adhesion cast-iron pipe corrosion prevention method that prevents the deterioration of a primer layer on a preheated pipe and the pipe corrosion even when left outdoor, by taking full advantage in the lightening weight and durability by powder pai...
1. The valve material selection and the possibility of deterioration in use and necessary periodic inspection by the user is responsible for considering. 2.The valve design only consider the general case, if there are special requirements shall be specified in the contract. 3.The valve d...
Other extra requirements may include higher impact strength to compensate for deterioration in the heat-affected zone. There is a tendency for specifications in this field to become progressively more stringent with the passage of time. Hardness requirements in the bead-on-plate test may be a probl...
Corrosion is known to be the predominant mechanism behind the deterioration of cast-iron water pipes [3]. Additionally, internal pressure, vehicular traffic loads and frost loads induce failure modes such as wall rupture, ring deflection, circumferential cracking, etc., which are usually aggravated ...
While many of the existing cast iron pipelines remain perfectly serviceable, some of them show signs of deterioration, mainly in the form of breaks and leaks. The deteriorated cast iron pipe sections are currently being replaced with polyethylene pipes. When the polyethylene pipes are exposed to ...
The deterioration of cast iron pipes due to corrosion is considered on the basis of recent research. The uncertainties of governing variables, such as the physical properties of soil, cast iron, water pressure and corrosion patterns, in pipe failure risk assessment are considered. Using ...
All of these materials proved unsatisfactory because they were prone to deterioration and frequent break- down. However, they filled a need and were used for hundreds of years until the introduction of cast iron as a pipe material.1 The earliest recorded use of cast iron pipe was at ...
When the casting temperature becomes higher, a binding force of a casting mold is decreased owing to deterioration of a casting mold (sand + binder), and accordingly, the so-called sand intrusion where sand mingles in the cast tends to occur. When the sand intrusion is caused, the tool ...