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Factors affecting sacrificial anode to protect reinforcing steel corrosion
Published in Jaap Bakker, Dan M. Frangopol, Klaas van Breugel, Life-Cycle of Engineering Systems, 2017
P. Sancharoen, A. Mahasiripan, S. Tangtermsirikul
Reinforcing steel was deformed bar grade SD40 according to TIS 20. Its diameter was 12mm and cut to length of 130mm. At the one end, steel was connected by electric wire for accommodating measurement corrosion current. Surface of reinforcing steel was cleaned by wire brush and degreased by acetone. Before being embedded in concrete specimen, both end of cleaned reinforcing steel were coated by waterproof coating to control exposed length of reinforcing steel as 80mm. Final prepared reinforcing steel is shown in Figure 1.
Extruder Design
Published in Isaac Ghebre-Sellassie, Charles Martin, Feng Zhang, James DiNunzio, Pharmaceutical Extrusion Technology, 2018
The first step in cleaning the barrels is to unbolt and to remove all the inserts for manual cleaning. A round wire brush attached to a long piece of stainless-steel pipe is run up and down the barrel bore. If stubborn material deposits there, the brush pipe may be attached to an electrical drill and run up and down the bores while rotating. After this step, the bores are cleaned further using cloth swabs. After the bores are free of all residues, the last step is to swab up and down the bores with a clean cloth soaked in alcohol.
Piping, Baseplate, Installation, and Foundation Issues
Published in Heinz P. Bloch, Allan R. Budris, Pump User’s Handbook, 2021
Heinz P. Bloch, Allan R. Budris
Proper pipe flange to pump nozzle bolt-up is also important. Unless the pump manufacturer gives precise procedural guidelines, the more typical installation and inspection procedure would call for the following: Prior to gasket insertion, check condition of flange faces for scratches, dirt, scale, and protrusions (Ref. 3–10). Wire-brush clean as necessary. Deep scratches or dents (see Table 3-8 for acceptance criteria) will require re-facing with a flange facing machine. Check that flange facing gasket dimension, gasket material and type, and bolting are per specification. Reject non-specification situations. Improper gasket size is a common error.Check gasket condition. Only new gaskets should be used. Damaged gaskets (including loose spiral windings) should be rejected. The ID windings on spiral-wound gaskets should have at least three evenly spaced spot welds or approximately one spot weld every six inches of circumference (consult API-601 for exact specifications).Use a straightedge and check face flatness. Reject warped pipe flanges and pump nozzles.Check alignment of mating flanges. Avoid use of force to achieve alignment. Verify that the flange and nozzle faces are parallel to each other within 10 mils (0.25 mm) at the extremity of the raised face. Ascertain also that flange and nozzle center-lines coincide within 120 mils (3 mm).
Clean-integrity processing and characterization of nuclear-grade austenitic steel components
Published in Materials and Manufacturing Processes, 2023
M.K. Lei, S.H. Liu, J.Y. Gao, D.M. Guo
Figure 4 demonstrates the SEM images of surface morphology for the nuclear-grade AISI 316L austenitic stainless steel samples finished by grinding under a spindle speed of 1500 rpm and sequent polishing under 2000 rpm, respectively. The ground stainless steel samples by the stainless steel wire brushes are demonstrated by surface plastic deformation, shearing, material transfer, and abrasion. The plate-like overlaps originating from the stainless steel wires exist on the ground surface due to the formation of strong adhesion junctions between the stainless steel brush and the stainless steel sample [Fig. 4(a)]. The thicker wire brush of 0.3 mm in diameter has a rougher surface with deeper grooves and prows and greater coverage than that of 0.2 mm [Fig. 4(c)]. With the combined processes of grinding and sequent polishing, the ground stainless steel surface by the stainless steel wire brushes is slightly deformed and scored, with fine abrasive grooves and prows. No material transfer is evident on the ground sample surface [Fig. 4(b,d)]. Compared with the stainless steel wire brushes, the 65Mn carbon spring steel wire brush has a different grinding morphology. The apparently abrasive scratch with shallower grooves and prows is observed for the ground stainless steel samples [Fig. 4(e)]. The similar surface morphology is also observed after the sequent polishing by flap discs. The slightly deformed and scored feature is obtained from the combined processes [Fig. 4(f)]. The flap disc polishing effectively removed the transferred coverage on the samples ground by the stainless steel wire brushes.
Effect of heat input on mechanical and metallurgical properties of AISI 304L stainless steel by using TIG welding
Published in Welding International, 2023
Angshuman Roy, Nabendu Ghosh, Subrata Mondal
A rolled sheet of stainless steel (AISI 304 L) was used as the workpiece material, and (ER308L) was used as the filler material. The schematic diagram of welded sample is shown in Figure 1. A stainless-steel wire brush with acetone is used to clean all plates and filler rods. No edge preparation or grooving is necessary due to the plate’s 3 mm thickness. As a result, the TIG welding machine has produced square butt joint configurations in a flat position. With this in mind, weldment orientation has been deemed to be orthogonal to that of the rolling motion. Mechanical clamps and copper plates have been employed to keep the workpieces from distorting during welding. For the inquiry, different heat input combinations have been used, such as 0.57 kJ/mm (low heat input), 0.63 kJ/mm (mid-heat input), and 0.69 kJ/mm (high heat input). These heat input combinations have been identified after a large number of trials, and these heat inputs are sufficient to cause complete penetration welds. Chemical compositions of parent and filler material are determined by using oxford instruments spectrometer. Table 1 shows the chemical composition (wt. percent). Welding parameters are presented in Table 2 of the document.