api188Above pipe sizes are available in API 5L Gr. B, X42, X46, X52, X56, X60, X65, X70, X80, X100 and X120 material grade. API 5L Pipe Schedule ChartDownload scientific diagram | Scheme of the labeling process to prepare the API, 188 Re-MN-16ET, from the precursor, protected-H 3 MN-16ET. from publication: Liquid Chromatography