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自从1973年第一次石油禁运以来,石油和天然气的价格猛增,以美国国内为中心开始开发过去为了确保本国利益而不曾开发的劣质资源(特别是含H_2S的)。另外目前世界各国多采用强制回收法——EOR(Enhanced Oil Recovery),进行资源的多次回收。因此把以前使用的低合金钢管材用作生产和运输石油和天然气的油井管和管线管时,在性能方面就显得不足,必须使用高耐蚀性能的合金钢管。
Since the first oil embargo in 1973, the price of oil and natural gas has ballooned and the domestic United States has started to develop inferior resources (especially H2S-containing ones) that were not developed in the past to ensure its own interests. In addition, all countries in the world now use the mandatory recovery method - EOR (Enhanced Oil Recovery) to collect resources for many times. Therefore, when using low-alloy steel pipes previously used as oil well pipes and line pipes for producing and transporting oil and natural gas, the performance is inadequate and alloy steel pipes having high corrosion resistance must be used.