Polyethylene insulation tube features? Dacheng Xiangdong Insulation Refractory Material Factory 13473696600 15731614448
The primary problem of the protection pipe of the direct buried pipeline is the reliability of tight waterproofing. In addition, it has good mechanical strength. The steel casing is welded by high strength, and the waterproof sealing performance is very reliable. In addition, its high temperature resistance is also Other external protection tubes are unmatched.
Buried pipelines are used as transmission carriers for oil and gas and one of the important facilities for ground engineering. It is the link between upstream resources and downstream users. Because the pipeline is buried underground for a long time, along with the influence of external soil characteristics and topographic subsidence, the pipeline will be corroded, perforated and leaked. The field and the country bring serious loss. The economic losses caused by construction and corrosion of oil and gas pipelines can be divided into direct losses and indirect losses. Direct losses include: replacement of equipment and components, repair costs and anti-corrosion fees; indirect losses include: loss of production, loss of products caused by corrosion leakage, accumulation of corrosion products or damage caused by corrosion damage, indirect losses are far greater than direct losses, and Hard to estimate. In addition to the serious economic losses caused by pipeline corrosion, it can also cause the leakage of harmful substances, cause pollution to the environment, and even cause sudden disasters and endanger personal safety. For long-distance pipelines and gathering pipeline networks that transport natural gas, the adoption of pipeline anti-corrosion technology and construction quality are directly related to the safe operation and service life of pipelines. Because the terrain of the pipeline crossing is complex and the soil properties vary widely, the buried steel pipeline needs to adopt different external anti-corrosion measures. The main features of the development of anti-corrosion technology outside the pipeline are reflected in the high performance, composite, long service life and good economy of the anti-corrosion materials.
Avoid pipelines and protect against soil, air and transport media (oil, gas, etc.). Most of the pipelines for conveying oil and gas are in a complex soil environment, and the medium to be transported is also corrosive, so that both the inner and outer walls of the pipeline may be corroded. Once the pipeline is corroded and perforated, it will cause oil and gas loss, which will not only interrupt the transportation, but also pollute the environment, and may even cause fire and damage. According to statistics from the US pipeline industry, direct losses due to corrosion in 1975 amounted to $600 million. Therefore, preventing pipeline corrosion is an important part of pipeline engineering.
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The twist drill is a Tool used to drill round holes in the workpiece by rotating cutting with a relatively fixed axis. Because of its chip slot into a spiral shape and the shape of the twist named. Spiral grooves have 2, 3, or more grooves, but 2 grooves are the most common. The twist drill can be clamped on manual or electric hand-held drilling tools or on drilling machines, milling machines, lathes or even machining centers. The bit material is usually high speed tool steel or hard alloy. Standard twist drill: The twist drill consists of the shank, neck and working part
We have five different materials,HSS-CO8%,HSS-CO5%,HSS-M2,HSS-4341,HSS-4241.From left to right there are from high quality to low quality.
Twist Drill Bit,Glass Cutting Drill Bit,Long Metal Drill Bits,Electric Drill And Bits
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