api188API 5L Welded Steel Pipes Technical Data of Pipes Conforming to API 5L mm Outside Diameter Mass of Plain End Pipe Standard Test Pressure 4½ 114.3 4.500 0.125Above 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 Chart