The methodology for testing pipeline steels is suggested on the assumption that destruction of pipes in field oil pipelines by mechanism grooving corrosion simultaneous fulfillment such conditions as occurrence scratches lower generatrix pipe, eventually growing into a channel form groove, emulsion enrichment with oxygen, presence pipe wall metal stressed state, chlorine-ion oil-water required....

Abstract A premature pitting corrosion in seam-welded 3-inch L235 steel pipe was reported to occur after 8 years service. This part of a closed ice water cooling system, where the inlet temperature 6 °C and outlet 11 °C. The present work aimed investigate causes this through metallographic investigations. comprised visual examination internal surfaces microstructural examinations perforation re...

Mechanical properties as well crack resistance and stress corrosion cracking (SCC) parameters of ultralow-carbon martensite steels (ULMS) type 05H2G2B HSLA pipe steel 10G2FB with a different structures depending on processing are investigated. It is shown that despite higher strength level, SCC ULMS 25–30% than for ferrite-perlite structure close to this subjected quenching tempering.

Solar energy is used for solar water heater in domestic and industrial purpose. Pulsating heat pipe is a fast responding, flexible and high performance thermal conducting device. The CLPHP system described in this study relies on the natural forces of gravity and capillary action and does not require an external power source. The flat plate collector consisted of a 2 mm thick sheet of Aluminum ...

The gravimetric method was used to determine the corrosion rate of a pipe for coiled tubing. Scanning electron and optical microscopy were study microstructure nature damages. It has been found that processes different occurred in studied systems “metal – environment”, particular, acid solutions, caused by hydrochloric ambient temperature 70°?. In solution with smaller content, along general co...

Corrosion is a major cause of early failure in palm oil mill infrastructure Aceh, Indonesia. Therefore, the aim this study to analyze corrosion rate steel used industry and determine remaining life steel. Round bars plates made were as exposure samples. This sample was cleaned impurities ground with sandpaper obtain 600 grating, then washed clean water rinsed strong liquid, presented climate at...