Specimen Preparation Series

Preparation decides whether a mechanical result is repeatable. This group covers the three cuts that most often go wrong by hand: slow-crack-growth specimen notching, dumbbell specimen milling, and pipe end cutting with chamfering for butt-fusion and pressure testing.

制样决定力学结果能否复现。这一组覆盖最容易手工做坏的三个环节：慢速裂纹扩展试样刻痕、哑铃试样铣削、管端切割倒角（用于热熔对接与压力试验）。

Not sure which test standard applies? The RTP pipe testing machine items maps every required test item to its standard and to the machine that performs it.
不确定该做哪一项试验？型式试验对照表按标准列出试验项目与对应机型。