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首页> 外文期刊>Rules for Building and Classing Steel Vessels >Materials for Machinery, Boilers, Pressure Vessels, and Piping -- Steel Piping
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Materials for Machinery, Boilers, Pressure Vessels, and Piping -- Steel Piping

机译：机械，锅炉，压力容器和管道的材料-钢管道

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摘要

Grades 1, 2 and 3 cover seamless and welded steel pipe. Pipe ordered under these grades is of a nominal (average) wall thickness suitable for welding and suitable for forming operations involving coiling, bending and flanging, subject to the following limitations: Grade 1 furnace-butt-welded pipe is not intended for flanging; when seamless or electric-resistance-welded pipe is required for close-coiling or cold-bending, Grade 2 should be specified; this provision is not intended to prohibit the cold-bending of Grade 3 pipe. When pipe is required for close-coiling, this is to be specified on the order. Electric-resistance-welded Grades 2 and 3 may be furnished either non-expanded or cold-expanded, at the option of the manufacturer. When pipe is cold expanded, the amount of expansion is not to exceed 1.5% of the outside diameter pipe size.
机译：1级，2级和3级覆盖无缝钢管和焊接钢管。根据这些等级订购的管材具有适合焊接的公称（平均）壁厚，并且适用于涉及卷取，弯曲和翻边的成型操作，但受以下限制：当需要无缝或电阻焊的管道进行密绕或冷弯时，应指定等级2;本规定无意禁止3级管材的冷弯。当需要密闭管时，应在订单上指定。电阻焊接的2级和3级可根据制造商的选择提供非膨胀型或冷膨胀型。当管子冷膨胀时，膨胀量不得超过外径管道尺寸的1.5％。

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