The accompanying tables show working pressure ratings of tubing in a wide range of wall thicknesses. Except as noted, allowable pressure ratings are calculated from S values as specified by ASME , Process Piping. Swagelok tube fittings have been repeatedly tested in both the minimum and maximum wall thicknesses shown. Swagelok tube fittings are not recommended for tube wall thicknesses outside the ranges shown in the accompanying tables for each size. | Tubing Data Contents Tubing Selection . 1 Tubing Handling. 1 Gas Service . 2 Tubing Installation. 2 Suggested Allowable Working Pressure Tables Carbon Steel Tubing. 3 Stainless Steel Tubing . 4 Copper Tubing . 6 Aluminum Tubing . 7 Alloy 400 Tubing. 8 Alloy C-276 Tubing . 9 Alloy 20 Tubing . 9 Alloy 600 Grade 2 Titanium Tubing .10 SAF 2507 Super Duplex Tubing . 11 Alloy 825 Tubing . 11 Alloy 625 Tubing . 12 Elevated Temperature Tubing Selection Proper selection handling and installation of tubing when combined with proper selection of Swagelok tube fittings are essential to reliable tubing systems. The following variables should be considered when ordering tubing for use with Swagelok tube fittings Surface finish Material Hardness Wall thickness. Tubing Surface Finish Many ASTM specifications cover the above requirements but they often are not very detailed on surface finish. For example ASTM A450 a general tubing specification reads 11. Straightness and Finish Finished tubes shall be reasonably straight and have smooth ends free of burrs. They shall have a workmanlike finish. Surface imperfections Note may be removed by grinding provided that a smooth curved surface is maintained and the wall thickness is not decreased to less than that permitted by this or the product specification. The outside diameter at the point of grinding may be reduced by the amount so removed. Tubing Material Our suggested ordering instructions for each type of tubing are shown under the respective tables. Tubing Outside Diameter Hardness The key to selecting proper tubing for use with metal Swagelok tube fittings is that the tubing must be softer than the fitting material. Swagelok tube fittings are designed to work properly with the tubing that is suggested in the ordering instructions. Swagelok stainless steel tube fittings have been repeatedly tested successfully with tubing with hardness up to 200 HV and 90 HRB. Tubing Wall Thickness The .
