Part No TTubeO.D. (mm) TxTubeO.D. (in.) L D B E Bx Work. Press, (psig) FAV-M20TSW-12TSW-SS 20 3/4 28.0 27.0 11.2 15.7 11.2 5510 FAV-M28TSW-12TSW-SS 28 3/4 36.8 40.0 20.0 15.7 11.2 5040